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eugene-matvejeveugene-matvejev
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init commit. tests will be added later
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‎index.js‎

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'use strict';
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let fs = require('fs');
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// let packageJsonPath = `${process.cwd()}/package.json`,
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let packageJsonPath = `${process.cwd()}/tests/fixtures/package.json`,
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packageJsonContent = fs.readFileSync(packageJsonPath);
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/** @param {{extra: {node_parameter_handler: []}}} content */
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let packageJson = JSON.parse(packageJsonContent),
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Processor = require('./src/processor'),
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processor = new Processor(packageJson.extra.node_parameter_handler, process.cwd());
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processor.process();
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processor.write();

‎lib/file.js‎

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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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var File = function File() {
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_classCallCheck(this, File);
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};
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exports.default = File;

‎lib/processor.js‎

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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
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var _file = require("./file");
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var _file2 = _interopRequireDefault(_file);
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var _fs = require("fs");
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var _fs2 = _interopRequireDefault(_fs);
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var _deepmerge = require("deepmerge");
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var _deepmerge2 = _interopRequireDefault(_deepmerge);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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var Processor = function () {
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// config;
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// cwd;
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// files;
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function Processor(config, cwd) {
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var files = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];
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_classCallCheck(this, Processor);
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}
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_createClass(Processor, [{
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key: "process",
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value: function process() {
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var _iteratorNormalCompletion = true;
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var _didIteratorError = false;
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var _iteratorError = undefined;
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try {
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for (var _iterator = this.config[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
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var config = _step.value;
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var file = this.processFile(config);
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this.files.push(file);
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}
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} catch (err) {
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_didIteratorError = true;
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_iteratorError = err;
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} finally {
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try {
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if (!_iteratorNormalCompletion && _iterator.return) {
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_iterator.return();
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}
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} finally {
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if (_didIteratorError) {
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throw _iteratorError;
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}
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}
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}
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}
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}, {
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key: "processFile",
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value: function processFile(config) {
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var file = new _file2.default();
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var pathSource = this.resolvePath(config.source),
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pathOutput = this.resolvePath(config.output);
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var packageJsonPath = this.resolvePath(pathSource),
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packageJsonContent = _fs2.default.readFileSync(packageJsonPath);
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/** @param {{extra: {}}} content */
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var packageJson = JSON.parse(packageJsonContent),
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solvedJson = this.resolveOverwritten(config),
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completedJson = this.constructor.getMergedData(packageJson, solvedJson);
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file.source = pathSource;
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file.output = pathOutput;
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file.contex = completedJson;
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return file;
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}
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/**
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* @param {string} path
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*/
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}, {
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key: "resolvePath",
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value: function resolvePath(path) {
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if ('/' === path.charAt(0)) {
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return path;
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}
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return this.cwd + "/" + path;
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}
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}, {
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key: "resolveOverwritten",
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value: function resolveOverwritten(params) {
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var object = {};
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var _iteratorNormalCompletion2 = true;
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var _didIteratorError2 = false;
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var _iteratorError2 = undefined;
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try {
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for (var _iterator2 = Object.keys(params)[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
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var abstractPath = _step2.value;
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var envVariable = params[abstractPath],
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value = this.constructor.getEnvironmentValue(envVariable);
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this.constructor.overwriteObjectFieldValue(abstractPath, value, object);
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}
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} catch (err) {
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_didIteratorError2 = true;
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_iteratorError2 = err;
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} finally {
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try {
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if (!_iteratorNormalCompletion2 && _iterator2.return) {
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_iterator2.return();
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}
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} finally {
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if (_didIteratorError2) {
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throw _iteratorError2;
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}
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}
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}
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}
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}], [{
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key: "getEnvironmentValue",
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value: function getEnvironmentValue(index) {
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return process.env[index] || undefined;
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}
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}, {
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key: "getMergedData",
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value: function getMergedData(data, overwrittenData) {
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return (0, _deepmerge2.default)(data, overwrittenData);
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}
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}, {
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key: "overwriteObjectFieldValue",
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value: function overwriteObjectFieldValue(abstractPath, value, object, delimiter) {
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if (undefined === value) {
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return;
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}
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delimiter = undefined !== delimiter ? delimiter : '.';
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var indexes = abstractPath.split(delimiter),
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lastPartIndex = indexes.length - 1;
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for (var i = 0; i <= lastPartIndex; i++) {
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var index = indexes[i];
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if (i === lastPartIndex) {
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object[index] = value;
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break;
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}
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if (undefined === object[index]) {
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object[index] = {};
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}
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object = object[index];
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}
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}
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}]);
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return Processor;
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}();
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exports.default = Processor;

‎package.json‎

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{
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"name": "node-parameter-handler",
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"version": "0.1.0",
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"description": "test",
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"main": "index.js",
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"scripts": {
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"test": "test"
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},
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"repository": {
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"type": "git",
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"url": "git+https://github.com/eugene-matvejev/node.js-parameter-handler.git"
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},
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"keywords": [
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"test"
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],
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"author": "eugene matvejev",
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"license": "MIT",
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"bugs": {
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"url": "https://github.com/eugene-matvejev/node.js-parameter-handler/issues"
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},
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"homepage": "https://github.com/eugene-matvejev/node.js-parameter-handler#readme",
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"dependencies": {
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"deepmerge": "^1.3.1",
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"jsonfile": "^2.4.0"
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}
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}

‎src/file.js‎

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module.exports = class File {
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}

‎src/processor.js‎

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let File = require('./file');
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let fs = require('fs');
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let deepmerge = require('deepmerge');
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module.exports = class Processor {
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constructor(config, cwd) {
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this.config = config;
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this.cwd = cwd;
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}
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process() {
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this.files = [];
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this.config.forEach(config => {
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let file = this.processFile(config);
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this.files.push(file);
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})
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}
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write() {
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this.files.forEach(file => fs.writeFile(file.output, JSON.stringify(file.content, null, 2), 'UTF-8'));
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}
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/**
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* @param {{envMap: {}, output: string, source: string}} config
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*
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* @returns {*}
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*/
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processFile(config) {
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let file = new File();
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let pathSource = this.resolvePath(config.source),
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pathOutput = this.resolvePath(config.output);
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let packageJsonPath = this.resolvePath(pathSource),
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packageJsonContent = fs.readFileSync(packageJsonPath);
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/** @param {{extra: {}}} content */
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let packageJson = JSON.parse(packageJsonContent),
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solvedJson = this.resolveOverwritten(config.envMap),
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completedJson = this.constructor.getMergedData(packageJson, solvedJson);
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file.source = pathSource;
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file.output = pathOutput;
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file.content = completedJson;
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return file;
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}
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/**
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* @param {string} path
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*/
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resolvePath(path) {
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if ('/' === path.charAt(0)) {
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return path;
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}
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return `${this.cwd}/${path}`;
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}
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resolveOverwritten(envMapping) {
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let object = {};
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for (let abstractPath of Object.keys(envMapping)) {
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let envVariable = envMapping[abstractPath],
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value = this.constructor.getEnvironmentValue(envVariable);
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this.constructor.overwriteObjectFieldValue(abstractPath, value, object)
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}
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return object;
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}
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static getEnvironmentValue(index) {
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return process.env[index] || undefined;
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}
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static getMergedData(data, overwrittenData) {
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return deepmerge(data, overwrittenData);
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}
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static overwriteObjectFieldValue(abstractPath, value, object, delimiter) {
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if (undefined === value) {
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return;
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}
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delimiter = undefined !== delimiter ? delimiter : '.';
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let indexes = abstractPath.split(delimiter),
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lastPartIndex = indexes.length - 1;
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for (let i = 0; i <= lastPartIndex; i++) {
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let index = indexes[i];
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if (i === lastPartIndex) {
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object[index] = value;
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break;
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}
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if (undefined === object[index]) {
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object[index] = {};
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}
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object = object[index];
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}
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}
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};

‎tests/fixtures/package.json‎

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{
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"extra": {
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"node_parameter_handler": [
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{
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"source": "tests/fixtures/settings.json.dist",
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"output": "var/settings.json",
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"envMap": {
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"touched": "BASE_URL",
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"test.touched": "PWD",
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"test.test.touched": "HOME"
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}
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}
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]
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}
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}

‎tests/fixtures/settings.json.dist‎

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{
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"touched": "to be replaced",
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"untouched": "untouched",
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"test": {
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"touched": "to be replaced",
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"untouched": "untouched",
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"test": {
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"touched": "to be replaced",
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"untouched": "untouched"
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}
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}
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}

‎var/.gitkeep‎

Whitespace-only changes.

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