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gulpfile.js
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gulpfile.js
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/* eslint-disable no-console */
/* eslint-env node */
'use strict';
const del = require('del');
const fs = require('fs');
const gulp = require('gulp');
const path = require('path');
const gulpif = require('gulp-if');
const uglifyes = require('uglify-es');
const composer = require('gulp-uglify/composer');
const cssSlam = require('css-slam').gulp;
const mergeStream = require('merge-stream');
const polymerBuild = require('polymer-build');
const browserSync = require('browser-sync').create();
const history = require('connect-history-api-fallback');
const eslint = require('gulp-eslint');
const friendlyFormatter = require('eslint-friendly-formatter');
const run = require('gulp-run');
const HtmlSplitter = polymerBuild.HtmlSplitter;
const PolymerProject = polymerBuild.PolymerProject;
const uglify = composer(uglifyes, console);
const config = {
polymerJsonPath: './polymer.json',
build: {
rootDirectory: 'build',
},
swPrecacheConfigPath: './sw-precache-config.js',
templateData: [
`${getConfigPath()}`,
'data/settings',
'data/resources',
],
tempDirectory: '.temp',
};
const swPrecacheConfig = require(config.swPrecacheConfigPath);
const polymerJson = require(config.polymerJsonPath);
const buildPolymerJson = {
entrypoint: prependPath(config.tempDirectory, polymerJson.entrypoint),
shell: prependPath(config.tempDirectory, polymerJson.shell),
fragments: polymerJson.fragments.reduce((res, el) =>
[...res, prependPath(config.tempDirectory, el)], []),
sources: polymerJson.sources.reduce((res, el) =>
[...res, prependPath(config.tempDirectory, el)], []),
extraDependencies: polymerJson.extraDependencies,
};
const normalize = require('./gulp-tasks/normalize.js');
const template = require('./gulp-tasks/template.js');
// const images = require('./gulp-tasks/images.js');
const html = require('./gulp-tasks/html.js');
function build() {
return new Promise((resolve) => {
let polymerProject = null;
console.log(`Deleting ${config.build.rootDirectory}` +
` and ${config.tempDirectory} directories...`);
del([config.build.rootDirectory, config.tempDirectory])
.then(() => {
console.log(`Compiling template...`);
const compileStream = template.compile(config, polymerJson)
.on('end', () => {
polymerProject = new PolymerProject(buildPolymerJson);
});
return waitFor(compileStream);
})
.then(() => {
console.log(`Polymer building...`);
const sourcesHtmlSplitter = new HtmlSplitter();
const sourcesStream = polymerProject.sources()
.pipe(sourcesHtmlSplitter.split())
// .pipe(gulpif(/\.js$/, uglify()))
.pipe(gulpif(/\.(html|css)$/, cssSlam()))
.pipe(gulpif(/\.html$/, html.minify()))
// .pipe(gulpif(/\.(png|gif|jpg|svg)$/, images.minify()))
.pipe(sourcesHtmlSplitter.rejoin());
const dependenciesHtmlSplitter = new HtmlSplitter();
const dependenciesStream = polymerProject.dependencies()
.pipe(dependenciesHtmlSplitter.split())
// Doesn't work for now
// .pipe(gulpif(/\.js$/, uglify()))
.pipe(gulpif(/\.(html|css)$/, cssSlam()))
.pipe(gulpif(/\.html$/, html.minify()))
.pipe(dependenciesHtmlSplitter.rejoin());
let buildStream = mergeStream(sourcesStream, dependenciesStream)
.once('data', () => {
console.log('Analyzing and optimizing...');
});
buildStream = buildStream.pipe(polymerProject.bundler({
stripComments: true,
}));
buildStream = buildStream.pipe(gulp.dest(config.build.rootDirectory));
return waitFor(buildStream);
})
.then(() => {
console.log('Generating the Service Worker...');
return polymerBuild.addServiceWorker({
project: polymerProject,
buildRoot: prependPath(
config.build.rootDirectory,
config.tempDirectory
)
.replace('\\', '/'),
bundled: config.build.bundled,
swPrecacheConfig,
});
})
.then(() => {
console.log('Normalizing...');
const normalizeStream = normalize(config)
.on('end', () => {
del([prependPath(
config.build.rootDirectory,
config.tempDirectory
)]);
});
return waitFor(normalizeStream);
})
.then(() => {
return gulp.src(prependPath(
config.build.rootDirectory,
'service-worker.js'
))
.pipe(uglify())
.pipe(gulp.dest(config.build.rootDirectory));
})
.then(() => {
console.log('Build complete!');
resolve();
});
});
}
function lint() {
return gulp.src([
`scripts/**/*.js`,
`src/**/*.{html,js}`,
'index.html',
])
.pipe(eslint())
.pipe(eslint.format(friendlyFormatter))
.pipe(eslint.failAfterError());
}
function deploy() {
let metadata = {};
for (let file of config.templateData) {
metadata = Object.assign({}, metadata, require(path.join(process.cwd(), file)));
}
return run(`firebase use ${metadata.firebase.projectId} && firebase deploy`).exec();
}
function waitFor(stream) {
return new Promise((resolve, reject) => {
stream.on('end', resolve);
stream.on('error', reject);
});
}
function reload(done) {
browserSync.reload();
done();
}
function compileTemplate() {
return del([config.tempDirectory])
.then(() => {
return waitFor(template.compile(config, polymerJson));
});
}
function copyStatic() {
return gulp.src([
'data/**/*.{markdown,md}',
'images/**/*.{png,gif,jpg,svg}',
], {
base: '.',
})
.pipe(gulp.dest(config.tempDirectory));
}
function prependPath(pre, to) {
return `${pre}/${to}`;
}
function getConfigPath() {
const path = process.env.BUILD_ENV ? `config/${process.env.BUILD_ENV}` : 'config/development';
if (!fs.existsSync(`${path}.json`)) {
console.error(`ERROR: Config path '${path}' does not exists. Please, add/use production|development.json files.`);
return null;
}
console.log(`File path ${path}.json selected as config...`);
return path;
}
gulp.task('default', build);
gulp.task('default', gulp.series(lint, build));
gulp.task('lint', lint);
gulp.task('deploy', deploy);
gulp.task('serve', gulp.series(compileTemplate, () => {
browserSync.init({
port:8080,
logPrefix: 'Hoverboard 2',
notify: false,
server: {
baseDir: [config.tempDirectory, './'],
middleware: [history()],
},
});
gulp.watch([
'data/**/*.{markdown,md}',
'images/**/*.{png,gif,jpg,svg}',
], gulp.series(copyStatic, reload));
gulp.watch([
'data/**/*.json',
'scripts/**/*.js',
'src/**/*.html',
'*.{html,js}',
'manifest.json',
], gulp.series(compileTemplate, reload));
}));