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const gulp = require('gulp')
const zip = require('gulp-zip')
const sass = require('gulp-sass')
const babel = require('gulp-babel')
const qunit = require('gulp-qunit')
const header = require('gulp-header')
const eslint = require('gulp-eslint')
const uglify = require('gulp-uglify')
const rename = require('gulp-rename')
const minify = require('gulp-clean-css')
const connect = require('gulp-connect')
const autoprefixer = require('gulp-autoprefixer')
const yargs = require('yargs')
const pkg = require('./package.json')
const root = yargs.argv.root || '.'
const port = yargs.argv.port || 8000
const license = `/*!
* reveal.js <%= pkg.version %> (<%= new Date().toDateString() %>)
* <%= pkg.homepage %>
* MIT licensed
*
* Copyright (C) 2020 Hakim El Hattab, https://hakim.se
*/\n`
gulp.task('js', () => gulp.src(['./js/reveal.js'])
.pipe(babel({ presets: ['@babel/preset-env'] }))
.pipe(uglify())
.pipe(header(license, {pkg: pkg}))
.pipe(rename('reveal.min.js'))
.pipe(gulp.dest('./js')))
gulp.task('css-themes', () => gulp.src(['./css/theme/source/*.{sass,scss}'])
.pipe(sass())
.pipe(gulp.dest('./css/theme')))
gulp.task('css-core', gulp.series(
() => gulp.src(['css/reveal.scss']).pipe(sass()).pipe(autoprefixer()).pipe(gulp.dest('./css')),
() => gulp.src(['css/reveal.css']).pipe(minify({
compatibility: 'ie9'
})).pipe(header(license, {pkg: pkg}))
.pipe(gulp.dest('./css'))
))
gulp.task('css', gulp.parallel('css-themes', 'css-core'))
gulp.task('test', gulp.series(
() => gulp.src(['./js/reveal.js', 'gulpfile.js']).pipe(eslint()).pipe(eslint.format()),
() => gulp.src(['./test/*.html']).pipe(qunit())
))
gulp.task('default', gulp.series(gulp.parallel('js', 'css'), 'test'))
gulp.task('package', gulp.series('default', () =>
gulp.src([
'./index.html',
'./css/**',
'./js/**',
'./lib/**',
'./images/**',
'./plugin/**',
'./**.md'
]).pipe(zip('reveal-js-presentation.zip')).pipe(gulp.dest('./'))
))
gulp.task('serve', () => {
connect.server({
root: root,
port: port,
livereload: true
})
gulp.watch(['js/reveal.js'], gulp.series('js'))
gulp.watch([
'css/theme/source/*.{sass,scss}',
'css/theme/template/*.{sass,scss}',
], gulp.series('css-themes'))
gulp.watch(['css/reveal.scss'], gulp.series('css-core'))
})
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