rollup-plugin-ec-lang.js
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/**
* Find language definations.
*
* Usage:
*
* import ecLangPlugin from 'echarts/build/rollup-plugin-ec-lang';
* let rollupConfig = {
* plugins: [
* ecLangPlugin({lang: 'en'}),
* ...
* ]
* };
*/
const {resolve} = require('path');
const {readFileSync} = require('fs');
/**
* @param {Object} [opt]
* @param {string} [opt.lang=null] null/undefined/'' or 'en' or 'fi' or a file path.
*/
function getPlugin(opt) {
let lang = opt && opt.lang || '';
return {
load: function (absolutePath) {
if (/\/src\/lang\.js$/.test(absolutePath)) {
let langPath = getLangFileInfo(lang).absolutePath;
if (langPath) {
absolutePath = langPath;
}
}
return readFileSync(absolutePath, 'utf-8');
}
};
}
/**
* @param {string} lang null/undefined/'' or 'en' or 'fi' or a file path.
* @return {Object} {isOuter, absolutePath}
*/
let getLangFileInfo = getPlugin.getLangFileInfo = function (lang) {
let absolutePath;
let isOuter = false;
if (lang) {
if (/^[a-zA-Z]{2}$/.test(lang)) {
absolutePath = resolve(__dirname, '../', 'src/lang' + lang.toUpperCase() + '.js')
}
else {
isOuter = true;
// `lang` is an absolute path or a relative path based on process.cwd().
absolutePath = resolve(lang);
}
}
return {isOuter, absolutePath};
};
module.exports = getPlugin;