120 lines
2.8 KiB
JavaScript
120 lines
2.8 KiB
JavaScript
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function toArr(any) {
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return any == null ? [] : Array.isArray(any) ? any : [any];
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}
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function toVal(out, key, val, opts) {
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var x, old=out[key], nxt=(
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!!~opts.string.indexOf(key) ? (val == null || val === true ? '' : String(val))
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: typeof val === 'boolean' ? val
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: !!~opts.boolean.indexOf(key) ? (val === 'false' ? false : val === 'true' || (out._.push((x = +val,x * 0 === 0) ? x : val),!!val))
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: (x = +val,x * 0 === 0) ? x : val
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);
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out[key] = old == null ? nxt : (Array.isArray(old) ? old.concat(nxt) : [old, nxt]);
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}
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module.exports = function (args, opts) {
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args = args || [];
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opts = opts || {};
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var k, arr, arg, name, val, out={ _:[] };
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var i=0, j=0, idx=0, len=args.length;
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const alibi = opts.alias !== void 0;
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const strict = opts.unknown !== void 0;
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const defaults = opts.default !== void 0;
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opts.alias = opts.alias || {};
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opts.string = toArr(opts.string);
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opts.boolean = toArr(opts.boolean);
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if (alibi) {
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for (k in opts.alias) {
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arr = opts.alias[k] = toArr(opts.alias[k]);
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for (i=0; i < arr.length; i++) {
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(opts.alias[arr[i]] = arr.concat(k)).splice(i, 1);
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}
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}
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}
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for (i=opts.boolean.length; i-- > 0;) {
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arr = opts.alias[opts.boolean[i]] || [];
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for (j=arr.length; j-- > 0;) opts.boolean.push(arr[j]);
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}
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for (i=opts.string.length; i-- > 0;) {
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arr = opts.alias[opts.string[i]] || [];
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for (j=arr.length; j-- > 0;) opts.string.push(arr[j]);
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}
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if (defaults) {
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for (k in opts.default) {
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name = typeof opts.default[k];
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arr = opts.alias[k] = opts.alias[k] || [];
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if (opts[name] !== void 0) {
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opts[name].push(k);
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for (i=0; i < arr.length; i++) {
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opts[name].push(arr[i]);
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}
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}
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}
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}
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const keys = strict ? Object.keys(opts.alias) : [];
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for (i=0; i < len; i++) {
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arg = args[i];
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if (arg === '--') {
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out._ = out._.concat(args.slice(++i));
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break;
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}
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for (j=0; j < arg.length; j++) {
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if (arg.charCodeAt(j) !== 45) break; // "-"
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}
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if (j === 0) {
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out._.push(arg);
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} else if (arg.substring(j, j + 3) === 'no-') {
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name = arg.substring(j + 3);
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if (strict && !~keys.indexOf(name)) {
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return opts.unknown(arg);
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}
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out[name] = false;
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} else {
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for (idx=j+1; idx < arg.length; idx++) {
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if (arg.charCodeAt(idx) === 61) break; // "="
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}
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name = arg.substring(j, idx);
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val = arg.substring(++idx) || (i+1 === len || (''+args[i+1]).charCodeAt(0) === 45 || args[++i]);
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arr = (j === 2 ? [name] : name);
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for (idx=0; idx < arr.length; idx++) {
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name = arr[idx];
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if (strict && !~keys.indexOf(name)) return opts.unknown('-'.repeat(j) + name);
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toVal(out, name, (idx + 1 < arr.length) || val, opts);
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}
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}
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}
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if (defaults) {
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for (k in opts.default) {
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if (out[k] === void 0) {
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out[k] = opts.default[k];
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}
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}
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}
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if (alibi) {
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for (k in out) {
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arr = opts.alias[k] || [];
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while (arr.length > 0) {
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out[arr.shift()] = out[k];
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}
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}
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}
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return out;
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}
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