Function setupFileWatchers

cli/src/utils/theme-system.ts:1174–1228

()

 * Watches parent directories which reliably catches all file modifications
 */
export const setupFileWatchers = () => {
  const watchTargets: string[] = []
  const watchedDirs = new Set<string>()

  // macOS system preferences
  if (process.platform === 'darwin') {
    watchTargets.push(
      join(homedir(), 'Library/Preferences/.GlobalPreferences.plist'),
      join(homedir(), 'Library/Preferences/com.apple.Terminal.plist'),
    )
  }

  // IDE config files - only watch for the active IDE terminal
  if (isVSCodeFamilyTerminal()) {
    watchTargets.push(...resolveVSCodeSettingsPaths())
  }
  if (isJetBrainsTerminal()) {
    watchTargets.push(...resolveJetBrainsLafPaths())
  }
  if (isZedTerminal()) {
    watchTargets.push(...resolveZedSettingsPaths())
  }

  // Watch parent directories instead of individual files
  // Directory watches are more reliable for catching all modifications including plist key deletions
  for (const target of watchTargets) {
    if (existsSync(target)) {
      const parentDir = dirname(target)

      // Only watch each directory once
      if (watchedDirs.has(parentDir)) continue
      watchedDirs.add(parentDir)

      try {
        // Watch the directory - catches all file modifications
        const watcher = watch(
          parentDir,
          { persistent: false },
          (eventType, filename) => {
            // Only respond to changes affecting our target files
            if (filename && watchTargets.some((t) => t.endsWith(filename))) {
              debouncedRecomputeSystemTheme()
            }
          },
        )

        watcher.on('error', () => {
          // Silently ignore watcher errors
        })
      } catch {
        // Silently ignore if we can't watch
      }
    }
  }
}

/**
 * SIGUSR2 signal handler for manual theme refresh