https://github.com/somewhatabstract/checksync

A tool for helping folks keep things in sync.
https://github.com/somewhatabstract/checksync

code-quality developer-tools development-utils development-workflow linting synchronization tool tools tools-engineering

Last synced: 4 months ago
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A tool for helping folks keep things in sync.

• Host: GitHub
• URL: https://github.com/somewhatabstract/checksync
• Owner: somewhatabstract
• License: mit
• Created: 2019-08-22T20:37:47.000Z (about 6 years ago)
• Default Branch: main
• Last Pushed: 2025-07-12T14:41:05.000Z (4 months ago)
• Last Synced: 2025-07-12T16:12:22.810Z (4 months ago)
• Topics: code-quality, developer-tools, development-utils, development-workflow, linting, synchronization, tool, tools, tools-engineering
• Language: TypeScript
• Homepage:
• Size: 7.8 MB
• Stars: 18
• Watchers: 4
• Forks: 2
• Open Issues: 14
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md

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README

          
# checksync

[![Node CI](https://github.com/somewhatabstract/checksync/workflows/Node%20CI/badge.svg)](https://github.com/somewhatabstract/checksync/actions) [![codecov](https://codecov.io/gh/somewhatabstract/checksync/branch/main/graph/badge.svg)](https://codecov.io/gh/somewhatabstract/checksync) [![npm (tag)](https://img.shields.io/npm/v/checksync/latest)](https://www.npmjs.com/package/checksync) [![Required Node Version](https://img.shields.io/node/v/checksync/latest)](https://www.npmjs.com/package/checksync)

## Usage

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

```shell

npx checksync --help

```

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

### Example workflow

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

    ```javascript

    // my-javascriptfile.js

    // sync-start:mysyncid ./my-pythonfile.py

    /**

     * Some code that needs to be synchronised.

     */

    // sync-end:mysyncid

    ```

    ```python

    # 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.

    ```c#

    // 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

    ```

1. Run `checksync` to verify the tags are correct:

    ```shell

    pnpm checksync 

    ```

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

    ```shell

    pnpm checksync -u 

    ```

1. 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.

1. 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`.

### Target file paths

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.

## Contributing

For details on contributing to `checksync`, checkout our [contribution guidelines](CONTRIBUTING.md).