gulpfile.js

'use strict';

const gulp = require('gulp');
const gulpConcatPo = require('gulp-concat-po');
const gulpXgettext = require('gulp-xgettext');
const gulpReplace = require('gulp-replace');
const gulpRename = require('gulp-rename');
const gulpSass = require('gulp-ruby-sass');
const gulpFilter = require('gulp-filter');
const gutil = require('gulp-util');
const exec = require('child_process').exec;

gulp.task('pot', pot);
gulp.task('update-po', updatePo);
// Prepare all /census/locale/*/LC_MESSAGES/*.po files to use with i18n-abide
gulp.task('compile-po', compilePo);
gulp.task('compile-styles', compileStyles);

function pot() {
  const jsFilter = gulpFilter('**/controllers/*.js', {restore: true});
  const htmlFilter = gulpFilter('**/*.html', {restore: true});
  const excludedDirs = '!(views_old|static|migrations|locale|ui_app|public)';

  return gulp.src(['census/' + excludedDirs + '/**/*.{html,js}'])
  // Filter just the html files
  .pipe(htmlFilter)
  // jsxgettext hates 'or' in templates, so make these special exceptions.
  // https://github.com/zaach/jsxgettext/issues/78
  .pipe(gulpReplace(/or gettext/g, '|| gettext'))
  .pipe(gulpReplace(/or false/g, '|| false'))
  .pipe(gulpReplace(/or \'\'/g, '|| \'\''))
  .pipe(gulpXgettext({
    language: 'jinja',
    bin: 'node_modules/.bin/jsxgettext'
  }))
  // Restore all the files...
  .pipe(htmlFilter.restore)
  // ... and now filter just the js files
  .pipe(jsFilter)
  .pipe(gulpXgettext({
    bin: 'node_modules/.bin/jsxgettext'
  }))
  // Restore all the files...
  .pipe(jsFilter.restore)
  // Concat all into the 'messages.pot' file
  .pipe(gulpConcatPo('messages.pot', {
    headers: {
      'POT-Creation-Date': new Date().toISOString(),
      'Content-Transfer-Encoding': '8bit',
      'Project-Id-Version': 'PACKAGE VERSION',
      'Language-Team': 'LANGUAGE <LL@li.org>',
      'Content-Type': 'text/plain; charset=utf-8'
    }}))
  .on('error', gutil.log)
  .pipe(gulp.dest('census/locale/templates/LC_MESSAGES'));
}

function updatePo() {
  return exec('./node_modules/.bin/merge-po locale');
}

function compilePo() {
  return exec(
    './node_modules/.bin/compile-json ./census/locale ./census/locale');
}

function compileStyles() {
  return gulpSass(['census/static/scss/styles.scss'])
    // .pipe(minifyCss({compatibility: 'ie8'}))
    .pipe(gulpRename('styles.css'))
    .pipe(gulp.dest('census/static/css'));
}