diff options
Diffstat (limited to 'node_modules/yargs/build/lib/argsert.js')
-rw-r--r-- | node_modules/yargs/build/lib/argsert.js | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/node_modules/yargs/build/lib/argsert.js b/node_modules/yargs/build/lib/argsert.js new file mode 100644 index 0000000..be5b3aa --- /dev/null +++ b/node_modules/yargs/build/lib/argsert.js @@ -0,0 +1,62 @@ +import { YError } from './yerror.js'; +import { parseCommand } from './parse-command.js'; +const positionName = ['first', 'second', 'third', 'fourth', 'fifth', 'sixth']; +export function argsert(arg1, arg2, arg3) { + function parseArgs() { + return typeof arg1 === 'object' + ? [{ demanded: [], optional: [] }, arg1, arg2] + : [ + parseCommand(`cmd ${arg1}`), + arg2, + arg3, + ]; + } + try { + let position = 0; + const [parsed, callerArguments, _length] = parseArgs(); + const args = [].slice.call(callerArguments); + while (args.length && args[args.length - 1] === undefined) + args.pop(); + const length = _length || args.length; + if (length < parsed.demanded.length) { + throw new YError(`Not enough arguments provided. Expected ${parsed.demanded.length} but received ${args.length}.`); + } + const totalCommands = parsed.demanded.length + parsed.optional.length; + if (length > totalCommands) { + throw new YError(`Too many arguments provided. Expected max ${totalCommands} but received ${length}.`); + } + parsed.demanded.forEach(demanded => { + const arg = args.shift(); + const observedType = guessType(arg); + const matchingTypes = demanded.cmd.filter(type => type === observedType || type === '*'); + if (matchingTypes.length === 0) + argumentTypeError(observedType, demanded.cmd, position); + position += 1; + }); + parsed.optional.forEach(optional => { + if (args.length === 0) + return; + const arg = args.shift(); + const observedType = guessType(arg); + const matchingTypes = optional.cmd.filter(type => type === observedType || type === '*'); + if (matchingTypes.length === 0) + argumentTypeError(observedType, optional.cmd, position); + position += 1; + }); + } + catch (err) { + console.warn(err.stack); + } +} +function guessType(arg) { + if (Array.isArray(arg)) { + return 'array'; + } + else if (arg === null) { + return 'null'; + } + return typeof arg; +} +function argumentTypeError(observedType, allowedTypes, position) { + throw new YError(`Invalid ${positionName[position] || 'manyith'} argument. Expected ${allowedTypes.join(' or ')} but received ${observedType}.`); +} |