Node git pre-commit hook

README.md

Here's how this works:

• Include a git-hooks/ directory in your project, with these two files (plus other hooks if you want, written in a similar style).
• Ensure the files under the git-hooks/ directory are executable: chmod 755 git-hooks/*
• Add test script to your package.json, e.g.

    "scripts": {
        "test": "mocha"
    }

• Whenever you clone the repository, run git-hooks/install-hooks to symlink the hooks stored in the repository, in git-hooks, to the hidden .git/hooks directory.

git-hooks∕install-hooks

#!/usr/bin/env node
var fs = require("fs");
var path = require("path");
var gitHookDir = path.resolve(__dirname, '..', '.git', 'hooks');

["applypatch-msg", "commit-msg", "post-commit", "post-receive", "post-update", "pre-applypatch", "pre-commit",
 "prepare-commit-msg", "pre-rebase", "update"].forEach(function (hook) {

    var hookInSourceControl = path.resolve(__dirname, hook);
    if (fs.existsSync(hookInSourceControl)) {
        var hookInHiddenDirectory = path.resolve(gitHookDir, hook);

        if (fs.existsSync(hookInHiddenDirectory)) {
            fs.unlinkSync(hookInHiddenDirectory);
        }

        fs.symlinkSync(path.relative(gitHookDir, hookInSourceControl), hookInHiddenDirectory);
    }
});

git-hooks∕pre-commit

#!/usr/bin/env node
var npm = require('npm');

npm.load(function (err) {
    if (err) throw err;

    // run `npm test`
    npm.commands.test(function(err) {
        if (err) failed('test', err);

        // Chain additional commands...
        //npm.commands['run-script'](['foo'], function(err) {
        //    if (err) failed('foo', err);
        //});
    });
});

function failed(msg, err) {
    console.error('\npre-commit failure:', msg, err);
    process.exit(1);
}