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1419 lines
43 KiB
1419 lines
43 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");
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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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'use strict';
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const internalModule = require('internal/module');
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const internalUtil = require('internal/util');
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const { isTypedArray } = require('internal/util/types');
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const util = require('util');
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const utilBinding = process.binding('util');
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const inherits = util.inherits;
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const Stream = require('stream');
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const vm = require('vm');
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const path = require('path');
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const fs = require('fs');
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const Interface = require('readline').Interface;
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const Console = require('console').Console;
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const Module = require('module');
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const domain = require('domain');
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const debug = util.debuglog('repl');
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const errors = require('internal/errors');
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const parentModule = module;
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const replMap = new WeakMap();
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const GLOBAL_OBJECT_PROPERTIES = [
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'NaN', 'Infinity', 'undefined', 'eval', 'parseInt', 'parseFloat', 'isNaN',
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'isFinite', 'decodeURI', 'decodeURIComponent', 'encodeURI',
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'encodeURIComponent', 'Object', 'Function', 'Array', 'String', 'Boolean',
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'Number', 'Date', 'RegExp', 'Error', 'EvalError', 'RangeError',
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'ReferenceError', 'SyntaxError', 'TypeError', 'URIError', 'Math', 'JSON'
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];
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const GLOBAL_OBJECT_PROPERTY_MAP = {};
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for (var n = 0; n < GLOBAL_OBJECT_PROPERTIES.length; n++) {
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GLOBAL_OBJECT_PROPERTY_MAP[GLOBAL_OBJECT_PROPERTIES[n]] =
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GLOBAL_OBJECT_PROPERTIES[n];
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}
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const kBufferedCommandSymbol = Symbol('bufferedCommand');
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try {
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// hack for require.resolve("./relative") to work properly.
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module.filename = path.resolve('repl');
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} catch (e) {
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// path.resolve('repl') fails when the current working directory has been
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// deleted. Fall back to the directory name of the (absolute) executable
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// path. It's not really correct but what are the alternatives?
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const dirname = path.dirname(process.execPath);
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module.filename = path.resolve(dirname, 'repl');
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}
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// hack for repl require to work properly with node_modules folders
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module.paths = Module._nodeModulePaths(module.filename);
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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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// Can overridden with custom print functions, such as `probe` or `eyes.js`.
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// This is the default "writer" value if none is passed in the REPL options.
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exports.writer = util.inspect;
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exports._builtinLibs = internalModule.builtinLibs;
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function REPLServer(prompt,
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stream,
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eval_,
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useGlobal,
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ignoreUndefined,
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replMode) {
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if (!(this instanceof REPLServer)) {
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return new REPLServer(prompt,
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stream,
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eval_,
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useGlobal,
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ignoreUndefined,
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replMode);
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}
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var options, input, output, dom, breakEvalOnSigint;
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if (prompt !== null && typeof prompt === 'object') {
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// an options object was given
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options = prompt;
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stream = options.stream || options.socket;
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input = options.input;
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output = options.output;
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eval_ = options.eval;
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useGlobal = options.useGlobal;
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ignoreUndefined = options.ignoreUndefined;
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prompt = options.prompt;
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dom = options.domain;
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replMode = options.replMode;
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breakEvalOnSigint = options.breakEvalOnSigint;
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} else {
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options = {};
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}
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if (breakEvalOnSigint && eval_) {
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// Allowing this would not reflect user expectations.
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// breakEvalOnSigint affects only the behavior of the default eval().
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throw new errors.Error('ERR_INVALID_REPL_EVAL_CONFIG');
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}
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var self = this;
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self._domain = dom || domain.create();
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self.useGlobal = !!useGlobal;
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self.ignoreUndefined = !!ignoreUndefined;
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self.replMode = replMode || exports.REPL_MODE_SLOPPY;
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self.underscoreAssigned = false;
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self.last = undefined;
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self.breakEvalOnSigint = !!breakEvalOnSigint;
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self.editorMode = false;
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// just for backwards compat, see github.com/joyent/node/pull/7127
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self.rli = this;
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const savedRegExMatches = ['', '', '', '', '', '', '', '', '', ''];
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const sep = '\u0000\u0000\u0000';
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const regExMatcher = new RegExp(`^${sep}(.*)${sep}(.*)${sep}(.*)${sep}(.*)` +
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`${sep}(.*)${sep}(.*)${sep}(.*)${sep}(.*)` +
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`${sep}(.*)$`);
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eval_ = eval_ || defaultEval;
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function defaultEval(code, context, file, cb) {
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var err, result, script, wrappedErr;
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var wrappedCmd = false;
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var input = code;
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if (/^\s*\{/.test(code) && /\}\s*$/.test(code)) {
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// It's confusing for `{ a : 1 }` to be interpreted as a block
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// statement rather than an object literal. So, we first try
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// to wrap it in parentheses, so that it will be interpreted as
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// an expression.
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code = `(${code.trim()})\n`;
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wrappedCmd = true;
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}
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// first, create the Script object to check the syntax
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if (code === '\n')
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return cb(null);
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while (true) {
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try {
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if (!/^\s*$/.test(code) &&
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self.replMode === exports.REPL_MODE_STRICT) {
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// "void 0" keeps the repl from returning "use strict" as the result
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// value for statements and declarations that don't return a value.
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code = `'use strict'; void 0;\n${code}`;
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}
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script = vm.createScript(code, {
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filename: file,
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displayErrors: true
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});
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} catch (e) {
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debug('parse error %j', code, e);
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if (wrappedCmd) {
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wrappedCmd = false;
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// unwrap and try again
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code = input;
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wrappedErr = e;
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continue;
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}
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// preserve original error for wrapped command
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const error = wrappedErr || e;
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if (isRecoverableError(error, code))
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err = new Recoverable(error);
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else
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err = error;
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}
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break;
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}
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// This will set the values from `savedRegExMatches` to corresponding
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// predefined RegExp properties `RegExp.$1`, `RegExp.$2` ... `RegExp.$9`
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regExMatcher.test(savedRegExMatches.join(sep));
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if (!err) {
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// Unset raw mode during evaluation so that Ctrl+C raises a signal.
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let previouslyInRawMode;
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if (self.breakEvalOnSigint) {
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// Start the SIGINT watchdog before entering raw mode so that a very
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// quick Ctrl+C doesn't lead to aborting the process completely.
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utilBinding.startSigintWatchdog();
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previouslyInRawMode = self._setRawMode(false);
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}
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try {
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try {
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const scriptOptions = {
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displayErrors: false,
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breakOnSigint: self.breakEvalOnSigint
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};
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if (self.useGlobal) {
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result = script.runInThisContext(scriptOptions);
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} else {
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result = script.runInContext(context, scriptOptions);
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}
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} finally {
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if (self.breakEvalOnSigint) {
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// Reset terminal mode to its previous value.
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self._setRawMode(previouslyInRawMode);
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// Returns true if there were pending SIGINTs *after* the script
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// has terminated without being interrupted itself.
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if (utilBinding.stopSigintWatchdog()) {
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self.emit('SIGINT');
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}
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}
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}
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} catch (e) {
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err = e;
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if (err.message === 'Script execution interrupted.') {
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// The stack trace for this case is not very useful anyway.
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Object.defineProperty(err, 'stack', { value: '' });
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}
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if (err && process.domain) {
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debug('not recoverable, send to domain');
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process.domain.emit('error', err);
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process.domain.exit();
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return;
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}
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}
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}
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// After executing the current expression, store the values of RegExp
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// predefined properties back in `savedRegExMatches`
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for (var idx = 1; idx < savedRegExMatches.length; idx += 1) {
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savedRegExMatches[idx] = RegExp[`$${idx}`];
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}
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cb(err, result);
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}
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self.eval = self._domain.bind(eval_);
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self._domain.on('error', function debugDomainError(e) {
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debug('domain error');
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const top = replMap.get(self);
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const pstrace = Error.prepareStackTrace;
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Error.prepareStackTrace = prepareStackTrace(pstrace);
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internalUtil.decorateErrorStack(e);
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Error.prepareStackTrace = pstrace;
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const isError = internalUtil.isError(e);
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if (e instanceof SyntaxError && e.stack) {
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// remove repl:line-number and stack trace
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e.stack = e.stack
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.replace(/^repl:\d+\r?\n/, '')
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.replace(/^\s+at\s.*\n?/gm, '');
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} else if (isError && self.replMode === exports.REPL_MODE_STRICT) {
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e.stack = e.stack.replace(/(\s+at\s+repl:)(\d+)/,
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(_, pre, line) => pre + (line - 1));
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}
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if (isError && e.stack) {
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top.outputStream.write(`${e.stack}\n`);
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} else {
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top.outputStream.write(`Thrown: ${String(e)}\n`);
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}
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top.clearBufferedCommand();
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top.lines.level = [];
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top.displayPrompt();
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});
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if (!input && !output) {
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// legacy API, passing a 'stream'/'socket' option
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if (!stream) {
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// use stdin and stdout as the default streams if none were given
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stream = process;
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}
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if (stream.stdin && stream.stdout) {
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// We're given custom object with 2 streams, or the `process` object
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input = stream.stdin;
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output = stream.stdout;
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} else {
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// We're given a duplex readable/writable Stream, like a `net.Socket`
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input = stream;
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output = stream;
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}
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}
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self.inputStream = input;
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self.outputStream = output;
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self.resetContext();
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self.lines.level = [];
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self.clearBufferedCommand();
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Object.defineProperty(this, 'bufferedCommand', {
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get: util.deprecate(() => self[kBufferedCommandSymbol],
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'REPLServer.bufferedCommand is deprecated', 'DEP0074'),
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set: util.deprecate((val) => self[kBufferedCommandSymbol] = val,
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'REPLServer.bufferedCommand is deprecated', 'DEP0074'),
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enumerable: true
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});
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// Figure out which "complete" function to use.
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self.completer = (typeof options.completer === 'function') ?
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options.completer : completer;
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function completer(text, cb) {
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complete.call(self, text, self.editorMode ?
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self.completeOnEditorMode(cb) : cb);
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}
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Interface.call(this, {
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input: self.inputStream,
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output: self.outputStream,
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completer: self.completer,
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terminal: options.terminal,
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historySize: options.historySize,
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prompt
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});
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this.commands = Object.create(null);
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defineDefaultCommands(this);
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// figure out which "writer" function to use
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self.writer = options.writer || exports.writer;
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if (options.useColors === undefined) {
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options.useColors = self.terminal;
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}
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self.useColors = !!options.useColors;
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if (self.useColors && self.writer === util.inspect) {
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// Turn on ANSI coloring.
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self.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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function filterInternalStackFrames(error, structuredStack) {
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// search from the bottom of the call stack to
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// find the first frame with a null function name
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if (typeof structuredStack !== 'object')
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return structuredStack;
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const idx = structuredStack.reverse().findIndex(
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(frame) => frame.getFunctionName() === null);
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// if found, get rid of it and everything below it
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structuredStack = structuredStack.splice(idx + 1);
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return structuredStack;
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}
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function prepareStackTrace(fn) {
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return (error, stackFrames) => {
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const frames = filterInternalStackFrames(error, stackFrames);
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if (fn) {
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return fn(error, frames);
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}
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frames.push(error);
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return frames.reverse().join('\n at ');
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};
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}
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function _parseREPLKeyword(keyword, rest) {
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var cmd = this.commands[keyword];
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if (cmd) {
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cmd.action.call(this, rest);
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return true;
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}
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return false;
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}
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self.parseREPLKeyword = util.deprecate(
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_parseREPLKeyword,
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'REPLServer.parseREPLKeyword() is deprecated',
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'DEP0075');
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self.on('close', function emitExit() {
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self.emit('exit');
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});
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var sawSIGINT = false;
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var sawCtrlD = false;
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self.on('SIGINT', function onSigInt() {
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var empty = self.line.length === 0;
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self.clearLine();
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|
_turnOffEditorMode(self);
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const cmd = self[kBufferedCommandSymbol];
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|
if (!(cmd && cmd.length > 0) && empty) {
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|
if (sawSIGINT) {
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self.close();
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|
sawSIGINT = false;
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return;
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}
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self.output.write('(To exit, press ^C again or type .exit)\n');
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sawSIGINT = true;
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} else {
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sawSIGINT = false;
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}
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self.clearBufferedCommand();
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self.lines.level = [];
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self.displayPrompt();
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|
});
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|
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|
self.on('line', function onLine(cmd) {
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debug('line %j', cmd);
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|
cmd = cmd || '';
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|
sawSIGINT = false;
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|
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|
if (self.editorMode) {
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|
self[kBufferedCommandSymbol] += cmd + '\n';
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|
|
|
// code alignment
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|
const matches = self._sawKeyPress ? cmd.match(/^\s+/) : null;
|
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if (matches) {
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const prefix = matches[0];
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self.write(prefix);
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self.line = prefix;
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self.cursor = prefix.length;
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}
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self.memory(cmd);
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return;
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}
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|
|
|
// Check REPL keywords and empty lines against a trimmed line input.
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|
const trimmedCmd = cmd.trim();
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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.
|
|
if (trimmedCmd) {
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if (trimmedCmd.charAt(0) === '.' && trimmedCmd.charAt(1) !== '.' &&
|
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isNaN(parseFloat(trimmedCmd))) {
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const matches = trimmedCmd.match(/^\.([^\s]+)\s*(.*)$/);
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|
const keyword = matches && matches[1];
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const rest = matches && matches[2];
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if (_parseREPLKeyword.call(self, keyword, rest) === true) {
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|
return;
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|
}
|
|
if (!self[kBufferedCommandSymbol]) {
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|
self.outputStream.write('Invalid REPL keyword\n');
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|
finish(null);
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|
return;
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}
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|
}
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|
}
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const evalCmd = self[kBufferedCommandSymbol] + cmd + '\n';
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debug('eval %j', evalCmd);
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self.eval(evalCmd, self.context, 'repl', finish);
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function finish(e, ret) {
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debug('finish', e, ret);
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self.memory(cmd);
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if (e && !self[kBufferedCommandSymbol] && cmd.trim().startsWith('npm ')) {
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self.outputStream.write('npm should be run outside of the ' +
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'node repl, in your normal shell.\n' +
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'(Press Control-D to exit.)\n');
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|
self.clearBufferedCommand();
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|
self.displayPrompt();
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|
return;
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|
}
|
|
|
|
// If error was SyntaxError and not JSON.parse error
|
|
if (e) {
|
|
if (e instanceof Recoverable && !sawCtrlD) {
|
|
// Start buffering data like that:
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|
// {
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|
// ... x: 1
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// ... }
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|
self[kBufferedCommandSymbol] += cmd + '\n';
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|
self.displayPrompt();
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return;
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} else {
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|
self._domain.emit('error', e.err || e);
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}
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}
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|
|
// Clear buffer if no SyntaxErrors
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|
self.clearBufferedCommand();
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|
sawCtrlD = false;
|
|
|
|
// If we got any output - print it (if no error)
|
|
if (!e &&
|
|
// When an invalid REPL command is used, error message is printed
|
|
// immediately. We don't have to print anything else. So, only when
|
|
// the second argument to this function is there, print it.
|
|
arguments.length === 2 &&
|
|
(!self.ignoreUndefined || ret !== undefined)) {
|
|
if (!self.underscoreAssigned) {
|
|
self.last = ret;
|
|
}
|
|
self.outputStream.write(self.writer(ret) + '\n');
|
|
}
|
|
|
|
// Display prompt again
|
|
self.displayPrompt();
|
|
}
|
|
});
|
|
|
|
self.on('SIGCONT', function onSigCont() {
|
|
if (self.editorMode) {
|
|
self.outputStream.write(`${self._initialPrompt}.editor\n`);
|
|
self.outputStream.write(
|
|
'// Entering editor mode (^D to finish, ^C to cancel)\n');
|
|
self.outputStream.write(`${self[kBufferedCommandSymbol]}\n`);
|
|
self.prompt(true);
|
|
} else {
|
|
self.displayPrompt(true);
|
|
}
|
|
});
|
|
|
|
// Wrap readline tty to enable editor mode
|
|
const ttyWrite = self._ttyWrite.bind(self);
|
|
self._ttyWrite = (d, key) => {
|
|
key = key || {};
|
|
if (!self.editorMode || !self.terminal) {
|
|
ttyWrite(d, key);
|
|
return;
|
|
}
|
|
|
|
// editor mode
|
|
if (key.ctrl && !key.shift) {
|
|
switch (key.name) {
|
|
case 'd': // End editor mode
|
|
_turnOffEditorMode(self);
|
|
sawCtrlD = true;
|
|
ttyWrite(d, { name: 'return' });
|
|
break;
|
|
case 'n': // Override next history item
|
|
case 'p': // Override previous history item
|
|
break;
|
|
default:
|
|
ttyWrite(d, key);
|
|
}
|
|
} else {
|
|
switch (key.name) {
|
|
case 'up': // Override previous history item
|
|
case 'down': // Override next history item
|
|
break;
|
|
case 'tab':
|
|
// prevent double tab behavior
|
|
self._previousKey = null;
|
|
ttyWrite(d, key);
|
|
break;
|
|
default:
|
|
ttyWrite(d, key);
|
|
}
|
|
}
|
|
};
|
|
|
|
self.displayPrompt();
|
|
}
|
|
inherits(REPLServer, Interface);
|
|
exports.REPLServer = REPLServer;
|
|
|
|
exports.REPL_MODE_SLOPPY = Symbol('repl-sloppy');
|
|
exports.REPL_MODE_STRICT = Symbol('repl-strict');
|
|
exports.REPL_MODE_MAGIC = exports.REPL_MODE_SLOPPY;
|
|
|
|
// prompt is a string to print on each line for the prompt,
|
|
// source is a stream to use for I/O, defaulting to stdin/stdout.
|
|
exports.start = function(prompt,
|
|
source,
|
|
eval_,
|
|
useGlobal,
|
|
ignoreUndefined,
|
|
replMode) {
|
|
var repl = new REPLServer(prompt,
|
|
source,
|
|
eval_,
|
|
useGlobal,
|
|
ignoreUndefined,
|
|
replMode);
|
|
if (!exports.repl) exports.repl = repl;
|
|
replMap.set(repl, repl);
|
|
return repl;
|
|
};
|
|
|
|
REPLServer.prototype.clearBufferedCommand = function clearBufferedCommand() {
|
|
this[kBufferedCommandSymbol] = '';
|
|
};
|
|
|
|
REPLServer.prototype.close = function close() {
|
|
if (this.terminal && this._flushing && !this._closingOnFlush) {
|
|
this._closingOnFlush = true;
|
|
this.once('flushHistory', () =>
|
|
Interface.prototype.close.call(this)
|
|
);
|
|
|
|
return;
|
|
}
|
|
process.nextTick(() =>
|
|
Interface.prototype.close.call(this)
|
|
);
|
|
};
|
|
|
|
REPLServer.prototype.createContext = function() {
|
|
var context;
|
|
if (this.useGlobal) {
|
|
context = global;
|
|
} else {
|
|
context = vm.createContext();
|
|
context.global = context;
|
|
const _console = new Console(this.outputStream);
|
|
Object.defineProperty(context, 'console', {
|
|
configurable: true,
|
|
enumerable: true,
|
|
get: () => _console
|
|
});
|
|
|
|
var names = Object.getOwnPropertyNames(global);
|
|
for (var n = 0; n < names.length; n++) {
|
|
var name = names[n];
|
|
if (name === 'console' || name === 'global')
|
|
continue;
|
|
if (GLOBAL_OBJECT_PROPERTY_MAP[name] === undefined) {
|
|
Object.defineProperty(context, name,
|
|
Object.getOwnPropertyDescriptor(global, name));
|
|
}
|
|
}
|
|
}
|
|
|
|
var module = new Module('<repl>');
|
|
module.paths = Module._resolveLookupPaths('<repl>', parentModule, true) || [];
|
|
|
|
var require = internalModule.makeRequireFunction(module);
|
|
context.module = module;
|
|
context.require = require;
|
|
|
|
internalModule.addBuiltinLibsToObject(context);
|
|
|
|
return context;
|
|
};
|
|
|
|
REPLServer.prototype.resetContext = function() {
|
|
this.context = this.createContext();
|
|
this.underscoreAssigned = false;
|
|
this.lines = [];
|
|
this.lines.level = [];
|
|
|
|
Object.defineProperty(this.context, '_', {
|
|
configurable: true,
|
|
get: () => this.last,
|
|
set: (value) => {
|
|
this.last = value;
|
|
if (!this.underscoreAssigned) {
|
|
this.underscoreAssigned = true;
|
|
this.outputStream.write('Expression assignment to _ now disabled.\n');
|
|
}
|
|
}
|
|
});
|
|
|
|
// Allow REPL extensions to extend the new context
|
|
this.emit('reset', this.context);
|
|
};
|
|
|
|
REPLServer.prototype.displayPrompt = function(preserveCursor) {
|
|
var prompt = this._initialPrompt;
|
|
if (this[kBufferedCommandSymbol].length) {
|
|
prompt = '...';
|
|
const len = this.lines.level.length ? this.lines.level.length - 1 : 0;
|
|
const levelInd = '..'.repeat(len);
|
|
prompt += levelInd + ' ';
|
|
}
|
|
|
|
// Do not overwrite `_initialPrompt` here
|
|
REPLServer.super_.prototype.setPrompt.call(this, prompt);
|
|
this.prompt(preserveCursor);
|
|
};
|
|
|
|
// When invoked as an API method, overwrite _initialPrompt
|
|
REPLServer.prototype.setPrompt = function setPrompt(prompt) {
|
|
this._initialPrompt = prompt;
|
|
REPLServer.super_.prototype.setPrompt.call(this, prompt);
|
|
};
|
|
|
|
REPLServer.prototype.turnOffEditorMode = util.deprecate(
|
|
function() { _turnOffEditorMode(this); },
|
|
'REPLServer.turnOffEditorMode() is deprecated',
|
|
'DEP0078');
|
|
|
|
// A stream to push an array into a REPL
|
|
// used in REPLServer.complete
|
|
function ArrayStream() {
|
|
Stream.call(this);
|
|
|
|
this.run = function(data) {
|
|
for (var n = 0; n < data.length; n++)
|
|
this.emit('data', `${data[n]}\n`);
|
|
};
|
|
}
|
|
util.inherits(ArrayStream, Stream);
|
|
ArrayStream.prototype.readable = true;
|
|
ArrayStream.prototype.writable = true;
|
|
ArrayStream.prototype.resume = function() {};
|
|
ArrayStream.prototype.write = function() {};
|
|
|
|
const requireRE = /\brequire\s*\(['"](([\w@./-]+\/)?(?:[\w@./-]*))/;
|
|
const simpleExpressionRE =
|
|
/(?:[a-zA-Z_$](?:\w|\$)*\.)*[a-zA-Z_$](?:\w|\$)*\.?$/;
|
|
|
|
function intFilter(item) {
|
|
// filters out anything not starting with A-Z, a-z, $ or _
|
|
return /^[A-Za-z_$]/.test(item);
|
|
}
|
|
|
|
const ARRAY_LENGTH_THRESHOLD = 1e6;
|
|
|
|
function mayBeLargeObject(obj) {
|
|
if (Array.isArray(obj)) {
|
|
return obj.length > ARRAY_LENGTH_THRESHOLD ? ['length'] : null;
|
|
} else if (isTypedArray(obj)) {
|
|
return obj.length > ARRAY_LENGTH_THRESHOLD ? [] : null;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function filteredOwnPropertyNames(obj) {
|
|
if (!obj) return [];
|
|
const fakeProperties = mayBeLargeObject(obj);
|
|
if (fakeProperties !== null) {
|
|
this.outputStream.write('\r\n');
|
|
process.emitWarning(
|
|
'The current array, Buffer or TypedArray has too many entries. ' +
|
|
'Certain properties may be missing from completion output.',
|
|
'REPLWarning',
|
|
undefined,
|
|
undefined,
|
|
true);
|
|
|
|
return fakeProperties;
|
|
}
|
|
return Object.getOwnPropertyNames(obj).filter(intFilter);
|
|
}
|
|
|
|
REPLServer.prototype.complete = function() {
|
|
this.completer.apply(this, arguments);
|
|
};
|
|
|
|
// Provide a list of completions for the given leading text. This is
|
|
// given to the readline interface for handling tab completion.
|
|
//
|
|
// Example:
|
|
// complete('var foo = util.')
|
|
// -> [['util.print', 'util.debug', 'util.log', 'util.inspect'],
|
|
// 'util.' ]
|
|
//
|
|
// Warning: This eval's code like "foo.bar.baz", so it will run property
|
|
// getter code.
|
|
function complete(line, callback) {
|
|
// There may be local variables to evaluate, try a nested REPL
|
|
if (this[kBufferedCommandSymbol] !== undefined &&
|
|
this[kBufferedCommandSymbol].length) {
|
|
// Get a new array of inputted lines
|
|
var tmp = this.lines.slice();
|
|
// Kill off all function declarations to push all local variables into
|
|
// global scope
|
|
for (var n = 0; n < this.lines.level.length; n++) {
|
|
var kill = this.lines.level[n];
|
|
if (kill.isFunction)
|
|
tmp[kill.line] = '';
|
|
}
|
|
var flat = new ArrayStream(); // make a new "input" stream
|
|
var magic = new REPLServer('', flat); // make a nested REPL
|
|
replMap.set(magic, replMap.get(this));
|
|
magic.resetContext();
|
|
flat.run(tmp); // eval the flattened code
|
|
// all this is only profitable if the nested REPL
|
|
// does not have a bufferedCommand
|
|
if (!magic[kBufferedCommandSymbol]) {
|
|
return magic.complete(line, callback);
|
|
}
|
|
}
|
|
|
|
var completions;
|
|
|
|
// list of completion lists, one for each inheritance "level"
|
|
var completionGroups = [];
|
|
|
|
var completeOn, i, group, c;
|
|
|
|
// REPL commands (e.g. ".break").
|
|
var filter;
|
|
var match = null;
|
|
match = line.match(/^\s*\.(\w*)$/);
|
|
if (match) {
|
|
completionGroups.push(Object.keys(this.commands));
|
|
completeOn = match[1];
|
|
if (match[1].length) {
|
|
filter = match[1];
|
|
}
|
|
|
|
completionGroupsLoaded();
|
|
} else if (match = line.match(requireRE)) {
|
|
// require('...<Tab>')
|
|
const exts = Object.keys(this.context.require.extensions);
|
|
var indexRe = new RegExp('^index(?:' + exts.map(regexpEscape).join('|') +
|
|
')$');
|
|
var versionedFileNamesRe = /-\d+\.\d+/;
|
|
|
|
completeOn = match[1];
|
|
var subdir = match[2] || '';
|
|
filter = match[1];
|
|
var dir, files, f, name, base, ext, abs, subfiles, s, isDirectory;
|
|
group = [];
|
|
let paths = [];
|
|
|
|
if (completeOn === '.') {
|
|
group = ['./', '../'];
|
|
} else if (completeOn === '..') {
|
|
group = ['../'];
|
|
} else if (/^\.\.?\//.test(completeOn)) {
|
|
paths = [process.cwd()];
|
|
} else {
|
|
paths = module.paths.concat(Module.globalPaths);
|
|
}
|
|
|
|
for (i = 0; i < paths.length; i++) {
|
|
dir = path.resolve(paths[i], subdir);
|
|
try {
|
|
files = fs.readdirSync(dir);
|
|
} catch (e) {
|
|
continue;
|
|
}
|
|
for (f = 0; f < files.length; f++) {
|
|
name = files[f];
|
|
ext = path.extname(name);
|
|
base = name.slice(0, -ext.length);
|
|
if (versionedFileNamesRe.test(base) || name === '.npm') {
|
|
// Exclude versioned names that 'npm' installs.
|
|
continue;
|
|
}
|
|
abs = path.resolve(dir, name);
|
|
try {
|
|
isDirectory = fs.statSync(abs).isDirectory();
|
|
} catch (e) {
|
|
continue;
|
|
}
|
|
if (isDirectory) {
|
|
group.push(subdir + name + '/');
|
|
try {
|
|
subfiles = fs.readdirSync(abs);
|
|
} catch (e) {
|
|
continue;
|
|
}
|
|
for (s = 0; s < subfiles.length; s++) {
|
|
if (indexRe.test(subfiles[s])) {
|
|
group.push(subdir + name);
|
|
}
|
|
}
|
|
} else if (exts.includes(ext) && (!subdir || base !== 'index')) {
|
|
group.push(subdir + base);
|
|
}
|
|
}
|
|
}
|
|
if (group.length) {
|
|
completionGroups.push(group);
|
|
}
|
|
|
|
if (!subdir) {
|
|
completionGroups.push(exports._builtinLibs);
|
|
}
|
|
|
|
completionGroupsLoaded();
|
|
|
|
// Handle variable member lookup.
|
|
// We support simple chained expressions like the following (no function
|
|
// calls, etc.). That is for simplicity and also because we *eval* that
|
|
// leading expression so for safety (see WARNING above) don't want to
|
|
// eval function calls.
|
|
//
|
|
// foo.bar<|> # completions for 'foo' with filter 'bar'
|
|
// spam.eggs.<|> # completions for 'spam.eggs' with filter ''
|
|
// foo<|> # all scope vars with filter 'foo'
|
|
// foo.<|> # completions for 'foo' with filter ''
|
|
} else if (line.length === 0 || /\w|\.|\$/.test(line[line.length - 1])) {
|
|
match = simpleExpressionRE.exec(line);
|
|
if (line.length === 0 || match) {
|
|
var expr;
|
|
completeOn = (match ? match[0] : '');
|
|
if (line.length === 0) {
|
|
filter = '';
|
|
expr = '';
|
|
} else if (line[line.length - 1] === '.') {
|
|
filter = '';
|
|
expr = match[0].slice(0, match[0].length - 1);
|
|
} else {
|
|
var bits = match[0].split('.');
|
|
filter = bits.pop();
|
|
expr = bits.join('.');
|
|
}
|
|
|
|
// Resolve expr and get its completions.
|
|
var memberGroups = [];
|
|
if (!expr) {
|
|
// If context is instance of vm.ScriptContext
|
|
// Get global vars synchronously
|
|
if (this.useGlobal || vm.isContext(this.context)) {
|
|
var contextProto = this.context;
|
|
while (contextProto = Object.getPrototypeOf(contextProto)) {
|
|
completionGroups.push(
|
|
filteredOwnPropertyNames.call(this, contextProto));
|
|
}
|
|
completionGroups.push(
|
|
filteredOwnPropertyNames.call(this, this.context));
|
|
addStandardGlobals(completionGroups, filter);
|
|
completionGroupsLoaded();
|
|
} else {
|
|
this.eval('.scope', this.context, 'repl', function ev(err, globals) {
|
|
if (err || !Array.isArray(globals)) {
|
|
addStandardGlobals(completionGroups, filter);
|
|
} else if (Array.isArray(globals[0])) {
|
|
// Add grouped globals
|
|
for (var n = 0; n < globals.length; n++)
|
|
completionGroups.push(globals[n]);
|
|
} else {
|
|
completionGroups.push(globals);
|
|
addStandardGlobals(completionGroups, filter);
|
|
}
|
|
completionGroupsLoaded();
|
|
});
|
|
}
|
|
} else {
|
|
const evalExpr = `try { ${expr} } catch (e) {}`;
|
|
this.eval(evalExpr, this.context, 'repl', (e, obj) => {
|
|
if (obj != null) {
|
|
if (typeof obj === 'object' || typeof obj === 'function') {
|
|
try {
|
|
memberGroups.push(filteredOwnPropertyNames.call(this, obj));
|
|
} catch (ex) {
|
|
// Probably a Proxy object without `getOwnPropertyNames` trap.
|
|
// We simply ignore it here, as we don't want to break the
|
|
// autocompletion. Fixes the bug
|
|
// https://github.com/nodejs/node/issues/2119
|
|
}
|
|
}
|
|
// works for non-objects
|
|
try {
|
|
var sentinel = 5;
|
|
var p;
|
|
if (typeof obj === 'object' || typeof obj === 'function') {
|
|
p = Object.getPrototypeOf(obj);
|
|
} else {
|
|
p = obj.constructor ? obj.constructor.prototype : null;
|
|
}
|
|
while (p !== null) {
|
|
memberGroups.push(filteredOwnPropertyNames.call(this, p));
|
|
p = Object.getPrototypeOf(p);
|
|
// Circular refs possible? Let's guard against that.
|
|
sentinel--;
|
|
if (sentinel <= 0) {
|
|
break;
|
|
}
|
|
}
|
|
} catch (e) {
|
|
//console.log("completion error walking prototype chain:" + e);
|
|
}
|
|
}
|
|
|
|
if (memberGroups.length) {
|
|
for (i = 0; i < memberGroups.length; i++) {
|
|
completionGroups.push(memberGroups[i].map(function(member) {
|
|
return expr + '.' + member;
|
|
}));
|
|
}
|
|
if (filter) {
|
|
filter = expr + '.' + filter;
|
|
}
|
|
}
|
|
|
|
completionGroupsLoaded();
|
|
});
|
|
}
|
|
} else {
|
|
completionGroupsLoaded();
|
|
}
|
|
} else {
|
|
completionGroupsLoaded();
|
|
}
|
|
|
|
// Will be called when all completionGroups are in place
|
|
// Useful for async autocompletion
|
|
function completionGroupsLoaded() {
|
|
// Filter, sort (within each group), uniq and merge the completion groups.
|
|
if (completionGroups.length && filter) {
|
|
var newCompletionGroups = [];
|
|
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(uniq, 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]);
|
|
}
|
|
}
|
|
|
|
function longestCommonPrefix(arr = []) {
|
|
const cnt = arr.length;
|
|
if (cnt === 0) return '';
|
|
if (cnt === 1) return arr[0];
|
|
|
|
const first = arr[0];
|
|
// complexity: O(m * n)
|
|
for (var m = 0; m < first.length; m++) {
|
|
const c = first[m];
|
|
for (var n = 1; n < cnt; n++) {
|
|
const entry = arr[n];
|
|
if (m >= entry.length || c !== entry[m]) {
|
|
return first.substring(0, m);
|
|
}
|
|
}
|
|
}
|
|
return first;
|
|
}
|
|
|
|
REPLServer.prototype.completeOnEditorMode = (callback) => (err, results) => {
|
|
if (err) return callback(err);
|
|
|
|
const [completions, completeOn = ''] = results;
|
|
const prefixLength = completeOn.length;
|
|
|
|
if (prefixLength === 0) return callback(null, [[], completeOn]);
|
|
|
|
const isNotEmpty = (v) => v.length > 0;
|
|
const trimCompleteOnPrefix = (v) => v.substring(prefixLength);
|
|
const data = completions.filter(isNotEmpty).map(trimCompleteOnPrefix);
|
|
|
|
callback(null, [[`${completeOn}${longestCommonPrefix(data)}`], completeOn]);
|
|
};
|
|
|
|
REPLServer.prototype.defineCommand = function(keyword, cmd) {
|
|
if (typeof cmd === 'function') {
|
|
cmd = { action: cmd };
|
|
} else if (typeof cmd.action !== 'function') {
|
|
throw new errors.TypeError('ERR_INVALID_ARG_TYPE',
|
|
'action',
|
|
'function',
|
|
cmd.action);
|
|
}
|
|
this.commands[keyword] = cmd;
|
|
};
|
|
|
|
REPLServer.prototype.memory = function memory(cmd) {
|
|
var self = this;
|
|
|
|
self.lines = self.lines || [];
|
|
self.lines.level = self.lines.level || [];
|
|
|
|
// save the line so I can do magic later
|
|
if (cmd) {
|
|
// TODO should I tab the level?
|
|
const len = self.lines.level.length ? self.lines.level.length - 1 : 0;
|
|
self.lines.push(' '.repeat(len) + cmd);
|
|
} else {
|
|
// I don't want to not change the format too much...
|
|
self.lines.push('');
|
|
}
|
|
|
|
// I need to know "depth."
|
|
// Because I can not tell the difference between a } that
|
|
// closes an object literal and a } that closes a function
|
|
if (cmd) {
|
|
// going down is { and ( e.g. function() {
|
|
// going up is } and )
|
|
var dw = cmd.match(/{|\(/g);
|
|
var up = cmd.match(/}|\)/g);
|
|
up = up ? up.length : 0;
|
|
dw = dw ? dw.length : 0;
|
|
var depth = dw - up;
|
|
|
|
if (depth) {
|
|
(function workIt() {
|
|
if (depth > 0) {
|
|
// going... down.
|
|
// push the line#, depth count, and if the line is a function.
|
|
// Since JS only has functional scope I only need to remove
|
|
// "function() {" lines, clearly this will not work for
|
|
// "function()
|
|
// {" but nothing should break, only tab completion for local
|
|
// scope will not work for this function.
|
|
self.lines.level.push({
|
|
line: self.lines.length - 1,
|
|
depth: depth,
|
|
isFunction: /\bfunction\b/.test(cmd)
|
|
});
|
|
} else if (depth < 0) {
|
|
// going... up.
|
|
var curr = self.lines.level.pop();
|
|
if (curr) {
|
|
var tmp = curr.depth + depth;
|
|
if (tmp < 0) {
|
|
//more to go, recurse
|
|
depth += curr.depth;
|
|
workIt();
|
|
} else if (tmp > 0) {
|
|
//remove and push back
|
|
curr.depth += depth;
|
|
self.lines.level.push(curr);
|
|
}
|
|
}
|
|
}
|
|
}());
|
|
}
|
|
|
|
// it is possible to determine a syntax error at this point.
|
|
// if the REPL still has a bufferedCommand and
|
|
// self.lines.level.length === 0
|
|
// TODO? keep a log of level so that any syntax breaking lines can
|
|
// be cleared on .break and in the case of a syntax error?
|
|
// TODO? if a log was kept, then I could clear the bufferedCommand and
|
|
// eval these lines and throw the syntax error
|
|
} else {
|
|
self.lines.level = [];
|
|
}
|
|
};
|
|
|
|
function addStandardGlobals(completionGroups, filter) {
|
|
// Global object properties
|
|
// (http://www.ecma-international.org/publications/standards/Ecma-262.htm)
|
|
completionGroups.push(GLOBAL_OBJECT_PROPERTIES);
|
|
// Common keywords. Exclude for completion on the empty string, b/c
|
|
// they just get in the way.
|
|
if (filter) {
|
|
completionGroups.push([
|
|
'break', 'case', 'catch', 'const', 'continue', 'debugger', 'default',
|
|
'delete', 'do', 'else', 'export', 'false', 'finally', 'for', 'function',
|
|
'if', 'import', 'in', 'instanceof', 'let', 'new', 'null', 'return',
|
|
'switch', 'this', 'throw', 'true', 'try', 'typeof', 'undefined', 'var',
|
|
'void', 'while', 'with', 'yield'
|
|
]);
|
|
}
|
|
}
|
|
|
|
function _turnOnEditorMode(repl) {
|
|
repl.editorMode = true;
|
|
REPLServer.super_.prototype.setPrompt.call(repl, '');
|
|
}
|
|
|
|
function _turnOffEditorMode(repl) {
|
|
repl.editorMode = false;
|
|
repl.setPrompt(repl._initialPrompt);
|
|
}
|
|
|
|
function defineDefaultCommands(repl) {
|
|
repl.defineCommand('break', {
|
|
help: 'Sometimes you get stuck, this gets you out',
|
|
action: function() {
|
|
this.clearBufferedCommand();
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
var clearMessage;
|
|
if (repl.useGlobal) {
|
|
clearMessage = 'Alias for .break';
|
|
} else {
|
|
clearMessage = 'Break, and also clear the local context';
|
|
}
|
|
repl.defineCommand('clear', {
|
|
help: clearMessage,
|
|
action: function() {
|
|
this.clearBufferedCommand();
|
|
if (!this.useGlobal) {
|
|
this.outputStream.write('Clearing context...\n');
|
|
this.resetContext();
|
|
}
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('exit', {
|
|
help: 'Exit the repl',
|
|
action: function() {
|
|
this.close();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('help', {
|
|
help: 'Print this help message',
|
|
action: function() {
|
|
const names = Object.keys(this.commands).sort();
|
|
const longestNameLength = names.reduce(
|
|
(max, name) => Math.max(max, name.length),
|
|
0
|
|
);
|
|
for (var n = 0; n < names.length; n++) {
|
|
var name = names[n];
|
|
var cmd = this.commands[name];
|
|
var spaces = ' '.repeat(longestNameLength - name.length + 3);
|
|
var line = `.${name}${cmd.help ? spaces + cmd.help : ''}\n`;
|
|
this.outputStream.write(line);
|
|
}
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('save', {
|
|
help: 'Save all evaluated commands in this REPL session to a file',
|
|
action: function(file) {
|
|
try {
|
|
fs.writeFileSync(file, this.lines.join('\n') + '\n');
|
|
this.outputStream.write('Session saved to:' + file + '\n');
|
|
} catch (e) {
|
|
this.outputStream.write('Failed to save:' + file + '\n');
|
|
}
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('load', {
|
|
help: 'Load JS from a file into the REPL session',
|
|
action: function(file) {
|
|
try {
|
|
var stats = fs.statSync(file);
|
|
if (stats && stats.isFile()) {
|
|
_turnOnEditorMode(this);
|
|
var data = fs.readFileSync(file, 'utf8');
|
|
var lines = data.split('\n');
|
|
for (var n = 0; n < lines.length; n++) {
|
|
if (lines[n])
|
|
this.write(`${lines[n]}\n`);
|
|
}
|
|
_turnOffEditorMode(this);
|
|
this.write('\n');
|
|
} else {
|
|
this.outputStream.write('Failed to load:' + file +
|
|
' is not a valid file\n');
|
|
}
|
|
} catch (e) {
|
|
this.outputStream.write('Failed to load:' + file + '\n');
|
|
}
|
|
this.displayPrompt();
|
|
}
|
|
});
|
|
|
|
repl.defineCommand('editor', {
|
|
help: 'Enter editor mode',
|
|
action() {
|
|
if (!this.terminal) return;
|
|
_turnOnEditorMode(this);
|
|
this.outputStream.write(
|
|
'// Entering editor mode (^D to finish, ^C to cancel)\n');
|
|
}
|
|
});
|
|
}
|
|
|
|
function regexpEscape(s) {
|
|
return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
|
|
}
|
|
|
|
// If the error is that we've unexpectedly ended the input,
|
|
// then let the user try to recover by adding more input.
|
|
function isRecoverableError(e, code) {
|
|
if (e && e.name === 'SyntaxError') {
|
|
var message = e.message;
|
|
if (message === 'Unterminated template literal' ||
|
|
message === 'Missing } in template expression') {
|
|
return true;
|
|
}
|
|
|
|
if (message.startsWith('Unexpected end of input') ||
|
|
message.startsWith('missing ) after argument list') ||
|
|
message.startsWith('Unexpected token'))
|
|
return true;
|
|
|
|
if (message === 'Invalid or unexpected token')
|
|
return isCodeRecoverable(code);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Check whether a code snippet should be forced to fail in the REPL.
|
|
function isCodeRecoverable(code) {
|
|
var current, previous, stringLiteral;
|
|
var isBlockComment = false;
|
|
var isSingleComment = false;
|
|
var isRegExpLiteral = false;
|
|
var lastChar = code.charAt(code.length - 2);
|
|
var prevTokenChar = null;
|
|
|
|
for (var i = 0; i < code.length; i++) {
|
|
previous = current;
|
|
current = code[i];
|
|
|
|
if (previous === '\\' && (stringLiteral || isRegExpLiteral)) {
|
|
current = null;
|
|
continue;
|
|
}
|
|
|
|
if (stringLiteral) {
|
|
if (stringLiteral === current) {
|
|
stringLiteral = null;
|
|
}
|
|
continue;
|
|
} else {
|
|
if (isRegExpLiteral && current === '/') {
|
|
isRegExpLiteral = false;
|
|
continue;
|
|
}
|
|
|
|
if (isBlockComment && previous === '*' && current === '/') {
|
|
isBlockComment = false;
|
|
continue;
|
|
}
|
|
|
|
if (isSingleComment && current === '\n') {
|
|
isSingleComment = false;
|
|
continue;
|
|
}
|
|
|
|
if (isBlockComment || isRegExpLiteral || isSingleComment) continue;
|
|
|
|
if (current === '/' && previous === '/') {
|
|
isSingleComment = true;
|
|
continue;
|
|
}
|
|
|
|
if (previous === '/') {
|
|
if (current === '*') {
|
|
isBlockComment = true;
|
|
} else if (
|
|
// Distinguish between a division operator and the start of a regex
|
|
// by examining the non-whitespace character that precedes the /
|
|
[null, '(', '[', '{', '}', ';'].includes(prevTokenChar)
|
|
) {
|
|
isRegExpLiteral = true;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (current.trim()) prevTokenChar = current;
|
|
}
|
|
|
|
if (current === '\'' || current === '"') {
|
|
stringLiteral = current;
|
|
}
|
|
}
|
|
|
|
return stringLiteral ? lastChar === '\\' : isBlockComment;
|
|
}
|
|
|
|
function Recoverable(err) {
|
|
this.err = err;
|
|
}
|
|
inherits(Recoverable, SyntaxError);
|
|
exports.Recoverable = Recoverable;
|
|
|