mirror of
https://github.com/jashkenas/coffeescript.git
synced 2022-11-09 12:23:24 -05:00
305 lines
11 KiB
JavaScript
305 lines
11 KiB
JavaScript
// Generated by CoffeeScript 2.6.1
|
|
(function() {
|
|
var CoffeeScript, addHistory, addMultilineHandler, fs, getCommandId, merge, nodeREPL, path, replDefaults, runInContext, sawSIGINT, transpile, updateSyntaxError, vm;
|
|
|
|
fs = require('fs');
|
|
|
|
path = require('path');
|
|
|
|
vm = require('vm');
|
|
|
|
nodeREPL = require('repl');
|
|
|
|
CoffeeScript = require('./');
|
|
|
|
({merge, updateSyntaxError} = require('./helpers'));
|
|
|
|
sawSIGINT = false;
|
|
|
|
transpile = false;
|
|
|
|
replDefaults = {
|
|
prompt: 'coffee> ',
|
|
historyFile: (function() {
|
|
var historyPath;
|
|
historyPath = process.env.XDG_CACHE_HOME || process.env.HOME;
|
|
if (historyPath) {
|
|
return path.join(historyPath, '.coffee_history');
|
|
}
|
|
})(),
|
|
historyMaxInputSize: 10240,
|
|
eval: function(input, context, filename, cb) {
|
|
var Assign, Block, Call, Code, Literal, Root, Value, ast, err, isAsync, js, ref, ref1, referencedVars, result, token, tokens;
|
|
// XXX: multiline hack.
|
|
input = input.replace(/\uFF00/g, '\n');
|
|
// Node's REPL sends the input ending with a newline and then wrapped in
|
|
// parens. Unwrap all that.
|
|
input = input.replace(/^\(([\s\S]*)\n\)$/m, '$1');
|
|
// Node's REPL v6.9.1+ sends the input wrapped in a try/catch statement.
|
|
// Unwrap that too.
|
|
input = input.replace(/^\s*try\s*{([\s\S]*)}\s*catch.*$/m, '$1');
|
|
// Require AST nodes to do some AST manipulation.
|
|
({Block, Assign, Value, Literal, Call, Code, Root} = require('./nodes'));
|
|
try {
|
|
// Tokenize the clean input.
|
|
tokens = CoffeeScript.tokens(input);
|
|
// Filter out tokens generated just to hold comments.
|
|
if (tokens.length >= 2 && tokens[0].generated && ((ref = tokens[0].comments) != null ? ref.length : void 0) !== 0 && `${tokens[0][1]}` === '' && tokens[1][0] === 'TERMINATOR') {
|
|
tokens = tokens.slice(2);
|
|
}
|
|
if (tokens.length >= 1 && tokens[tokens.length - 1].generated && ((ref1 = tokens[tokens.length - 1].comments) != null ? ref1.length : void 0) !== 0 && `${tokens[tokens.length - 1][1]}` === '') {
|
|
tokens.pop();
|
|
}
|
|
// Collect referenced variable names just like in `CoffeeScript.compile`.
|
|
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;
|
|
})();
|
|
// Generate the AST of the tokens.
|
|
ast = CoffeeScript.nodes(tokens).body;
|
|
// Add assignment to `__` variable to force the input to be an expression.
|
|
ast = new Block([new Assign(new Value(new Literal('__')), ast, '=')]);
|
|
// Wrap the expression in a closure to support top-level `await`.
|
|
ast = new Code([], ast);
|
|
isAsync = ast.isAsync;
|
|
// Invoke the wrapping closure.
|
|
ast = new Root(new Block([new Call(ast)]));
|
|
js = ast.compile({
|
|
bare: true,
|
|
locals: Object.keys(context),
|
|
referencedVars,
|
|
sharedScope: true
|
|
});
|
|
if (transpile) {
|
|
js = transpile.transpile(js, transpile.options).code;
|
|
// Strip `"use strict"`, to avoid an exception on assigning to
|
|
// undeclared variable `__`.
|
|
js = js.replace(/^"use strict"|^'use strict'/, '');
|
|
}
|
|
result = runInContext(js, context, filename);
|
|
// Await an async result, if necessary.
|
|
if (isAsync) {
|
|
result.then(function(resolvedResult) {
|
|
if (!sawSIGINT) {
|
|
return cb(null, resolvedResult);
|
|
}
|
|
});
|
|
return sawSIGINT = false;
|
|
} else {
|
|
return cb(null, result);
|
|
}
|
|
} catch (error) {
|
|
err = error;
|
|
// AST's `compile` does not add source code information to syntax errors.
|
|
updateSyntaxError(err, input);
|
|
return cb(err);
|
|
}
|
|
}
|
|
};
|
|
|
|
runInContext = function(js, context, filename) {
|
|
if (context === global) {
|
|
return vm.runInThisContext(js, filename);
|
|
} else {
|
|
return vm.runInContext(js, context, filename);
|
|
}
|
|
};
|
|
|
|
addMultilineHandler = function(repl) {
|
|
var inputStream, multiline, nodeLineListener, origPrompt, outputStream, ref;
|
|
({inputStream, outputStream} = repl);
|
|
// Node 0.11.12 changed API, prompt is now _prompt.
|
|
origPrompt = (ref = repl._prompt) != null ? ref : repl.prompt;
|
|
multiline = {
|
|
enabled: false,
|
|
initialPrompt: origPrompt.replace(/^[^> ]*/, function(x) {
|
|
return x.replace(/./g, '-');
|
|
}),
|
|
prompt: origPrompt.replace(/^[^> ]*>?/, function(x) {
|
|
return x.replace(/./g, '.');
|
|
}),
|
|
buffer: ''
|
|
};
|
|
// Proxy node's line listener
|
|
nodeLineListener = repl.listeners('line')[0];
|
|
repl.removeListener('line', nodeLineListener);
|
|
repl.on('line', function(cmd) {
|
|
if (multiline.enabled) {
|
|
multiline.buffer += `${cmd}\n`;
|
|
repl.setPrompt(multiline.prompt);
|
|
repl.prompt(true);
|
|
} else {
|
|
repl.setPrompt(origPrompt);
|
|
nodeLineListener(cmd);
|
|
}
|
|
});
|
|
// Handle Ctrl-v
|
|
return inputStream.on('keypress', function(char, key) {
|
|
if (!(key && key.ctrl && !key.meta && !key.shift && key.name === 'v')) {
|
|
return;
|
|
}
|
|
if (multiline.enabled) {
|
|
// allow arbitrarily switching between modes any time before multiple lines are entered
|
|
if (!multiline.buffer.match(/\n/)) {
|
|
multiline.enabled = !multiline.enabled;
|
|
repl.setPrompt(origPrompt);
|
|
repl.prompt(true);
|
|
return;
|
|
}
|
|
// no-op unless the current line is empty
|
|
if ((repl.line != null) && !repl.line.match(/^\s*$/)) {
|
|
return;
|
|
}
|
|
// eval, print, loop
|
|
multiline.enabled = !multiline.enabled;
|
|
repl.line = '';
|
|
repl.cursor = 0;
|
|
repl.output.cursorTo(0);
|
|
repl.output.clearLine(1);
|
|
// XXX: multiline hack
|
|
multiline.buffer = multiline.buffer.replace(/\n/g, '\uFF00');
|
|
repl.emit('line', multiline.buffer);
|
|
multiline.buffer = '';
|
|
} else {
|
|
multiline.enabled = !multiline.enabled;
|
|
repl.setPrompt(multiline.initialPrompt);
|
|
repl.prompt(true);
|
|
}
|
|
});
|
|
};
|
|
|
|
// Store and load command history from a file
|
|
addHistory = function(repl, filename, maxSize) {
|
|
var buffer, fd, lastLine, readFd, size, stat;
|
|
lastLine = null;
|
|
try {
|
|
// Get file info and at most maxSize of command history
|
|
stat = fs.statSync(filename);
|
|
size = Math.min(maxSize, stat.size);
|
|
// Read last `size` bytes from the file
|
|
readFd = fs.openSync(filename, 'r');
|
|
buffer = Buffer.alloc(size);
|
|
fs.readSync(readFd, buffer, 0, size, stat.size - size);
|
|
fs.closeSync(readFd);
|
|
// Set the history on the interpreter
|
|
repl.history = buffer.toString().split('\n').reverse();
|
|
if (stat.size > maxSize) {
|
|
// If the history file was truncated we should pop off a potential partial line
|
|
repl.history.pop();
|
|
}
|
|
if (repl.history[0] === '') {
|
|
// Shift off the final blank newline
|
|
repl.history.shift();
|
|
}
|
|
repl.historyIndex = -1;
|
|
lastLine = repl.history[0];
|
|
} catch (error) {}
|
|
fd = fs.openSync(filename, 'a');
|
|
repl.addListener('line', function(code) {
|
|
if (code && code.length && code !== '.history' && code !== '.exit' && lastLine !== code) {
|
|
// Save the latest command in the file
|
|
fs.writeSync(fd, `${code}\n`);
|
|
return lastLine = code;
|
|
}
|
|
});
|
|
// XXX: The SIGINT event from REPLServer is undocumented, so this is a bit fragile
|
|
repl.on('SIGINT', function() {
|
|
return sawSIGINT = true;
|
|
});
|
|
repl.on('exit', function() {
|
|
return fs.closeSync(fd);
|
|
});
|
|
// Add a command to show the history stack
|
|
return repl.commands[getCommandId(repl, 'history')] = {
|
|
help: 'Show command history',
|
|
action: function() {
|
|
repl.outputStream.write(`${repl.history.slice(0).reverse().join('\n')}\n`);
|
|
return repl.displayPrompt();
|
|
}
|
|
};
|
|
};
|
|
|
|
getCommandId = function(repl, commandName) {
|
|
var commandsHaveLeadingDot;
|
|
// Node 0.11 changed API, a command such as '.help' is now stored as 'help'
|
|
commandsHaveLeadingDot = repl.commands['.help'] != null;
|
|
if (commandsHaveLeadingDot) {
|
|
return `.${commandName}`;
|
|
} else {
|
|
return commandName;
|
|
}
|
|
};
|
|
|
|
module.exports = {
|
|
start: function(opts = {}) {
|
|
var Module, build, major, minor, originalModuleLoad, repl;
|
|
[major, minor, build] = process.versions.node.split('.').map(function(n) {
|
|
return parseInt(n, 10);
|
|
});
|
|
if (major < 6) {
|
|
console.warn("Node 6+ required for CoffeeScript REPL");
|
|
process.exit(1);
|
|
}
|
|
CoffeeScript.register();
|
|
process.argv = ['coffee'].concat(process.argv.slice(2));
|
|
if (opts.transpile) {
|
|
transpile = {};
|
|
try {
|
|
transpile.transpile = require('@babel/core').transform;
|
|
} catch (error) {
|
|
try {
|
|
transpile.transpile = require('babel-core').transform;
|
|
} catch (error) {
|
|
console.error(`To use --transpile with an interactive REPL, @babel/core must be installed either in the current folder or globally:
|
|
npm install --save-dev @babel/core
|
|
or
|
|
npm install --global @babel/core
|
|
And you must save options to configure Babel in one of the places it looks to find its options.
|
|
See https://coffeescript.org/#transpilation`);
|
|
process.exit(1);
|
|
}
|
|
}
|
|
transpile.options = {
|
|
filename: path.resolve(process.cwd(), '<repl>')
|
|
};
|
|
// Since the REPL compilation path is unique (in `eval` above), we need
|
|
// another way to get the `options` object attached to a module so that
|
|
// it knows later on whether it needs to be transpiled. In the case of
|
|
// the REPL, the only applicable option is `transpile`.
|
|
Module = require('module');
|
|
originalModuleLoad = Module.prototype.load;
|
|
Module.prototype.load = function(filename) {
|
|
this.options = {
|
|
transpile: transpile.options
|
|
};
|
|
return originalModuleLoad.call(this, filename);
|
|
};
|
|
}
|
|
opts = merge(replDefaults, opts);
|
|
repl = nodeREPL.start(opts);
|
|
if (opts.prelude) {
|
|
runInContext(opts.prelude, repl.context, 'prelude');
|
|
}
|
|
repl.on('exit', function() {
|
|
if (!repl.closed) {
|
|
return repl.outputStream.write('\n');
|
|
}
|
|
});
|
|
addMultilineHandler(repl);
|
|
if (opts.historyFile) {
|
|
addHistory(repl, opts.historyFile, opts.historyMaxInputSize);
|
|
}
|
|
// Adapt help inherited from the node REPL
|
|
repl.commands[getCommandId(repl, 'load')].help = 'Load code from a file into this REPL session';
|
|
return repl;
|
|
}
|
|
};
|
|
|
|
}).call(this);
|