gulpfile.js

'use strict';

const path = require('path');
const gulp = require('gulp');
const eslint = require('gulp-eslint');
const excludeGitignore = require('gulp-exclude-gitignore');
const mocha = require('gulp-mocha');
const istanbul = require('gulp-istanbul');
const nsp = require('gulp-nsp');
const plumber = require('gulp-plumber');
const coveralls = require('gulp-coveralls');
const del = require('del');
const isparta = require('isparta');

gulp.task('static', function () {
  return gulp.src('**/*.js')
    .pipe(excludeGitignore())
    .pipe(eslint())
    .pipe(eslint.format())
    .pipe(eslint.failAfterError());
});

gulp.task('nsp', function (cb) {
  nsp({package: path.resolve('package.json')}, cb);
});

gulp.task('pre-test', function () {
  return gulp.src(['lib/**/*.js', '!lib/**/*.test.js'])
    .pipe(excludeGitignore())
    .pipe(istanbul({
      includeUntested: true,
      instrumenter: isparta.Instrumenter
    }))
    .pipe(istanbul.hookRequire());
});

gulp.task('test', ['pre-test'], function () {
  return gulp.src(['lib/**/*.test.js', 'test/**/*.js'])
    .pipe(plumber())
    .pipe(mocha({reporter: 'nyan'}))
    .pipe(istanbul.writeReports());
});

gulp.task('watch', ['test'], function () {
  gulp.watch(['lib/**/*.js', 'test/**'], ['test']);
});

gulp.task('coveralls', ['test'], function () {
  if (!process.env.CI) {
    return;
  }

  return gulp.src(path.join(__dirname, 'coverage/lcov.info'))
    .pipe(coveralls());
});

gulp.task('babel', ['clean'], function () {
  return gulp.src([
    'lib/**/*.js',
    '!lib/**/*.test.js'
  ])
    .pipe(gulp.dest('dist'));
});

gulp.task('clean', function () {
  return del('dist');
});

gulp.task('prepublish', ['nsp', 'babel']);
gulp.task('default', ['static', 'test', 'coveralls']);