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module.exports = function (grunt) {
// var esperanto = require('esperanto');
var rollup = require('rollup').rollup;
// var babel = require('rollup-plugin-babel');
var path = require('path');
var Promise = require('es6-promise').Promise;
var TMP_DIR = 'build/tmp';
function moveComments(code, moveType) {
var comments = [], rest = [], skipId = -1;
code.split('\n').forEach(function (line, i) {
var isComment = false;
if (line.trim().slice(0, 3) === '//!') {
isComment = true;
}
if (isComment && moveType === 'main-only') {
if (i === skipId + 1 ||
line.trim() === '//! moment.js locale configuration') {
skipId = i;
// continue to next line
return;
}
}
if (isComment) {
comments.push(line.trim());
} else {
rest.push(line);
}
});
return comments.concat([''], rest).join('\n');
}
var headerCache = {};
function getHeaderByFile(headerFile) {
if (headerFile === 'none') {
return '';
}
if (!(headerFile in headerCache)) {
headerCache[headerFile] = grunt.file.read(headerFile);
}
return headerCache[headerFile];
}
function rollupBundle(opts) {
// entry, umdName, skipMoment
var rollupOpts = {
input: opts.entry,
plugins: [
// babel({})
]
}, bundleOpts = {
format: 'umd',
name: opts.umdName != null ? opts.umdName : 'not_used'
};
if (opts.skipMoment) {
// And this is what people call progress?
rollupOpts.external = [
'./moment',
'../moment',
'../../moment',
path.resolve('src/moment'),
path.resolve('build/tmp/moment')
];
bundleOpts.globals = {};
bundleOpts.globals[path.resolve('src/moment')] = 'moment';
bundleOpts.globals[path.resolve('build/tmp/moment')] = 'moment';
}
return rollup(rollupOpts).then(function (bundle) {
return bundle.generate(bundleOpts);
}).then(function (result) {
return result.code;
});
}
function transpile(opts) {
// base, entry, skipMoment, headerFile, skipLines, target
var umdName = opts.headerFile != null && opts.headerFile !== 'none' ? 'not_used' : opts.umdName,
headerFile = opts.headerFile ? opts.headerFile : 'templates/default.js',
header = getHeaderByFile(headerFile),
skipLines = opts.skipLines != null ? opts.skipLines : 5;
return rollupBundle({
entry: path.join(opts.base, opts.entry),
skipMoment: opts.skipMoment != null ? opts.skipMoment : false,
umdName: umdName
}).then(function (code) {
var fixed = header + code.split('\n').slice(skipLines).join('\n');
if (opts.moveComments) {
fixed = moveComments(fixed, opts.moveComments);
}
grunt.file.write(opts.target, fixed);
});
}
function transpileMany(opts) {
var batchSize = 50,
promise = Promise.resolve(null),
files = grunt.file.expand({cwd: opts.base}, opts.pattern),
i,
transpileOne = function (i) {
promise = promise.then(function () {
return Promise.all(files.slice(i, i + batchSize).map(function (file) {
return transpile({
base: opts.base,
entry: file,
headerFile: opts.headerFile,
skipMoment: opts.skipMoment,
skipLines: opts.skipLines,
moveComments: opts.moveComments,
target: path.join(opts.targetDir, file)
});
}));
});
};
for (i = 0; i < files.length; i += batchSize) {
transpileOne(i);
}
return promise;
}
function prepareTemp(base) {
var files = grunt.file.expand({cwd: base}, '**/*.js'),
tmpDir = TMP_DIR;
if (grunt.file.exists(tmpDir)) {
return;
}
files.forEach(function (file) {
grunt.file.copy(path.join(base, file), path.join(tmpDir, file));
});
}
function transpileCode(opts) {
var entry = opts.entry || path.basename(opts.target);
prepareTemp(opts.base);
grunt.file.write(path.join(TMP_DIR, entry), opts.code);
return transpile({
base: TMP_DIR,
entry: entry,
umdName: opts.umdName || 'not_used',
headerFile: opts.headerFile,
skipLines: opts.skipLines,
moveComments: opts.moveComments,
target: opts.target,
skipMoment: opts.skipMoment
});
}
function generateLocales(target, localeFiles, opts) {
var files = localeFiles,
code = [
'import moment from "./moment";',
'export default moment;'
].concat(files.map(function (file) {
var identifier = path.basename(file, '.js').replace('-', '_');
return 'import ' + identifier + ' from "./' + file + '";';
})).concat([
// Reset the language back to 'en', because every defineLocale
// also sets it.
'moment.locale(\'en\');'
]).join('\n');
return transpileCode({
base: 'src',
code: code,
target: target,
skipMoment: opts.skipMoment,
headerFile: opts.skipMoment === true ? 'templates/locale-header.js' : 'templates/default.js',
skipLines: opts.skipMoment === true ? 7 : 5
});
}
grunt.task.registerTask('transpile-raw', 'convert es6 to umd', function () {
var done = this.async();
transpile({
base: 'src',
entry: 'moment.js',
umdName: 'moment',
target: 'build/umd/moment.js',
skipLines: 5,
moveComments: true
}).then(function () {
grunt.log.ok('build/umd/moment.js');
}).then(function () {
return transpileMany({
base: 'src',
pattern: 'locale/*.js',
headerFile: 'templates/locale-header.js',
skipLines: 7,
moveComments: true,
targetDir: 'build/umd',
skipMoment: true
});
}).then(function () {
grunt.log.ok('build/umd/locale/*.js');
}).then(function () {
return transpileMany({
base: 'src',
pattern: 'test/moment/*.js',
headerFile: 'templates/test-header.js',
skipLines: 7,
moveComments: true,
targetDir: 'build/umd',
skipMoment: true
});
}).then(function () {
grunt.log.ok('build/umd/test/moment/*.js');
}).then(function () {
return transpileMany({
base: 'src',
pattern: 'test/locale/*.js',
headerFile: 'templates/test-header.js',
skipLines: 7,
moveComments: true,
targetDir: 'build/umd',
skipMoment: true
});
}).then(function () {
grunt.log.ok('build/umd/test/locale/*.js');
}).then(function () {
return generateLocales(
'build/umd/min/locales.js',
grunt.file.expand({cwd: 'src'}, 'locale/*.js'),
{skipMoment: true}
);
}).then(function () {
grunt.log.ok('build/umd/min/locales.js');
}).then(function () {
return generateLocales(
'build/umd/min/moment-with-locales.js',
grunt.file.expand({cwd: 'src'}, 'locale/*.js'),
{skipMoment: false}
);
}).then(function () {
grunt.log.ok('build/umd/min/moment-with-locales.js');
}).then(done, function (e) {
grunt.log.error('error transpiling', e);
done(e);
});
});
grunt.task.registerTask('transpile-custom-raw',
'build just custom language bundles',
function (locales) {
var done = this.async();
var localeFiles = locales.split(',').map(function (locale) {
var file = grunt.file.expand({cwd: 'src'}, 'locale/' + locale + '.js');
if (file.length !== 1) {
// we failed to find a locale
done(new Error('could not find locale: ' + locale));
done = null;
} else {
return file[0];
}
});
// There was an issue with a locale
if (done == null) {
return;
}
return generateLocales(
'build/umd/min/locales.custom.js',
localeFiles,
{skipMoment: true}
).then(function () {
grunt.log.ok('build/umd/min/locales.custom.js');
}).then(function () {
return generateLocales(
'build/umd/min/moment-with-locales.custom.js',
localeFiles,
{skipMoment: false});
}).then(function () {
grunt.log.ok('build/umd/min/moment-with-locales.custom.js');
}).then(function () {
var moment = require('../build/umd/min/moment-with-locales.custom.js');
if (moment.locales().filter(function (locale) {
return locale !== 'en';
}).length !== localeFiles.length) {
throw new Error(
'You probably specified locales requiring ' +
'parent locale, but didn\'t specify parent');
}
}).then(done, function (e) {
grunt.log.error('error transpiling-custom', e);
done(e);
});
});
grunt.config('clean.build', [
'build'
]);
grunt.config('concat.tests', {
src: 'build/umd/test/**/*.js',
dest: 'build/umd/min/tests.js'
});
grunt.task.registerTask('transpile',
'builds all es5 files, optinally creating custom locales',
function (locales) {
var tasks = [
'clean:build',
'transpile-raw',
'concat:tests'
];
if (locales) {
tasks.push('transpile-custom-raw:' + locales);
}
grunt.task.run(tasks);
});
};