You can install checksync if you want, but the easiest way to use it is via npx.

For detailed usage information, run npx checksync --help.

1. Add synchronization tags to files indicating what sections to synchronize and with which files:

   // my-javascriptfile.js
   // sync-start:mysyncid ./my-pythonfile.py
   /**
   * Some code that needs to be synchronised.
   */
   // sync-end:mysyncid
   # my-pythonfile.py
   # sync-start:mysyncid ./my-javascriptfile.js
   '''
   Some code that needs to be synchronised.
   '''
   # sync-end:mysyncid

   Use consecutive sync-start tags with the same identifier to target multiple files.

   // my-csharpfile.cs
   // sync-start:mysyncid ./my-pythonfile.py
   // sync-start:mysyncid ./my-javascriptfile.js
   /**
   * Some code that needs to be synchronised.
   */
   // sync-end:mysyncid

2. Run checksync to verify the tags are correct:

   pnpm checksync <globs|files|dirs>

3. Run with --update-tags or -u to automatically insert the missing checksums:

   pnpm checksync -u <globs|files|dirs>

4. Add a pre-commit step to run checksync on commiting changes so that you catch when synchronized blocks change. You can do this using a package like husky, or pre-commit.

5. Commit your tagged files!

To get more information about the various arguments that checksync supports as well as information about sync-tags, run pnpm checksync --help.

All target paths are relative to your project root directory. By default, this is determined, using ancesdir to be the ancestor directory of the files being processed that contains package.json. If you want to specify a different root (for example, if you're syncing across multiple packages in a monorepo) you can specify a custom marker name using the --root-marker argument.

For details on contributing to checksync, checkout our contribution guidelines.