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build/node_modules/google-closure-compiler-js/cmd.js

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+#!/usr/bin/env node
+/*
+ * Copyright 2016 The Closure Compiler Authors.
+ *
+ * Licensed 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.
+ */
+
+/**
+ * @fileoverview Command-line interface for Google Closure Compiler in JS
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const minimist = require('minimist');
+const compile = require('./compile.js');
+const logger = require('./logger.js');
+
+const argv = minimist(process.argv.slice(2), {
+  alias: {h: 'help', v: 'version'},
+});
+if (argv.help) {
+  const helpfile = path.join(__dirname, 'usage.txt');
+  return fs.readFile(helpfile, 'utf8', (err, src) => {
+    if (err) {
+      error(err)
+    } else {
+      console.log(src);
+    }
+  });
+}
+if (argv.version) {
+  return console.log(require('./package.json').version);
+}
+
+const infiles = argv._.concat(toArray(argv.jsCode));  // treat jsCode as _
+if (infiles.length === 0) {
+  infiles.push(null);  // if no files were specified, read from stdin
+}
+const sources = readAllFiles(infiles);
+delete argv._;
+delete argv.jsCode;
+
+const externs = readAllFiles(toArray(argv.externs));
+delete argv.externs;
+
+Promise.all([sources, externs]).then(arr => ready(...arr)).catch(error);
+
+/**
+ * Minimist gives us a string, array or null: normalize to array.
+ *
+ * @param {(string|Array<string>)}
+ * @return {!Array<string>}
+ */
+function toArray(arg) {
+  if (typeof arg === 'string') {
+    return [arg];
+  } else if (arg) {
+    return arg;
+  } else {
+    return [];
+  }
+}
+
+/**
+ * @param {!Array<string>} paths
+ * @return {!Promise<!Array{src: string, path: string}>>}
+ */
+function readAllFiles(paths) {
+  return Promise.all(paths.map(path => readFile(path)));
+}
+
+/**
+ * @param {?string} path
+ * @return {!Promise<{src: string, path: string}>}
+ */
+function readFile(path) {
+  return new Promise((resolve, reject) => {
+    if (path === null) {
+      let src = '';
+      process.stdin.resume();
+      process.stdin.on('data', buf => src += buf.toString());
+      process.stdin.on('end', () => resolve({src, path: '-'}));
+    } else {
+      fs.readFile(path, 'utf8', (err, src) => err ? reject(err) : resolve({src, path}));
+    }
+  });
+}
+
+/**
+ * @param {!Array<{src: string, path: string}>} sources
+ * @param {!Array<{src: string, path: string}>} externs
+ */
+function ready(sources, externs) {
+  const flags = Object.assign(Object.assign({}, argv), {jsCode: sources, externs: externs});
+  const output = compile(flags);
+
+  let code = 0;
+  if (logger(flags, output)) {
+    code = 1;
+  }
+  console.log(output.compiledCode);
+
+  process.exit(code);
+}
+
+function error(err) {
+  console.error(err);
+  process.exit(1);
+}