mirror of
https://github.com/jashkenas/coffeescript.git
synced 2022-11-09 12:23:24 -05:00
438 lines
18 KiB
JavaScript
438 lines
18 KiB
JavaScript
// Generated by CoffeeScript 2.1.1
|
||
(function() {
|
||
// CoffeeScript can be used both on the server, as a command-line compiler based
|
||
// on Node.js/V8, or to run CoffeeScript directly in the browser. This module
|
||
// contains the main entry functions for tokenizing, parsing, and compiling
|
||
// source CoffeeScript into JavaScript.
|
||
var FILE_EXTENSIONS, Lexer, SourceMap, base64encode, checkShebangLine, compile, formatSourcePosition, getSourceMap, helpers, lexer, packageJson, parser, sourceMaps, sources, withPrettyErrors,
|
||
indexOf = [].indexOf;
|
||
|
||
({Lexer} = require('./lexer'));
|
||
|
||
({parser} = require('./parser'));
|
||
|
||
helpers = require('./helpers');
|
||
|
||
SourceMap = require('./sourcemap');
|
||
|
||
// Require `package.json`, which is two levels above this file, as this file is
|
||
// evaluated from `lib/coffeescript`.
|
||
packageJson = require('../../package.json');
|
||
|
||
// The current CoffeeScript version number.
|
||
exports.VERSION = packageJson.version;
|
||
|
||
exports.FILE_EXTENSIONS = FILE_EXTENSIONS = ['.coffee', '.litcoffee', '.coffee.md'];
|
||
|
||
// Expose helpers for testing.
|
||
exports.helpers = helpers;
|
||
|
||
// Function that allows for btoa in both nodejs and the browser.
|
||
base64encode = function(src) {
|
||
switch (false) {
|
||
case typeof Buffer !== 'function':
|
||
return Buffer.from(src).toString('base64');
|
||
case typeof btoa !== 'function':
|
||
// The contents of a `<script>` block are encoded via UTF-16, so if any extended
|
||
// characters are used in the block, btoa will fail as it maxes out at UTF-8.
|
||
// See https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#The_Unicode_Problem
|
||
// for the gory details, and for the solution implemented here.
|
||
return btoa(encodeURIComponent(src).replace(/%([0-9A-F]{2})/g, function(match, p1) {
|
||
return String.fromCharCode('0x' + p1);
|
||
}));
|
||
default:
|
||
throw new Error('Unable to base64 encode inline sourcemap.');
|
||
}
|
||
};
|
||
|
||
// Function wrapper to add source file information to SyntaxErrors thrown by the
|
||
// lexer/parser/compiler.
|
||
withPrettyErrors = function(fn) {
|
||
return function(code, options = {}) {
|
||
var err;
|
||
try {
|
||
return fn.call(this, code, options);
|
||
} catch (error) {
|
||
err = error;
|
||
if (typeof code !== 'string') { // Support `CoffeeScript.nodes(tokens)`.
|
||
throw err;
|
||
}
|
||
throw helpers.updateSyntaxError(err, code, options.filename);
|
||
}
|
||
};
|
||
};
|
||
|
||
// For each compiled file, save its source in memory in case we need to
|
||
// recompile it later. We might need to recompile if the first compilation
|
||
// didn’t create a source map (faster) but something went wrong and we need
|
||
// a stack trace. Assuming that most of the time, code isn’t throwing
|
||
// exceptions, it’s probably more efficient to compile twice only when we
|
||
// need a stack trace, rather than always generating a source map even when
|
||
// it’s not likely to be used. Save in form of `filename`: [`(source)`]
|
||
sources = {};
|
||
|
||
// Also save source maps if generated, in form of `(source)`: [`(source map)`].
|
||
sourceMaps = {};
|
||
|
||
// Compile CoffeeScript code to JavaScript, using the Coffee/Jison compiler.
|
||
|
||
// If `options.sourceMap` is specified, then `options.filename` must also be
|
||
// specified. All options that can be passed to `SourceMap#generate` may also
|
||
// be passed here.
|
||
|
||
// This returns a javascript string, unless `options.sourceMap` is passed,
|
||
// in which case this returns a `{js, v3SourceMap, sourceMap}`
|
||
// object, where sourceMap is a sourcemap.coffee#SourceMap object, handy for
|
||
// doing programmatic lookups.
|
||
exports.compile = compile = withPrettyErrors(function(code, options = {}) {
|
||
var currentColumn, currentLine, encoded, filename, fragment, fragments, generateSourceMap, header, i, j, js, len, len1, map, newLines, ref, ref1, sourceMapDataURI, sourceURL, token, tokens, transpiler, transpilerOptions, transpilerOutput, v3SourceMap;
|
||
// Clone `options`, to avoid mutating the `options` object passed in.
|
||
options = Object.assign({}, options);
|
||
// Always generate a source map if no filename is passed in, since without a
|
||
// a filename we have no way to retrieve this source later in the event that
|
||
// we need to recompile it to get a source map for `prepareStackTrace`.
|
||
generateSourceMap = options.sourceMap || options.inlineMap || (options.filename == null);
|
||
filename = options.filename || '<anonymous>';
|
||
checkShebangLine(filename, code);
|
||
if (sources[filename] == null) {
|
||
sources[filename] = [];
|
||
}
|
||
sources[filename].push(code);
|
||
if (generateSourceMap) {
|
||
map = new SourceMap;
|
||
}
|
||
tokens = lexer.tokenize(code, options);
|
||
// Pass a list of referenced variables, so that generated variables won’t get
|
||
// the same name.
|
||
options.referencedVars = (function() {
|
||
var i, len, results;
|
||
results = [];
|
||
for (i = 0, len = tokens.length; i < len; i++) {
|
||
token = tokens[i];
|
||
if (token[0] === 'IDENTIFIER') {
|
||
results.push(token[1]);
|
||
}
|
||
}
|
||
return results;
|
||
})();
|
||
// Check for import or export; if found, force bare mode.
|
||
if (!((options.bare != null) && options.bare === true)) {
|
||
for (i = 0, len = tokens.length; i < len; i++) {
|
||
token = tokens[i];
|
||
if ((ref = token[0]) === 'IMPORT' || ref === 'EXPORT') {
|
||
options.bare = true;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
fragments = parser.parse(tokens).compileToFragments(options);
|
||
currentLine = 0;
|
||
if (options.header) {
|
||
currentLine += 1;
|
||
}
|
||
if (options.shiftLine) {
|
||
currentLine += 1;
|
||
}
|
||
currentColumn = 0;
|
||
js = "";
|
||
for (j = 0, len1 = fragments.length; j < len1; j++) {
|
||
fragment = fragments[j];
|
||
// Update the sourcemap with data from each fragment.
|
||
if (generateSourceMap) {
|
||
// Do not include empty, whitespace, or semicolon-only fragments.
|
||
if (fragment.locationData && !/^[;\s]*$/.test(fragment.code)) {
|
||
map.add([fragment.locationData.first_line, fragment.locationData.first_column], [currentLine, currentColumn], {
|
||
noReplace: true
|
||
});
|
||
}
|
||
newLines = helpers.count(fragment.code, "\n");
|
||
currentLine += newLines;
|
||
if (newLines) {
|
||
currentColumn = fragment.code.length - (fragment.code.lastIndexOf("\n") + 1);
|
||
} else {
|
||
currentColumn += fragment.code.length;
|
||
}
|
||
}
|
||
// Copy the code from each fragment into the final JavaScript.
|
||
js += fragment.code;
|
||
}
|
||
if (options.header) {
|
||
header = `Generated by CoffeeScript ${this.VERSION}`;
|
||
js = `// ${header}\n${js}`;
|
||
}
|
||
if (generateSourceMap) {
|
||
v3SourceMap = map.generate(options, code);
|
||
if (sourceMaps[filename] == null) {
|
||
sourceMaps[filename] = [];
|
||
}
|
||
sourceMaps[filename].push(map);
|
||
}
|
||
if (options.transpile) {
|
||
if (typeof options.transpile !== 'object') {
|
||
// This only happens if run via the Node API and `transpile` is set to
|
||
// something other than an object.
|
||
throw new Error('The transpile option must be given an object with options to pass to Babel');
|
||
}
|
||
// Get the reference to Babel that we have been passed if this compiler
|
||
// is run via the CLI or Node API.
|
||
transpiler = options.transpile.transpile;
|
||
delete options.transpile.transpile;
|
||
transpilerOptions = Object.assign({}, options.transpile);
|
||
// See https://github.com/babel/babel/issues/827#issuecomment-77573107:
|
||
// Babel can take a v3 source map object as input in `inputSourceMap`
|
||
// and it will return an *updated* v3 source map object in its output.
|
||
if (v3SourceMap && (transpilerOptions.inputSourceMap == null)) {
|
||
transpilerOptions.inputSourceMap = v3SourceMap;
|
||
}
|
||
transpilerOutput = transpiler(js, transpilerOptions);
|
||
js = transpilerOutput.code;
|
||
if (v3SourceMap && transpilerOutput.map) {
|
||
v3SourceMap = transpilerOutput.map;
|
||
}
|
||
}
|
||
if (options.inlineMap) {
|
||
encoded = base64encode(JSON.stringify(v3SourceMap));
|
||
sourceMapDataURI = `//# sourceMappingURL=data:application/json;base64,${encoded}`;
|
||
sourceURL = `//# sourceURL=${(ref1 = options.filename) != null ? ref1 : 'coffeescript'}`;
|
||
js = `${js}\n${sourceMapDataURI}\n${sourceURL}`;
|
||
}
|
||
if (options.sourceMap) {
|
||
return {
|
||
js,
|
||
sourceMap: map,
|
||
v3SourceMap: JSON.stringify(v3SourceMap, null, 2)
|
||
};
|
||
} else {
|
||
return js;
|
||
}
|
||
});
|
||
|
||
// Tokenize a string of CoffeeScript code, and return the array of tokens.
|
||
exports.tokens = withPrettyErrors(function(code, options) {
|
||
return lexer.tokenize(code, options);
|
||
});
|
||
|
||
// Parse a string of CoffeeScript code or an array of lexed tokens, and
|
||
// return the AST. You can then compile it by calling `.compile()` on the root,
|
||
// or traverse it by using `.traverseChildren()` with a callback.
|
||
exports.nodes = withPrettyErrors(function(source, options) {
|
||
if (typeof source === 'string') {
|
||
return parser.parse(lexer.tokenize(source, options));
|
||
} else {
|
||
return parser.parse(source);
|
||
}
|
||
});
|
||
|
||
// This file used to export these methods; leave stubs that throw warnings
|
||
// instead. These methods have been moved into `index.coffee` to provide
|
||
// separate entrypoints for Node and non-Node environments, so that static
|
||
// analysis tools don’t choke on Node packages when compiling for a non-Node
|
||
// environment.
|
||
exports.run = exports.eval = exports.register = function() {
|
||
throw new Error('require index.coffee, not this file');
|
||
};
|
||
|
||
// Instantiate a Lexer for our use here.
|
||
lexer = new Lexer;
|
||
|
||
// The real Lexer produces a generic stream of tokens. This object provides a
|
||
// thin wrapper around it, compatible with the Jison API. We can then pass it
|
||
// directly as a "Jison lexer".
|
||
parser.lexer = {
|
||
lex: function() {
|
||
var tag, token;
|
||
token = parser.tokens[this.pos++];
|
||
if (token) {
|
||
[tag, this.yytext, this.yylloc] = token;
|
||
parser.errorToken = token.origin || token;
|
||
this.yylineno = this.yylloc.first_line;
|
||
} else {
|
||
tag = '';
|
||
}
|
||
return tag;
|
||
},
|
||
setInput: function(tokens) {
|
||
parser.tokens = tokens;
|
||
return this.pos = 0;
|
||
},
|
||
upcomingInput: function() {
|
||
return '';
|
||
}
|
||
};
|
||
|
||
// Make all the AST nodes visible to the parser.
|
||
parser.yy = require('./nodes');
|
||
|
||
// Override Jison's default error handling function.
|
||
parser.yy.parseError = function(message, {token}) {
|
||
var errorLoc, errorTag, errorText, errorToken, tokens;
|
||
// Disregard Jison's message, it contains redundant line number information.
|
||
// Disregard the token, we take its value directly from the lexer in case
|
||
// the error is caused by a generated token which might refer to its origin.
|
||
({errorToken, tokens} = parser);
|
||
[errorTag, errorText, errorLoc] = errorToken;
|
||
errorText = (function() {
|
||
switch (false) {
|
||
case errorToken !== tokens[tokens.length - 1]:
|
||
return 'end of input';
|
||
case errorTag !== 'INDENT' && errorTag !== 'OUTDENT':
|
||
return 'indentation';
|
||
case errorTag !== 'IDENTIFIER' && errorTag !== 'NUMBER' && errorTag !== 'INFINITY' && errorTag !== 'STRING' && errorTag !== 'STRING_START' && errorTag !== 'REGEX' && errorTag !== 'REGEX_START':
|
||
return errorTag.replace(/_START$/, '').toLowerCase();
|
||
default:
|
||
return helpers.nameWhitespaceCharacter(errorText);
|
||
}
|
||
})();
|
||
// The second argument has a `loc` property, which should have the location
|
||
// data for this token. Unfortunately, Jison seems to send an outdated `loc`
|
||
// (from the previous token), so we take the location information directly
|
||
// from the lexer.
|
||
return helpers.throwSyntaxError(`unexpected ${errorText}`, errorLoc);
|
||
};
|
||
|
||
// Based on http://v8.googlecode.com/svn/branches/bleeding_edge/src/messages.js
|
||
// Modified to handle sourceMap
|
||
formatSourcePosition = function(frame, getSourceMapping) {
|
||
var as, column, fileLocation, filename, functionName, isConstructor, isMethodCall, line, methodName, source, tp, typeName;
|
||
filename = void 0;
|
||
fileLocation = '';
|
||
if (frame.isNative()) {
|
||
fileLocation = "native";
|
||
} else {
|
||
if (frame.isEval()) {
|
||
filename = frame.getScriptNameOrSourceURL();
|
||
if (!filename) {
|
||
fileLocation = `${frame.getEvalOrigin()}, `;
|
||
}
|
||
} else {
|
||
filename = frame.getFileName();
|
||
}
|
||
filename || (filename = "<anonymous>");
|
||
line = frame.getLineNumber();
|
||
column = frame.getColumnNumber();
|
||
// Check for a sourceMap position
|
||
source = getSourceMapping(filename, line, column);
|
||
fileLocation = source ? `${filename}:${source[0]}:${source[1]}` : `${filename}:${line}:${column}`;
|
||
}
|
||
functionName = frame.getFunctionName();
|
||
isConstructor = frame.isConstructor();
|
||
isMethodCall = !(frame.isToplevel() || isConstructor);
|
||
if (isMethodCall) {
|
||
methodName = frame.getMethodName();
|
||
typeName = frame.getTypeName();
|
||
if (functionName) {
|
||
tp = as = '';
|
||
if (typeName && functionName.indexOf(typeName)) {
|
||
tp = `${typeName}.`;
|
||
}
|
||
if (methodName && functionName.indexOf(`.${methodName}`) !== functionName.length - methodName.length - 1) {
|
||
as = ` [as ${methodName}]`;
|
||
}
|
||
return `${tp}${functionName}${as} (${fileLocation})`;
|
||
} else {
|
||
return `${typeName}.${methodName || '<anonymous>'} (${fileLocation})`;
|
||
}
|
||
} else if (isConstructor) {
|
||
return `new ${functionName || '<anonymous>'} (${fileLocation})`;
|
||
} else if (functionName) {
|
||
return `${functionName} (${fileLocation})`;
|
||
} else {
|
||
return fileLocation;
|
||
}
|
||
};
|
||
|
||
getSourceMap = function(filename, line, column) {
|
||
var answer, i, map, ref, ref1, sourceLocation;
|
||
if (!(filename === '<anonymous>' || (ref = filename.slice(filename.lastIndexOf('.')), indexOf.call(FILE_EXTENSIONS, ref) >= 0))) {
|
||
// Skip files that we didn’t compile, like Node system files that appear in
|
||
// the stack trace, as they never have source maps.
|
||
return null;
|
||
}
|
||
if (filename !== '<anonymous>' && (sourceMaps[filename] != null)) {
|
||
return sourceMaps[filename][sourceMaps[filename].length - 1];
|
||
// CoffeeScript compiled in a browser or via `CoffeeScript.compile` or `.run`
|
||
// may get compiled with `options.filename` that’s missing, which becomes
|
||
// `<anonymous>`; but the runtime might request the stack trace with the
|
||
// filename of the script file. See if we have a source map cached under
|
||
// `<anonymous>` that matches the error.
|
||
} else if (sourceMaps['<anonymous>'] != null) {
|
||
ref1 = sourceMaps['<anonymous>'];
|
||
// Work backwards from the most recent anonymous source maps, until we find
|
||
// one that works. This isn’t foolproof; there is a chance that multiple
|
||
// source maps will have line/column pairs that match. But we have no other
|
||
// way to match them. `frame.getFunction().toString()` doesn’t always work,
|
||
// and it’s not foolproof either.
|
||
for (i = ref1.length - 1; i >= 0; i += -1) {
|
||
map = ref1[i];
|
||
sourceLocation = map.sourceLocation([line - 1, column - 1]);
|
||
if (((sourceLocation != null ? sourceLocation[0] : void 0) != null) && (sourceLocation[1] != null)) {
|
||
return map;
|
||
}
|
||
}
|
||
}
|
||
// If all else fails, recompile this source to get a source map. We need the
|
||
// previous section (for `<anonymous>`) despite this option, because after it
|
||
// gets compiled we will still need to look it up from
|
||
// `sourceMaps['<anonymous>']` in order to find and return it. That’s why we
|
||
// start searching from the end in the previous block, because most of the
|
||
// time the source map we want is the last one.
|
||
if (sources[filename] != null) {
|
||
answer = compile(sources[filename][sources[filename].length - 1], {
|
||
filename: filename,
|
||
sourceMap: true,
|
||
literate: helpers.isLiterate(filename)
|
||
});
|
||
return answer.sourceMap;
|
||
} else {
|
||
return null;
|
||
}
|
||
};
|
||
|
||
// Based on [michaelficarra/CoffeeScriptRedux](http://goo.gl/ZTx1p)
|
||
// NodeJS / V8 have no support for transforming positions in stack traces using
|
||
// sourceMap, so we must monkey-patch Error to display CoffeeScript source
|
||
// positions.
|
||
Error.prepareStackTrace = function(err, stack) {
|
||
var frame, frames, getSourceMapping;
|
||
getSourceMapping = function(filename, line, column) {
|
||
var answer, sourceMap;
|
||
sourceMap = getSourceMap(filename, line, column);
|
||
if (sourceMap != null) {
|
||
answer = sourceMap.sourceLocation([line - 1, column - 1]);
|
||
}
|
||
if (answer != null) {
|
||
return [answer[0] + 1, answer[1] + 1];
|
||
} else {
|
||
return null;
|
||
}
|
||
};
|
||
frames = (function() {
|
||
var i, len, results;
|
||
results = [];
|
||
for (i = 0, len = stack.length; i < len; i++) {
|
||
frame = stack[i];
|
||
if (frame.getFunction() === exports.run) {
|
||
break;
|
||
}
|
||
results.push(` at ${formatSourcePosition(frame, getSourceMapping)}`);
|
||
}
|
||
return results;
|
||
})();
|
||
return `${err.toString()}\n${frames.join('\n')}\n`;
|
||
};
|
||
|
||
checkShebangLine = function(file, input) {
|
||
var args, firstLine, ref, rest;
|
||
firstLine = input.split(/$/m)[0];
|
||
rest = firstLine != null ? firstLine.match(/^#!\s*([^\s]+\s*)(.*)/) : void 0;
|
||
args = rest != null ? (ref = rest[2]) != null ? ref.split(/\s/).filter(function(s) {
|
||
return s !== '';
|
||
}) : void 0 : void 0;
|
||
if ((args != null ? args.length : void 0) > 1) {
|
||
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.');
|
||
console.error(`The shebang line was: '${firstLine}' in file '${file}'`);
|
||
return console.error(`The arguments were: ${JSON.stringify(args)}`);
|
||
}
|
||
};
|
||
|
||
}).call(this);
|