🎨 New, overkill linter

src/utils/command-exists.ts

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+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+// This file was originally under the MIT license, but is now under the MPL 2.0
+// license. The following license notice applies to only this file
+//
+// The MIT License (MIT)
+//
+// Copyright (c) 2014 Matthew Conlen
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// Adapted from the `command-exists` node module
+// https://github.com/mathisonian/command-exists
+
+import { execSync } from 'node:child_process'
+import { accessSync, constants } from 'node:fs'
+import path from 'node:path'
+
+const onWindows = process.platform == 'win32'
+
+const fileNotExistsSync = (commandName: string): boolean => {
+  try {
+    accessSync(commandName, constants.F_OK)
+    return false
+  } catch {
+    return true
+  }
+}
+
+const localExecutableSync = (commandName: string): boolean => {
+  try {
+    accessSync(commandName, constants.F_OK | constants.X_OK)
+    return true
+  } catch {
+    return false
+  }
+}
+
+const commandExistsUnixSync = function (
+  commandName: string,
+  cleanedCommandName: string
+): boolean {
+  if (fileNotExistsSync(commandName)) {
+    try {
+      const stdout = execSync(
+        'command -v ' +
+          cleanedCommandName +
+          ' 2>/dev/null' +
+          ' && { echo >&1 ' +
+          cleanedCommandName +
+          '; exit 0; }'
+      )
+      return !!stdout
+    } catch {
+      return false
+    }
+  }
+  return localExecutableSync(commandName)
+}
+
+const commandExistsWindowsSync = function (
+  commandName: string,
+  cleanedCommandName: string
+): boolean {
+  // Regex from Julio from: https://stackoverflow.com/questions/51494579/regex-windows-path-validator
+  if (
+    !/^(?!(?:.*\s|.*\.|\W+)$)(?:[A-Za-z]:)?(?:[^\n"*:<>?|]+(?:\/\/|\/|\\\\|\\)?)+$/m.test(
+      commandName
+    )
+  ) {
+    return false
+  }
+  try {
+    const stdout = execSync('where ' + cleanedCommandName, { stdio: [] })
+    return !!stdout
+  } catch {
+    return false
+  }
+}
+
+function cleanInput(toBeCleaned: string): string {
+  // Windows has a different cleaning process to Unix, so we should go through
+  // that process first
+  if (onWindows) {
+    const isPathName = /\\/.test(toBeCleaned)
+    if (isPathName) {
+      const dirname = '"' + path.dirname(toBeCleaned) + '"'
+      const basename = '"' + path.basename(toBeCleaned) + '"'
+      return `${dirname}:${basename}`
+    }
+
+    return `"${toBeCleaned}"`
+  }
+
+  // Otherwise go through the unix cleaning process
+  if (/[^\w/:=\\-]/.test(toBeCleaned)) {
+    toBeCleaned = "'" + toBeCleaned.replace(/'/g, "'\\''") + "'"
+    toBeCleaned = toBeCleaned
+      .replace(/^(?:'')+/g, '') // unduplicate single-quote at the beginning
+      .replace(/\\'''/g, "\\'") // remove non-escaped single-quote if there are enclosed between 2 escaped
+  }
+
+  return toBeCleaned
+}
+
+export function commandExistsSync(commandName: string): boolean {
+  const cleanedCommandName = cleanInput(commandName)
+  return onWindows ? commandExistsWindowsSync(commandName, cleanedCommandName) : commandExistsUnixSync(commandName, cleanedCommandName);
+}