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gulpfile.js
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gulpfile.js
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const config = {
langs: ['zh', 'en'],
langsKeyToGenerate: ['zh'],
compileLang: process.env.COMPILE_LANG || 'zh',
i18nPath: './i18n/',
i18nAttrs: ['title', 'class'],
isProduction: process.env.NODE_ENV === 'production'
};
const { src, dest, series, parallel } = require('gulp');
const gulpFontSpider = require('gulp-font-spider');
const gulpCSSMinify = require('gulp-clean-css');
const gulpHTMLMinify = require('gulp-htmlmin');
const clean = require('gulp-clean');
const cheerio = require('cheerio');
const through = require('through2');
const YAML = require('yaml');
const fs = require('fs');
const cleanUpPreviousBuild = () => src('./dist', { read: false, allowEmpty: true }).pipe(clean());
const cleanUpOriginalFonts = () => src('./dist/**/.font-spider', { read: false }).pipe(clean());
const copyPublicFiles = () => src('./public/**').pipe(dest('./dist/'));
const copyAssets = () => src('./assets/**').pipe(dest('./dist/assets/'));
const copyFonts = () => src('./fonts/**').pipe(dest('./dist/fonts/'));
const fontSpider = () => src('./dist/*.html')
.pipe(gulpFontSpider({ silent: false }))
.pipe(dest('./dist/'))
;
const cssMinify = () => src('./dist/assets/*.css').pipe(gulpCSSMinify({ compatibility: 'ie8' })).pipe(dest('./dist/assets/'));
const htmlMinify = () => src('./dist/*.html').pipe(gulpHTMLMinify({ collapseWhitespace: true })).pipe(dest('./dist/'));
const getLangFileName = (orig, lang) => {
const idxDot = orig.lastIndexOf('.');
const filename = idxDot < 1 ? orig : orig.substring(0, idxDot);
return `${filename}.${lang}.yaml`;
};
const htmlCompile = () => src('./*.html')
.pipe(through.obj(function (file, _, callback) {
if (file.isBuffer()) {
let lang = {};
try {
lang = YAML.parse(fs.readFileSync(config.i18nPath + getLangFileName(file.basename, config.compileLang), 'utf-8'));
} catch (_) {}
const $ = cheerio.load(file.contents.toString(), { decodeEntities: false });
const i18nElements = $(['[i18n]', '[i18n-if]', '[i18n-key]', ...config.i18nAttrs.map(s => `[i18n-${s}]`)].join(',')).map((_, e) => e).get();
for(let i in i18nElements) {
const e = i18nElements[i];
let val;
if (typeof $(e).attr('i18n') === 'string') {
val = lang[$(e).html()];
if (val) {
$(e).html(val);
}
} else if ($(e).attr('i18n-key')) {
val = lang[$(e).attr('i18n-key')];
if (val) {
$(e).html(val);
}
}
$(e).removeAttr('i18n').removeAttr('i18n-key');
config.i18nAttrs.forEach(attr => {
const val = $(e).attr(`i18n-${attr}`);
if (val) {
$(e).attr(attr, lang[val] || val);
}
$(e).removeAttr(`i18n-${attr}`);
});
if (typeof $(e).attr('i18n-if') === 'string') {
if ($(e).attr('i18n-if') === config.compileLang) {
$(e).removeAttr('i18n-if');
} else {
$(e).remove();
}
}
}
const gaTrackId = (process.env.GOOGLE_ANALYTICS_ID || '').trim();
if (gaTrackId) {
$(`<script async src="https://www.googletagmanager.com/gtag/js?id=${gaTrackId}"></script>`).appendTo($('body'));
$(`<script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);}gtag('js', new Date());gtag('config', '${gaTrackId}');</script>`).appendTo($('body'));
}
file.contents = Buffer.from($.html());
this.push(file);
}
return callback();
}))
.pipe(dest('./dist/'))
;
const i18nExtractKeys = () => src('./*.html')
.pipe(through.obj(function (file, _, callback) {
if (file.isBuffer()) {
const $ = cheerio.load(file.contents.toString(), { decodeEntities: false });
const i18nElements = $(['[i18n]', '[i18n-key]', ...config.i18nAttrs.map(s => `[i18n-${s}]`)].join(',')).map((_, e) => e).get();
const keys = {};
for(let i in i18nElements) {
const e = i18nElements[i];
if (typeof $(e).attr('i18n') === 'string') {
keys[$(e).html()] = '';
} else if ($(e).attr('i18n-key')) {
keys[$(e).attr('i18n-key')] = '';
}
config.i18nAttrs.forEach(attr => {
if ($(e).attr(`i18n-${attr}`)) {
keys[$(e).attr(`i18n-${attr}`)] = '';
}
});
}
config.langsKeyToGenerate.forEach(lang => {
const f = file.clone();
f.basename = getLangFileName(file.basename, lang);
const newKeys = { ...keys };
try {
const old = YAML.parse(fs.readFileSync(config.i18nPath + f.basename, 'utf-8'));
Object.entries(old).forEach(([k, v]) => newKeys[k] = v);
} catch (_) {}
f.contents = Buffer.from(YAML.stringify(newKeys));
this.push(f);
});
}
return callback();
}))
.pipe(dest('./i18n/'))
;
const DefaultTasks = [
parallel(
copyAssets,
copyFonts,
copyPublicFiles,
htmlCompile
),
fontSpider,
cleanUpOriginalFonts
];
if (config.isProduction) {
DefaultTasks.push(parallel(
cssMinify,
htmlMinify
));
}
exports.default = series(...DefaultTasks);
exports.clean = cleanUpPreviousBuild;
exports['i18n:extract'] = i18nExtractKeys;