85 lines
2.9 KiB
JavaScript
85 lines
2.9 KiB
JavaScript
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/*
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Copyright 2013 Daniel Wirtz <dcode@dcode.io>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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var description = "Plain JSON descriptor";
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var ProtoBuf = require(__dirname+"/../../../index.js"),
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util = require(__dirname+"/../util.js"),
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node_path = require("path"),
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fs = require("fs");
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/**
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* pbjs source: Plain JSON descriptor
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* @exports pbjs/sources/json
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* @function
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* @param {!Array.<string>} filenames Source files
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* @param {!Object.<string,*>=} options Options
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* @returns {!ProtoBuf.Builder}
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*/
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var json = module.exports = function(filenames, options) {
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options = options || [];
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var builder = ProtoBuf.newBuilder(util.getBuilderOptions(options, "using")),
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loaded = [];
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filenames.forEach(function(filename) {
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var data = json.load(filename, options, loaded);
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builder["import"](data, filename);
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});
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builder.resolveAll();
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return builder;
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};
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/**
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* Module description.
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* @type {string}
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*/
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json.description = description;
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/**
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* Loads a JSON descriptor including imports.
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* @param {string} filename Source file
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* @param {!Object.<string,*>} options Options
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* @param {!Array.<string>=} loaded An array of already loaded filenames
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* @returns {*} JSON descriptor
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*/
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json.load = function(filename, options, loaded) {
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filename = node_path.resolve(filename);
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loaded = loaded || [];
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if (loaded.indexOf(filename) >= 0)
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return {};
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var data = JSON.parse(fs.readFileSync(filename).toString("utf8")),
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imports = data['imports'];
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loaded.push(filename);
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if (Array.isArray(imports)) {
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for (var i=0; i<imports.length; ++i) {
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// Skip pulled imports and legacy descriptors
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if (typeof imports[i] !== 'string' || (util.isDescriptor(imports[i]) && !options.legacy))
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continue;
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// Merge imports, try include paths
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(function() {
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var path = options.path || [];
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for (var j=0; j<path.length; ++j) {
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var import_filename = node_path.resolve(path[j] + "/", imports[i]);
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if (!fs.existsSync(import_filename))
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continue;
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imports[i] = json.load(import_filename, options, loaded);
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return;
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}
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throw Error("File not found: "+imports[i]);
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})();
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}
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}
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return data;
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};
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