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gulpfile.js
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gulpfile.js
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const { src, dest, parallel, series } = require('gulp');
const cleanCSS = require('gulp-clean-css');
const sourcemaps = require('gulp-sourcemaps');
const eslint = require('gulp-eslint-new');
const minify = require('gulp-minify');
const gulpIf = require('gulp-if');
const browserify = require('browserify');
const tap = require('gulp-tap');
const buffer = require('gulp-buffer');
const through = require('through2');
const esprima = require('esprima');
const PO = require('pofile');
const rename = require('gulp-rename');
const { findTranslationCalls, contract } = require('./scripts/localization-util');
const isDevEnvironment = process.env.NODE_ENV === 'dev';
if (isDevEnvironment) {
console.info('❗ Development environment detected.');
}
function copy() {
return src([
'public/admin/**/*',
'public/themes/**/*',
'public/webfonts/**/*',
'public/*.wav',
'public/favicon.ico',
// TODO: minify profile
'public/profile/**/*'], { base: 'public', encoding: false })
.pipe(dest('dist'));
}
function translateHTML(pofile) {
return through.obj(function (file, enc, callback) {
if (file.isBuffer()) {
PO.load(pofile, (error, pofile) => {
if (error) {
callback(error);
} else {
let contents = file.contents.toString();
// replace all instances of {{i18n('Localization', '<localization>') | raw}} with the translation
const regex = /{{i18n\('Localization', '(.+?)'\) \| raw}}/g;
let match;
while ((match = regex.exec(contents)) !== null) {
let [original, localization] = match;
localization = localization
.replace(/\\'/g, '\'');
const item = pofile.items.find(i => i.msgid === localization);
if (!item) {
console.warn(`No translation found for ${localization}`);
}
const replace = (item && item.msgstr[0]) || original;
contents = contents.replace(localization, replace);
}
file.contents = Buffer.from(contents);
callback(null, file);
}
});
} else {
callback(new Error('Expected buffer'));
}
});
}
function html() {
return src(['po/*.po'])
.pipe(through.obj(function (file, enc, callback) {
const codeIndex = file.basename.lastIndexOf('_');
const extIndex = file.basename.lastIndexOf('.');
const langcode = codeIndex === -1
? ''
: file.basename.substring(codeIndex, extIndex === -1
? file.basename.length
: extIndex);
// Source HTML files that don't need to be translated
src([
'public/auth_done.html',
'public/mobile_captcha.html'
], { read: true })
.pipe(buffer())
.pipe(dest('dist'));
// Source all other HTML files
src([
'public/**/*.html',
'!public/auth_done.html',
'!public/mobile_captcha.html'
], { read: true })
.pipe(buffer())
.pipe(translateHTML(file.path))
.pipe(rename({ suffix: langcode }))
.pipe(dest('dist'))
.once('end', callback);
}));
}
function css() {
return src('public/*.css')
.pipe(gulpIf(isDevEnvironment, sourcemaps.init()))
.pipe(cleanCSS())
.pipe(gulpIf(isDevEnvironment, sourcemaps.write()))
.pipe(dest('dist'));
}
function minJS() {
return src('public/*.min.js')
.pipe(dest('dist'));
}
// NOTE ([ ]): pattern for all non-minified .js files
const SOURCE_FILES = [
'public/**/*.js',
'!public/**/*.min.js',
'!public/**/*-min.js',
'!public/include/**/*.js',
'!public/profile/**/*.js',
'!public/SLIDEIN.js',
'!public/serviceWorker.js'
];
const NON_TRANSLATED_SOURCE_FILES = [
'public/SLIDEIN.js',
'public/serviceWorker.js'
];
function lint() {
return src(SOURCE_FILES)
.pipe(eslint())
.pipe(eslint.failAfterError());
}
function translate(pofile) {
return through.obj(function (file, enc, callback) {
if (file.isBuffer()) {
PO.load(pofile, (error, pofile) => {
if (error) {
callback(error);
} else {
let contents = file.contents.toString();
const script = esprima.parseScript(contents, { range: true });
const translationCalls = script.body
.map(findTranslationCalls)
.flat()
.sort((a, b) => a.range.start - b.range.start);
let offset = 0;
for (const call of translationCalls) {
const [argument] = call.arguments;
const [start, end] = call.range;
const length = end - start;
const original = contract(contents.substring(...argument.range.map(p => p + offset)), 1);
const quote = contents[argument.range[0] + offset];
const item = pofile.items.find(i => i.msgid === original);
const replaceContent = (item && item.msgstr[0]) || original;
const replace = quote + replaceContent.replace(new RegExp(`([^\\\\])([${quote}])`, 'g'), '$1\\$2') + quote;
// just in case something goes wrong
if (contents.substring(start + offset, start + offset + 2) !== '__') {
callback(new Error('Translation offset drift'));
}
contents = contents.substring(0, offset + start) + replace + contents.substring(offset + end);
offset += replace.length - length;
}
file.contents = Buffer.from(contents);
callback(null, file);
}
});
} else {
callback(new Error('Expected buffer'));
}
});
}
function srcJS() {
return src(['po/*.po'])
.pipe(through.obj(function (file, enc, callback) {
const codeIndex = file.basename.lastIndexOf('_');
const extIndex = file.basename.lastIndexOf('.');
const langcode = codeIndex === -1
? ''
: file.basename.substring(codeIndex, extIndex === -1
? file.basename.length
: extIndex);
src(NON_TRANSLATED_SOURCE_FILES, { read: false })
.pipe(tap(file => {
file.contents = browserify(file.path, { debug: isDevEnvironment })
.bundle();
}))
.pipe(buffer())
.pipe(gulpIf(isDevEnvironment, sourcemaps.init({ loadMaps: true })))
.pipe(gulpIf(isDevEnvironment, sourcemaps.write()))
.pipe(dest('dist'));
src(SOURCE_FILES, { read: false })
.pipe(tap(file => {
file.contents = browserify(file.path, { debug: isDevEnvironment })
.bundle();
}))
.pipe(buffer())
.pipe(translate(file.path))
.pipe(gulpIf(isDevEnvironment, sourcemaps.init({ loadMaps: true })))
.pipe(minify({
ext: {
src: '.src.js',
min: '.js'
}
}))
.pipe(gulpIf(isDevEnvironment, sourcemaps.write()))
.pipe(rename({ suffix: langcode }))
.pipe(dest('dist'))
.once('end', callback);
}));
}
exports.html = html;
exports.css = css;
exports.minJS = minJS;
exports.srcJS = srcJS;
exports.lint = lint;
exports.copy = copy;
exports.default = parallel(html, css, minJS, series(lint, srcJS), copy);