Generate/ find the source map file

[jessieAnhNguyen]

Suggestions from Ram:

1. Check if Dev mode or Prod Mode: 1 of 2 ways

• Check if metro is running
• Download bundle file on the device from APP_DIR/assets, and check if this file is minified (better option).

2. Generate source maps using react-native bundle --minify={isProdMode}: 1 of 2 ways

• ExecSync Out
• require('react-native') and then generate the source map

[jessieAnhNguyen]

Change of plan, the tool just works for Dev mode only (since we can't do adb shell run-as in Prod mode)

• Add a flag --generate-source-map, in which case
  • If metro server is running, get bundle and source maps from running metro server, and store in os.tmpDir()
  • If metro server is not running, run the command react-native bundleand store the bundle and source map in os.tmpDir()

If there's no flag, proceed in 2 steps:

• Find the source map from local development machine,

  • If the CLI is generating a bundle in debug mode, the bundle will exist
  • Directory android/app/build/generated/sourcemaps/react/debug/index.android.bundle.map OR android/app/build/intermediates/sourcemaps/react/debug/index.android.bundle.packager.map

• Request the bundle from running server

  • Make a request to the URL, http://${IP_ADDRESS}:${DEBUG_SERVER_PORT}/${MAP_FILE_NAME}?platform=${PLATFORM}&dev=true
  • Get the source map file and store it in the os.tmpDir()

If both steps above failed:
- Instruct them how to get source map: turn bundleInDebug: true on build.gradle
- Run without source maps