scripts/deps/sync-vscode-settings.mjs

// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import childProcess from 'child_process';
import fs from 'fs';
import path from 'path';

// JSON files under .vscode/ synced by this script
const VSCODE_SETTINGS_TO_MERGE = [
  { settingsFile: 'settings.json' },
  { settingsFile: 'tasks.json', mergeField: 'tasks', byField: 'label' },
  {
    settingsFile: 'launch.json',
    mergeField: 'configurations',
    byField: 'name',
  },
];

// If the user has opted out of updates, return and do nothing.
if (Boolean(process.env['SKIP_VSCODE_SETTINGS_SYNC'])) {
  process.exit(0);
}

for (const { settingsFile, mergeField, byField } of VSCODE_SETTINGS_TO_MERGE) {
  const vscodeSettingsLocation = path.join(
    process.cwd(),
    '.vscode',
    settingsFile,
  );
  const devtoolsSettingsLocation = path.join(
    process.cwd(),
    '.vscode',
    'devtools-workspace-' + settingsFile,
  );

  // If there are no settings to copy and paste, skip.
  if (!fs.existsSync(devtoolsSettingsLocation)) {
    continue;
  }

  try {
    const devtoolsSettings = (
      await import(devtoolsSettingsLocation, {
        with: { type: 'json' },
      })
    ).default;
    let preExistingSettings = {};
    if (fs.existsSync(vscodeSettingsLocation)) {
      preExistingSettings = (
        await import(vscodeSettingsLocation, {
          with: { type: 'json' },
        })
      ).default;
    }

    const updatedSettings = {
      ...devtoolsSettings,
      // Any setting specified by the engineer will always take precedence over the defaults
      ...preExistingSettings,
    };

    // TODO: We found that this never work so patch it now
    // so gclient sync updates it.
    // Later we should remove and allow user to keep their
    // preference.
    if (updatedSettings['eslint.runtime']) {
      const nodePath = childProcess
        .execSync(
          path.join(
            import.meta.dirname,
            '..',
            '..',
            'third_party',
            'node',
            'node_path.py',
          ),
        )
        .toString('utf-8')
        .trim();

      updatedSettings['eslint.runtime'] = nodePath;
    }

    if (
      mergeField &&
      byField &&
      preExistingSettings[mergeField] &&
      devtoolsSettings[mergeField]
    ) {
      // We need to merge two lists in a field. The list items have a unique
      // id specified by byField. If an entry is found in devtoolsSettings we
      // assume it should be updated when the devtools settings file is updated,
      // otherwise we keep the preexisting setting.
      const mergedList = [...devtoolsSettings[mergeField]];
      const doNotDuplicate = new Set(mergedList.map(item => item[byField]));
      for (const item of preExistingSettings[mergeField]) {
        if (!doNotDuplicate.has(item[byField])) {
          mergedList.push(item);
        }
      }
      updatedSettings[mergeField] = mergedList;
    }
    fs.writeFileSync(
      vscodeSettingsLocation,
      JSON.stringify(updatedSettings, null, 2),
    );
  } catch (err) {
    console.warn('Unable to update VSCode settings - skipping');
    console.warn(err.stack);
  }
}