Gulpfile for bumping versions with semver

gulpfile.js

var gulp = require('gulp'),
    git = require('gulp-git'),
    filter = require('gulp-filter'),
    bump = require('gulp-bump'),
    semver = require('semver'),
    fs = require('fs'),
    tagVersion = require('gulp-tag-version');

// Loads the package for parsing
function getPackageJson() {
  return JSON.parse(fs.readFileSync('./package.json', 'utf8'));
}

// Increments the version using semver
function inc(type) {
  var pkg = getPackageJson();
  var newVer = semver.inc(pkg.version, type);

  return gulp.src(['./package.json'])
    .pipe(bump({ version: newVer }))
    .pipe(gulp.dest('./'))
    .pipe(git.commit('Tagged new version [' + newVer + ']'))
    .pipe(filter('package.json'))
    .pipe(tagVersion());
}

gulp.task('bump:major', function() { return inc('major'); });
gulp.task('bump:minor', function() { return inc('minor'); });
gulp.task('bump:patch', function() { return inc('patch'); });
gulp.task('bump', ['bump:patch']);