bemjson-from-datajson-i18n.js

/**
 * bemjson-from-datajson-i18n
 * ======================
 *
 * Собирает *bemjson*-файл с помощью *datajson.{lang}*, *bemtree*, *lang.all* и *lang.{lang}*.
 *
 * **Опции**
 *
 * * *String* **bemtreeFile** — Исходный BEMTREE-файл. По умолчанию — `?.bemtree.js`.
 * * *String* **datajsonFiles** — Хэш с исходными datajson-файлами. ({d1: "path/to/json1", d2: "path/to/json2})
 * * *String* **langAllFile** — Исходный langAll-файл. По умолчанию — `?.lang.all.js`.
 * * *String* **langFile** — Исходный lang-файл. По умолчанию — `?.lang.{lang}.js`.
 *   Если параметр lang не указан, берется первый из объявленных в проекте языков
 * * *String* **target** — Результирующий HTML-файл. По умолчанию — `?.{lang}.html`.
 *
 */
 
var Vow = require("../../node_modules/enb/node_modules/vow/lib/vow");
var vm = require("vm");
var vfs = require("../../node_modules/enb/lib/fs/async-fs");
var requireOrEval = require("../../node_modules/enb/lib/fs/require-or-eval");
var asyncRequire = require("../../node_modules/enb/lib/fs/async-require");
var dropRequireCache = require("../../node_modules/enb/lib/fs/drop-require-cache");
var path = require("path"),
    fs = require("fs");
 
module.exports = require("enb/lib/build-flow").create()
    .name("bemjson-from-datajson-i18n")
    .target("target", "?.{lang}.html")
    .useSourceFilename("bemtreeFile", "?.bemtree.js")
    .useSourceFilename("langAllFile", "?.lang.all.js")
    .useSourceFilename("langFile", "?.lang.{lang}.js")
    .prepare(function () {
        this._datajsonSources = this.getOption("datajsonFiles");
        this._dataJsonArray = Object.keys(this._datajsonSources).map(function (key) {
            return {
                name: key,
                file: this._datajsonSources[key]
            };
        }, this);
    })
    .needRebuild(function (cache) {
        var dataFilesChanged = this._dataJsonArray.filter(function (item) {
            return cache.needRebuildFile("datajson-file-" + item.name, this.node.resolvePath(item.file));
        }, this).length > 0;
        return cache.needRebuildFile("bemtree-file", this.node.resolvePath(this._bemtreeFile)) ||
            dataFilesChanged ||
            cache.needRebuildFile("allLang-file", this.node.resolvePath(this._allLangFile)) ||
            cache.needRebuildFile("lang-file", this.node.resolvePath(this._langFile)) ||
            cache.needRebuildFile("html-file", this.node.resolvePath(this._target));
    })
    .saveCache(function (cache) {
        cache.cacheFileInfo("bemtree-file", this.node.resolvePath(this._bemtreeFile));
        cache.cacheFileInfo("allLang-file", this.node.resolvePath(this._allLangFile));
        cache.cacheFileInfo("lang-file", this.node.resolvePath(this._langFile));
        cache.cacheFileInfo("html-file", this.node.resolvePath(this._target));
        this._dataJsonArray.forEach(function (dataSource) {
            cache.cacheFileInfo("datajson-file-" + dataSource.name, dataSource.file);
        }, this);
    })
    .builder(function (bemtreeFilename, allLangFilename, langFilename) {
        var self = this,
            dataFiles = this._dataJsonArray.map(function (dataSource) {
                dropRequireCache(require, self.node.resolvePath(dataSource.file));
                dataSource.file = self.node.resolvePath(dataSource.file);
                return dataSource;
            }),
            promises = dataFiles.map(function (dataFile) {
                return requireOrEval(dataFile.file).then(function (data) {
                    dataFile.data = data;
                    return dataFile;
                });
            });
        return Vow.all(promises).then(function (dataSources) {
            var datajson = {};
            dataSources.forEach(function (item) {
                datajson[item.name] = item.data;
            });
            return Vow.all([
                asyncRequire(bemtreeFilename),
                vfs.read(allLangFilename),
                vfs.read(langFilename)
            ]).spread(function (bemtree, allLangSource, langSource) {
                vm.runInThisContext(allLangSource, allLangFilename);
                vm.runInThisContext(langSource, langFilename);
 
                return bemtree.BEMTREE.apply(datajson).then(function (bemjson) {
                    return "module.exports = " + JSON.stringify(bemjson, null, self.getOption("debug") ? 4 : 0) + ";";
                });
            });
        });
 
    })
    .createTech();