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fix url completion for hash urls

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Jan Lukas Gernert 2023-03-30 21:27:35 +02:00
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10 changed files with 895 additions and 170 deletions
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2
resources/tests/readability/base-url-base-element-relative/expected.html
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@ -12,7 +12,7 @@
<p><a href="http://fakehost/test/base/foo/bar/baz.html" target="_blank">link</a></p> <p><a href="http://fakehost/test/base/foo/bar/baz.html" target="_blank">link</a></p>
<p><a href="http://fakehost/test/base/foo/bar/baz.html" target="_blank">link</a></p> <p><a href="http://fakehost/test/base/foo/bar/baz.html" target="_blank">link</a></p>
<p><a href="http://fakehost/foo/bar/baz.html" target="_blank">link</a></p> <p><a href="http://fakehost/foo/bar/baz.html" target="_blank">link</a></p>
<p><a href="http://fakehost/test/base/#foo" target="_blank">link</a></p> <p><a href="#foo">link</a></p>
<p><a href="http://fakehost/test/base/baz.html#foo" target="_blank">link</a></p> <p><a href="http://fakehost/test/base/baz.html#foo" target="_blank">link</a></p>
<p><a href="http://fakehost/foo/bar/baz.html#foo" target="_blank">link</a></p> <p><a href="http://fakehost/foo/bar/baz.html#foo" target="_blank">link</a></p>
<p><a href="http://test/foo/bar/baz.html" target="_blank">link</a></p> <p><a href="http://test/foo/bar/baz.html" target="_blank">link</a></p>

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resources/tests/readability/engadget/expected.html
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@ -19,7 +19,7 @@
<h4> Gallery: Xbox One <h4> Gallery: Xbox One
X | 14 Photos </h4> X | 14 Photos </h4>
<div data-behavior="lightbox_trigger" data-engadget-slideshow-id="803271" data-eng-bang='{"gallery":803271,"slide":7142088,"index":0}' data-eng-mn="93511844"> <div data-behavior="lightbox_trigger" data-engadget-slideshow-id="803271" data-eng-bang='{"gallery":803271,"slide":7142088,"index":0}' data-eng-mn="93511844">
<p><a href="http://fakehost/test/base/#" data-index="0" data-engadget-slide-id="7142088" data-eng-bang='{"gallery":803271,"slide":7142088,"index":0}' target="_blank"> <p><a href="#" data-index="0" data-engadget-slide-id="7142088" data-eng-bang='{"gallery":803271,"slide":7142088,"index":0}'>
<img src="https://o.aolcdn.com/images/dims?thumbnail=980%2C653&amp;quality=80&amp;image_uri=https%3A%2F%2Fs.blogcdn.com%2Fslideshows%2Fimages%2Fslides%2F714%2F208%2F8%2FS7142088%2Fslug%2Fl%2Fxbox-one-x-review-gallery-1-1.jpg&amp;client=cbc79c14efcebee57402&amp;signature=9bb08b52e12de8e4060f863a52c613489529818d"> <img src="https://o.aolcdn.com/images/dims?thumbnail=980%2C653&amp;quality=80&amp;image_uri=https%3A%2F%2Fs.blogcdn.com%2Fslideshows%2Fimages%2Fslides%2F714%2F208%2F8%2FS7142088%2Fslug%2Fl%2Fxbox-one-x-review-gallery-1-1.jpg&amp;client=cbc79c14efcebee57402&amp;signature=9bb08b52e12de8e4060f863a52c613489529818d">
</a></p> </a></p>
@ -193,7 +193,7 @@
<h3> Gallery: Xbox <h3> Gallery: Xbox
One X screenshots | 9 Photos </h3> One X screenshots | 9 Photos </h3>
<div data-behavior="lightbox_trigger" data-engadget-slideshow-id="803330" data-eng-bang='{"gallery":803330,"slide":7142924}' data-eng-mn="93511844"> <div data-behavior="lightbox_trigger" data-engadget-slideshow-id="803330" data-eng-bang='{"gallery":803330,"slide":7142924}' data-eng-mn="93511844">
<p><a href="http://fakehost/test/base/#" data-index="0" data-engadget-slide-id="7142924" data-eng-bang='{"gallery":803330,"slide":7142924}' target="_blank"> <p><a href="#" data-index="0" data-engadget-slide-id="7142924" data-eng-bang='{"gallery":803330,"slide":7142924}'>
<img src="https://o.aolcdn.com/images/dims?thumbnail=980%2C653&amp;quality=80&amp;image_uri=https%3A%2F%2Fs.blogcdn.com%2Fslideshows%2Fimages%2Fslides%2F714%2F292%2F4%2FS7142924%2Fslug%2Fl%2Fxbox-one-x-screenshot-gallery-2-1.jpg&amp;client=cbc79c14efcebee57402&amp;signature=38c95635c7aad58a8a48038e05589f5cf35b1e28"> <img src="https://o.aolcdn.com/images/dims?thumbnail=980%2C653&amp;quality=80&amp;image_uri=https%3A%2F%2Fs.blogcdn.com%2Fslideshows%2Fimages%2Fslides%2F714%2F292%2F4%2FS7142924%2Fslug%2Fl%2Fxbox-one-x-screenshot-gallery-2-1.jpg&amp;client=cbc79c14efcebee57402&amp;signature=38c95635c7aad58a8a48038e05589f5cf35b1e28">
</a></p> </a></p>

12
resources/tests/readability/google-sre-book-1/expected.html
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@ -41,7 +41,7 @@
<dd> <dd>
<p> <p>
A notification intended to be read by a human and that is pushed to a system such as a bug or ticket queue, an email alias, or a pager. Respectively, these alerts are classified as <em>tickets</em>, <em>email alerts</em>,<sup><a data-type="noteref" id="id-LvQuvtYS7UvI8h4-marker" href="http://fakehost/test/base/#id-LvQuvtYS7UvI8h4" target="_blank">22</a></sup> and <em>pages</em>. A notification intended to be read by a human and that is pushed to a system such as a bug or ticket queue, an email alias, or a pager. Respectively, these alerts are classified as <em>tickets</em>, <em>email alerts</em>,<sup><a data-type="noteref" id="id-LvQuvtYS7UvI8h4-marker" href="#id-LvQuvtYS7UvI8h4">22</a></sup> and <em>pages</em>.
</p> </p>
</dd> </dd>
@ -101,7 +101,7 @@
<dd> <dd>
<p> <p>
Dashboards should answer basic questions about your service, and normally include some form of the four golden signals (discussed in <a data-type="xref" href="http://fakehost/test/base/#xref_monitoring_golden-signals" target="_blank">The Four Golden Signals</a>). Dashboards should answer basic questions about your service, and normally include some form of the four golden signals (discussed in <a data-type="xref" href="#xref_monitoring_golden-signals">The Four Golden Signals</a>).
</p> </p>
</dd> </dd>
@ -149,7 +149,7 @@
Your monitoring system should address two questions: what’s broken, and why? Your monitoring system should address two questions: what’s broken, and why?
</p> </p>
<p> <p>
The "what’s broken" indicates the symptom; the "why" indicates a (possibly intermediate) cause. <a data-type="xref" href="http://fakehost/test/base/#table_monitoring_symptoms" target="_blank">Table 6-1</a> lists some hypothetical symptoms and corresponding causes. The "what’s broken" indicates the symptom; the "why" indicates a (possibly intermediate) cause. <a data-type="xref" href="#table_monitoring_symptoms">Table 6-1</a> lists some hypothetical symptoms and corresponding causes.
</p> </p>
<table id="table_monitoring_symptoms"> <table id="table_monitoring_symptoms">
<caption> <caption>
@ -285,7 +285,7 @@
Worrying About Your Tail (or, Instrumentation and Performance) Worrying About Your Tail (or, Instrumentation and Performance)
</h2> </h2>
<p> <p>
When building a monitoring system from scratch, it’s tempting to design a system based upon the mean of some quantity: the mean latency, the mean CPU usage of your nodes, or the mean fullness of your databases. The danger presented by the latter two cases is obvious: CPUs and databases can easily be utilized in a very imbalanced way. The same holds for latency. If you run a web service with an average latency of 100 ms at 1,000 requests per second, 1% of requests might easily take 5 seconds.<sup><a data-type="noteref" id="id-QQLuAIXFxCz-marker" href="http://fakehost/test/base/#id-QQLuAIXFxCz" target="_blank">23</a></sup> If your users depend on several such web services to render their page, the 99th percentile of one backend can easily become the median response of your <span>frontend</span>. When building a monitoring system from scratch, it’s tempting to design a system based upon the mean of some quantity: the mean latency, the mean CPU usage of your nodes, or the mean fullness of your databases. The danger presented by the latter two cases is obvious: CPUs and databases can easily be utilized in a very imbalanced way. The same holds for latency. If you run a web service with an average latency of 100 ms at 1,000 requests per second, 1% of requests might easily take 5 seconds.<sup><a data-type="noteref" id="id-QQLuAIXFxCz-marker" href="#id-QQLuAIXFxCz">23</a></sup> If your users depend on several such web services to render their page, the 99th percentile of one backend can easily become the median response of your <span>frontend</span>.
</p> </p>
<p> <p>
The simplest way to differentiate between a slow average and a very slow "tail" of requests is to collect request counts bucketed by latencies (suitable for rendering a histogram), rather than actual latencies: how many requests did I serve that took between 0 ms and 10 ms, between 10 ms and 30 ms, between 30 ms and 100 ms, between 100 ms and 300 ms, and so on? Distributing the histogram boundaries approximately exponentially (in this case by factors of roughly 3) is often an easy way to visualize the distribution of your requests. The simplest way to differentiate between a slow average and a very slow "tail" of requests is to collect request counts bucketed by latencies (suitable for rendering a histogram), rather than actual latencies: how many requests did I serve that took between 0 ms and 10 ms, between 10 ms and 30 ms, between 30 ms and 100 ms, between 100 ms and 300 ms, and so on? Distributing the histogram boundaries approximately exponentially (in this case by factors of roughly 3) is often an easy way to visualize the distribution of your requests.
@ -362,10 +362,10 @@
The principles discussed in this chapter can be tied together into a philosophy on monitoring and alerting that’s widely endorsed and followed within Google SRE teams. While this monitoring philosophy is a bit aspirational, it’s a good starting point for writing or reviewing a new alert, and it can help your organization ask the right questions, regardless of the size of your organization or the complexity of your service or system. The principles discussed in this chapter can be tied together into a philosophy on monitoring and alerting that’s widely endorsed and followed within Google SRE teams. While this monitoring philosophy is a bit aspirational, it’s a good starting point for writing or reviewing a new alert, and it can help your organization ask the right questions, regardless of the size of your organization or the complexity of your service or system.
</p> </p>
<p> <p>
When creating rules for monitoring and alerting, asking the following questions can help you avoid false positives and pager burnout:<sup><a data-type="noteref" id="id-a82udF8IBfx-marker" href="http://fakehost/test/base/#id-a82udF8IBfx" target="_blank">24</a></sup> When creating rules for monitoring and alerting, asking the following questions can help you avoid false positives and pager burnout:<sup><a data-type="noteref" id="id-a82udF8IBfx-marker" href="#id-a82udF8IBfx">24</a></sup>
</p> </p>
<ul> <ul>
<li>Does this rule detect <em>an otherwise undetected condition</em> that is urgent, actionable, and actively or imminently user-visible?<sup><a data-type="noteref" id="id-0vYuEFpSjSMtLfG-marker" href="http://fakehost/test/base/#id-0vYuEFpSjSMtLfG" target="_blank">25</a></sup> <li>Does this rule detect <em>an otherwise undetected condition</em> that is urgent, actionable, and actively or imminently user-visible?<sup><a data-type="noteref" id="id-0vYuEFpSjSMtLfG-marker" href="#id-0vYuEFpSjSMtLfG">25</a></sup>
</li> </li>
<li>Will I ever be able to ignore this alert, knowing it’s benign? When and why will I be able to ignore this alert, and how can I avoid this scenario? <li>Will I ever be able to ignore this alert, knowing it’s benign? When and why will I be able to ignore this alert, and how can I avoid this scenario?
</li> </li>

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resources/tests/readability/guardian-1/expected.html
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<meta itemprop="url" content="https://i.guim.co.uk/img/media/05cb692c634cd90e5411aab92ca3e649474ff786/0_0_4800_3200/master/4800.jpg?width=700&amp;quality=85&amp;auto=format&amp;fit=max&amp;s=f5b3d20f0dc5c22a83f96fb709ecd204"> <meta itemprop="url" content="https://i.guim.co.uk/img/media/05cb692c634cd90e5411aab92ca3e649474ff786/0_0_4800_3200/master/4800.jpg?width=700&amp;quality=85&amp;auto=format&amp;fit=max&amp;s=f5b3d20f0dc5c22a83f96fb709ecd204">
<meta itemprop="width" content="4800"> <meta itemprop="width" content="4800">
<meta itemprop="height" content="3200"> <meta itemprop="height" content="3200">
<a href="http://fakehost/test/base/#img-2" data-link-name="Launch Article Lightbox" data-is-ajax="" target="_blank"> <a href="#img-2" data-link-name="Launch Article Lightbox" data-is-ajax="">
<div> <div>
<picture> <picture>
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<meta itemprop="width" content="4800"> <meta itemprop="width" content="4800">
<meta itemprop="height" content="3200"> <meta itemprop="height" content="3200">
<a href="http://fakehost/test/base/#img-14" data-link-name="Launch Article Lightbox" data-is-ajax="" target="_blank"> <a href="#img-14" data-link-name="Launch Article Lightbox" data-is-ajax="">
<div> <div>
<picture> <picture>
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resources/tests/readability/ietf-1/expected.html
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@ -51,50 +51,50 @@ Copyright Notice
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
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<span>de Jong [Page 1]</span> <span>de Jong [Page 1]</span>
</pre> </pre>
<pre><a name="page-2" id="page-2" href="http://fakehost/test/base/#page-2" target="_blank"> </a> <pre><a name="page-2" id="page-2" href="#page-2"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
Table of Contents Table of Contents
<a href="http://fakehost/test/base/#section-1" target="_blank">1</a>. Introduction...................................................<a href="http://fakehost/test/base/#page-2" target="_blank">2</a> <a href="#section-1">1</a>. Introduction...................................................<a href="#page-2">2</a>
<a href="http://fakehost/test/base/#section-2" target="_blank">2</a>. Terminology....................................................<a href="http://fakehost/test/base/#page-3" target="_blank">3</a> <a href="#section-2">2</a>. Terminology....................................................<a href="#page-3">3</a>
<a href="http://fakehost/test/base/#section-3" target="_blank">3</a>. Storage model..................................................<a href="http://fakehost/test/base/#page-3" target="_blank">3</a> <a href="#section-3">3</a>. Storage model..................................................<a href="#page-3">3</a>
<a href="http://fakehost/test/base/#section-4" target="_blank">4</a>. Requests.......................................................<a href="http://fakehost/test/base/#page-4" target="_blank">4</a> <a href="#section-4">4</a>. Requests.......................................................<a href="#page-4">4</a>
<a href="http://fakehost/test/base/#section-5" target="_blank">5</a>. Response codes.................................................<a href="http://fakehost/test/base/#page-7" target="_blank">7</a> <a href="#section-5">5</a>. Response codes.................................................<a href="#page-7">7</a>
<a href="http://fakehost/test/base/#section-6" target="_blank">6</a>. Versioning.....................................................<a href="http://fakehost/test/base/#page-7" target="_blank">7</a> <a href="#section-6">6</a>. Versioning.....................................................<a href="#page-7">7</a>
<a href="http://fakehost/test/base/#section-7" target="_blank">7</a>. CORS headers...................................................<a href="http://fakehost/test/base/#page-8" target="_blank">8</a> <a href="#section-7">7</a>. CORS headers...................................................<a href="#page-8">8</a>
<a href="http://fakehost/test/base/#section-8" target="_blank">8</a>. Session description............................................<a href="http://fakehost/test/base/#page-8" target="_blank">8</a> <a href="#section-8">8</a>. Session description............................................<a href="#page-8">8</a>
<a href="http://fakehost/test/base/#section-9" target="_blank">9</a>. Bearer tokens and access control...............................<a href="http://fakehost/test/base/#page-9" target="_blank">9</a> <a href="#section-9">9</a>. Bearer tokens and access control...............................<a href="#page-9">9</a>
<a href="http://fakehost/test/base/#section-10" target="_blank">10</a>. Application-first bearer token issuance.......................<a href="http://fakehost/test/base/#page-10" target="_blank">10</a> <a href="#section-10">10</a>. Application-first bearer token issuance.......................<a href="#page-10">10</a>
<a href="http://fakehost/test/base/#section-11" target="_blank">11</a>. Storage-first bearer token issuance...........................<a href="http://fakehost/test/base/#page-11" target="_blank">11</a> <a href="#section-11">11</a>. Storage-first bearer token issuance...........................<a href="#page-11">11</a>
<a href="http://fakehost/test/base/#section-12" target="_blank">12</a>. Example wire transcripts......................................<a href="http://fakehost/test/base/#page-12" target="_blank">12</a> <a href="#section-12">12</a>. Example wire transcripts......................................<a href="#page-12">12</a>
<a href="http://fakehost/test/base/#section-12.1" target="_blank">12.1</a>. WebFinger................................................<a href="http://fakehost/test/base/#page-12" target="_blank">12</a> <a href="#section-12.1">12.1</a>. WebFinger................................................<a href="#page-12">12</a>
<a href="http://fakehost/test/base/#section-12.2" target="_blank">12.2</a>. OAuth dialog form........................................<a href="http://fakehost/test/base/#page-13" target="_blank">13</a> <a href="#section-12.2">12.2</a>. OAuth dialog form........................................<a href="#page-13">13</a>
<a href="http://fakehost/test/base/#section-12.3" target="_blank">12.3</a>. OAuth dialog form submission.............................<a href="http://fakehost/test/base/#page-14" target="_blank">14</a> <a href="#section-12.3">12.3</a>. OAuth dialog form submission.............................<a href="#page-14">14</a>
<a href="http://fakehost/test/base/#section-12.4" target="_blank">12.4</a>. OPTIONS preflight........................................<a href="http://fakehost/test/base/#page-15" target="_blank">15</a> <a href="#section-12.4">12.4</a>. OPTIONS preflight........................................<a href="#page-15">15</a>
<a href="http://fakehost/test/base/#section-12.5" target="_blank">12.5</a>. Initial PUT..............................................<a href="http://fakehost/test/base/#page-15" target="_blank">15</a> <a href="#section-12.5">12.5</a>. Initial PUT..............................................<a href="#page-15">15</a>
<a href="http://fakehost/test/base/#section-12.6" target="_blank">12.6</a>. Subsequent PUT...........................................<a href="http://fakehost/test/base/#page-16" target="_blank">16</a> <a href="#section-12.6">12.6</a>. Subsequent PUT...........................................<a href="#page-16">16</a>
<a href="http://fakehost/test/base/#section-12.7" target="_blank">12.7</a>. GET......................................................<a href="http://fakehost/test/base/#page-16" target="_blank">16</a> <a href="#section-12.7">12.7</a>. GET......................................................<a href="#page-16">16</a>
<a href="http://fakehost/test/base/#section-12.8" target="_blank">12.8</a>. DELETE...................................................<a href="http://fakehost/test/base/#page-17" target="_blank">17</a> <a href="#section-12.8">12.8</a>. DELETE...................................................<a href="#page-17">17</a>
<a href="http://fakehost/test/base/#section-13" target="_blank">13</a>. Distributed versioning........................................<a href="http://fakehost/test/base/#page-17" target="_blank">17</a> <a href="#section-13">13</a>. Distributed versioning........................................<a href="#page-17">17</a>
<a href="http://fakehost/test/base/#section-14" target="_blank">14</a>. Security Considerations.......................................<a href="http://fakehost/test/base/#page-19" target="_blank">19</a> <a href="#section-14">14</a>. Security Considerations.......................................<a href="#page-19">19</a>
<a href="http://fakehost/test/base/#section-15" target="_blank">15</a>. IANA Considerations...........................................<a href="http://fakehost/test/base/#page-20" target="_blank">20</a> <a href="#section-15">15</a>. IANA Considerations...........................................<a href="#page-20">20</a>
<a href="http://fakehost/test/base/#section-16" target="_blank">16</a>. Acknowledgments...............................................<a href="http://fakehost/test/base/#page-20" target="_blank">20</a> <a href="#section-16">16</a>. Acknowledgments...............................................<a href="#page-20">20</a>
<a href="http://fakehost/test/base/#section-17" target="_blank">17</a>. References....................................................<a href="http://fakehost/test/base/#page-21" target="_blank">21</a> <a href="#section-17">17</a>. References....................................................<a href="#page-21">21</a>
<a href="http://fakehost/test/base/#section-17.1" target="_blank">17.1</a>. Normative References.....................................<a href="http://fakehost/test/base/#page-21" target="_blank">21</a> <a href="#section-17.1">17.1</a>. Normative References.....................................<a href="#page-21">21</a>
<a href="http://fakehost/test/base/#section-17.2" target="_blank">17.2</a>. Informative References...................................<a href="http://fakehost/test/base/#page-21" target="_blank">21</a> <a href="#section-17.2">17.2</a>. Informative References...................................<a href="#page-21">21</a>
<a href="http://fakehost/test/base/#section-18" target="_blank">18</a>. Authors' addresses............................................<a href="http://fakehost/test/base/#page-22" target="_blank">22</a> <a href="#section-18">18</a>. Authors' addresses............................................<a href="#page-22">22</a>
<span><a name="section-1" href="http://fakehost/test/base/#section-1" target="_blank">1</a>. Introduction</span> <span><a name="section-1" href="#section-1">1</a>. Introduction</span>
Many services for data storage are available over the internet. This Many services for data storage are available over the internet. This
specification describes a vendor-independent interface for such specification describes a vendor-independent interface for such
@ -109,7 +109,7 @@ Table of Contents
<span>de Jong [Page 2]</span> <span>de Jong [Page 2]</span>
</pre> </pre>
<pre><a name="page-3" id="page-3" href="http://fakehost/test/base/#page-3" target="_blank"> </a> <pre><a name="page-3" id="page-3" href="#page-3"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -128,11 +128,11 @@ Table of Contents
The exact details of these four actions are described in this The exact details of these four actions are described in this
specification. specification.
<span><a name="section-2" href="http://fakehost/test/base/#section-2" target="_blank">2</a>. Terminology</span> <span><a name="section-2" href="#section-2">2</a>. Terminology</span>
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in <a href="http://fakehost/test/base/rfc2119" target="_blank">RFC 2119</a> [<a href="http://fakehost/test/base/#ref-WORDS" target="_blank">WORDS</a>]. document are to be interpreted as described in <a href="http://fakehost/test/base/rfc2119" target="_blank">RFC 2119</a> [<a href="#ref-WORDS">WORDS</a>].
"SHOULD" and "SHOULD NOT" are appropriate when valid exceptions to a "SHOULD" and "SHOULD NOT" are appropriate when valid exceptions to a
general requirement are known to exist or appear to exist, and it is general requirement are known to exist or appear to exist, and it is
@ -141,7 +141,7 @@ Table of Contents
implement the general requirement when such failure would result in implement the general requirement when such failure would result in
interoperability failure. interoperability failure.
<span><a name="section-3" href="http://fakehost/test/base/#section-3" target="_blank">3</a>. Storage model</span> <span><a name="section-3" href="#section-3">3</a>. Storage model</span>
The server stores data in nodes that form a tree structure. The server stores data in nodes that form a tree structure.
Internal nodes are called 'folders' and leaf nodes are called Internal nodes are called 'folders' and leaf nodes are called
@ -160,7 +160,7 @@ Table of Contents
<span>de Jong [Page 3]</span> <span>de Jong [Page 3]</span>
</pre> </pre>
<pre><a name="page-4" id="page-4" href="http://fakehost/test/base/#page-4" target="_blank"> </a> <pre><a name="page-4" id="page-4" href="#page-4"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -170,12 +170,12 @@ Table of Contents
* content length * content length
* content * content
<span><a name="section-4" href="http://fakehost/test/base/#section-4" target="_blank">4</a>. Requests</span> <span><a name="section-4" href="#section-4">4</a>. Requests</span>
Client-to-server requests SHOULD be made over https [<a href="http://fakehost/test/base/#ref-HTTPS" target="_blank">HTTPS</a>], and Client-to-server requests SHOULD be made over https [<a href="#ref-HTTPS">HTTPS</a>], and
servers MUST comply with HTTP/1.1 [<a href="http://fakehost/test/base/#ref-HTTP" target="_blank">HTTP</a>]. Specifically, they servers MUST comply with HTTP/1.1 [<a href="#ref-HTTP">HTTP</a>]. Specifically, they
MUST support chunked transfer coding on PUT requests. Servers MAY MUST support chunked transfer coding on PUT requests. Servers MAY
also offer an optional switch from https to SPDY [<a href="http://fakehost/test/base/#ref-SPDY" target="_blank">SPDY</a>]. also offer an optional switch from https to SPDY [<a href="#ref-SPDY">SPDY</a>].
A request is considered successful if the HTTP response code is in A request is considered successful if the HTTP response code is in
the 2xx range (e.g. 200 OK, 201 Created), and unsuccessful if an the 2xx range (e.g. 200 OK, 201 Created), and unsuccessful if an
@ -211,14 +211,14 @@ Table of Contents
<span>de Jong [Page 4]</span> <span>de Jong [Page 4]</span>
</pre> </pre>
<pre><a name="page-5" id="page-5" href="http://fakehost/test/base/#page-5" target="_blank"> </a> <pre><a name="page-5" id="page-5" href="#page-5"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
field, representing the folder's current version. field, representing the folder's current version.
A successful GET request to a folder MUST be responded to with a A successful GET request to a folder MUST be responded to with a
JSON-LD [<a href="http://fakehost/test/base/#ref-JSON-LD" target="_blank">JSON-LD</a>] document (content type 'application/ld+json'), JSON-LD [<a href="#ref-JSON-LD">JSON-LD</a>] document (content type 'application/ld+json'),
containing as its 'items' field a map in which contained documents containing as its 'items' field a map in which contained documents
appear as entries &lt;item_name&gt; to a document description, and appear as entries &lt;item_name&gt; to a document description, and
contained non-empty folders appear as entries &lt;item_name&gt; '/' to a contained non-empty folders appear as entries &lt;item_name&gt; '/' to a
@ -262,7 +262,7 @@ Table of Contents
<span>de Jong [Page 5]</span> <span>de Jong [Page 5]</span>
</pre> </pre>
<pre><a name="page-6" id="page-6" href="http://fakehost/test/base/#page-6" target="_blank"> </a> <pre><a name="page-6" id="page-6" href="#page-6"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -273,9 +273,9 @@ Table of Contents
gzipped when requested by the client, since the two bodies would not gzipped when requested by the client, since the two bodies would not
be identical byte-for-byte. be identical byte-for-byte.
Servers MAY support Content-Range headers [<a href="http://fakehost/test/base/#ref-RANGE" target="_blank">RANGE</a>] on GET requests, Servers MAY support Content-Range headers [<a href="#ref-RANGE">RANGE</a>] on GET requests,
but whether or not they do SHOULD be announced through the &lt;ranges&gt; but whether or not they do SHOULD be announced through the &lt;ranges&gt;
variable mentioned below in <a href="http://fakehost/test/base/#section-10" target="_blank">section 10</a>. variable mentioned below in <a href="#section-10">section 10</a>.
A successful PUT request to a document MUST result in: A successful PUT request to a document MUST result in:
@ -288,7 +288,7 @@ Table of Contents
document's new content type, document's new content type,
* its version being updated, as well as that of its parent folder * its version being updated, as well as that of its parent folder
and further ancestor folders, using a strong validator [HTTP, and further ancestor folders, using a strong validator [HTTP,
<a href="http://fakehost/test/base/#section-7.2" target="_blank">section 7.2</a>]. <a href="#section-7.2">section 7.2</a>].
The response MUST contain a strong ETag header, with the document's The response MUST contain a strong ETag header, with the document's
new version (for instance a hash of its contents) as its value. new version (for instance a hash of its contents) as its value.
@ -313,14 +313,14 @@ Table of Contents
<span>de Jong [Page 6]</span> <span>de Jong [Page 6]</span>
</pre> </pre>
<pre><a name="page-7" id="page-7" href="http://fakehost/test/base/#page-7" target="_blank"> </a> <pre><a name="page-7" id="page-7" href="#page-7"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
<span><a name="section-5" href="http://fakehost/test/base/#section-5" target="_blank">5</a>. Response codes</span> <span><a name="section-5" href="#section-5">5</a>. Response codes</span>
Response codes SHOULD be given as defined by [HTTP, <a href="http://fakehost/test/base/#section-6" target="_blank">section 6</a>] and Response codes SHOULD be given as defined by [HTTP, <a href="#section-6">section 6</a>] and
[BEARER, <a href="http://fakehost/test/base/#section-3.1" target="_blank">section 3.1</a>]. The following is a non-normative checklist [BEARER, <a href="#section-3.1">section 3.1</a>]. The following is a non-normative checklist
of status codes that are likely to occur in practice: of status codes that are likely to occur in practice:
* 500 if an internal server error occurs, * 500 if an internal server error occurs,
@ -350,13 +350,13 @@ Table of Contents
Clients SHOULD also handle the case where a response takes too long Clients SHOULD also handle the case where a response takes too long
to arrive, or where no response is received at all. to arrive, or where no response is received at all.
<span><a name="section-6" href="http://fakehost/test/base/#section-6" target="_blank">6</a>. Versioning</span> <span><a name="section-6" href="#section-6">6</a>. Versioning</span>
All successful requests MUST return an 'ETag' header [<a href="http://fakehost/test/base/#ref-HTTP" target="_blank">HTTP</a>] with, in All successful requests MUST return an 'ETag' header [<a href="#ref-HTTP">HTTP</a>] with, in
the case of GET, the current version, in the case of PUT, the new the case of GET, the current version, in the case of PUT, the new
version, and in case of DELETE, the version that was deleted. All version, and in case of DELETE, the version that was deleted. All
successful GET requests MUST return an 'Expires: 0' header. PUT and successful GET requests MUST return an 'Expires: 0' header. PUT and
DELETE requests MAY have an 'If-Match' request header [<a href="http://fakehost/test/base/#ref-COND" target="_blank">COND</a>], and DELETE requests MAY have an 'If-Match' request header [<a href="#ref-COND">COND</a>], and
MUST fail with a 412 response code if that doesn't match the MUST fail with a 412 response code if that doesn't match the
document's current version. document's current version.
@ -364,14 +364,14 @@ Table of Contents
<span>de Jong [Page 7]</span> <span>de Jong [Page 7]</span>
</pre> </pre>
<pre><a name="page-8" id="page-8" href="http://fakehost/test/base/#page-8" target="_blank"> </a> <pre><a name="page-8" id="page-8" href="#page-8"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
GET requests MAY have a comma-separated list of revisions in an GET requests MAY have a comma-separated list of revisions in an
'If-None-Match' header [<a href="http://fakehost/test/base/#ref-COND" target="_blank">COND</a>], and SHOULD be responded to with a 304 'If-None-Match' header [<a href="#ref-COND">COND</a>], and SHOULD be responded to with a 304
response if that list includes the document or folder's current response if that list includes the document or folder's current
version. A PUT request MAY have an 'If-None-Match: *' header [<a href="http://fakehost/test/base/#ref-COND" target="_blank">COND</a>], version. A PUT request MAY have an 'If-None-Match: *' header [<a href="#ref-COND">COND</a>],
in which case it MUST fail with a 412 response code if the document in which case it MUST fail with a 412 response code if the document
already exists. already exists.
@ -381,14 +381,14 @@ Table of Contents
A provider MAY offer version rollback functionality to its users, A provider MAY offer version rollback functionality to its users,
but this specification does not define the user interface for that. but this specification does not define the user interface for that.
<span><a name="section-7" href="http://fakehost/test/base/#section-7" target="_blank">7</a>. CORS headers</span> <span><a name="section-7" href="#section-7">7</a>. CORS headers</span>
All responses MUST carry CORS headers [<a href="http://fakehost/test/base/#ref-CORS" target="_blank">CORS</a>]. The server MUST also All responses MUST carry CORS headers [<a href="#ref-CORS">CORS</a>]. The server MUST also
reply to OPTIONS requests as per CORS. For GET requests, a wildcard reply to OPTIONS requests as per CORS. For GET requests, a wildcard
origin MAY be returned, but for PUT and DELETE requests, the origin MAY be returned, but for PUT and DELETE requests, the
response MUST echo back the Origin header sent by the client. response MUST echo back the Origin header sent by the client.
<span><a name="section-8" href="http://fakehost/test/base/#section-8" target="_blank">8</a>. Session description</span> <span><a name="section-8" href="#section-8">8</a>. Session description</span>
The information that a client needs to receive in order to be able The information that a client needs to receive in order to be able
to connect to a server SHOULD reach the client as described in the to connect to a server SHOULD reach the client as described in the
@ -396,12 +396,12 @@ Table of Contents
* &lt;storage_root&gt;, consisting of 'https://' followed by a server * &lt;storage_root&gt;, consisting of 'https://' followed by a server
host, and optionally a server port and a path prefix as per host, and optionally a server port and a path prefix as per
[<a href="http://fakehost/test/base/#ref-IRI" target="_blank">IRI</a>]. Examples: [<a href="#ref-IRI">IRI</a>]. Examples:
* 'https://example.com' (host only) * 'https://example.com' (host only)
* 'https://example.com:8080' (host and port) * 'https://example.com:8080' (host and port)
* 'https://example.com/path/to/storage' (host, port and * 'https://example.com/path/to/storage' (host, port and
path prefix; note there is no trailing slash) path prefix; note there is no trailing slash)
* &lt;access_token&gt; as per [<a href="http://fakehost/test/base/#ref-OAUTH" target="_blank">OAUTH</a>]. The token SHOULD be hard to * &lt;access_token&gt; as per [<a href="#ref-OAUTH">OAUTH</a>]. The token SHOULD be hard to
guess and SHOULD NOT be reused from one client to another. It guess and SHOULD NOT be reused from one client to another. It
can however be reused in subsequent interactions with the same can however be reused in subsequent interactions with the same
client, as long as that client is still trusted. Example: client, as long as that client is still trusted. Example:
@ -415,7 +415,7 @@ Table of Contents
<span>de Jong [Page 8]</span> <span>de Jong [Page 8]</span>
</pre> </pre>
<pre><a name="page-9" id="page-9" href="http://fakehost/test/base/#page-9" target="_blank"> </a> <pre><a name="page-9" id="page-9" href="#page-9"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -430,7 +430,7 @@ Table of Contents
* https://storage.example.com/bob/public/documents/ * https://storage.example.com/bob/public/documents/
* https://storage.example.com/bob/public/documents/draft.txt * https://storage.example.com/bob/public/documents/draft.txt
<span><a name="section-9" href="http://fakehost/test/base/#section-9" target="_blank">9</a>. Bearer tokens and access control</span> <span><a name="section-9" href="#section-9">9</a>. Bearer tokens and access control</span>
A bearer token represents one or more access scopes. These access A bearer token represents one or more access scopes. These access
scopes are represented as strings of the form &lt;module&gt; &lt;level&gt;, scopes are represented as strings of the form &lt;module&gt; &lt;level&gt;,
@ -452,7 +452,7 @@ Table of Contents
As a special exceptions, GET requests to a document (but not a As a special exceptions, GET requests to a document (but not a
folder) whose path starts with '/public/' are always allowed. They, folder) whose path starts with '/public/' are always allowed. They,
as well as OPTIONS requests, can be made without a bearer token. as well as OPTIONS requests, can be made without a bearer token.
Unless [<a href="http://fakehost/test/base/#ref-KERBEROS" target="_blank">KERBEROS</a>] is used (see <a href="http://fakehost/test/base/#section-10" target="_blank">section 10</a> below), all other requests Unless [<a href="#ref-KERBEROS">KERBEROS</a>] is used (see <a href="#section-10">section 10</a> below), all other requests
SHOULD present a bearer token with sufficient access scope, using a SHOULD present a bearer token with sufficient access scope, using a
header of the following form (no double quotes here): header of the following form (no double quotes here):
@ -461,21 +461,21 @@ Table of Contents
In addition, providing the access token via a HTTP query parameter In addition, providing the access token via a HTTP query parameter
for GET requests MAY be supported by the server, although its use for GET requests MAY be supported by the server, although its use
is not recommended, due to its security deficiencies; see [BEARER, is not recommended, due to its security deficiencies; see [BEARER,
<a href="http://fakehost/test/base/#section-2.3" target="_blank">section 2.3</a>]. <a href="#section-2.3">section 2.3</a>].
<span>de Jong [Page 9]</span> <span>de Jong [Page 9]</span>
</pre> </pre>
<pre><a name="page-10" id="page-10" href="http://fakehost/test/base/#page-10" target="_blank"> </a> <pre><a name="page-10" id="page-10" href="#page-10"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
<span><a name="section-10" href="http://fakehost/test/base/#section-10" target="_blank">10</a>. Application-first bearer token issuance</span> <span><a name="section-10" href="#section-10">10</a>. Application-first bearer token issuance</span>
To make a remoteStorage server available as 'the remoteStorage of To make a remoteStorage server available as 'the remoteStorage of
&lt;account&gt; at &lt;host&gt;', exactly one link of the following format &lt;account&gt; at &lt;host&gt;', exactly one link of the following format
SHOULD be added to the WebFinger record [<a href="http://fakehost/test/base/#ref-WEBFINGER" target="_blank">WEBFINGER</a>] of &lt;account&gt; at SHOULD be added to the WebFinger record [<a href="#ref-WEBFINGER">WEBFINGER</a>] of &lt;account&gt; at
&lt;host&gt;: &lt;host&gt;:
{ {
@ -490,7 +490,7 @@ Table of Contents
Here &lt;storage_root&gt; and &lt;storage_api&gt; are as per "Session Here &lt;storage_root&gt; and &lt;storage_api&gt; are as per "Session
description" above, and &lt;auth-dialog&gt; SHOULD be either null or a description" above, and &lt;auth-dialog&gt; SHOULD be either null or a
URL where an OAuth 2.0 implicit-grant flow dialog [<a href="http://fakehost/test/base/#ref-OAUTH" target="_blank">OAUTH</a>] is URL where an OAuth 2.0 implicit-grant flow dialog [<a href="#ref-OAUTH">OAUTH</a>] is
presented. presented.
If &lt;auth-dialog&gt; is a URL, the user can supply their credentials If &lt;auth-dialog&gt; is a URL, the user can supply their credentials
@ -502,7 +502,7 @@ Table of Contents
If &lt;auth-dialog&gt; is null, the client will not have a way to obtain If &lt;auth-dialog&gt; is null, the client will not have a way to obtain
an access token, and SHOULD send all requests without Authorization an access token, and SHOULD send all requests without Authorization
header, and rely on Kerberos [<a href="http://fakehost/test/base/#ref-KERBEROS" target="_blank">KERBEROS</a>] instead for requests that header, and rely on Kerberos [<a href="#ref-KERBEROS">KERBEROS</a>] instead for requests that
would normally be sent with a bearer token, but servers SHOULD NOT would normally be sent with a bearer token, but servers SHOULD NOT
impose any such access barriers for resources that would normally impose any such access barriers for resources that would normally
not require an access token. not require an access token.
@ -511,20 +511,20 @@ Table of Contents
Non-breaking examples that have been proposed so far, include a Non-breaking examples that have been proposed so far, include a
"<a href="http://tools.ietf.org/html/rfc6750#section-2.3" target="_blank">http://tools.ietf.org/html/rfc6750#section-2.3</a>" property, set to "<a href="http://tools.ietf.org/html/rfc6750#section-2.3" target="_blank">http://tools.ietf.org/html/rfc6750#section-2.3</a>" property, set to
the string value "true" if the server supports passing the bearer the string value "true" if the server supports passing the bearer
token in the URI query parameter as per section 2.3 of [<a href="http://fakehost/test/base/#ref-BEARER" target="_blank">BEARER</a>], token in the URI query parameter as per section 2.3 of [<a href="#ref-BEARER">BEARER</a>],
instead of in the request header. instead of in the request header.
<span>de Jong [Page 10]</span> <span>de Jong [Page 10]</span>
</pre> </pre>
<pre><a name="page-11" id="page-11" href="http://fakehost/test/base/#page-11" target="_blank"> </a> <pre><a name="page-11" id="page-11" href="#page-11"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
Another example is "<a href="http://tools.ietf.org/html/rfc7233" target="_blank">http://tools.ietf.org/html/rfc7233</a>" with a Another example is "<a href="http://tools.ietf.org/html/rfc7233" target="_blank">http://tools.ietf.org/html/rfc7233</a>" with a
string value of "GET" if Content-Range headers are supported for string value of "GET" if Content-Range headers are supported for
GET requests as per [<a href="http://fakehost/test/base/#ref-RANGE" target="_blank">RANGE</a>], "PUT" if they are supported for PUT GET requests as per [<a href="#ref-RANGE">RANGE</a>], "PUT" if they are supported for PUT
requests, and "GET,PUT" if supported for both. requests, and "GET,PUT" if supported for both.
Both these proposals are non-breaking extensions, since the client Both these proposals are non-breaking extensions, since the client
@ -535,7 +535,7 @@ Table of Contents
A "<a href="http://remotestorage.io/spec/web-authoring" target="_blank">http://remotestorage.io/spec/web-authoring</a>" property has been A "<a href="http://remotestorage.io/spec/web-authoring" target="_blank">http://remotestorage.io/spec/web-authoring</a>" property has been
proposed with a string value of the fully qualified domain name to proposed with a string value of the fully qualified domain name to
which web authoring content is published if the server supports web which web authoring content is published if the server supports web
authoring as per [<a href="http://fakehost/test/base/#ref-AUTHORING" target="_blank">AUTHORING</a>]. Note that this extension is a breaking authoring as per [<a href="#ref-AUTHORING">AUTHORING</a>]. Note that this extension is a breaking
extension in the sense that it divides users into "haves", whose extension in the sense that it divides users into "haves", whose
remoteStorage accounts allow them to author web content, and remoteStorage accounts allow them to author web content, and
"have-nots", whose remoteStorage account does not support this "have-nots", whose remoteStorage account does not support this
@ -547,10 +547,10 @@ Table of Contents
client_id parameter in favor of relying on the redirect_uri client_id parameter in favor of relying on the redirect_uri
parameter for client identification. parameter for client identification.
<span><a name="section-11" href="http://fakehost/test/base/#section-11" target="_blank">11</a>. Storage-first bearer token issuance</span> <span><a name="section-11" href="#section-11">11</a>. Storage-first bearer token issuance</span>
The provider MAY also present a dashboard to the user, where they The provider MAY also present a dashboard to the user, where they
have some way to add open web app manifests [<a href="http://fakehost/test/base/#ref-MANIFEST" target="_blank">MANIFEST</a>]. Adding a have some way to add open web app manifests [<a href="#ref-MANIFEST">MANIFEST</a>]. Adding a
manifest to the dashboard is considered equivalent to clicking manifest to the dashboard is considered equivalent to clicking
'accept' in the dialog of the application-first flow. Removing one 'accept' in the dialog of the application-first flow. Removing one
is considered equivalent to revoking its access token. is considered equivalent to revoking its access token.
@ -559,7 +559,7 @@ Table of Contents
field SHOULD be present in the root of such an application manifest field SHOULD be present in the root of such an application manifest
document, with entries &lt;module&gt; -&gt; '{"access": "readonly"}' for document, with entries &lt;module&gt; -&gt; '{"access": "readonly"}' for
&lt;level&gt; 'r' or '{"access": "readwrite"}' for &lt;level&gt; 'rw', as &lt;level&gt; 'r' or '{"access": "readwrite"}' for &lt;level&gt; 'rw', as
prescribed in [<a href="http://fakehost/test/base/#ref-DATASTORE" target="_blank">DATASTORE</a>]. prescribed in [<a href="#ref-DATASTORE">DATASTORE</a>].
When the user gestures they want to use a certain application whose When the user gestures they want to use a certain application whose
manifest is present on the dashboard, the dashboard SHOULD redirect manifest is present on the dashboard, the dashboard SHOULD redirect
@ -568,7 +568,7 @@ Table of Contents
<span>de Jong [Page 11]</span> <span>de Jong [Page 11]</span>
</pre> </pre>
<pre><a name="page-12" id="page-12" href="http://fakehost/test/base/#page-12" target="_blank"> </a> <pre><a name="page-12" id="page-12" href="#page-12"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -606,12 +606,12 @@ Table of Contents
debug tool, thus bypassing the need for an OAuth dance. Clients debug tool, thus bypassing the need for an OAuth dance. Clients
SHOULD NOT rely on this in production. SHOULD NOT rely on this in production.
<span><a name="section-12" href="http://fakehost/test/base/#section-12" target="_blank">12</a>. Example wire transcripts</span> <span><a name="section-12" href="#section-12">12</a>. Example wire transcripts</span>
The following examples are not normative ("\" indicates a line was The following examples are not normative ("\" indicates a line was
wrapped). wrapped).
<span><a name="section-12.1" href="http://fakehost/test/base/#section-12.1" target="_blank">12.1</a>. WebFinger</span> <span><a name="section-12.1" href="#section-12.1">12.1</a>. WebFinger</span>
In application-first, an in-browser application might issue the In application-first, an in-browser application might issue the
following request, using XMLHttpRequest and CORS: following request, using XMLHttpRequest and CORS:
@ -619,7 +619,7 @@ Table of Contents
<span>de Jong [Page 12]</span> <span>de Jong [Page 12]</span>
</pre> </pre>
<pre><a name="page-13" id="page-13" href="http://fakehost/test/base/#page-13" target="_blank"> </a> <pre><a name="page-13" id="page-13" href="#page-13"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -659,7 +659,7 @@ motestorage-04",
}] }]
} }
<span><a name="section-12.2" href="http://fakehost/test/base/#section-12.2" target="_blank">12.2</a>. OAuth dialog form</span> <span><a name="section-12.2" href="#section-12.2">12.2</a>. OAuth dialog form</span>
Once the in-browser application has discovered the server's OAuth Once the in-browser application has discovered the server's OAuth
end-point, it will typically redirect the user to this URL, in end-point, it will typically redirect the user to this URL, in
@ -670,7 +670,7 @@ motestorage-04",
<span>de Jong [Page 13]</span> <span>de Jong [Page 13]</span>
</pre> </pre>
<pre><a name="page-14" id="page-14" href="http://fakehost/test/base/#page-14" target="_blank"> </a> <pre><a name="page-14" id="page-14" href="#page-14"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -690,7 +690,7 @@ unhosted.5apps.com&amp;response_type=token HTTP/1.1
&lt;title&gt;Allow access?&lt;/title&gt; &lt;title&gt;Allow access?&lt;/title&gt;
... ...
<span><a name="section-12.3" href="http://fakehost/test/base/#section-12.3" target="_blank">12.3</a>. OAuth dialog form submission</span> <span><a name="section-12.3" href="#section-12.3">12.3</a>. OAuth dialog form submission</span>
When the user submits the form, the request would look something When the user submits the form, the request would look something
like this: like this:
@ -715,13 +715,13 @@ low
Location:https://drinks-unhosted.5apps.com/#access_token=j2YnGt\ Location:https://drinks-unhosted.5apps.com/#access_token=j2YnGt\
XjzzzHNjkd1CJxoQubA1o%3D&amp;token_type=bearer&amp;state= XjzzzHNjkd1CJxoQubA1o%3D&amp;token_type=bearer&amp;state=
<span><a name="section-12.4" href="http://fakehost/test/base/#section-12.4" target="_blank">12.4</a>. OPTIONS preflight</span> <span><a name="section-12.4" href="#section-12.4">12.4</a>. OPTIONS preflight</span>
<span>de Jong [Page 14]</span> <span>de Jong [Page 14]</span>
</pre> </pre>
<pre><a name="page-15" id="page-15" href="http://fakehost/test/base/#page-15" target="_blank"> </a> <pre><a name="page-15" id="page-15" href="#page-15"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -744,7 +744,7 @@ XjzzzHNjkd1CJxoQubA1o%3D&amp;token_type=bearer&amp;state=
Access-Control-Allow-Headers: Authorization, Content-Length, Co\ Access-Control-Allow-Headers: Authorization, Content-Length, Co\
ntent-Type, Origin, X-Requested-With, If-Match, If-None-Match ntent-Type, Origin, X-Requested-With, If-Match, If-None-Match
<span><a name="section-12.5" href="http://fakehost/test/base/#section-12.5" target="_blank">12.5</a>. Initial PUT</span> <span><a name="section-12.5" href="#section-12.5">12.5</a>. Initial PUT</span>
An initial PUT may contain an 'If-None-Match: *' header, like this: An initial PUT may contain an 'If-None-Match: *' header, like this:
@ -767,12 +767,12 @@ ntent-Type, Origin, X-Requested-With, If-Match, If-None-Match
Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a> Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a>
ETag: "1382694045000" ETag: "1382694045000"
<span><a name="section-12.6" href="http://fakehost/test/base/#section-12.6" target="_blank">12.6</a>. Subsequent PUT</span> <span><a name="section-12.6" href="#section-12.6">12.6</a>. Subsequent PUT</span>
<span>de Jong [Page 15]</span> <span>de Jong [Page 15]</span>
</pre> </pre>
<pre><a name="page-16" id="page-16" href="http://fakehost/test/base/#page-16" target="_blank"> </a> <pre><a name="page-16" id="page-16" href="#page-16"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -798,7 +798,7 @@ e.io/spec/modules/myfavoritedrinks/drink"}
Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a> Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a>
ETag: "1382694048000" ETag: "1382694048000"
<span><a name="section-12.7" href="http://fakehost/test/base/#section-12.7" target="_blank">12.7</a>. GET</span> <span><a name="section-12.7" href="#section-12.7">12.7</a>. GET</span>
A GET request would also include the bearer token, and optionally A GET request would also include the bearer token, and optionally
an If-None-Match header: an If-None-Match header:
@ -823,7 +823,7 @@ e.io/spec/modules/myfavoritedrinks/drink"}
<span>de Jong [Page 16]</span> <span>de Jong [Page 16]</span>
</pre> </pre>
<pre><a name="page-17" id="page-17" href="http://fakehost/test/base/#page-17" target="_blank"> </a> <pre><a name="page-17" id="page-17" href="#page-17"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -858,7 +858,7 @@ charset=UTF-8","Content-Length":106}}}
HTTP/1.1 404 Not Found HTTP/1.1 404 Not Found
Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a> Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a>
<span><a name="section-12.8" href="http://fakehost/test/base/#section-12.8" target="_blank">12.8</a>. DELETE</span> <span><a name="section-12.8" href="#section-12.8">12.8</a>. DELETE</span>
A DELETE request may look like this: A DELETE request may look like this:
@ -874,7 +874,7 @@ charset=UTF-8","Content-Length":106}}}
<span>de Jong [Page 17]</span> <span>de Jong [Page 17]</span>
</pre> </pre>
<pre><a name="page-18" id="page-18" href="http://fakehost/test/base/#page-18" target="_blank"> </a> <pre><a name="page-18" id="page-18" href="#page-18"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -884,7 +884,7 @@ charset=UTF-8","Content-Length":106}}}
Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a> Access-Control-Allow-Origin: <a href="https://drinks-unhosted.5apps.com/" target="_blank">https://drinks-unhosted.5apps.com</a>
ETag: "1382694048000" ETag: "1382694048000"
<span><a name="section-13" href="http://fakehost/test/base/#section-13" target="_blank">13</a>. Distributed versioning</span> <span><a name="section-13" href="#section-13">13</a>. Distributed versioning</span>
This section is non-normative, and is intended to explain some of This section is non-normative, and is intended to explain some of
the design choices concerning ETags and folder listings. At the the design choices concerning ETags and folder listings. At the
@ -925,7 +925,7 @@ charset=UTF-8","Content-Length":106}}}
<span>de Jong [Page 18]</span> <span>de Jong [Page 18]</span>
</pre> </pre>
<pre><a name="page-19" id="page-19" href="http://fakehost/test/base/#page-19" target="_blank"> </a> <pre><a name="page-19" id="page-19" href="#page-19"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -947,7 +947,7 @@ charset=UTF-8","Content-Length":106}}}
but it is up to whichever client discovers a given version but it is up to whichever client discovers a given version
conflict, to resolve it. conflict, to resolve it.
<span><a name="section-14" href="http://fakehost/test/base/#section-14" target="_blank">14</a>. Security Considerations</span> <span><a name="section-14" href="#section-14">14</a>. Security Considerations</span>
To prevent man-in-the-middle attacks, the use of https instead of To prevent man-in-the-middle attacks, the use of https instead of
http is important for both the interface itself and all end-points http is important for both the interface itself and all end-points
@ -976,7 +976,7 @@ charset=UTF-8","Content-Length":106}}}
<span>de Jong [Page 19]</span> <span>de Jong [Page 19]</span>
</pre> </pre>
<pre><a name="page-20" id="page-20" href="http://fakehost/test/base/#page-20" target="_blank"> </a> <pre><a name="page-20" id="page-20" href="#page-20"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
@ -993,7 +993,7 @@ charset=UTF-8","Content-Length":106}}}
The server SHOULD also detect and stop denial-of-service attacks The server SHOULD also detect and stop denial-of-service attacks
that aim to overwhelm its interface with too much traffic. that aim to overwhelm its interface with too much traffic.
<span><a name="section-15" href="http://fakehost/test/base/#section-15" target="_blank">15</a>. IANA Considerations</span> <span><a name="section-15" href="#section-15">15</a>. IANA Considerations</span>
This document registers the 'remotestorage' link relation, as well This document registers the 'remotestorage' link relation, as well
as the following WebFinger properties: as the following WebFinger properties:
@ -1003,7 +1003,7 @@ charset=UTF-8","Content-Length":106}}}
* "<a href="http://tools.ietf.org/html/rfc7233" target="_blank">http://tools.ietf.org/html/rfc7233</a>" * "<a href="http://tools.ietf.org/html/rfc7233" target="_blank">http://tools.ietf.org/html/rfc7233</a>"
* "<a href="http://remotestorage.io/spec/web-authoring" target="_blank">http://remotestorage.io/spec/web-authoring</a>" * "<a href="http://remotestorage.io/spec/web-authoring" target="_blank">http://remotestorage.io/spec/web-authoring</a>"
<span><a name="section-16" href="http://fakehost/test/base/#section-16" target="_blank">16</a>. Acknowledgements</span> <span><a name="section-16" href="#section-16">16</a>. Acknowledgements</span>
The authors would like to thank everybody who contributed to the The authors would like to thank everybody who contributed to the
development of this protocol, including Kenny Bentley, Javier Diaz, development of this protocol, including Kenny Bentley, Javier Diaz,
@ -1016,88 +1016,88 @@ charset=UTF-8","Content-Length":106}}}
Rick van Rein, Mark Nottingham, Julian Reschke, and Markus Rick van Rein, Mark Nottingham, Julian Reschke, and Markus
Lanthaler, among many others. Lanthaler, among many others.
<span><a name="section-17" href="http://fakehost/test/base/#section-17" target="_blank">17</a>. References</span> <span><a name="section-17" href="#section-17">17</a>. References</span>
<span><a name="section-17.1" href="http://fakehost/test/base/#section-17.1" target="_blank">17.1</a>. Normative References</span> <span><a name="section-17.1" href="#section-17.1">17.1</a>. Normative References</span>
[<a name="ref-WORDS" id="ref-WORDS" target="_blank">WORDS</a>] [<a name="ref-WORDS" id="ref-WORDS">WORDS</a>]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", <a href="http://fakehost/test/base/bcp14" target="_blank">BCP 14</a>, <a href="http://fakehost/test/base/rfc2119" target="_blank">RFC 2119</a>, March 1997. Levels", <a href="http://fakehost/test/base/bcp14" target="_blank">BCP 14</a>, <a href="http://fakehost/test/base/rfc2119" target="_blank">RFC 2119</a>, March 1997.
<span>de Jong [Page 20]</span> <span>de Jong [Page 20]</span>
</pre> </pre>
<pre><a name="page-21" id="page-21" href="http://fakehost/test/base/#page-21" target="_blank"> </a> <pre><a name="page-21" id="page-21" href="#page-21"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
[<a name="ref-IRI" id="ref-IRI" target="_blank">IRI</a>] [<a name="ref-IRI" id="ref-IRI">IRI</a>]
Duerst, M., "Internationalized Resource Identifiers (IRIs)", Duerst, M., "Internationalized Resource Identifiers (IRIs)",
<a href="http://fakehost/test/base/rfc3987" target="_blank">RFC 3987</a>, January 2005. <a href="http://fakehost/test/base/rfc3987" target="_blank">RFC 3987</a>, January 2005.
[<a name="ref-WEBFINGER" id="ref-WEBFINGER" target="_blank">WEBFINGER</a>] [<a name="ref-WEBFINGER" id="ref-WEBFINGER">WEBFINGER</a>]
Jones, P., Salguerio, G., Jones, M, and Smarr, J., Jones, P., Salguerio, G., Jones, M, and Smarr, J.,
"WebFinger", <a href="http://fakehost/test/base/rfc7033" target="_blank">RFC7033</a>, September 2013. "WebFinger", <a href="http://fakehost/test/base/rfc7033" target="_blank">RFC7033</a>, September 2013.
[<a name="ref-OAUTH" id="ref-OAUTH" target="_blank">OAUTH</a>] [<a name="ref-OAUTH" id="ref-OAUTH">OAUTH</a>]
"<a href="http://fakehost/test/base/#section-4.2" target="_blank">Section 4.2</a>: Implicit Grant", in: Hardt, D. (ed), "The OAuth "<a href="#section-4.2">Section 4.2</a>: Implicit Grant", in: Hardt, D. (ed), "The OAuth
2.0 Authorization Framework", <a href="http://fakehost/test/base/rfc6749" target="_blank">RFC6749</a>, October 2012. 2.0 Authorization Framework", <a href="http://fakehost/test/base/rfc6749" target="_blank">RFC6749</a>, October 2012.
<span><a name="section-17.2" href="http://fakehost/test/base/#section-17.2" target="_blank">17.2</a>. Informative References</span> <span><a name="section-17.2" href="#section-17.2">17.2</a>. Informative References</span>
[<a name="ref-HTTPS" id="ref-HTTPS" target="_blank">HTTPS</a>] [<a name="ref-HTTPS" id="ref-HTTPS">HTTPS</a>]
Rescorla, E., "HTTP Over TLS", <a href="http://fakehost/test/base/rfc2818" target="_blank">RFC2818</a>, May 2000. Rescorla, E., "HTTP Over TLS", <a href="http://fakehost/test/base/rfc2818" target="_blank">RFC2818</a>, May 2000.
[<a name="ref-HTTP" id="ref-HTTP" target="_blank">HTTP</a>] [<a name="ref-HTTP" id="ref-HTTP">HTTP</a>]
Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1): Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1):
Semantics and Content", <a href="http://fakehost/test/base/rfc7231" target="_blank">RFC7231</a>, June 2014. Semantics and Content", <a href="http://fakehost/test/base/rfc7231" target="_blank">RFC7231</a>, June 2014.
[<a name="ref-COND" id="ref-COND" target="_blank">COND</a>] [<a name="ref-COND" id="ref-COND">COND</a>]
Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1): Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1):
Conditional Requests", <a href="http://fakehost/test/base/rfc7232" target="_blank">RFC7232</a>, June 2014. Conditional Requests", <a href="http://fakehost/test/base/rfc7232" target="_blank">RFC7232</a>, June 2014.
[<a name="ref-RANGE" id="ref-RANGE" target="_blank">RANGE</a>] [<a name="ref-RANGE" id="ref-RANGE">RANGE</a>]
Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1): Fielding et al., "Hypertext Transfer Protocol (HTTP/1.1):
Conditional Requests", <a href="http://fakehost/test/base/rfc7233" target="_blank">RFC7233</a>, June 2014. Conditional Requests", <a href="http://fakehost/test/base/rfc7233" target="_blank">RFC7233</a>, June 2014.
[<a name="ref-SPDY" id="ref-SPDY" target="_blank">SPDY</a>] [<a name="ref-SPDY" id="ref-SPDY">SPDY</a>]
Mark Belshe, Roberto Peon, "SPDY Protocol - Draft 3.1", <a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1" target="_blank">http://</a> Mark Belshe, Roberto Peon, "SPDY Protocol - Draft 3.1", <a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1" target="_blank">http://</a>
<a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1" target="_blank">www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1</a>, <a href="http://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1" target="_blank">www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1</a>,
September 2013. September 2013.
[<a name="ref-JSON-LD" id="ref-JSON-LD" target="_blank">JSON-LD</a>] [<a name="ref-JSON-LD" id="ref-JSON-LD">JSON-LD</a>]
M. Sporny, G. Kellogg, M. Lanthaler, "JSON-LD 1.0", W3C M. Sporny, G. Kellogg, M. Lanthaler, "JSON-LD 1.0", W3C
Proposed Recommendation, Proposed Recommendation,
<a href="http://www.w3.org/TR/2014/REC-json-ld-20140116/" target="_blank">http://www.w3.org/TR/2014/REC-json-ld-20140116/</a>, January 2014. <a href="http://www.w3.org/TR/2014/REC-json-ld-20140116/" target="_blank">http://www.w3.org/TR/2014/REC-json-ld-20140116/</a>, January 2014.
[<a name="ref-CORS" id="ref-CORS" target="_blank">CORS</a>] [<a name="ref-CORS" id="ref-CORS">CORS</a>]
van Kesteren, Anne (ed), "Cross-Origin Resource Sharing -- van Kesteren, Anne (ed), "Cross-Origin Resource Sharing --
W3C Candidate Recommendation 29 January 2013", W3C Candidate Recommendation 29 January 2013",
<span>de Jong [Page 21]</span> <span>de Jong [Page 21]</span>
</pre> </pre>
<pre><a name="page-22" id="page-22" href="http://fakehost/test/base/#page-22" target="_blank"> </a> <pre><a name="page-22" id="page-22" href="#page-22"> </a>
<span>Internet-Draft remoteStorage December 2014</span> <span>Internet-Draft remoteStorage December 2014</span>
<a href="http://www.w3.org/TR/cors/" target="_blank">http://www.w3.org/TR/cors/</a>, January 2013. <a href="http://www.w3.org/TR/cors/" target="_blank">http://www.w3.org/TR/cors/</a>, January 2013.
[<a name="ref-MANIFEST" id="ref-MANIFEST" target="_blank">MANIFEST</a>] [<a name="ref-MANIFEST" id="ref-MANIFEST">MANIFEST</a>]
Mozilla Developer Network (ed), "App manifest -- Revision Mozilla Developer Network (ed), "App manifest -- Revision
330541", <a href="https://developer.mozilla.org/en-" target="_blank">https://developer.mozilla.org/en-</a> 330541", <a href="https://developer.mozilla.org/en-" target="_blank">https://developer.mozilla.org/en-</a>
US/Apps/Build/Manifest$revision/566677, April 2014. US/Apps/Build/Manifest$revision/566677, April 2014.
[<a name="ref-DATASTORE" id="ref-DATASTORE" target="_blank">DATASTORE</a>] [<a name="ref-DATASTORE" id="ref-DATASTORE">DATASTORE</a>]
"WebAPI/DataStore", MozillaWiki, retrieved May 2014. "WebAPI/DataStore", MozillaWiki, retrieved May 2014.
<a href="https://wiki.mozilla.org/WebAPI/DataStore#Manifest" target="_blank">https://wiki.mozilla.org/WebAPI/DataStore#Manifest</a> <a href="https://wiki.mozilla.org/WebAPI/DataStore#Manifest" target="_blank">https://wiki.mozilla.org/WebAPI/DataStore#Manifest</a>
[<a name="ref-KERBEROS" id="ref-KERBEROS" target="_blank">KERBEROS</a>] [<a name="ref-KERBEROS" id="ref-KERBEROS">KERBEROS</a>]
C. Neuman et al., "The Kerberos Network Authentication Service C. Neuman et al., "The Kerberos Network Authentication Service
(V5)", <a href="http://fakehost/test/base/rfc4120" target="_blank">RFC4120</a>, July 2005. (V5)", <a href="http://fakehost/test/base/rfc4120" target="_blank">RFC4120</a>, July 2005.
[<a name="ref-BEARER" id="ref-BEARER" target="_blank">BEARER</a>] [<a name="ref-BEARER" id="ref-BEARER">BEARER</a>]
M. Jones, D. Hardt, "The OAuth 2.0 Authorization Framework: M. Jones, D. Hardt, "The OAuth 2.0 Authorization Framework:
Bearer Token Usage", <a href="http://fakehost/test/base/rfc6750" target="_blank">RFC6750</a>, October 2012. Bearer Token Usage", <a href="http://fakehost/test/base/rfc6750" target="_blank">RFC6750</a>, October 2012.
@ -1106,7 +1106,7 @@ charset=UTF-8","Content-Length":106}}}
September 2014. <a href="https://github.com/michielbdejong/resite/wiki" target="_blank">https://github.com/michielbdejong/resite/wiki</a> September 2014. <a href="https://github.com/michielbdejong/resite/wiki" target="_blank">https://github.com/michielbdejong/resite/wiki</a>
/Using-remoteStorage-for-web-authoring /Using-remoteStorage-for-web-authoring
<span><a name="section-18" href="http://fakehost/test/base/#section-18" target="_blank">18</a>. Authors' addresses</span> <span><a name="section-18" href="#section-18">18</a>. Authors' addresses</span>
Michiel B. de Jong Michiel B. de Jong
IndieHosters IndieHosters

738
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@ -0,0 +1,738 @@
<article><div id="readability-page-1">
<div id="contents">
<p>
Contents
</p>
<ul>
<li>
<a href="#evolve-shared-mutable-history" id="id4">Evolve: Shared Mutable History</a>
<ul>
<li>
<a href="#sharing-with-a-single-developer" id="id5">Sharing with a single developer</a>
<ul>
<li>
<a href="#publishing-and-non-publishing-repositories" id="id6">Publishing and non-publishing repositories</a>
</li>
<li>
<a href="#setting-up" id="id7">Setting up</a>
</li>
<li>
<a href="#example-1-amend-a-shared-changeset" id="id8">Example 1: Amend a shared changeset</a>
</li>
<li>
<a href="#example-2-amend-again-locally" id="id9">Example 2: Amend again, locally</a>
</li>
</ul>
</li>
<li>
<a href="#sharing-with-multiple-developers-code-review" id="id10">Sharing with multiple developers: code review</a>
<ul>
<li>
<a href="#id2" id="id11">Setting up</a>
</li>
<li>
<a href="#example-3-alice-commits-and-amends-a-draft-fix" id="id12">Example 3: Alice commits and amends a draft fix</a>
</li>
<li>
<a href="#example-4-bob-implements-and-publishes-a-new-feature" id="id13">Example 4: Bob implements and publishes a new feature</a>
</li>
<li>
<a href="#example-5-alice-integrates-and-publishes" id="id14">Example 5: Alice integrates and publishes</a>
</li>
</ul>
</li>
<li>
<a href="#getting-into-trouble-with-shared-mutable-history" id="id15">Getting into trouble with shared mutable history</a>
<ul>
<li>
<a href="#id3" id="id16">Setting up</a>
</li>
<li>
<a href="#example-6-divergent-changesets" id="id17">Example 6: Divergent changesets</a>
</li>
<li>
<a href="#phase-divergence-when-a-rewritten-changeset-is-made-public" id="id18">Phase-divergence: when a rewritten changeset is made public</a>
</li>
</ul>
</li>
<li>
<a href="#conclusion" id="id19">Conclusion</a>
</li>
</ul>
</li>
</ul>
</div>
<p>
Once you have mastered the art of mutable history in a single repository (see the <a href="http://fakehost/test/base/user-guide.html" target="_blank">user guide</a>), you can move up to the next level: <em>shared</em> mutable history. <tt><span>evolve</span></tt> lets you push and pull draft changesets between repositories along with their obsolescence markers. This opens up a number of interesting possibilities.
</p>
<p>
The simplest scenario is a single developer working across two computers. Say you’re working on code that must be tested on a remote test server, probably in a rack somewhere, only accessible by SSH, and running an “enterprise-grade” (out-of-date) OS. But you probably prefer to write code locally: everything is setup the way you like it, and you can use your preferred editor, IDE, merge/diff tools, etc.
</p>
<p>
Traditionally, your options are limited: either
</p>
<blockquote>
<div>
<ul>
<li>(ab)use your source control system by committing half-working code in order to get it onto the remote test server, or
</li>
<li>go behind source control’s back by using <tt><span>rsync</span></tt> (or similar) to transfer your code back-and-forth until it is ready to commit
</li>
</ul>
</div>
</blockquote>
<p>
The former is less bad with distributed version control systems like Mercurial, but it’s still far from ideal. (One important version control “best practice” is that every commit should make things just a little bit better, i.e. you should never commit code that is worse than what came before.) The latter, avoiding version control entirely, means that you’re walking a tightrope without a safety net. One accidental <tt><span>rsync</span></tt> in the wrong direction could destroy hours of work.
</p>
<p>
Using Mercurial with <tt><span>evolve</span></tt> to share mutable history solves these problems. As with single-repository <tt><span>evolve</span></tt>, you can commit whenever the code is demonstrably better, even if all the tests aren’t passing yet—just <tt><span>hg</span> <span>amend</span></tt> when they are. And you can transfer those half-baked changesets between repositories to try things out on your test server before anything is carved in stone.
</p>
<p>
A less common scenario is multiple developers sharing mutable history, typically for code review. We’ll cover this scenario later. First, we will cover single-user sharing.
</p>
<div id="sharing-with-a-single-developer">
<h2>
<a href="#id5">Sharing with a single developer</a><a href="#sharing-with-a-single-developer" title="Permalink to this headline"></a>
</h2>
<div id="publishing-and-non-publishing-repositories">
<h3>
<a href="#id6">Publishing and non-publishing repositories</a><a href="#publishing-and-non-publishing-repositories" title="Permalink to this headline"></a>
</h3>
<p>
The key to shared mutable history is to keep your changesets in <em>draft</em> phase as you pass them around. Recall that by default, <tt><span>hg</span> <span>push</span></tt> promotes changesets from <em>draft</em> to <em>public</em>, and public changesets are immutable. You can change this behaviour by reconfiguring the <em>remote</em> repository so that it is non-publishing. (Short version: set <tt><span>phases.publish</span></tt> to <tt><span>false</span></tt>. Long version follows.)
</p>
</div>
<div id="setting-up">
<h3>
<a href="#id7">Setting up</a><a href="#setting-up" title="Permalink to this headline"></a>
</h3>
<p>
We’ll work through an example with three local repositories, although in the real world they’d most likely be on three different computers. First, the <tt><span>public</span></tt> repository is where tested, polished changesets live, and it is where you synchronize with the rest of your team.
</p>
<p>
We’ll need two clones where work gets done, <tt><span>test-repo</span></tt> and <tt><span>dev-repo</span></tt>:
</p>
<div>
<pre>$ hg clone public test-repo
updating to branch default
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg clone test-repo dev-repo
updating to branch default
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
<p>
<tt><span>dev-repo</span></tt> is your local machine, with GUI merge tools and IDEs and everything configured just the way you like it. <tt><span>test-repo</span></tt> is the test server in a rack somewhere behind SSH. So for the most part, we’ll develop in <tt><span>dev-repo</span></tt>, push to <tt><span>test-repo</span></tt>, test and polish there, and push to <tt><span>public</span></tt>.
</p>
<p>
The key to shared mutable history is to make the target repository, in this case <tt><span>test-repo</span></tt>, non-publishing. And, of course, we have to enable the <tt><span>evolve</span></tt> extension in both <tt><span>test-repo</span></tt> and <tt><span>dev-repo</span></tt>.
</p>
<p>
First, edit the configuration for <tt><span>test-repo</span></tt>:
</p>
<div>
<pre>$ hg -R test-repo config --edit --local
</pre>
</div>
<p>
and add
</p>
<div>
<pre>[phases]
publish = false
[extensions]
evolve =
</pre>
</div>
<p>
Then edit the configuration for <tt><span>dev-repo</span></tt>:
</p>
<div>
<pre>$ hg -R dev-repo config --edit --local
</pre>
</div>
<p>
and add
</p>
<p>
Keep in mind that in real life, these repositories would probably be on separate computers, so you’d have to login to each one to configure each repository.
</p>
<p>
To start things off, let’s make one public, immutable changeset:
</p>
<div>
<pre>$ cd test-repo
$ echo 'my new project' &gt; file1
$ hg add file1
$ hg commit -m 'create new project'
$ hg push
[...]
added 1 changesets with 1 changes to 1 files
</pre>
</div>
<p>
and pull that into the development repository:
</p>
<div>
<pre>$ cd ../dev-repo
$ hg pull -u
[...]
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
</div>
<div id="example-2-amend-again-locally">
<h3>
<a href="#id9">Example 2: Amend again, locally</a><a href="#example-2-amend-again-locally" title="Permalink to this headline"></a>
</h3>
<p>
This process can repeat. Perhaps you figure out a more elegant fix to the bug, and want to mutate history so nobody ever knows you had a less-than-perfect idea. We’ll implement it locally in <tt><span>dev-repo</span></tt> and push to <tt><span>test-repo</span></tt>:
</p>
<div>
<pre>$ echo 'Fix, fix, and fix.' &gt; file1
$ hg amend
$ hg push
</pre>
</div>
<p>
This time around, the temporary amend commit is in <tt><span>dev-repo</span></tt>, and it is not transferred to <tt><span>test-repo</span></tt>—the same as before, just in the opposite direction. Figure 4 shows the two repositories after amending in <tt><span>dev-repo</span></tt> and pushing to <tt><span>test-repo</span></tt>.
</p>
<blockquote>
<p>
[figure SG04: each repo has one temporary amend commit, but they’re different in each one]
</p>
</blockquote>
<p>
Let’s hop over to <tt><span>test-repo</span></tt> to test the more elegant fix:
</p>
<div>
<pre>$ cd ../test-repo
$ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
<p>
This time, all the tests pass, so no further amending is required. This bug fix is finished, so we push it to the public repository:
</p>
<div>
<pre>$ hg push
[...]
added 1 changesets with 1 changes to 1 files
</pre>
</div>
<p>
Note that only one changeset—the final version, after two amendments—was actually pushed. Again, Mercurial doesn’t transfer hidden changesets on push and pull.
</p>
<p>
So the picture in <tt><span>public</span></tt> is much simpler than in either <tt><span>dev-repo</span></tt> or <tt><span>test-repo</span></tt>. Neither of our missteps nor our amendments are publicly visible, just the final, beautifully polished changeset:
</p>
<blockquote>
<p>
[figure SG05: public repo with rev 0:0dc9, 1:de61, both public]
</p>
</blockquote>
<p>
There is one important step left to do. Because we pushed from <tt><span>test-repo</span></tt> to <tt><span>public</span></tt>, the pushed changeset is in <em>public</em> phase in those two repositories. But <tt><span>dev-repo</span></tt> has been out-of-the-loop; changeset de61 is still <em>draft</em> there. If we’re not careful, we might mutate history in <tt><span>dev-repo</span></tt>, obsoleting a changeset that is already public. Let’s avoid that situation for now by pushing up to <tt><span>dev-repo</span></tt>:
</p>
<div>
<pre>$ hg push ../dev-repo
pushing to ../dev-repo
searching for changes
no changes found
</pre>
</div>
<p>
Even though no <em>changesets</em> were pushed, Mercurial still pushed obsolescence markers and phase changes to <tt><span>dev-repo</span></tt>.
</p>
<p>
A final note: since this fix is now <em>public</em>, it is immutable. It’s no longer possible to amend it:
</p>
<div>
<pre>$ hg amend -m 'fix bug 37'
abort: cannot amend public changesets
</pre>
</div>
<p>
This is, after all, the whole point of Mercurial’s phases: to prevent rewriting history that has already been published.
</p>
</div>
</div>
<div id="sharing-with-multiple-developers-code-review">
<h2>
<a href="#id10">Sharing with multiple developers: code review</a><a href="#sharing-with-multiple-developers-code-review" title="Permalink to this headline"></a>
</h2>
<p>
Now that you know how to share your own mutable history across multiple computers, you might be wondering if it makes sense to share mutable history with others. It does, but you have to be careful, stay alert, and <em>communicate</em> with your peers.
</p>
<p>
Code review is a good use case for sharing mutable history across multiple developers: Alice commits a draft changeset, submits it for review, and amends her changeset until her reviewer is satisfied. Meanwhile, Bob is also committing draft changesets for review, amending until his reviewer is satisfied. Once a particular changeset passes review, the respective author (Alice or Bob) pushes it to the public (publishing) repository.
</p>
<p>
Incidentally, the reviewers here can be anyone: maybe Bob and Alice review each other’s work; maybe the same third party reviews both; or maybe they pick different experts to review their work on different parts of a large codebase. Similarly, it doesn’t matter if reviews are conducted in person, by email, or by carrier pigeon. Code review is outside of the scope of Mercurial, so all we’re looking at here is the mechanics of committing, amending, pushing, and pulling.
</p>
<div id="id2">
<h3>
<a href="#id11">Setting up</a><a href="#id2" title="Permalink to this headline"></a>
</h3>
<p>
To demonstrate, let’s start with the <tt><span>public</span></tt> repository as we left it in the last example, with two immutable changesets (figure 5 above). We’ll clone a <tt><span>review</span></tt> repository from it, and then Alice and Bob will both clone from <tt><span>review</span></tt>.
</p>
<div>
<pre>$ hg clone public review
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg clone review alice
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg clone review bob
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
<p>
We need to configure Alice’s and Bob’s working repositories to enable <tt><span>evolve</span></tt>. First, edit Alice’s configuration with
</p>
<div>
<pre>$ hg -R alice config --edit --local
</pre>
</div>
<p>
and add
</p>
<p>
Then edit Bob’s repository configuration:
</p>
<div>
<pre>$ hg -R bob config --edit --local
</pre>
</div>
<p>
and add the same text.
</p>
</div>
<div id="example-3-alice-commits-and-amends-a-draft-fix">
<h3>
<a href="#id12">Example 3: Alice commits and amends a draft fix</a><a href="#example-3-alice-commits-and-amends-a-draft-fix" title="Permalink to this headline"></a>
</h3>
<p>
We’ll follow Alice working on a bug fix. We’re going to use bookmarks to make it easier to understand multiple branch heads in the <tt><span>review</span></tt> repository, so Alice starts off by creating a bookmark and committing her first attempt at a fix:
</p>
<div>
<pre>$ hg bookmark bug15
$ echo 'fix' &gt; file2
$ hg commit -A -u alice -m 'fix bug 15 (v1)'
adding file2
</pre>
</div>
<p>
Note the unorthodox “(v1)” in the commit message. We’re just using that to make this tutorial easier to follow; it’s not something we’d recommend in real life.
</p>
<p>
Of course Alice wouldn’t commit unless her fix worked to her satisfaction, so it must be time to solicit a code review. She does this by pushing to the <tt><span>review</span></tt> repository:
</p>
<div>
<pre>$ hg push -B bug15
[...]
added 1 changesets with 1 changes to 1 files
exporting bookmark bug15
</pre>
</div>
<p>
(The use of <tt><span>-B</span></tt> is important to ensure that we only push the bookmarked head, and that the bookmark itself is pushed. See this <a href="http://mercurial.aragost.com/kick-start/en/bookmarks/" target="_blank">guide to bookmarks</a>, especially the <a href="http://mercurial.aragost.com/kick-start/en/bookmarks/#sharing-bookmarks" target="_blank">Sharing Bookmarks</a> section, if you’re not familiar with bookmarks.)
</p>
<p>
Some time passes, and Alice receives her code review. As a result, Alice revises her fix and submits it for a second review:
</p>
<div>
<pre>$ echo 'Fix.' &gt; file2
$ hg amend -m 'fix bug 15 (v2)'
$ hg push
[...]
added 1 changesets with 1 changes to 1 files (+1 heads)
updating bookmark bug15
</pre>
</div>
<p>
Figure 6 shows the state of the <tt><span>review</span></tt> repository at this point.
</p>
<blockquote>
<p>
[figure SG06: rev 2:fn1e is Alice’s obsolete v1, rev 3:cbdf is her v2; both children of rev 1:de61]
</p>
</blockquote>
<p>
After a busy morning of bug fixing, Alice stops for lunch. Let’s see what Bob has been up to.
</p>
</div>
<div id="example-4-bob-implements-and-publishes-a-new-feature">
<h3>
<a href="#id13">Example 4: Bob implements and publishes a new feature</a><a href="#example-4-bob-implements-and-publishes-a-new-feature" title="Permalink to this headline"></a>
</h3>
<p>
Meanwhile, Bob has been working on a new feature. Like Alice, he’ll use a bookmark to track his work, and he’ll push that bookmark to the <tt><span>review</span></tt> repository, so that reviewers know which changesets to review.
</p>
<div>
<pre>$ cd ../bob
$ echo 'stuff' &gt; file1
$ hg bookmark featureX
$ hg commit -u bob -m 'implement feature X (v1)' # rev 4:1636
$ hg push -B featureX
[...]
added 1 changesets with 1 changes to 1 files (+1 heads)
exporting bookmark featureX
</pre>
</div>
<p>
When Bob receives his code review, he improves his implementation a bit, amends, and submits the resulting changeset for review:
</p>
<div>
<pre>$ echo 'do stuff' &gt; file1
$ hg amend -m 'implement feature X (v2)' # rev 5:0eb7
$ hg push
[...]
added 1 changesets with 1 changes to 1 files (+1 heads)
updating bookmark featureX
</pre>
</div>
<p>
Unfortunately, that still doesn’t pass muster. Bob’s reviewer insists on proper capitalization and punctuation.
</p>
<div>
<pre>$ echo 'Do stuff.' &gt; file1
$ hg amend -m 'implement feature X (v3)' # rev 6:540b
</pre>
</div>
<p>
On the bright side, the second review said, “Go ahead and publish once you fix that.” So Bob immediately publishes his third attempt:
</p>
<div>
<pre>$ hg push ../public
[...]
added 1 changesets with 1 changes to 1 files
</pre>
</div>
<p>
It’s not enough just to update <tt><span>public</span></tt>, though! Other people also use the <tt><span>review</span></tt> repository, and right now it doesn’t have Bob’s latest amendment (“v3”, revision 6:540b), nor does it know that the precursor of that changeset (“v2”, revision 5:0eb7) is obsolete. Thus, Bob pushes to <tt><span>review</span></tt> as well:
</p>
<div>
<pre>$ hg push ../review
[...]
added 1 changesets with 1 changes to 1 files (+1 heads)
updating bookmark featureX
</pre>
</div>
<p>
Figure 7 shows the result of Bob’s work in both <tt><span>review</span></tt> and <tt><span>public</span></tt>.
</p>
<blockquote>
<p>
[figure SG07: review includes Alice’s draft work on bug 15, as well as Bob’s v1, v2, and v3 changes for feature X: v1 and v2 obsolete, v3 public. public contains only the final, public implementation of feature X]
</p>
</blockquote>
<p>
Incidentally, it’s important that Bob push to <tt><span>public</span></tt> <em>before</em> <tt><span>review</span></tt>. If he pushed to <tt><span>review</span></tt> first, then revision 6:540b would still be in <em>draft</em> phase in <tt><span>review</span></tt>, but it would be <em>public</em> in both Bob’s local repository and the <tt><span>public</span></tt> repository. That could lead to confusion at some point, which is easily avoided by pushing first to <tt><span>public</span></tt>.
</p>
</div>
<div id="example-5-alice-integrates-and-publishes">
<h3>
<a href="#id14">Example 5: Alice integrates and publishes</a><a href="#example-5-alice-integrates-and-publishes" title="Permalink to this headline"></a>
</h3>
<p>
Finally, Alice gets back from lunch and sees that the carrier pigeon with her second review has arrived (or maybe it’s in her email inbox). Alice’s reviewer approved her amended changeset, so she pushes it to <tt><span>public</span></tt>:
</p>
<div>
<pre>$ hg push ../public
[...]
remote has heads on branch 'default' that are not known locally: 540ba8f317e6
abort: push creates new remote head cbdfbd5a5db2!
(pull and merge or see "hg help push" for details about pushing new heads)
</pre>
</div>
<p>
Oops! Bob has won the race to push first to <tt><span>public</span></tt>. So Alice needs to integrate with Bob: let’s pull his changeset(s) and see what the branch heads are.
</p>
<div>
<pre>$ hg pull ../public
[...]
added 1 changesets with 1 changes to 1 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
$ hg log -G -q -r 'head()' --template '{rev}:{node|short} ({author})\n'
o 5:540ba8f317e6 (bob)
|
| @ 4:cbdfbd5a5db2 (alice)
|/
</pre>
</div>
<p>
We’ll assume Alice and Bob are perfectly comfortable with rebasing changesets. (After all, they’re already using mutable history in the form of <tt><span>amend</span></tt>.) So Alice rebases her changeset on top of Bob’s and publishes the result:
</p>
<div>
<pre>$ hg rebase -d 5
$ hg push ../public
[...]
added 1 changesets with 1 changes to 1 files
$ hg push ../review
[...]
added 1 changesets with 0 changes to 0 files
updating bookmark bug15
</pre>
</div>
<p>
The result, in both <tt><span>review</span></tt> and <tt><span>public</span></tt> repositories, is shown in figure 8.
</p>
<blockquote>
<p>
[figure SG08: review shows v1 and v2 of Alice’s fix, then v1, v2, v3 of Bob’s feature, finally Alice’s fix rebased onto Bob’s. public just shows the final public version of each changeset]
</p>
</blockquote>
</div>
</div>
<div id="getting-into-trouble-with-shared-mutable-history">
<h2>
<a href="#id15">Getting into trouble with shared mutable history</a><a href="#getting-into-trouble-with-shared-mutable-history" title="Permalink to this headline"></a>
</h2>
<p>
Mercurial with <tt><span>evolve</span></tt> is a powerful tool, and using powerful tools can have consequences. (You can cut yourself badly with a sharp knife, but every competent chef keeps several around. Ever try to chop onions with a spoon?)
</p>
<p>
In the user guide, we saw examples of <em>unstbale</em> changesets, which are the most common type of troubled changeset. (Recall that a non-obsolete changeset with obsolete ancestors is an orphan.)
</p>
<p>
Two other types of troubles can happen: <em>divergent</em> and <em>bumped</em> changesets. Both are more likely with shared mutable history, especially mutable history shared by multiple developers.
</p>
<div id="id3">
<h3>
<a href="#id16">Setting up</a><a href="#id3" title="Permalink to this headline"></a>
</h3>
<p>
For these examples, we’re going to use a slightly different workflow: as before, Alice and Bob share a <tt><span>public</span></tt> repository. But this time there is no <tt><span>review</span></tt> repository. Instead, Alice and Bob put on their cowboy hats, throw good practice to the wind, and pull directly from each other’s working repositories.
</p>
<p>
So we throw away everything except <tt><span>public</span></tt> and reclone:
</p>
<div>
<pre>$ rm -rf review alice bob
$ hg clone public alice
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg clone public bob
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
<p>
Once again we have to configure their repositories: enable <tt><span>evolve</span></tt> and (since Alice and Bob will be pulling directly from each other) make their repositories non-publishing. Edit Alice’s configuration:
</p>
<div>
<pre>$ hg -R alice config --edit --local
</pre>
</div>
<p>
and add
</p>
<div>
<pre>[extensions]
rebase =
evolve =
[phases]
publish = false
</pre>
</div>
<p>
Then edit Bob’s repository configuration:
</p>
<div>
<pre>$ hg -R bob config --edit --local
</pre>
</div>
<p>
and add the same text.
</p>
</div>
<div id="example-6-divergent-changesets">
<h3>
<a href="#id17">Example 6: Divergent changesets</a><a href="#example-6-divergent-changesets" title="Permalink to this headline"></a>
</h3>
<p>
When an obsolete changeset has two successors, those successors are <em>divergent</em>. One way to get into such a situation is by failing to communicate with your teammates. Let’s see how that might happen.
</p>
<p>
First, we’ll have Bob commit a bug fix that could still be improved:
</p>
<div>
<pre>$ cd bob
$ echo 'pretty good fix' &gt;&gt; file1
$ hg commit -u bob -m 'fix bug 24 (v1)' # rev 4:2fe6
</pre>
</div>
<p>
Since Alice and Bob are now in cowboy mode, Alice pulls Bob’s draft changeset and amends it herself.
</p>
<div>
<pre>$ cd ../alice
$ hg pull -u ../bob
[...]
added 1 changesets with 1 changes to 1 files
$ echo 'better fix (alice)' &gt;&gt; file1
$ hg amend -u alice -m 'fix bug 24 (v2 by alice)'
</pre>
</div>
<p>
But Bob has no idea that Alice just did this. (See how important good communication is?) So he implements a better fix of his own:
</p>
<div>
<pre>$ cd ../bob
$ echo 'better fix (bob)' &gt;&gt; file1
$ hg amend -u bob -m 'fix bug 24 (v2 by bob)' # rev 6:a360
</pre>
</div>
<p>
At this point, the divergence exists, but only in theory: Bob’s original changeset, 4:2fe6, is obsolete and has two successors. But those successors are in different repositories, so the trouble is not visible to anyone yet. It will be as soon as Bob pulls from Alice’s repository (or vice-versa).
</p>
<div>
<pre>$ hg pull ../alice
[...]
added 1 changesets with 1 changes to 2 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
2 new divergent changesets
</pre>
</div>
<p>
Figure 9 shows the situation in Bob’s repository.
</p>
<blockquote>
<p>
[figure SG09: Bob’s repo with 2 heads for the 2 divergent changesets, 6:a360 and 7:e3f9; wc is at 6:a360; both are successors of obsolete 4:2fe6, hence divergence]
</p>
</blockquote>
<p>
Now we need to get out of trouble. As usual, the answer is to evolve history.
</p>
<div>
<pre>$ HGMERGE=internal:other hg evolve
merge:[6] fix bug 24 (v2 by bob)
with: [7] fix bug 24 (v2 by alice)
base: [4] fix bug 24 (v1)
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
</pre>
</div>
<p>
Figure 10 shows how Bob’s repository looks now.
</p>
<blockquote>
<p>
[figure SG10: only one visible head, 9:5ad6, successor to hidden 6:a360 and 7:e3f9]
</p>
</blockquote>
<p>
We carefully dodged a merge conflict by specifying a merge tool (<tt><span>internal:other</span></tt>) that will take Alice’s changes over Bob’s. (You might wonder why Bob wouldn’t prefer his own changes by using <tt><span>internal:local</span></tt>. He’s avoiding a <a href="#bug">bug</a> in <tt><span>evolve</span></tt> that occurs when evolving divergent changesets using <tt><span>internal:local</span></tt>.)
</p>
<p>
# XXX this link does not work .. <span id="bug">bug</span>: <a href="https://bitbucket.org/marmoute/mutable-history/issue/48/" target="_blank">https://bitbucket.org/marmoute/mutable-history/issue/48/</a>
</p>
<p>
** STOP HERE: WORK IN PROGRESS **
</p>
</div>
<div id="phase-divergence-when-a-rewritten-changeset-is-made-public">
<h3>
<a href="#id18">Phase-divergence: when a rewritten changeset is made public</a><a href="#phase-divergence-when-a-rewritten-changeset-is-made-public" title="Permalink to this headline"></a>
</h3>
<p>
If Alice and Bob are collaborating on some mutable changesets, it’s possible to get into a situation where an otherwise worthwhile changeset cannot be pushed to the public repository; it is <em>phase-divergent</em> with another changeset that was made public first. Let’s demonstrate one way this could happen.
</p>
<p>
It starts with Alice committing a bug fix. Right now, we don’t yet know if this bug fix is good enough to push to the public repository, but it’s good enough for Alice to commit.
</p>
<div>
<pre>$ cd alice
$ echo 'fix' &gt; file2
$ hg commit -A -m 'fix bug 15'
adding file2
</pre>
</div>
<p>
Now Bob has a bad idea: he decides to pull whatever Alice is working on and tweak her bug fix to his taste:
</p>
<div>
<pre>$ cd ../bob
$ hg pull -u ../alice
[...]
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo 'Fix.' &gt; file2
$ hg amend -A -m 'fix bug 15 (amended)'
</pre>
</div>
<p>
(Note the lack of communication between Alice and Bob. Failing to communicate with your colleagues is a good way to get into trouble. Nevertheless, <tt><span>evolve</span></tt> can usually sort things out, as we will see.)
</p>
<blockquote>
<p>
[figure SG06: Bob’s repo with one amendment]
</p>
</blockquote>
<p>
After some testing, Alice realizes her bug fix is just fine as it is: no need for further polishing and amending, this changeset is ready to publish.
</p>
<div>
<pre>$ cd ../alice
$ hg push
[...]
added 1 changesets with 1 changes to 1 files
</pre>
</div>
<p>
This introduces a contradiction: in Bob’s repository, changeset 2:e011 (his copy of Alice’s fix) is obsolete, since Bob amended it. But in Alice’s repository (and the <tt><span>public</span></tt> repository), that changeset is public: it is immutable, carved in stone for all eternity. No changeset can be both obsolete and public, so Bob is in for a surprise the next time he pulls from <tt><span>public</span></tt>:
</p>
<div>
<pre>$ cd ../bob
$ hg pull -q -u
1 new phase-divergent changesets
</pre>
</div>
<p>
Figure 7 shows what just happened to Bob’s repository: changeset 2:e011 is now public, so it can’t be obsolete. When that changeset was obsolete, it made perfect sense for it to have a successor, namely Bob’s amendment of Alice’s fix (changeset 4:fe88). But it’s illogical for a public changeset to have a successor, so 4:fe88 is troubled: it has become <em>bumped</em>.
</p>
<blockquote>
<p>
[figure SG07: 2:e011 now public not obsolete, 4:fe88 now bumped]
</p>
</blockquote>
<p>
As usual when there’s trouble in your repository, the solution is to evolve it:
</p>
<p>
Figure 8 illustrates Bob’s repository after evolving away the bumped changeset. Ignoring the obsolete changesets, Bob now has a nice, clean, simple history. His amendment of Alice’s bug fix lives on, as changeset 5:227d—albeit with a software-generated commit message. (Bob should probably amend that changeset to improve the commit message.) But the important thing is that his repository no longer has any troubled changesets, thanks to <tt><span>evolve</span></tt>.
</p>
<blockquote>
<p>
[figure SG08: 5:227d is new, formerly bumped changeset 4:fe88 now hidden]
</p>
</blockquote>
</div>
</div>
<div id="conclusion">
<h2>
<a href="#id19">Conclusion</a><a href="#conclusion" title="Permalink to this headline"></a>
</h2>
<p>
Mutable history is a powerful tool. Like a sharp knife, an experienced user can do wonderful things with it, much more wonderful than with a dull knife (never mind a rusty spoon). At the same time, an inattentive or careless user can do harm to himself or others. Mercurial with <tt><span>evolve</span></tt> goes to great lengths to limit the harm you can do by trying to handle all possible types of “troubled” changesets. Nevertheless, having a first-aid kit nearby does not mean you should stop being careful with sharp knives.
</p>
<p>
Mutable history shared across multiple repositories by a single developer is a natural extension of this model. Once you are used to using a single sharp knife on its own, it’s pretty straightforward to chop onions and mushrooms using the same knife, or to alternate between two chopping boards with different knives.
</p>
<p>
Mutable history shared by multiple developers is a scary place to go. Imagine a professional kitchen full of expert chefs tossing their favourite knives back and forth, with the occasional axe or chainsaw thrown in to spice things up. If you’re confident that you <em>and your colleagues</em> can do it without losing a limb, go for it. But be sure to practice a lot first before you rely on it!
</p>
</div>
</div></article>

2
src/constants.rs
View file

@ -49,7 +49,7 @@ pub static OKAY_MAYBE_ITS_A_CANDIDATE: Lazy<Regex> = Lazy::new(|| {
}); });
pub static HAS_CONTENT: Lazy<Regex> = pub static HAS_CONTENT: Lazy<Regex> =
Lazy::new(|| Regex::new(r#"/\S$/"#).expect("HAS_CONTENT regex")); Lazy::new(|| Regex::new(r#"/\S$/"#).expect("HAS_CONTENT regex"));
pub static HASH_URL: Lazy<Regex> = Lazy::new(|| Regex::new(r#"/^#.+/"#).expect("HASH_URL regex")); pub static HASH_URL: Lazy<Regex> = Lazy::new(|| Regex::new(r#"^#.+"#).expect("HASH_URL regex"));
pub static POSITIVE: Lazy<Regex> = pub static POSITIVE: Lazy<Regex> =
Lazy::new(|| { Lazy::new(|| {
RegexBuilder::new( RegexBuilder::new(

29
src/full_text_parser/mod.rs
View file

@ -551,24 +551,6 @@ impl FullTextParser {
Ok(()) Ok(())
} }
fn add_attribute(
context: &Context,
tag: Option<&str>,
attribute: &str,
value: &str,
) -> Result<(), FullTextParserError> {
let xpath_tag = tag.unwrap_or("*");
let xpath = &format!("//{}", xpath_tag);
let node_vec = Util::evaluate_xpath(context, xpath, false)?;
for mut node in node_vec {
if let Err(err) = node.set_attribute(attribute, value) {
log::warn!("Failed to set attribute '{}' on node: {}", attribute, err);
}
}
Ok(())
}
fn repair_urls( fn repair_urls(
context: &Context, context: &Context,
xpath: &str, xpath: &str,
@ -580,13 +562,21 @@ impl FullTextParser {
for mut node in node_vec { for mut node in node_vec {
if let Some(url) = node.get_attribute(attribute) { if let Some(url) = node.get_attribute(attribute) {
let trimmed_url = url.trim(); let trimmed_url = url.trim();
let is_hash_url = url.starts_with('#');
let is_relative_url = url::Url::parse(&url) let is_relative_url = url::Url::parse(&url)
.err() .err()
.map(|err| err == url::ParseError::RelativeUrlWithoutBase) .map(|err| err == url::ParseError::RelativeUrlWithoutBase)
.unwrap_or(false); .unwrap_or(false);
let is_javascript = trimmed_url.contains("javascript:"); let is_javascript = trimmed_url.contains("javascript:");
if is_relative_url { if !is_hash_url && node.get_name().to_uppercase() == "A" {
_ = node.set_attribute("target", "_blank");
}
if is_hash_url {
_ = node.set_attribute(attribute, trimmed_url);
} else if is_relative_url {
let completed_url = match article_url.join(trimmed_url) { let completed_url = match article_url.join(trimmed_url) {
Ok(joined_url) => joined_url, Ok(joined_url) => joined_url,
Err(_) => continue, Err(_) => continue,
@ -697,7 +687,6 @@ impl FullTextParser {
_ = Self::fix_lazy_images(context, document); _ = Self::fix_lazy_images(context, document);
_ = Self::fix_iframe_size(context, "youtube.com"); _ = Self::fix_iframe_size(context, "youtube.com");
_ = Self::remove_attribute(context, Some("a"), "onclick"); _ = Self::remove_attribute(context, Some("a"), "onclick");
_ = Self::add_attribute(context, Some("a"), "target", "_blank");
// strip elements using Readability.com and Instapaper.com ignore class names // strip elements using Readability.com and Instapaper.com ignore class names
// .entry-unrelated and .instapaper_ignore // .entry-unrelated and .instapaper_ignore

2
src/full_text_parser/readability/mod.rs
View file

@ -578,8 +578,6 @@ impl Readability {
let text = Util::get_inner_text(&article_content, true); let text = Util::get_inner_text(&article_content, true);
let text_length = text.len(); let text_length = text.len();
//Util::serialize_node(&article_content, "dbg.html");
if text_length < constants::DEFAULT_CHAR_THRESHOLD { if text_length < constants::DEFAULT_CHAR_THRESHOLD {
parse_successful = false; parse_successful = false;

8
src/full_text_parser/readability/tests.rs
View file

@ -337,10 +337,10 @@ async fn medium_3() {
run_test("medium-3").await run_test("medium-3").await
} }
// #[tokio::test] #[tokio::test]
// async fn mercurial() { async fn mercurial() {
// run_test("mercurial").await run_test("mercurial").await
// } }
#[tokio::test] #[tokio::test]
async fn metadata_content_missing() { async fn metadata_content_missing() {