Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 1 | module.exports = function (args, opts) { |
| 2 | if (!opts) opts = {}; |
| 3 | |
| 4 | var flags = { bools : {}, strings : {}, unknownFn: null }; |
| 5 | |
| 6 | if (typeof opts['unknown'] === 'function') { |
| 7 | flags.unknownFn = opts['unknown']; |
| 8 | } |
| 9 | |
| 10 | if (typeof opts['boolean'] === 'boolean' && opts['boolean']) { |
| 11 | flags.allBools = true; |
| 12 | } else { |
| 13 | [].concat(opts['boolean']).filter(Boolean).forEach(function (key) { |
| 14 | flags.bools[key] = true; |
| 15 | }); |
| 16 | } |
| 17 | |
| 18 | var aliases = {}; |
| 19 | Object.keys(opts.alias || {}).forEach(function (key) { |
| 20 | aliases[key] = [].concat(opts.alias[key]); |
| 21 | aliases[key].forEach(function (x) { |
| 22 | aliases[x] = [key].concat(aliases[key].filter(function (y) { |
| 23 | return x !== y; |
| 24 | })); |
| 25 | }); |
| 26 | }); |
| 27 | |
| 28 | [].concat(opts.string).filter(Boolean).forEach(function (key) { |
| 29 | flags.strings[key] = true; |
| 30 | if (aliases[key]) { |
| 31 | flags.strings[aliases[key]] = true; |
| 32 | } |
| 33 | }); |
| 34 | |
| 35 | var defaults = opts['default'] || {}; |
| 36 | |
| 37 | var argv = { _ : [] }; |
| 38 | Object.keys(flags.bools).forEach(function (key) { |
| 39 | setArg(key, defaults[key] === undefined ? false : defaults[key]); |
| 40 | }); |
| 41 | |
| 42 | var notFlags = []; |
| 43 | |
| 44 | if (args.indexOf('--') !== -1) { |
| 45 | notFlags = args.slice(args.indexOf('--')+1); |
| 46 | args = args.slice(0, args.indexOf('--')); |
| 47 | } |
| 48 | |
| 49 | function argDefined(key, arg) { |
| 50 | return (flags.allBools && /^--[^=]+$/.test(arg)) || |
| 51 | flags.strings[key] || flags.bools[key] || aliases[key]; |
| 52 | } |
| 53 | |
| 54 | function setArg (key, val, arg) { |
| 55 | if (arg && flags.unknownFn && !argDefined(key, arg)) { |
| 56 | if (flags.unknownFn(arg) === false) return; |
| 57 | } |
| 58 | |
| 59 | var value = !flags.strings[key] && isNumber(val) |
| 60 | ? Number(val) : val |
| 61 | ; |
| 62 | setKey(argv, key.split('.'), value); |
| 63 | |
| 64 | (aliases[key] || []).forEach(function (x) { |
| 65 | setKey(argv, x.split('.'), value); |
| 66 | }); |
| 67 | } |
| 68 | |
| 69 | function setKey (obj, keys, value) { |
| 70 | var o = obj; |
Tim van der Lippe | e8c1000 | 2020-05-11 12:23:03 | [diff] [blame] | 71 | for (var i = 0; i < keys.length-1; i++) { |
| 72 | var key = keys[i]; |
Brandon Walderman | 110d592 | 2022-04-19 17:35:07 | [diff] [blame] | 73 | if (isConstructorOrProto(o, key)) return; |
Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 74 | if (o[key] === undefined) o[key] = {}; |
Tim van der Lippe | e8c1000 | 2020-05-11 12:23:03 | [diff] [blame] | 75 | if (o[key] === Object.prototype || o[key] === Number.prototype |
| 76 | || o[key] === String.prototype) o[key] = {}; |
| 77 | if (o[key] === Array.prototype) o[key] = []; |
Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 78 | o = o[key]; |
Tim van der Lippe | e8c1000 | 2020-05-11 12:23:03 | [diff] [blame] | 79 | } |
Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 80 | |
| 81 | var key = keys[keys.length - 1]; |
Brandon Walderman | 110d592 | 2022-04-19 17:35:07 | [diff] [blame] | 82 | if (isConstructorOrProto(o, key)) return; |
Tim van der Lippe | e8c1000 | 2020-05-11 12:23:03 | [diff] [blame] | 83 | if (o === Object.prototype || o === Number.prototype |
| 84 | || o === String.prototype) o = {}; |
| 85 | if (o === Array.prototype) o = []; |
Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 86 | if (o[key] === undefined || flags.bools[key] || typeof o[key] === 'boolean') { |
| 87 | o[key] = value; |
| 88 | } |
| 89 | else if (Array.isArray(o[key])) { |
| 90 | o[key].push(value); |
| 91 | } |
| 92 | else { |
| 93 | o[key] = [ o[key], value ]; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | function aliasIsBoolean(key) { |
| 98 | return aliases[key].some(function (x) { |
| 99 | return flags.bools[x]; |
| 100 | }); |
| 101 | } |
| 102 | |
| 103 | for (var i = 0; i < args.length; i++) { |
| 104 | var arg = args[i]; |
| 105 | |
| 106 | if (/^--.+=/.test(arg)) { |
| 107 | // Using [\s\S] instead of . because js doesn't support the |
| 108 | // 'dotall' regex modifier. See: |
| 109 | // http://stackoverflow.com/a/1068308/13216 |
| 110 | var m = arg.match(/^--([^=]+)=([\s\S]*)$/); |
| 111 | var key = m[1]; |
| 112 | var value = m[2]; |
| 113 | if (flags.bools[key]) { |
| 114 | value = value !== 'false'; |
| 115 | } |
| 116 | setArg(key, value, arg); |
| 117 | } |
| 118 | else if (/^--no-.+/.test(arg)) { |
| 119 | var key = arg.match(/^--no-(.+)/)[1]; |
| 120 | setArg(key, false, arg); |
| 121 | } |
| 122 | else if (/^--.+/.test(arg)) { |
| 123 | var key = arg.match(/^--(.+)/)[1]; |
| 124 | var next = args[i + 1]; |
| 125 | if (next !== undefined && !/^-/.test(next) |
| 126 | && !flags.bools[key] |
| 127 | && !flags.allBools |
| 128 | && (aliases[key] ? !aliasIsBoolean(key) : true)) { |
| 129 | setArg(key, next, arg); |
| 130 | i++; |
| 131 | } |
| 132 | else if (/^(true|false)$/.test(next)) { |
| 133 | setArg(key, next === 'true', arg); |
| 134 | i++; |
| 135 | } |
| 136 | else { |
| 137 | setArg(key, flags.strings[key] ? '' : true, arg); |
| 138 | } |
| 139 | } |
| 140 | else if (/^-[^-]+/.test(arg)) { |
| 141 | var letters = arg.slice(1,-1).split(''); |
| 142 | |
| 143 | var broken = false; |
| 144 | for (var j = 0; j < letters.length; j++) { |
| 145 | var next = arg.slice(j+2); |
| 146 | |
| 147 | if (next === '-') { |
| 148 | setArg(letters[j], next, arg) |
| 149 | continue; |
| 150 | } |
| 151 | |
| 152 | if (/[A-Za-z]/.test(letters[j]) && /=/.test(next)) { |
| 153 | setArg(letters[j], next.split('=')[1], arg); |
| 154 | broken = true; |
| 155 | break; |
| 156 | } |
| 157 | |
| 158 | if (/[A-Za-z]/.test(letters[j]) |
| 159 | && /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) { |
| 160 | setArg(letters[j], next, arg); |
| 161 | broken = true; |
| 162 | break; |
| 163 | } |
| 164 | |
| 165 | if (letters[j+1] && letters[j+1].match(/\W/)) { |
| 166 | setArg(letters[j], arg.slice(j+2), arg); |
| 167 | broken = true; |
| 168 | break; |
| 169 | } |
| 170 | else { |
| 171 | setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | var key = arg.slice(-1)[0]; |
| 176 | if (!broken && key !== '-') { |
| 177 | if (args[i+1] && !/^(-|--)[^-]/.test(args[i+1]) |
| 178 | && !flags.bools[key] |
| 179 | && (aliases[key] ? !aliasIsBoolean(key) : true)) { |
| 180 | setArg(key, args[i+1], arg); |
| 181 | i++; |
| 182 | } |
Tim van der Lippe | e8c1000 | 2020-05-11 12:23:03 | [diff] [blame] | 183 | else if (args[i+1] && /^(true|false)$/.test(args[i+1])) { |
Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 184 | setArg(key, args[i+1] === 'true', arg); |
| 185 | i++; |
| 186 | } |
| 187 | else { |
| 188 | setArg(key, flags.strings[key] ? '' : true, arg); |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | else { |
| 193 | if (!flags.unknownFn || flags.unknownFn(arg) !== false) { |
| 194 | argv._.push( |
| 195 | flags.strings['_'] || !isNumber(arg) ? arg : Number(arg) |
| 196 | ); |
| 197 | } |
| 198 | if (opts.stopEarly) { |
| 199 | argv._.push.apply(argv._, args.slice(i + 1)); |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | Object.keys(defaults).forEach(function (key) { |
| 206 | if (!hasKey(argv, key.split('.'))) { |
| 207 | setKey(argv, key.split('.'), defaults[key]); |
| 208 | |
| 209 | (aliases[key] || []).forEach(function (x) { |
| 210 | setKey(argv, x.split('.'), defaults[key]); |
| 211 | }); |
| 212 | } |
| 213 | }); |
| 214 | |
| 215 | if (opts['--']) { |
| 216 | argv['--'] = new Array(); |
| 217 | notFlags.forEach(function(key) { |
| 218 | argv['--'].push(key); |
| 219 | }); |
| 220 | } |
| 221 | else { |
| 222 | notFlags.forEach(function(key) { |
| 223 | argv._.push(key); |
| 224 | }); |
| 225 | } |
| 226 | |
| 227 | return argv; |
| 228 | }; |
| 229 | |
| 230 | function hasKey (obj, keys) { |
| 231 | var o = obj; |
| 232 | keys.slice(0,-1).forEach(function (key) { |
| 233 | o = (o[key] || {}); |
| 234 | }); |
| 235 | |
| 236 | var key = keys[keys.length - 1]; |
| 237 | return key in o; |
| 238 | } |
| 239 | |
| 240 | function isNumber (x) { |
| 241 | if (typeof x === 'number') return true; |
| 242 | if (/^0x[0-9a-f]+$/i.test(x)) return true; |
| 243 | return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x); |
| 244 | } |
| 245 | |
Brandon Walderman | 110d592 | 2022-04-19 17:35:07 | [diff] [blame] | 246 | |
| 247 | function isConstructorOrProto (obj, key) { |
| 248 | return key === 'constructor' && typeof obj[key] === 'function' || key === '__proto__'; |
| 249 | } |