build: strip trailing whitespace in docs (#17488)

docs/api/auto-updater.md

@@ -84,7 +84,7 @@ Emitted when an update has been downloaded.
 
 On Windows only `releaseName` is available.
 
-**Note:** It is not strictly necessary to handle this event. A successfully 
+**Note:** It is not strictly necessary to handle this event. A successfully
 downloaded update will still be applied the next time the application starts.
 
 ### Event: 'before-quit-for-update'
@@ -125,8 +125,8 @@ Under the hood calling `autoUpdater.quitAndInstall()` will close all application
 windows first, and automatically call `app.quit()` after all windows have been
 closed.
 
-**Note:** It is not strictly necessary to call this function to apply an update, 
-as a successfully downloaded update will always be applied the next time the 
+**Note:** It is not strictly necessary to call this function to apply an update,
+as a successfully downloaded update will always be applied the next time the
 application starts.
 
 [squirrel-mac]: https://github.com/Squirrel/Squirrel.Mac

docs/api/breaking-changes.md

@@ -102,7 +102,7 @@ Child windows opened with the `nativeWindowOpen` option will always have Node.js
 Renderer process APIs `webFrame.setRegisterURLSchemeAsPrivileged` and `webFrame.registerURLSchemeAsBypassingCSP` as well as browser process API `protocol.registerStandardSchemes` have been removed.
 A new API, `protocol.registerSchemesAsPrivileged` has been added and should be used for registering custom schemes with the required privileges. Custom schemes are required to be registered before app ready.
 
-## webFrame Isolated World APIs 
+## webFrame Isolated World APIs
 
 ```js
 // Deprecated

docs/api/dialog.md

@@ -115,7 +115,7 @@ dialog.showOpenDialogSync(mainWindow, {
 
 Returns `Promise<Object>` - Resolve wih an object containing the following:
 
-* `canceled` - Boolean - whether or not the dialog was canceled. 
+* `canceled` - Boolean - whether or not the dialog was canceled.
 * `filePaths` String[] (optional) - An array of file paths chosen by the user. If the dialog is cancelled this will be an empty array.
 * `bookmarks` String[] (optional) _macOS_ _mas_ - An array matching the `filePaths` array of base64 encoded strings which contains security scoped bookmark data. `securityScopedBookmarks` must be enabled for this to be populated.
 

docs/api/process.md

@@ -84,7 +84,7 @@ instead of the `--no-deprecation` command line flag.
 ### `process.enablePromiseAPIs`
 
 A `Boolean` that controls whether or not deprecation warnings are printed to `stderr` when
-formerly callback-based APIs converted to Promises are invoked using callbacks. Setting this to `true` 
+formerly callback-based APIs converted to Promises are invoked using callbacks. Setting this to `true`
 will enable deprecation warnings.
 
 ### `process.resourcesPath`
@@ -178,7 +178,7 @@ Returns an object giving memory usage statistics about the current process. Note
 that all statistics are reported in Kilobytes.
 This api should be called after app ready.
 
-Chromium does not provide `residentSet` value for macOS. This is because macOS 
+Chromium does not provide `residentSet` value for macOS. This is because macOS
 performs in-memory compression of pages that haven't been recently used. As a
 result the resident set size value is not what one would expect. `private` memory
 is more representative of the actual pre-compression memory usage of the process

docs/api/system-preferences.md

@@ -90,7 +90,7 @@ that contains the user information dictionary sent along with the notification.
 * `callback` Function
   * `event` String
   * `userInfo` Object
-  
+
 Returns `Number` - The ID of this subscription
 
 Subscribes to native notifications of macOS, `callback` will be called with
@@ -115,7 +115,7 @@ example values of `event` are:
 * `callback` Function
   * `event` String
   * `userInfo` Object
-  
+
 Returns `Number` - The ID of this subscription
 
 Same as `subscribeNotification`, but uses `NSNotificationCenter` for local defaults.
@@ -149,9 +149,9 @@ Same as `unsubscribeNotification`, but removes the subscriber from `NSNotificati
 
 Same as `unsubscribeNotification`, but removes the subscriber from `NSWorkspace.sharedWorkspace.notificationCenter`.
 
-### `systemPreferences.registerDefaults(defaults)` _macOS_		
+### `systemPreferences.registerDefaults(defaults)` _macOS_
 
-* `defaults` Object - a dictionary of (`key: value`) user defaults			
+* `defaults` Object - a dictionary of (`key: value`) user defaults
 
 Add the specified defaults to your application's `NSUserDefaults`.
 
@@ -319,7 +319,7 @@ This API is only available on macOS 10.14 Mojave or newer.
     * `unemphasized-selected-text-background` - A background for selected text in a non-key window or view.
     * `unemphasized-selected-text` - Selected text in a non-key window or view.
     * `window-background` - The background of a window.
-    * `window-frame-text` - The text in the window's titlebar area.	
+    * `window-frame-text` - The text in the window's titlebar area.
 
 Returns `String` - The system color setting in RGB hexadecimal form (`#ABCDEF`).
 See the [Windows docs][windows-colors] and the [MacOS docs][macos-colors] for more details.

docs/development/build-instructions-gn.md

@@ -89,7 +89,7 @@ $ git branch --set-upstream-to=origin/master
 $ cd -
 ```
 
-:memo: `gclient` works by checking a file called `DEPS` inside the 
+:memo: `gclient` works by checking a file called `DEPS` inside the
 `src/electron` folder for dependencies (like Chromium or Node.js).
 Running `gclient sync -f` ensures that all dependencies required
 to build Electron match that file.

docs/development/releasing.md

@@ -26,7 +26,7 @@ with the scope of `Build (read and execute)`.
 If you don't have these, ask a team member to help you.
 
 Once you've generated these tokens, put them in a `.env` file in the root directory
-of the project. This file is gitignored, and will be loaded into the 
+of the project. This file is gitignored, and will be loaded into the
 environment by the release scripts.
 
 

docs/tutorial/security.md

@@ -48,21 +48,21 @@ the result of the overall security of the framework foundation
 your code. As such, it is your responsibility to follow a few important best
 practices:
 
-* **Keep your application up-to-date with the latest Electron framework release.** 
-When releasing your product, you’re also shipping a bundle composed of Electron, 
-Chromium shared library and Node.js. Vulnerabilities affecting these components 
-may impact the security of your application. By updating Electron to the latest 
-version, you ensure that critical vulnerabilities (such as *nodeIntegration bypasses*) 
+* **Keep your application up-to-date with the latest Electron framework release.**
+When releasing your product, you’re also shipping a bundle composed of Electron,
+Chromium shared library and Node.js. Vulnerabilities affecting these components
+may impact the security of your application. By updating Electron to the latest
+version, you ensure that critical vulnerabilities (such as *nodeIntegration bypasses*)
 are already patched and cannot be exploited in your application.
 
-* **Evaluate your dependencies.** While NPM provides half a million reusable packages, 
-it is your responsibility to choose trusted 3rd-party libraries. If you use outdated 
-libraries affected by known vulnerabilities or rely on poorly maintained code, 
+* **Evaluate your dependencies.** While NPM provides half a million reusable packages,
+it is your responsibility to choose trusted 3rd-party libraries. If you use outdated
+libraries affected by known vulnerabilities or rely on poorly maintained code,
 your application security could be in jeopardy.
 
-* **Adopt secure coding practices.** The first line of defense for your application 
-is your own code. Common web vulnerabilities, such as Cross-Site Scripting (XSS), 
-have a higher security impact on Electron applications hence it is highly recommended 
+* **Adopt secure coding practices.** The first line of defense for your application
+is your own code. Common web vulnerabilities, such as Cross-Site Scripting (XSS),
+have a higher security impact on Electron applications hence it is highly recommended
 to adopt secure software development best practices and perform security testing.
 
 

docs/tutorial/updates.md

@@ -8,7 +8,7 @@ Electron's [autoUpdater](../api/auto-updater.md) module.
 ## Using `update.electronjs.org`
 
 GitHub's Electron team maintains [update.electronjs.org], a free and open-source
-webservice that Electron apps can use to self-update. The service is designed 
+webservice that Electron apps can use to self-update. The service is designed
 for Electron apps that meet the following criteria:
 
 - App runs on macOS or Windows
@@ -31,13 +31,13 @@ Invoke the updater from your app's main process file:
 require('update-electron-app')()
 ```
 
-By default, this module will check for updates at app startup, then every ten 
-minutes. When an update is found, it will automatically be downloaded in the background. When the download completes, a dialog is displayed allowing the user 
+By default, this module will check for updates at app startup, then every ten
+minutes. When an update is found, it will automatically be downloaded in the background. When the download completes, a dialog is displayed allowing the user
 to restart the app.
 
-If you need to customize your configuration, you can 
+If you need to customize your configuration, you can
 [pass options to `update-electron-app`][update-electron-app]
-or 
+or
 [use the update service directly][update.electronjs.org].
 
 ## Using `electron-builder`
@@ -51,7 +51,7 @@ update mechanism, meaning that the rest of this documentation will not apply to
 ## Deploying an Update Server
 
 If you're developing a private Electron application, or if you're not
-publishing releases to GitHub Releases, it may be necessary to run your own 
+publishing releases to GitHub Releases, it may be necessary to run your own
 update server.
 
 Depending on your needs, you can choose from one of these:

filenames.auto.gni

@@ -86,6 +86,7 @@ auto_filenames = {
     "docs/api/structures/notification-action.md",
     "docs/api/structures/point.md",
     "docs/api/structures/printer-info.md",
+    "docs/api/structures/process-memory-info.md",
     "docs/api/structures/process-metric.md",
     "docs/api/structures/product.md",
     "docs/api/structures/rectangle.md",

package.json

@@ -63,8 +63,9 @@
     "lint:cpp": "node ./script/lint.js --cc",
     "lint:py": "node ./script/lint.js --py",
     "lint:gn": "node ./script/lint.js --gn",
-    "lint:docs": "remark docs -qf && npm run lint:js-in-markdown && npm run create-typescript-definitions && npm run lint:docs-relative-links",
+    "lint:docs": "remark docs -qf && npm run lint:js-in-markdown && npm run create-typescript-definitions && npm run lint:docs-relative-links && npm run lint:check-trailing-whitespace",
     "lint:docs-relative-links": "python ./script/check-relative-doc-links.py",
+    "lint:check-trailing-whitespace": "python ./script/check-trailing-whitespace.py",
     "lint:js-in-markdown": "standard-markdown docs",
     "create-api-json": "electron-docs-linter docs --outfile=electron-api.json",
     "create-typescript-definitions": "npm run create-api-json && electron-typescript-definitions --in=electron-api.json --out=electron.d.ts && node spec/ts-smoke/runner.js",

script/check-trailing-whitespace.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+DOCS_DIR = os.path.join(SOURCE_ROOT, 'docs')
+
+def main():
+  os.chdir(SOURCE_ROOT)
+
+  filepaths = []
+  totalDirs = 0
+  try:
+    for root, dirs, files in os.walk(DOCS_DIR):
+      totalDirs += len(dirs)
+      for f in files:
+        if f.endswith('.md'):
+          filepaths.append(os.path.join(root, f))
+  except KeyboardInterrupt:
+    print('Keyboard interruption. Please try again.')
+    return
+
+  trailingWhiteSpaceFiles = 0
+  for path in filepaths:
+    trailingWhiteSpaceFiles += hasTrailingWhiteSpace(path)
+
+  print('Parsed through ' + str(len(filepaths)) +
+        ' files within docs directory and its ' +
+        str(totalDirs) + ' subdirectories.')
+  print('Found ' + str(trailingWhiteSpaceFiles) +
+        ' files with trailing whitespace.')
+  return trailingWhiteSpaceFiles
+
+def hasTrailingWhiteSpace(filepath):
+  try:
+    f = open(filepath, 'r')
+    lines = f.read().splitlines()
+  except KeyboardInterrupt:
+    print('Keyboard interruption whle parsing. Please try again.')
+  finally:
+    f.close()
+
+  for line in lines:
+    if line != line.rstrip():
+      print "Trailing whitespace in: " + filepath
+      return True
+
+  return False
+
+if __name__ == '__main__':
+  sys.exit(main())