mermaid/gulp/tasks/release.js

var gulp = require('gulp')
var bump = require('gulp-bump')
var tagVersion = require('gulp-tag-version')

gulp.task('bump', function () {
  gulp.src('./bw.json')
    .pipe(bump({ key: 'version' }))
    .pipe(gulp.dest('./'))
})

// Assuming there's "version: 1.2.3" in package.json,
// tag the last commit as "v1.2.3"//
gulp.task('tag', function () {
  return gulp.src(['./package.json']).pipe(tagVersion())
})

/**
 * Bumping version number and tagging the repository with it.
 * Please read http://semver.org/
 *
 * You can use the commands
 *
 *     gulp patch     # makes v0.1.0 → v0.1.1
 *     gulp feature   # makes v0.1.1 → v0.2.0
 *     gulp release   # makes v0.2.1 → v1.0.0
 *
 * To bump the version numbers accordingly after you did a patch,
 * introduced a feature or made a backwards-incompatible release.
 */

function inc (importance) {
  // get all the files to bump version in
  return gulp.src(['./package.json'])
    // bump the version number in those files
    .pipe(bump({ type: importance }))
    // save it back to filesystem
    .pipe(gulp.dest('./'))
}

gulp.task('patch', function () { return inc('patch') })
gulp.task('feature', function () { return inc('minor') })
gulp.task('release', function () { return inc('major') })