Gitolite Post-Receive Hook for Node.js

post-receive

#!/usr/bin/env node

var deployable = process.env.GL_OPTION_DEPLOYABLE;
var jekyll = process.env.GL_OPTION_JEKYLL;

if ( ! deployable ) {
  return;
}

var fs = require( 'fs' );
var spawn = require( 'child_process' ).spawn;
var exec = require( 'child_process' ).exec;

var repoName = process.env.GL_REPO.toLowerCase();
var repoBase = process.env.GL_REPO_BASE + '/' + repoName + '.git';
var workTree = '/var/www/' + repoName;

function createDirectory () {
  console.log('=> Creating ' + workTree + ' directory...');
  exec( 'sudo mkdir -p ' + workTree + '', function ( error, stdout, stderr ) {
    if ( ! error ) {
      console.log( '=> ' + workTree + ' created successfully...' );
      updatePermissions();
    }
  } );
}

function updateDirectory () {
  console.log( '=> Updating ' + workTree + ' with latest commit...' );
  var git = spawn( 'git', [ 'checkout', '-f' ], {
    env: {
      'GIT_WORK_TREE': workTree,
      'GIT_DIR': repoBase
    }
  } );

  git.on( 'close', function ( code ) {
    if ( 0 ===  code ) {
      console.log( '=> ' + workTree + ' updated successfully...' );
    }
  } );

  if ( jekyll ) {
    loadJekyll();
  }

}

function loadJekyll() {

    var previousDirectory = process.cwd();

    try {

        process.chdir( workTree );

        console.log( '=> Installing gems for Jekyll site [ ' + repoName + ' ]...' );
        exec( 'rvm 2.2.2 exec bundle install' , function( error, stdout, stderr ) {

            if ( ! error ) {
                console.log( '=> Gems for Jekyll site [ ' + repoName + ' ] successfully installed... ' );
            }

        } );

        console.log( '=> Building Jekyll site [ ' + repoName + ' ] with `bundle exec jekyll build`...' );
        exec( 'rvm 2.2.2 exec bundle exec jekyll build', function( error, stdout, stderr ) {

            if ( ! error ) {
                console.log( '=> ' + workTree + '/_sites deployed successfully...' );
                updatePermissions( true );
                process.chdir( previousDirectory );
            }

        } );

    } catch ( error ) {

        console.error( 'Project directory not found: ' + error );

    }

}

function updatePermissions ( disable ) {

  exec( 'sudo chown -R git:www-data ' + workTree + '', function ( error, stdout, stderror ) {

    if ( ! error ) {

      console.log( '=> Permissions recursively resolved to git:www-data...' );

      if ( ! disable ) {
        updateDirectory();
      }

    }

  } );

}

console.log( '=> Deploying ' + repoName + '...' );

fs.exists( workTree, function ( exists ) {
  if ( exists ) {
    console.log( '=> ' + workTree + ' exists...' );
    updatePermissions();
  } else {
    console.log( '=> ' + workTree + ' doesn\'t exist.' );
    createDirectory();
  }
} );

process.on( 'exit', function ( code ) {
  if ( 0 === code ) {
    console.log( '================================================================================' );
    if ( ! jekyll ) {
        console.log( '=> Your site is available @ http://rogeruiz.com/' + repoName + '' );
    } else {
        console.log( '=> Jekyll site [ ' + repoName + ' ] has been updated' );
    }
  }
} );