🎉 Copy all the melon code over

src/commands/build.ts

@@ -0,0 +1,187 @@
+import execa from "execa";
+import {
+    existsSync,
+    readFileSync,
+    writeFileSync
+} from "fs";
+import { join, resolve } from "path";
+import { bin_name, log } from "..";
+import {
+    ARCHITECTURE,
+    BUILD_TARGETS,
+    CONFIGS_DIR,
+    ENGINE_DIR
+} from "../constants";
+import { dispatch } from "../utils";
+
+const platform: any = {
+    win32: "windows",
+    darwin: "macos",
+    linux: "linux"
+};
+
+const applyConfig = async (os: string, arch: string) => {
+    log.info("Applying mozconfig...");
+
+    let commonConfig = readFileSync(
+        resolve(CONFIGS_DIR, "common", "mozconfig"),
+        "utf-8"
+    );
+
+    const changesetPrefix = commonConfig
+        .split("\n")
+        .find((ln) =>
+            ln.startsWith("export MOZ_SOURCE_CHANGESET=")
+        );
+
+    const changeset = changesetPrefix?.replace(
+        /export MOZ_SOURCE_CHANGESET=/,
+        ""
+    );
+
+    const { stdout: gitSha } = await execa("git", [
+        "rev-parse",
+        "HEAD"
+    ]);
+
+    console.log(changeset, gitSha);
+
+    if (changeset)
+        commonConfig = commonConfig.replace(
+            changeset,
+            gitSha
+        );
+
+    writeFileSync(
+        resolve(CONFIGS_DIR, "common", "mozconfig"),
+        commonConfig
+    );
+
+    const osConfig = readFileSync(
+        resolve(
+            CONFIGS_DIR,
+            os,
+            arch === "i686"
+                ? "mozconfig-i686"
+                : "mozconfig"
+        ),
+        "utf-8"
+    );
+
+    // Allow a custom config to be placed in /mozconfig. This will not be committed
+    // to origin
+    const customConfig = existsSync(
+        join(process.cwd(), "mozconfig")
+    )
+        ? readFileSync(
+              join(process.cwd(), "mozconfig")
+          ).toString()
+        : "";
+
+    const mergedConfig = `# This file is automatically generated. You should only modify this if you know what you are doing!\n\n${commonConfig}\n\n${osConfig}\n\n${customConfig}`;
+
+    writeFileSync(
+        resolve(ENGINE_DIR, "mozconfig"),
+        mergedConfig
+    );
+
+    log.info(`Config for this \`${os}\` build:`);
+
+    mergedConfig.split("\n").map((ln) => {
+        if (
+            ln.startsWith("mk") ||
+            ln.startsWith("ac") ||
+            ln.startsWith("export")
+        )
+            log.info(
+                `\t${ln
+                    .replace(/mk_add_options /, "")
+                    .replace(/ac_add_options /, "")
+                    .replace(/export /, "")}`
+            );
+    });
+};
+
+const genericBuild = async (os: string, tier: string) => {
+    log.info(`Building for "${os}"...`);
+
+    log.warning(
+        `If you get any dependency errors, try running |${bin_name} bootstrap|.`
+    );
+
+    await dispatch(
+        `./mach`,
+        ["build"].concat(tier ? [tier] : []),
+        ENGINE_DIR
+    );
+};
+
+const parseDate = (d: number) => {
+    d = d / 1000;
+    var h = Math.floor(d / 3600);
+    var m = Math.floor((d % 3600) / 60);
+    var s = Math.floor((d % 3600) % 60);
+
+    var hDisplay =
+        h > 0
+            ? h + (h == 1 ? " hour, " : " hours, ")
+            : "";
+    var mDisplay =
+        m > 0
+            ? m + (m == 1 ? " minute, " : " minutes, ")
+            : "";
+    var sDisplay =
+        s > 0
+            ? s + (s == 1 ? " second" : " seconds")
+            : "";
+    return hDisplay + mDisplay + sDisplay;
+};
+
+const success = (date: number) => {
+    // mach handles the success messages
+    console.log();
+    log.info(
+        `Total build time: ${parseDate(
+            Date.now() - date
+        )}.`
+    );
+};
+
+interface Options {
+    arch: string;
+}
+
+export const build = async (
+    tier: string,
+    options: Options
+) => {
+    let d = Date.now();
+
+    // Host build
+
+    const prettyHost = platform[process.platform as any];
+
+    if (BUILD_TARGETS.includes(prettyHost)) {
+        let arch = "64bit";
+
+        if (options.arch) {
+            if (!ARCHITECTURE.includes(options.arch))
+                return log.error(
+                    `We do not support "${
+                        options.arch
+                    }" build right now.\nWe only currently support ${JSON.stringify(
+                        ARCHITECTURE
+                    )}.`
+                );
+            else arch = options.arch;
+        }
+
+        applyConfig(prettyHost, options.arch);
+
+        setTimeout(async () => {
+            await genericBuild(prettyHost, tier).then(
+                (_) => success(d)
+            );
+        }, 2500);
+    }
+};