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672 lines
20 KiB
672 lines
20 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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/* A repl library that you can include in your own code to get a runtime
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* interface to your program.
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*
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* var repl = require("/repl.js");
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* // start repl on stdin
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* repl.start("prompt> ");
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*
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* // listen for unix socket connections and start repl on them
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* net.createServer(function (socket) {
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* repl.start("node via Unix socket> ", socket);
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* }).listen("/tmp/node-repl-sock");
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*
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* // listen for TCP socket connections and start repl on them
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* net.createServer(function (socket) {
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* repl.start("node via TCP socket> ", socket);
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* }).listen(5001);
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*
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* // expose foo to repl context
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* repl.start("node > ").context.foo = "stdin is fun";
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*/
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var util = require('util');
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var vm = require('vm');
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var path = require('path');
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var fs = require('fs');
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var rl = require('readline');
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// If obj.hasOwnProperty has been overridden, then calling
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// obj.hasOwnProperty(prop) will break.
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// See: https://github.com/joyent/node/issues/1707
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function hasOwnProperty(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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}
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var context;
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exports.disableColors = process.env.NODE_DISABLE_COLORS ? true : false;
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// hack for require.resolve("./relative") to work properly.
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module.filename = process.cwd() + '/repl';
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// hack for repl require to work properly with node_modules folders
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module.paths = require('module')._nodeModulePaths(module.filename);
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// Can overridden with custom print functions, such as `probe` or `eyes.js`
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exports.writer = util.inspect;
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function REPLServer(prompt, stream, eval, useGlobal) {
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var self = this;
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self.useGlobal = useGlobal;
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self.eval = eval || function(code, context, file, cb) {
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var err, result;
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try {
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if (useGlobal) {
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result = vm.runInThisContext(code, file);
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} else {
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result = vm.runInContext(code, context, file);
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}
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} catch (e) {
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err = e;
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}
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cb(err, result);
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};
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self.resetContext();
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self.bufferedCommand = '';
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if (stream) {
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// We're given a duplex socket
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if (stream.stdin || stream.stdout) {
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self.outputStream = stream.stdout;
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self.inputStream = stream.stdin;
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} else {
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self.outputStream = stream;
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self.inputStream = stream;
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}
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} else {
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self.outputStream = process.stdout;
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self.inputStream = process.stdin;
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process.stdin.resume();
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}
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self.prompt = (prompt != undefined ? prompt : '> ');
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function complete(text, callback) {
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self.complete(text, callback);
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}
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var rli = rl.createInterface(self.inputStream, self.outputStream, complete);
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self.rli = rli;
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this.commands = {};
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defineDefaultCommands(this);
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if (rli.enabled && !exports.disableColors &&
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exports.writer === util.inspect) {
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// Turn on ANSI coloring.
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exports.writer = function(obj, showHidden, depth) {
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return util.inspect(obj, showHidden, depth, true);
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};
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}
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rli.setPrompt(self.prompt);
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var sawSIGINT = false;
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rli.on('SIGINT', function() {
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if (sawSIGINT) {
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rli.close();
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process.exit();
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}
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rli.line = '';
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if (!(self.bufferedCommand && self.bufferedCommand.length > 0) &&
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rli.line.length === 0) {
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rli.output.write('\n(^C again to quit)\n');
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sawSIGINT = true;
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} else {
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rli.output.write('\n');
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}
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self.bufferedCommand = '';
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self.displayPrompt();
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});
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rli.addListener('line', function(cmd) {
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sawSIGINT = false;
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var skipCatchall = false;
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cmd = trimWhitespace(cmd);
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// Check to see if a REPL keyword was used. If it returns true,
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// display next prompt and return.
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if (cmd && cmd.charAt(0) === '.') {
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var matches = cmd.match(/^(\.[^\s]+)\s*(.*)$/);
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var keyword = matches && matches[1];
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var rest = matches && matches[2];
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if (self.parseREPLKeyword(keyword, rest) === true) {
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return;
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} else {
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self.outputStream.write('Invalid REPL keyword\n');
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skipCatchall = true;
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}
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}
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if (!skipCatchall) {
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var evalCmd = self.bufferedCommand + cmd + '\n';
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// This try is for determining if the command is complete, or should
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// continue onto the next line.
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// We try to evaluate both expressions e.g.
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// '{ a : 1 }'
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// and statements e.g.
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// 'for (var i = 0; i < 10; i++) console.log(i);'
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// First we attempt to eval as expression with parens.
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// This catches '{a : 1}' properly.
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self.eval('(' + evalCmd + ')',
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self.context,
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'repl',
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function(e, ret) {
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if (e && !isSyntaxError(e)) return finish(e);
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if (typeof ret === 'function' || e) {
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// Now as statement without parens.
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self.eval(evalCmd, self.context, 'repl', finish);
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} else {
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finish(null, ret);
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}
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});
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} else {
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finish(null);
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}
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function isSyntaxError(e) {
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// Convert error to string
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e = e && (e.stack || e.toString());
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return e && e.match(/^SyntaxError/) &&
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!(e.match(/^SyntaxError: Unexpected token .*\n/) &&
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e.match(/\n at Object.parse \(native\)\n/));
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}
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function finish(e, ret) {
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// If error was SyntaxError and not JSON.parse error
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if (isSyntaxError(e)) {
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// Start buffering data like that:
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// {
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// ... x: 1
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// ... }
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self.bufferedCommand += cmd + '\n';
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self.displayPrompt();
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return;
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} else if (e) {
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self.outputStream.write((e.stack || e) + '\n');
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}
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// Clear buffer if no SyntaxErrors
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self.bufferedCommand = '';
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// If we got any output - print it (if no error)
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if (!e && ret !== undefined) {
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self.context._ = ret;
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self.outputStream.write(exports.writer(ret) + '\n');
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}
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// Display prompt again
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self.displayPrompt();
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};
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});
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rli.addListener('close', function() {
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self.inputStream.destroy();
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});
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self.displayPrompt();
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}
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exports.REPLServer = REPLServer;
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// prompt is a string to print on each line for the prompt,
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// source is a stream to use for I/O, defaulting to stdin/stdout.
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exports.start = function(prompt, source, eval, useGlobal) {
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var repl = new REPLServer(prompt, source, eval, useGlobal);
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if (!exports.repl) exports.repl = repl;
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return repl;
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};
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REPLServer.prototype.createContext = function() {
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if (!this.useGlobal) {
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var context = vm.createContext();
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for (var i in global) context[i] = global[i];
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} else {
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var context = global;
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}
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context.module = module;
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context.require = require;
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context.global = context;
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context.global.global = context;
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return context;
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};
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REPLServer.prototype.resetContext = function(force) {
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if (!context || force) {
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context = this.createContext();
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for (var i in require.cache) delete require.cache[i];
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}
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this.context = context;
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};
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REPLServer.prototype.displayPrompt = function() {
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this.rli.setPrompt(this.bufferedCommand.length ? '... ' : this.prompt);
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this.rli.prompt();
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};
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// read a line from the stream, then eval it
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REPLServer.prototype.readline = function(cmd) {
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};
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var requireRE = /\brequire\s*\(['"](([\w\.\/-]+\/)?([\w\.\/-]*))/;
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var simpleExpressionRE =
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/(([a-zA-Z_$](?:\w|\$)*)\.)*([a-zA-Z_$](?:\w|\$)*)\.?$/;
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// Provide a list of completions for the given leading text. This is
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// given to the readline interface for handling tab completion.
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//
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// Example:
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// complete('var foo = util.')
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// -> [['util.print', 'util.debug', 'util.log', 'util.inspect', 'util.pump'],
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// 'util.' ]
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//
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// Warning: This eval's code like "foo.bar.baz", so it will run property
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// getter code.
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REPLServer.prototype.complete = function(line, callback) {
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var completions;
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// list of completion lists, one for each inheritance "level"
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var completionGroups = [];
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var completeOn, match, filter, i, j, group, c;
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// REPL commands (e.g. ".break").
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var match = null;
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match = line.match(/^\s*(\.\w*)$/);
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if (match) {
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completionGroups.push(Object.keys(this.commands));
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completeOn = match[1];
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if (match[1].length > 1) {
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filter = match[1];
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}
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completionGroupsLoaded();
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} else if (match = line.match(requireRE)) {
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// require('...<Tab>')
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//TODO: suggest require.exts be exposed to be introspec registered
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//extensions?
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//TODO: suggest include the '.' in exts in internal repr: parity with
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//`path.extname`.
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var exts = ['.js', '.node'];
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var indexRe = new RegExp('^index(' + exts.map(regexpEscape).join('|') +
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')$');
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completeOn = match[1];
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var subdir = match[2] || '';
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var filter = match[1];
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var dir, files, f, name, base, ext, abs, subfiles, s;
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group = [];
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var paths = module.paths.concat(require('module').globalPaths);
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for (i = 0; i < paths.length; i++) {
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dir = path.resolve(paths[i], subdir);
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try {
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files = fs.readdirSync(dir);
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} catch (e) {
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continue;
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}
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for (f = 0; f < files.length; f++) {
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name = files[f];
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ext = path.extname(name);
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base = name.slice(0, -ext.length);
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if (base.match(/-\d+\.\d+(\.\d+)?/) || name === '.npm') {
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// Exclude versioned names that 'npm' installs.
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continue;
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}
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if (exts.indexOf(ext) !== -1) {
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if (!subdir || base !== 'index') {
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group.push(subdir + base);
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}
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} else {
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abs = path.resolve(dir, name);
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try {
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if (fs.statSync(abs).isDirectory()) {
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group.push(subdir + name + '/');
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subfiles = fs.readdirSync(abs);
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for (s = 0; s < subfiles.length; s++) {
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if (indexRe.test(subfiles[s])) {
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group.push(subdir + name);
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}
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}
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}
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} catch (e) {}
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}
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}
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}
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if (group.length) {
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completionGroups.push(group);
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}
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if (!subdir) {
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// Kind of lame that this needs to be updated manually.
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// Intentionally excluding moved modules: posix, utils.
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var builtinLibs = ['assert', 'buffer', 'child_process', 'crypto', 'dgram',
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'dns', 'events', 'file', 'freelist', 'fs', 'http', 'net', 'os', 'path',
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'querystring', 'readline', 'repl', 'string_decoder', 'util', 'tcp',
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'url'];
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completionGroups.push(builtinLibs);
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}
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completionGroupsLoaded();
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// Handle variable member lookup.
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// We support simple chained expressions like the following (no function
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// calls, etc.). That is for simplicity and also because we *eval* that
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// leading expression so for safety (see WARNING above) don't want to
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// eval function calls.
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//
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// foo.bar<|> # completions for 'foo' with filter 'bar'
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// spam.eggs.<|> # completions for 'spam.eggs' with filter ''
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// foo<|> # all scope vars with filter 'foo'
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// foo.<|> # completions for 'foo' with filter ''
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} else if (line.length === 0 || line[line.length - 1].match(/\w|\.|\$/)) {
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match = simpleExpressionRE.exec(line);
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if (line.length === 0 || match) {
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var expr;
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completeOn = (match ? match[0] : '');
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if (line.length === 0) {
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filter = '';
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expr = '';
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} else if (line[line.length - 1] === '.') {
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filter = '';
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expr = match[0].slice(0, match[0].length - 1);
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} else {
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var bits = match[0].split('.');
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filter = bits.pop();
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expr = bits.join('.');
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}
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// console.log("expression completion: completeOn='" + completeOn +
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// "' expr='" + expr + "'");
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// Resolve expr and get its completions.
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var obj, memberGroups = [];
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if (!expr) {
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// If context is instance of vm.ScriptContext
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// Get global vars synchronously
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if (this.useGlobal ||
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this.context.constructor &&
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this.context.constructor.name === 'Context') {
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completionGroups.push(Object.getOwnPropertyNames(this.context));
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addStandardGlobals();
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completionGroupsLoaded();
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} else {
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this.eval('.scope', this.context, 'repl', function(err, globals) {
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if (err || !globals) {
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addStandardGlobals();
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} else if (Array.isArray(globals[0])) {
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// Add grouped globals
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globals.forEach(function(group) {
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completionGroups.push(group);
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});
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} else {
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completionGroups.push(globals);
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addStandardGlobals();
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}
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completionGroupsLoaded();
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});
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}
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function addStandardGlobals() {
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// Global object properties
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// (http://www.ecma-international.org/publications/standards/Ecma-262.htm)
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completionGroups.push(['NaN', 'Infinity', 'undefined',
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'eval', 'parseInt', 'parseFloat', 'isNaN', 'isFinite', 'decodeURI',
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'decodeURIComponent', 'encodeURI', 'encodeURIComponent',
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'Object', 'Function', 'Array', 'String', 'Boolean', 'Number',
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'Date', 'RegExp', 'Error', 'EvalError', 'RangeError',
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'ReferenceError', 'SyntaxError', 'TypeError', 'URIError',
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'Math', 'JSON']);
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// Common keywords. Exclude for completion on the empty string, b/c
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// they just get in the way.
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if (filter) {
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completionGroups.push(['break', 'case', 'catch', 'const',
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'continue', 'debugger', 'default', 'delete', 'do', 'else',
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'export', 'false', 'finally', 'for', 'function', 'if',
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'import', 'in', 'instanceof', 'let', 'new', 'null', 'return',
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'switch', 'this', 'throw', 'true', 'try', 'typeof', 'undefined',
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'var', 'void', 'while', 'with', 'yield']);
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}
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}
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} else {
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this.eval(expr, this.context, 'repl', function(e, obj) {
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// if (e) console.log(e);
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if (obj != null) {
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if (typeof obj === 'object' || typeof obj === 'function') {
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memberGroups.push(Object.getOwnPropertyNames(obj));
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}
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// works for non-objects
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try {
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var p = Object.getPrototypeOf(obj);
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var sentinel = 5;
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while (p !== null) {
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memberGroups.push(Object.getOwnPropertyNames(p));
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p = Object.getPrototypeOf(p);
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// Circular refs possible? Let's guard against that.
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sentinel--;
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if (sentinel <= 0) {
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break;
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}
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}
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} catch (e) {
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//console.log("completion error walking prototype chain:" + e);
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}
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}
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if (memberGroups.length) {
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for (i = 0; i < memberGroups.length; i++) {
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completionGroups.push(memberGroups[i].map(function(member) {
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return expr + '.' + member;
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}));
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}
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if (filter) {
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filter = expr + '.' + filter;
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}
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}
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completionGroupsLoaded();
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});
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}
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} else {
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completionGroupsLoaded();
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}
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}
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// Will be called when all completionGroups are in place
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// Useful for async autocompletion
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function completionGroupsLoaded(err) {
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if (err) throw err;
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// Filter, sort (within each group), uniq and merge the completion groups.
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if (completionGroups.length && filter) {
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var newCompletionGroups = [];
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for (i = 0; i < completionGroups.length; i++) {
|
|
group = completionGroups[i].filter(function(elem) {
|
|
return elem.indexOf(filter) == 0;
|
|
});
|
|
if (group.length) {
|
|
newCompletionGroups.push(group);
|
|
}
|
|
}
|
|
completionGroups = newCompletionGroups;
|
|
}
|
|
|
|
if (completionGroups.length) {
|
|
var uniq = {}; // unique completions across all groups
|
|
completions = [];
|
|
// Completion group 0 is the "closest"
|
|
// (least far up the inheritance chain)
|
|
// so we put its completions last: to be closest in the REPL.
|
|
for (i = completionGroups.length - 1; i >= 0; i--) {
|
|
group = completionGroups[i];
|
|
group.sort();
|
|
for (var j = 0; j < group.length; j++) {
|
|
c = group[j];
|
|
if (!hasOwnProperty(c)) {
|
|
completions.push(c);
|
|
uniq[c] = true;
|
|
}
|
|
}
|
|
completions.push(''); // separator btwn groups
|
|
}
|
|
while (completions.length && completions[completions.length - 1] === '') {
|
|
completions.pop();
|
|
}
|
|
}
|
|
|
|
callback(null, [completions || [], completeOn]);
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Used to parse and execute the Node REPL commands.
|
|
*
|
|
* @param {keyword} keyword The command entered to check.
|
|
* @return {Boolean} If true it means don't continue parsing the command.
|
|
*/
|
|
REPLServer.prototype.parseREPLKeyword = function(keyword, rest) {
|
|
var cmd = this.commands[keyword];
|
|
if (cmd) {
|
|
cmd.action.call(this, rest);
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
|
|
REPLServer.prototype.defineCommand = function(keyword, cmd) {
|
|
if (typeof cmd === 'function') {
|
|
cmd = {action: cmd};
|
|
} else if (typeof cmd.action !== 'function') {
|
|
throw new Error('bad argument, action must be a function');
|
|
}
|
|
this.commands['.' + keyword] = cmd;
|
|
};
|
|
|
|
|
|
function defineDefaultCommands(repl) {
|
|
// TODO remove me after 0.3.x
|
|
repl.defineCommand('break', {
|
|
help: 'Sometimes you get stuck, this gets you out',
|
|
action: function() {
|
|
this.bufferedCommand = '';
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('clear', {
|
|
help: 'Break, and also clear the local context',
|
|
action: function() {
|
|
this.outputStream.write('Clearing context...\n');
|
|
this.bufferedCommand = '';
|
|
this.resetContext(true);
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('exit', {
|
|
help: 'Exit the repl',
|
|
action: function() {
|
|
this.rli.close();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('help', {
|
|
help: 'Show repl options',
|
|
action: function() {
|
|
var self = this;
|
|
Object.keys(this.commands).sort().forEach(function(name) {
|
|
var cmd = self.commands[name];
|
|
self.outputStream.write(name + '\t' + (cmd.help || '') + '\n');
|
|
});
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
function trimWhitespace(cmd) {
|
|
var trimmer = /^\s*(.+)\s*$/m,
|
|
matches = trimmer.exec(cmd);
|
|
|
|
if (matches && matches.length === 2) {
|
|
return matches[1];
|
|
}
|
|
}
|
|
|
|
|
|
function regexpEscape(s) {
|
|
return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
|
|
}
|
|
|
|
|
|
/**
|
|
* Converts commands that use var and function <name>() to use the
|
|
* local exports.context when evaled. This provides a local context
|
|
* on the REPL.
|
|
*
|
|
* @param {String} cmd The cmd to convert.
|
|
* @return {String} The converted command.
|
|
*/
|
|
REPLServer.prototype.convertToContext = function(cmd) {
|
|
var self = this, matches,
|
|
scopeVar = /^\s*var\s*([_\w\$]+)(.*)$/m,
|
|
scopeFunc = /^\s*function\s*([_\w\$]+)/;
|
|
|
|
// Replaces: var foo = "bar"; with: self.context.foo = bar;
|
|
matches = scopeVar.exec(cmd);
|
|
if (matches && matches.length === 3) {
|
|
return 'self.context.' + matches[1] + matches[2];
|
|
}
|
|
|
|
// Replaces: function foo() {}; with: foo = function foo() {};
|
|
matches = scopeFunc.exec(self.bufferedCommand);
|
|
if (matches && matches.length === 2) {
|
|
return matches[1] + ' = ' + self.bufferedCommand;
|
|
}
|
|
|
|
return cmd;
|
|
};
|
|
|