source: trip-planner-front/node_modules/yargs/build/lib/argsert.js@ eed0bf8

Last change on this file since eed0bf8 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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[6a3a178]1import { YError } from './yerror.js';
2import { parseCommand } from './parse-command.js';
3const positionName = ['first', 'second', 'third', 'fourth', 'fifth', 'sixth'];
4export function argsert(arg1, arg2, arg3) {
5 function parseArgs() {
6 return typeof arg1 === 'object'
7 ? [{ demanded: [], optional: [] }, arg1, arg2]
8 : [
9 parseCommand(`cmd ${arg1}`),
10 arg2,
11 arg3,
12 ];
13 }
14 try {
15 let position = 0;
16 const [parsed, callerArguments, _length] = parseArgs();
17 const args = [].slice.call(callerArguments);
18 while (args.length && args[args.length - 1] === undefined)
19 args.pop();
20 const length = _length || args.length;
21 if (length < parsed.demanded.length) {
22 throw new YError(`Not enough arguments provided. Expected ${parsed.demanded.length} but received ${args.length}.`);
23 }
24 const totalCommands = parsed.demanded.length + parsed.optional.length;
25 if (length > totalCommands) {
26 throw new YError(`Too many arguments provided. Expected max ${totalCommands} but received ${length}.`);
27 }
28 parsed.demanded.forEach(demanded => {
29 const arg = args.shift();
30 const observedType = guessType(arg);
31 const matchingTypes = demanded.cmd.filter(type => type === observedType || type === '*');
32 if (matchingTypes.length === 0)
33 argumentTypeError(observedType, demanded.cmd, position);
34 position += 1;
35 });
36 parsed.optional.forEach(optional => {
37 if (args.length === 0)
38 return;
39 const arg = args.shift();
40 const observedType = guessType(arg);
41 const matchingTypes = optional.cmd.filter(type => type === observedType || type === '*');
42 if (matchingTypes.length === 0)
43 argumentTypeError(observedType, optional.cmd, position);
44 position += 1;
45 });
46 }
47 catch (err) {
48 console.warn(err.stack);
49 }
50}
51function guessType(arg) {
52 if (Array.isArray(arg)) {
53 return 'array';
54 }
55 else if (arg === null) {
56 return 'null';
57 }
58 return typeof arg;
59}
60function argumentTypeError(observedType, allowedTypes, position) {
61 throw new YError(`Invalid ${positionName[position] || 'manyith'} argument. Expected ${allowedTypes.join(' or ')} but received ${observedType}.`);
62}
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