diff --git a/index.js b/index.js new file mode 100644 index 0000000..8471a15 --- /dev/null +++ b/index.js @@ -0,0 +1,60 @@ +'use strict'; + +const parseArgs = ( + argv = process.argv.slice(require.main ? 2 : 1), + options = {} +) => { + if (typeof options !== 'object' || options === null) { + throw new Error('Whoops!') + } + + let result = { + args: {}, + values: {}, + positionals: [] + } + + let pos = 0 + while (pos < argv.length) { + let arg = argv[pos] + + if (arg.startsWith('-')) { + // Everything after a bare '--' is considered a positional argument + // and is returned verbatim + if (arg === '--') { + result.positionals.push(...argv.slice(++pos)) + + return result + } + // look for shortcodes: -fXzy + else if (arg.charAt(1) !== '-') { + throw new Error('What are we doing with shortcodes!?!') + } + + // Any number of leading dashes are allowed + // remove all leading dashes + arg = arg.replace(/^-+/, '') + + if (arg.includes('=')) { + const argParts = arg.split('=') + + result.args[argParts[0]] = true + if (options.withValue) { + result.values[argParts[0]] = argParts[1] + } + } + else { + result.args[arg] = true + + } + } + + pos++ + } + + return result +} + +module.exports = { + parseArgs +} diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..ed35144 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,597 @@ +{ + "name": "@pkgjs/parseargs", + "version": "0.0.1", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "array-filter": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/array-filter/-/array-filter-1.0.0.tgz", + "integrity": "sha1-uveeYubvTCpMC4MSMtr/7CUfnYM=", + "dev": true + }, + "available-typed-arrays": { + "version": "1.0.2", + "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.2.tgz", + "integrity": "sha512-XWX3OX8Onv97LMk/ftVyBibpGwY5a8SmuxZPzeOxqmuEqUCOM9ZE+uIaD1VNJ5QnvU2UQusvmKbuM1FR8QWGfQ==", + "dev": true, + "requires": { + 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a/package.json +++ b/package.json @@ -4,7 +4,7 @@ "description": "Polyfill of future proposal for `util.parseArgs()`", "main": "index.js", "scripts": { - "test": "echo \"Error: no test specified\" && exit 1" + "test": "node test/index.js" }, "repository": { "type": "git", @@ -16,5 +16,8 @@ "bugs": { "url": "https://github.com/pkgjs/parseargs/issues" }, - "homepage": "https://github.com/pkgjs/parseargs#readme" + "homepage": "https://github.com/pkgjs/parseargs#readme", + "devDependencies": { + "tape": "^5.2.2" + } } diff --git a/test/index.js b/test/index.js new file mode 100644 index 0000000..31000c1 --- /dev/null +++ b/test/index.js @@ -0,0 +1,36 @@ +'use strict'; + +const test = require('tape') +const {parseArgs} = require('../index.js') + +test('Everything after a bare `--` is considered a positional argument', function (t) { + const passedArgs = ['--', 'barepositionals', 'mopositionals'] + const expected = { args: {}, values: {}, positionals: ['barepositionals', 'mopositionals'] } + const args = parseArgs(passedArgs) + + t.deepEqual(args, expected, 'testing bare positionals') + + t.end() +}) + +test('args are true', function (t) { + const passedArgs = ['--foo', '--bar'] + const expected = { args: { foo: true, bar: true}, values: {}, positionals: [] } + const args = parseArgs(passedArgs) + + t.deepEqual(args, expected, 'args are true') + + t.end() +}) + +test('args equals are passed "withValue"', function (t) { + const passedArgs = ['--so=wat'] + const passedOptions = { withValue: true } + const expected = { args: { so: true}, values: { so: "wat"}, positionals: [] } + const args = parseArgs(passedArgs, passedOptions) + + t.deepEqual(args, expected, 'arg value is passed') + + t.end() +}) +