gistfile1.js

#!/usr/bin/env node

/*
 * Hook en Node.js para detectar cambios en archivos estaticos, obtener el id corto del ultimo commit
 * y ejecutar una tarea en grunt.
 *
 * @author Jan Sanchez
 */

var fs = require('fs'),
    exec = require('child_process').exec,
    extensions = ['css', 'js', 'png', 'jpg', 'gif'],
    hasStatic = false,
    commitFile = "src/last_commit";

console.log(' + Ejecutando Hook...');

function execute(command, callback) {
    exec(command, function(error, stdout, stderr) {
        callback(stdout);
    });
};

module.exports.getLastCommit = function(callback) {
    var commit = {};
    execute("git rev-list --max-count=1 HEAD", function(last) {
        commit.last = last.replace("\n", "");
        execute("git rev-list --max-count=1 HEAD~1", function(penultimate) {
            commit.penultimate = penultimate.replace("\n", "");
            var diff = "git diff " + commit.last + " " + commit.penultimate + " --name-only";
            execute(diff, function(files) {
                files = files.replace(/\n/gi, ',');
                files = files.substr(0, files.length - 1);
                commit.files = files.split(',');
                callback(commit);
            });
        });
    });
};



module.exports.getLastCommit(function(obj) {
    //console.log(obj.files);
    for (var i = 0; i < obj.files.length; i++) {
        if (/\.js$|\.css$|\.jpg$|\.png$|\.gif$/.test(obj.files[i])) {
            hasStatic = true;
            break;
        }
    };
    if (hasStatic) {
        console.log("   - extensiones estaticas detectadas.");

        exec('grunt produccion', {
            cwd: '/home/jan/htdocs/flux/frontend/grunt'
        }, function(err, stdout, stderr) {
            console.log(stdout);
            var exitCode = 0;
            if (err) {
                console.log(stderr);
                exitCode = -1;
            } else {
                console.log('   - fin de minificacion de estaticos.');
                execute("git log -1 --format=%h", function(idCommit) {
                    idCommit = idCommit.replace(/\n/gi, '');
                    //console.log(idCommit);
                    fs.writeFile(commitFile, idCommit, function(err) {
                        if (err) {
                            console.log(err);
                        } else {
                            var msg = 'update "' + commitFile + '" to ' + idCommit;
                            execute("git add .; git commit -m \"" + msg + "\" ", function() {
                                console.log("   - " + msg);
                            });
                        }
                    });
                });

            }
            //process.exit(exitCode);
        });


    };
});