383 lines
15 KiB
JavaScript
383 lines
15 KiB
JavaScript
// Generated by CoffeeScript 2.0.0-beta4
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(function() {
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// CoffeeScript can be used both on the server, as a command-line compiler based
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// on Node.js/V8, or to run CoffeeScript directly in the browser. This module
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// contains the main entry functions for tokenizing, parsing, and compiling
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// source CoffeeScript into JavaScript.
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var Lexer, SourceMap, base64encode, checkShebangLine, compile, formatSourcePosition, getSourceMap, helpers, lexer, packageJson, parser, sourceMaps, sources, withPrettyErrors;
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({Lexer} = require('./lexer'));
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({parser} = require('./parser'));
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helpers = require('./helpers');
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SourceMap = require('./sourcemap');
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// Require `package.json`, which is two levels above this file, as this file is
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// evaluated from `lib/coffeescript`.
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packageJson = require('../../package.json');
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// The current CoffeeScript version number.
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exports.VERSION = packageJson.version;
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exports.FILE_EXTENSIONS = ['.coffee', '.litcoffee', '.coffee.md'];
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// Expose helpers for testing.
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exports.helpers = helpers;
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// Function that allows for btoa in both nodejs and the browser.
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base64encode = function(src) {
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switch (false) {
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case typeof Buffer !== 'function':
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return Buffer.from(src).toString('base64');
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case typeof btoa !== 'function':
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// The contents of a `<script>` block are encoded via UTF-16, so if any extended
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// characters are used in the block, btoa will fail as it maxes out at UTF-8.
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// See https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#The_Unicode_Problem
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// for the gory details, and for the solution implemented here.
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return btoa(encodeURIComponent(src).replace(/%([0-9A-F]{2})/g, function(match, p1) {
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return String.fromCharCode('0x' + p1);
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}));
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default:
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throw new Error('Unable to base64 encode inline sourcemap.');
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}
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};
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// Function wrapper to add source file information to SyntaxErrors thrown by the
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// lexer/parser/compiler.
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withPrettyErrors = function(fn) {
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return function(code, options = {}) {
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var err;
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try {
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return fn.call(this, code, options);
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} catch (error) {
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err = error;
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if (typeof code !== 'string') { // Support `CoffeeScript.nodes(tokens)`.
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throw err;
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}
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throw helpers.updateSyntaxError(err, code, options.filename);
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}
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};
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};
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// For each compiled file, save its source in memory in case we need to
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// recompile it later. We might need to recompile if the first compilation
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// didn’t create a source map (faster) but something went wrong and we need
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// a stack trace. Assuming that most of the time, code isn’t throwing
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// exceptions, it’s probably more efficient to compile twice only when we
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// need a stack trace, rather than always generating a source map even when
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// it’s not likely to be used. Save in form of `filename`: `(source)`
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sources = {};
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// Also save source maps if generated, in form of `filename`: `(source map)`.
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sourceMaps = {};
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// Compile CoffeeScript code to JavaScript, using the Coffee/Jison compiler.
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// If `options.sourceMap` is specified, then `options.filename` must also be
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// specified. All options that can be passed to `SourceMap#generate` may also
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// be passed here.
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// This returns a javascript string, unless `options.sourceMap` is passed,
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// in which case this returns a `{js, v3SourceMap, sourceMap}`
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// object, where sourceMap is a sourcemap.coffee#SourceMap object, handy for
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// doing programmatic lookups.
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exports.compile = compile = withPrettyErrors(function(code, options) {
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var currentColumn, currentLine, encoded, extend, filename, fragment, fragments, generateSourceMap, header, i, j, js, len, len1, map, merge, newLines, ref, ref1, sourceMapDataURI, sourceURL, token, tokens, v3SourceMap;
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({merge, extend} = helpers);
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options = extend({}, options);
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// Always generate a source map if no filename is passed in, since without a
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// a filename we have no way to retrieve this source later in the event that
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// we need to recompile it to get a source map for `prepareStackTrace`.
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generateSourceMap = options.sourceMap || options.inlineMap || (options.filename == null);
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filename = options.filename || '<anonymous>';
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checkShebangLine(filename, code);
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sources[filename] = code;
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if (generateSourceMap) {
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map = new SourceMap;
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}
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tokens = lexer.tokenize(code, options);
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// Pass a list of referenced variables, so that generated variables won’t get
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// the same name.
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options.referencedVars = (function() {
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var i, len, results;
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results = [];
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for (i = 0, len = tokens.length; i < len; i++) {
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token = tokens[i];
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if (token[0] === 'IDENTIFIER') {
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results.push(token[1]);
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}
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}
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return results;
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})();
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// Check for import or export; if found, force bare mode.
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if (!((options.bare != null) && options.bare === true)) {
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for (i = 0, len = tokens.length; i < len; i++) {
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token = tokens[i];
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if ((ref = token[0]) === 'IMPORT' || ref === 'EXPORT') {
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options.bare = true;
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break;
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}
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}
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}
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fragments = parser.parse(tokens).compileToFragments(options);
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currentLine = 0;
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if (options.header) {
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currentLine += 1;
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}
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if (options.shiftLine) {
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currentLine += 1;
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}
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currentColumn = 0;
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js = "";
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for (j = 0, len1 = fragments.length; j < len1; j++) {
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fragment = fragments[j];
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// Update the sourcemap with data from each fragment.
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if (generateSourceMap) {
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// Do not include empty, whitespace, or semicolon-only fragments.
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if (fragment.locationData && !/^[;\s]*$/.test(fragment.code)) {
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map.add([fragment.locationData.first_line, fragment.locationData.first_column], [currentLine, currentColumn], {
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noReplace: true
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});
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}
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newLines = helpers.count(fragment.code, "\n");
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currentLine += newLines;
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if (newLines) {
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currentColumn = fragment.code.length - (fragment.code.lastIndexOf("\n") + 1);
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} else {
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currentColumn += fragment.code.length;
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}
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}
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// Copy the code from each fragment into the final JavaScript.
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js += fragment.code;
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}
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if (options.header) {
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header = `Generated by CoffeeScript ${this.VERSION}`;
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js = `// ${header}\n${js}`;
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}
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if (generateSourceMap) {
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v3SourceMap = map.generate(options, code);
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sourceMaps[filename] = map;
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}
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if (options.inlineMap) {
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encoded = base64encode(JSON.stringify(v3SourceMap));
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sourceMapDataURI = `//# sourceMappingURL=data:application/json;base64,${encoded}`;
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sourceURL = `//# sourceURL=${(ref1 = options.filename) != null ? ref1 : 'coffeescript'}`;
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js = `${js}\n${sourceMapDataURI}\n${sourceURL}`;
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}
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if (options.sourceMap) {
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return {
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js,
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sourceMap: map,
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v3SourceMap: JSON.stringify(v3SourceMap, null, 2)
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};
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} else {
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return js;
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}
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});
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// Tokenize a string of CoffeeScript code, and return the array of tokens.
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exports.tokens = withPrettyErrors(function(code, options) {
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return lexer.tokenize(code, options);
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});
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// Parse a string of CoffeeScript code or an array of lexed tokens, and
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// return the AST. You can then compile it by calling `.compile()` on the root,
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// or traverse it by using `.traverseChildren()` with a callback.
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exports.nodes = withPrettyErrors(function(source, options) {
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if (typeof source === 'string') {
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return parser.parse(lexer.tokenize(source, options));
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} else {
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return parser.parse(source);
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}
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});
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// This file used to export these methods; leave stubs that throw warnings
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// instead. These methods have been moved into `index.coffee` to provide
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// separate entrypoints for Node and non-Node environments, so that static
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// analysis tools don’t choke on Node packages when compiling for a non-Node
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// environment.
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exports.run = exports.eval = exports.register = function() {
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throw new Error('require index.coffee, not this file');
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};
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// Instantiate a Lexer for our use here.
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lexer = new Lexer;
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// The real Lexer produces a generic stream of tokens. This object provides a
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// thin wrapper around it, compatible with the Jison API. We can then pass it
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// directly as a "Jison lexer".
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parser.lexer = {
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lex: function() {
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var tag, token;
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token = parser.tokens[this.pos++];
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if (token) {
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[tag, this.yytext, this.yylloc] = token;
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parser.errorToken = token.origin || token;
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this.yylineno = this.yylloc.first_line;
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} else {
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tag = '';
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}
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return tag;
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},
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setInput: function(tokens) {
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parser.tokens = tokens;
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return this.pos = 0;
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},
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upcomingInput: function() {
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return '';
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}
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};
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// Make all the AST nodes visible to the parser.
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parser.yy = require('./nodes');
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// Override Jison's default error handling function.
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parser.yy.parseError = function(message, {token}) {
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var errorLoc, errorTag, errorText, errorToken, tokens;
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// Disregard Jison's message, it contains redundant line number information.
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// Disregard the token, we take its value directly from the lexer in case
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// the error is caused by a generated token which might refer to its origin.
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({errorToken, tokens} = parser);
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[errorTag, errorText, errorLoc] = errorToken;
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errorText = (function() {
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switch (false) {
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case errorToken !== tokens[tokens.length - 1]:
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return 'end of input';
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case errorTag !== 'INDENT' && errorTag !== 'OUTDENT':
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return 'indentation';
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case errorTag !== 'IDENTIFIER' && errorTag !== 'NUMBER' && errorTag !== 'INFINITY' && errorTag !== 'STRING' && errorTag !== 'STRING_START' && errorTag !== 'REGEX' && errorTag !== 'REGEX_START':
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return errorTag.replace(/_START$/, '').toLowerCase();
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default:
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return helpers.nameWhitespaceCharacter(errorText);
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}
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})();
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// The second argument has a `loc` property, which should have the location
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// data for this token. Unfortunately, Jison seems to send an outdated `loc`
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// (from the previous token), so we take the location information directly
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// from the lexer.
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return helpers.throwSyntaxError(`unexpected ${errorText}`, errorLoc);
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};
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// Based on http://v8.googlecode.com/svn/branches/bleeding_edge/src/messages.js
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// Modified to handle sourceMap
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formatSourcePosition = function(frame, getSourceMapping) {
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var as, column, fileLocation, filename, functionName, isConstructor, isMethodCall, line, methodName, source, tp, typeName;
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filename = void 0;
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fileLocation = '';
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if (frame.isNative()) {
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fileLocation = "native";
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} else {
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if (frame.isEval()) {
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filename = frame.getScriptNameOrSourceURL();
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if (!filename) {
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fileLocation = `${frame.getEvalOrigin()}, `;
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}
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} else {
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filename = frame.getFileName();
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}
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filename || (filename = "<anonymous>");
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line = frame.getLineNumber();
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column = frame.getColumnNumber();
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// Check for a sourceMap position
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source = getSourceMapping(filename, line, column);
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fileLocation = source ? `${filename}:${source[0]}:${source[1]}` : `${filename}:${line}:${column}`;
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}
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functionName = frame.getFunctionName();
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isConstructor = frame.isConstructor();
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isMethodCall = !(frame.isToplevel() || isConstructor);
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if (isMethodCall) {
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methodName = frame.getMethodName();
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typeName = frame.getTypeName();
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if (functionName) {
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tp = as = '';
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if (typeName && functionName.indexOf(typeName)) {
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tp = `${typeName}.`;
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}
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if (methodName && functionName.indexOf(`.${methodName}`) !== functionName.length - methodName.length - 1) {
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as = ` [as ${methodName}]`;
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}
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return `${tp}${functionName}${as} (${fileLocation})`;
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} else {
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return `${typeName}.${methodName || '<anonymous>'} (${fileLocation})`;
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}
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} else if (isConstructor) {
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return `new ${functionName || '<anonymous>'} (${fileLocation})`;
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} else if (functionName) {
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return `${functionName} (${fileLocation})`;
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} else {
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return fileLocation;
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}
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};
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getSourceMap = function(filename) {
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var answer;
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if (sourceMaps[filename] != null) {
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return sourceMaps[filename];
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// CoffeeScript compiled in a browser may get compiled with `options.filename`
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// of `<anonymous>`, but the browser may request the stack trace with the
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// filename of the script file.
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} else if (sourceMaps['<anonymous>'] != null) {
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return sourceMaps['<anonymous>'];
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} else if (sources[filename] != null) {
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answer = compile(sources[filename], {
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filename: filename,
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sourceMap: true,
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literate: helpers.isLiterate(filename)
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});
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return answer.sourceMap;
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} else {
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return null;
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}
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};
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// Based on [michaelficarra/CoffeeScriptRedux](http://goo.gl/ZTx1p)
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// NodeJS / V8 have no support for transforming positions in stack traces using
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// sourceMap, so we must monkey-patch Error to display CoffeeScript source
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// positions.
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Error.prepareStackTrace = function(err, stack) {
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var frame, frames, getSourceMapping;
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getSourceMapping = function(filename, line, column) {
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var answer, sourceMap;
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sourceMap = getSourceMap(filename);
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if (sourceMap != null) {
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answer = sourceMap.sourceLocation([line - 1, column - 1]);
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}
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if (answer != null) {
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return [answer[0] + 1, answer[1] + 1];
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} else {
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return null;
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}
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};
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frames = (function() {
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var i, len, results;
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results = [];
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for (i = 0, len = stack.length; i < len; i++) {
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frame = stack[i];
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if (frame.getFunction() === exports.run) {
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break;
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}
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results.push(` at ${formatSourcePosition(frame, getSourceMapping)}`);
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}
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return results;
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})();
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return `${err.toString()}\n${frames.join('\n')}\n`;
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};
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checkShebangLine = function(file, input) {
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var args, firstLine, ref, rest;
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firstLine = input.split(/$/m)[0];
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rest = firstLine != null ? firstLine.match(/^#!\s*([^\s]+\s*)(.*)/) : void 0;
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args = rest != null ? (ref = rest[2]) != null ? ref.split(/\s/).filter(function(s) {
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return s !== '';
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}) : void 0 : void 0;
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if ((args != null ? args.length : void 0) > 1) {
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console.error('The script to be run begins with a shebang line with more than one\nargument. This script will fail on platforms such as Linux which only\nallow a single argument.');
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console.error(`The shebang line was: '${firstLine}' in file '${file}'`);
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return console.error(`The arguments were: ${JSON.stringify(args)}`);
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}
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};
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}).call(this);
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