| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011 |
13
13
13
13
13
13
13
13
13
13
13
13
13
13
38
13
13
13
13
29
29
29
13
13
13
13
13
13
13
13
13
13
16
16
29
29
29
29
29
29
29
29
13
131
131
132
132
3
132
67
67
1
1
66
56
10
131
131
65
65
26
39
13
13
13
13
13
13
118
29
29
22
22
22
22
22
29
17
2
17
2
2
15
15
29
29
29
29
29
13
29
29
29
29
29
29
25
29
29
2
29
29
6
29
29
29
133
133
133
133
2
131
133
14
14
14
14
14
119
119
119
3
116
119
119
13
110
110
110
1
1
1
1
109
65
56
56
56
9
53
53
44
44
53
29
29
13
13
13
13
13
13
19
19
19
13
49
49
5
44
898
44
44
44
49
49
49
49
49
1372
2
2
2
4
4
49
13
40
40
13
176
176
58
58
58
176
176
13
88
88
13
9
9
9
9
30
13
13
13
13
13
13
13
13
20
9
9
11
9
9
9
9
9
9
7
13
13
13
13
13
13
13
13
13
13
13
13
13
1
1
12
12
12
12
13
13
1
1
1
1
1
12
8
8
8
8
8
8
8
8
8
9
9
9
9
8
8
17
125
8
8
8
13
9
9
8
8
17
125
17
9
8
9
9
9
9
10
10
10
38
38
37
37
10
9
10
9
13
14
14
14
14
13
174
174
174
13
110
110
110
110
99
11
110
99
99
99
99
99
99
42
42
27
15
15
15
12
12
12
11
13
1
1
13
29
2
2
29
29
4
25
29
9
9
9
9
9
29
29
29
1
1
1
1
29
2
2
1
1
1
1
1
1
3
2
1
2
13
131
131
131
120
11
13
13
13
66
66
66
2
2
64
13
56
13
| (function () { /* A repl library that you can include in your own code to get a runtime
* interface to your program.
*
* var repl = require("repl");
* // start repl on stdin
* repl.start("prompt> ");
*
* // listen for unix socket connections and start repl on them
* net.createServer(function(socket) {
* repl.start("node via Unix socket> ", socket);
* }).listen("/tmp/node-repl-sock");
*
* // listen for TCP socket connections and start repl on them
* net.createServer(function(socket) {
* repl.start("node via TCP socket> ", socket);
* }).listen(5001);
*
* // expose foo to repl context
* repl.start("node > ").context.foo = "stdin is fun";
*/
'use strict';
const util = require('util');
const inherits = util.inherits;
const Stream = require('stream');
const vm = require('vm');
const path = require('path');
const fs = require('fs');
const rl = require('readline');
const Console = require('console').Console;
const domain = require('domain');
const debug = util.debuglog('repl');
try {
// hack for require.resolve("./relative") to work properly.
module.filename = path.resolve('repl');
} catch (e) {
// path.resolve('repl') fails when the current working directory has been
// deleted. Fall back to the directory name of the (absolute) executable
// path. It's not really correct but what are the alternatives?
const dirname = path.dirname(process.execPath);
module.filename = path.resolve(dirname, 'repl');
}
// hack for repl require to work properly with node_modules folders
module.paths = require('module')._nodeModulePaths(module.filename);
// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty(obj, prop) {
return Object.prototype.hasOwnProperty.call(obj, prop);
}
// Can overridden with custom print functions, such as `probe` or `eyes.js`.
// This is the default "writer" value if none is passed in the REPL options.
exports.writer = util.inspect;
exports._builtinLibs = ['assert', 'buffer', 'child_process', 'cluster',
'crypto', 'dgram', 'dns', 'domain', 'events', 'fs', 'http', 'https', 'net',
'os', 'path', 'punycode', 'querystring', 'readline', 'stream',
'string_decoder', 'tls', 'tty', 'url', 'util', 'v8', 'vm', 'zlib',
'smalloc'];
const BLOCK_SCOPED_ERROR = 'Block-scoped declarations (let, ' +
'const, function, class) not yet supported outside strict mode';
function REPLServer(prompt,
stream,
eval_,
useGlobal,
ignoreUndefined,
replMode) {
Iif (!(this instanceof REPLServer)) {
return new REPLServer(prompt,
stream,
eval_,
useGlobal,
ignoreUndefined,
replMode);
}
var options, input, output, dom;
if (prompt !== null && typeof prompt === 'object') {
// an options object was given
options = prompt;
stream = options.stream || options.socket;
input = options.input;
output = options.output;
eval_ = options.eval;
useGlobal = options.useGlobal;
ignoreUndefined = options.ignoreUndefined;
prompt = options.prompt;
dom = options.domain;
replMode = options.replMode;
} else Iif (typeof prompt !== 'string') {
throw new Error('An options Object, or a prompt String are required');
} else {
options = {};
}
var self = this;
self._domain = dom || domain.create();
self.useGlobal = !!useGlobal;
self.ignoreUndefined = !!ignoreUndefined;
self.replMode = replMode || exports.REPL_MODE_SLOPPY;
self._inTemplateLiteral = false;
// just for backwards compat, see github.com/joyent/node/pull/7127
self.rli = this;
eval_ = eval_ || defaultEval;
function defaultEval(code, context, file, cb) {
var err, result, retry = false;
// first, create the Script object to check the syntax
while (true) {
try {
if (!/^\s*$/.test(code) &&
(self.replMode === exports.REPL_MODE_STRICT || retry)) {
// "void 0" keeps the repl from returning "use strict" as the
// result value for let/const statements.
code = `'use strict'; void 0; ${code}`;
}
var script = vm.createScript(code, {
filename: file,
displayErrors: false
});
} catch (e) {
debug('parse error %j', code, e);
if (self.replMode === exports.REPL_MODE_MAGIC &&
e.message === BLOCK_SCOPED_ERROR &&
!retry) {
retry = true;
continue;
}
if (isRecoverableError(e, self))
err = new Recoverable(e);
else
err = e;
}
break;
}
if (!err) {
try {
if (self.useGlobal) {
result = script.runInThisContext({ displayErrors: false });
} else {
result = script.runInContext(context, { displayErrors: false });
}
} catch (e) {
err = e;
Eif (err && process.domain) {
debug('not recoverable, send to domain');
process.domain.emit('error', err);
process.domain.exit();
return;
}
}
}
cb(err, result);
}
self.eval = self._domain.bind(eval_);
self._domain.on('error', function(e) {
debug('domain error');
self.outputStream.write((e.stack || e) + '\n');
self.bufferedCommand = '';
self.lines.level = [];
self.displayPrompt();
});
if (!input && !output) {
// legacy API, passing a 'stream'/'socket' option
if (!stream) {
// use stdin and stdout as the default streams if none were given
stream = process;
}
if (stream.stdin && stream.stdout) {
// We're given custom object with 2 streams, or the `process` object
input = stream.stdin;
output = stream.stdout;
} else {
// We're given a duplex readable/writable Stream, like a `net.Socket`
input = stream;
output = stream;
}
}
self.inputStream = input;
self.outputStream = output;
self.resetContext();
self.bufferedCommand = '';
self.lines.level = [];
function complete(text, callback) {
self.complete(text, callback);
}
rl.Interface.call(this, {
input: self.inputStream,
output: self.outputStream,
completer: complete,
terminal: options.terminal,
historySize: options.historySize
});
self.setPrompt(prompt !== undefined ? prompt : '> ');
this.commands = {};
defineDefaultCommands(this);
// figure out which "writer" function to use
self.writer = options.writer || exports.writer;
if (options.useColors === undefined) {
options.useColors = self.terminal;
}
self.useColors = !!options.useColors;
if (self.useColors && self.writer === util.inspect) {
// Turn on ANSI coloring.
self.writer = function(obj, showHidden, depth) {
return util.inspect(obj, showHidden, depth, true);
};
}
self.setPrompt(self._prompt);
self.on('close', function() {
self.emit('exit');
});
var sawSIGINT = false;
self.on('SIGINT', function() {
var empty = self.line.length === 0;
self.clearLine();
if (!(self.bufferedCommand && self.bufferedCommand.length > 0) && empty) {
if (sawSIGINT) {
self.close();
sawSIGINT = false;
return;
}
self.output.write('(^C again to quit)\n');
sawSIGINT = true;
} else {
sawSIGINT = false;
}
self.bufferedCommand = '';
self.lines.level = [];
self.displayPrompt();
});
self.on('line', function(cmd) {
debug('line %j', cmd);
sawSIGINT = false;
var skipCatchall = false;
// leading whitespaces in template literals should not be trimmed.
if (self._inTemplateLiteral) {
self._inTemplateLiteral = false;
} else {
cmd = trimWhitespace(cmd);
}
// Check to see if a REPL keyword was used. If it returns true,
// display next prompt and return.
if (cmd && cmd.charAt(0) === '.' && isNaN(parseFloat(cmd))) {
var matches = cmd.match(/^\.([^\s]+)\s*(.*)$/);
var keyword = matches && matches[1];
var rest = matches && matches[2];
Eif (self.parseREPLKeyword(keyword, rest) === true) {
return;
} else {
self.outputStream.write('Invalid REPL keyword\n');
skipCatchall = true;
}
}
Eif (!skipCatchall) {
var evalCmd = self.bufferedCommand + cmd;
if (/^\s*\{/.test(evalCmd) && /\}\s*$/.test(evalCmd)) {
// It's confusing for `{ a : 1 }` to be interpreted as a block
// statement rather than an object literal. So, we first try
// to wrap it in parentheses, so that it will be interpreted as
// an expression.
evalCmd = '(' + evalCmd + ')\n';
} else {
// otherwise we just append a \n so that it will be either
// terminated, or continued onto the next expression if it's an
// unexpected end of input.
evalCmd = evalCmd + '\n';
}
debug('eval %j', evalCmd);
self.eval(evalCmd, self.context, 'repl', finish);
} else {
finish(null);
}
function finish(e, ret) {
debug('finish', e, ret);
self.memory(cmd);
if (e && !self.bufferedCommand && cmd.trim().match(/^npm /)) {
self.outputStream.write('npm should be run outside of the ' +
'node repl, in your normal shell.\n' +
'(Press Control-D to exit.)\n');
self.bufferedCommand = '';
self.displayPrompt();
return;
}
// If error was SyntaxError and not JSON.parse error
if (e) {
if (e instanceof Recoverable) {
// Start buffering data like that:
// {
// ... x: 1
// ... }
self.bufferedCommand += cmd + '\n';
self.displayPrompt();
return;
} else {
self._domain.emit('error', e);
}
}
// Clear buffer if no SyntaxErrors
self.bufferedCommand = '';
// If we got any output - print it (if no error)
if (!e && (!self.ignoreUndefined || ret !== undefined)) {
self.context._ = ret;
self.outputStream.write(self.writer(ret) + '\n');
}
// Display prompt again
self.displayPrompt();
}
});
self.on('SIGCONT', function() {
self.displayPrompt(true);
});
self.displayPrompt();
}
inherits(REPLServer, rl.Interface);
exports.REPLServer = REPLServer;
exports.REPL_MODE_SLOPPY = Symbol('repl-sloppy');
exports.REPL_MODE_STRICT = Symbol('repl-strict');
exports.REPL_MODE_MAGIC = Symbol('repl-magic');
// 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;
return repl;
};
REPLServer.prototype.createContext = function() {
var context;
if (this.useGlobal) {
context = global;
} else {
context = vm.createContext();
for (var i in global) context[i] = global[i];
context.console = new Console(this.outputStream);
context.global = context;
context.global.global = context;
}
context.module = module;
context.require = require;
this.lines = [];
this.lines.level = [];
// make built-in modules available directly
// (loaded lazily)
exports._builtinLibs.forEach(function(name) {
Object.defineProperty(context, name, {
get: function() {
var lib = require(name);
context._ = context[name] = lib;
return lib;
},
// allow the creation of other globals with this name
set: function(val) {
delete context[name];
context[name] = val;
},
configurable: true
});
});
return context;
};
REPLServer.prototype.resetContext = function() {
this.context = this.createContext();
// Allow REPL extensions to extend the new context
this.emit('reset', this.context);
};
REPLServer.prototype.displayPrompt = function(preserveCursor) {
var prompt = this._initialPrompt;
if (this.bufferedCommand.length) {
prompt = '...';
var levelInd = new Array(this.lines.level.length).join('..');
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);
};
// A stream to push an array into a REPL
// used in REPLServer.complete
function ArrayStream() {
Stream.call(this);
this.run = function(data) {
var self = this;
data.forEach(function(line) {
self.emit('data', line + '\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|\$)*)\.?$/;
// Provide a list of completions for the given leading text. This is
// given to the readline interface for handling tab completion.
//
// Example:
// complete('var foo = util.')
// -> [['util.print', 'util.debug', 'util.log', 'util.inspect', 'util.pump'],
// 'util.' ]
//
// Warning: This eval's code like "foo.bar.baz", so it will run property
// getter code.
REPLServer.prototype.complete = function(line, callback) {
// There may be local variables to evaluate, try a nested REPL
if (this.bufferedCommand !== undefined && this.bufferedCommand.length) {
// Get a new array of inputed lines
var tmp = this.lines.slice();
// Kill off all function declarations to push all local variables into
// global scope
this.lines.level.forEach(function(kill) {
if (kill.isFunction) {
tmp[kill.line] = '';
}
});
var flat = new ArrayStream(); // make a new "input" stream
var magic = new REPLServer('', flat); // make a nested REPL
magic.context = magic.createContext();
flat.run(tmp); // eval the flattened code
// all this is only profitable if the nested REPL
// does not have a bufferedCommand
if (!magic.bufferedCommand) {
return magic.complete(line, callback);
}
}
var completions;
// list of completion lists, one for each inheritance "level"
var completionGroups = [];
var completeOn, match, filter, i, group, c;
// REPL commands (e.g. ".break").
var match = null;
match = line.match(/^\s*(\.\w*)$/);
Iif (match) {
completionGroups.push(Object.keys(this.commands));
completeOn = match[1];
if (match[1].length > 1) {
filter = match[1];
}
completionGroupsLoaded();
} else Iif (match = line.match(requireRE)) {
// require('...<Tab>')
var exts = Object.keys(require.extensions);
var indexRe = new RegExp('^index(' + exts.map(regexpEscape).join('|') +
')$');
completeOn = match[1];
var subdir = match[2] || '';
var filter = match[1];
var dir, files, f, name, base, ext, abs, subfiles, s;
group = [];
var paths = module.paths.concat(require('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 (base.match(/-\d+\.\d+(\.\d+)?/) || name === '.npm') {
// Exclude versioned names that 'npm' installs.
continue;
}
if (exts.indexOf(ext) !== -1) {
if (!subdir || base !== 'index') {
group.push(subdir + base);
}
} else {
abs = path.resolve(dir, name);
try {
if (fs.statSync(abs).isDirectory()) {
group.push(subdir + name + '/');
subfiles = fs.readdirSync(abs);
for (s = 0; s < subfiles.length; s++) {
if (indexRe.test(subfiles[s])) {
group.push(subdir + name);
}
}
}
} catch (e) {}
}
}
}
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 Eif (line.length === 0 || line[line.length - 1].match(/\w|\.|\$/)) {
match = simpleExpressionRE.exec(line);
Eif (line.length === 0 || match) {
var expr;
completeOn = (match ? match[0] : '');
if (line.length === 0) {
filter = '';
expr = '';
} else Iif (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
Iif (this.useGlobal ||
this.context.constructor &&
this.context.constructor.name === 'Context') {
var contextProto = this.context;
while (contextProto = Object.getPrototypeOf(contextProto)) {
completionGroups.push(Object.getOwnPropertyNames(contextProto));
}
completionGroups.push(Object.getOwnPropertyNames(this.context));
addStandardGlobals(completionGroups, filter);
completionGroupsLoaded();
} else {
this.eval('.scope', this.context, 'repl', function(err, globals) {
Eif (err || !Array.isArray(globals)) {
addStandardGlobals(completionGroups, filter);
} else if (Array.isArray(globals[0])) {
// Add grouped globals
globals.forEach(function(group) {
completionGroups.push(group);
});
} else {
completionGroups.push(globals);
addStandardGlobals(completionGroups, filter);
}
completionGroupsLoaded();
});
}
} else {
this.eval(expr, this.context, 'repl', function(e, obj) {
// if (e) console.log(e);
Eif (obj != null) {
Eif (typeof obj === 'object' || typeof obj === 'function') {
memberGroups.push(Object.getOwnPropertyNames(obj));
}
// works for non-objects
try {
var sentinel = 5;
var p;
Eif (typeof obj === 'object' || typeof obj === 'function') {
p = Object.getPrototypeOf(obj);
} else {
p = obj.constructor ? obj.constructor.prototype : null;
}
while (p !== null) {
memberGroups.push(Object.getOwnPropertyNames(p));
p = Object.getPrototypeOf(p);
// Circular refs possible? Let's guard against that.
sentinel--;
Iif (sentinel <= 0) {
break;
}
}
} catch (e) {
//console.log("completion error walking prototype chain:" + e);
}
}
Eif (memberGroups.length) {
for (i = 0; i < memberGroups.length; i++) {
completionGroups.push(memberGroups[i].map(function(member) {
return expr + '.' + member;
}));
}
Eif (filter) {
filter = expr + '.' + filter;
}
}
completionGroupsLoaded();
});
}
} else {
completionGroupsLoaded();
}
} else {
completionGroupsLoaded();
}
// Will be called when all completionGroups are in place
// Useful for async autocompletion
function completionGroupsLoaded(err) {
Iif (err) throw err;
// 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;
}
Eif (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]);
}
};
/**
* 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];
Eif (cmd) {
cmd.action.call(this, rest);
return true;
}
return false;
};
REPLServer.prototype.defineCommand = function(keyword, cmd) {
Iif (typeof cmd === 'function') {
cmd = {action: cmd};
} else Iif (typeof cmd.action !== 'function') {
throw new Error('bad argument, action must be a function');
}
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?
self.lines.push(new Array(self.lines.level.length).join(' ') + 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: /\s*function\s*/.test(cmd)
});
} else Eif (depth < 0) {
// going... up.
var curr = self.lines.level.pop();
if (curr) {
var tmp = curr.depth + depth;
Iif (tmp < 0) {
//more to go, recurse
depth += curr.depth;
workIt();
} else Iif (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 bufferedComand 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(['NaN', 'Infinity', 'undefined',
'eval', 'parseInt', 'parseFloat', 'isNaN', 'isFinite', 'decodeURI',
'decodeURIComponent', 'encodeURI', 'encodeURIComponent',
'Object', 'Function', 'Array', 'String', 'Boolean', 'Number',
'Date', 'RegExp', 'Error', 'EvalError', 'RangeError',
'ReferenceError', 'SyntaxError', 'TypeError', 'URIError',
'Math', 'JSON']);
// Common keywords. Exclude for completion on the empty string, b/c
// they just get in the way.
Iif (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 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();
}
});
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.bufferedCommand = '';
Eif (!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: '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();
}
});
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);
Eif (stats && stats.isFile()) {
var self = this;
var data = fs.readFileSync(file, 'utf8');
var lines = data.split('\n');
this.displayPrompt();
lines.forEach(function(line) {
if (line) {
self.write(line + '\n');
}
});
}
} catch (e) {
this.outputStream.write('Failed to load:' + file + '\n');
}
this.displayPrompt();
}
});
}
function trimWhitespace(cmd) {
const trimmer = /^\s*(.+)\s*$/m;
var matches = trimmer.exec(cmd);
if (matches && matches.length === 2) {
return matches[1];
}
return '';
}
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) {
const scopeVar = /^\s*var\s*([_\w\$]+)(.*)$/m;
const scopeFunc = /^\s*function\s*([_\w\$]+)/;
var self = this, matches;
// 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;
};
// 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, self) {
Eif (e && e.name === 'SyntaxError') {
var message = e.message;
if (message === 'Unterminated template literal' ||
message === 'Missing } in template expression') {
self._inTemplateLiteral = true;
return true;
}
return /^(Unexpected end of input|Unexpected token :)/.test(message);
}
return false;
}
function Recoverable(err) {
this.err = err;
}
inherits(Recoverable, SyntaxError);
}());
|