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"use strict"; // translate the various posix character classes into unicode properties // this works across all unicode locales Object.defineProperty(exports, "__esModule", { value: true }); exports.parseClass = void 0; // { <posix class>: [<translation>, /u flag required, negated] const posixClasses = { '[:alnum:]': ['\\p{L}\\p{Nl}\\p{Nd}', true], '[:alpha:]': ['\\p{L}\\p{Nl}', true], '[:ascii:]': ['\\x' + '00-\\x' + '7f', false], '[:blank:]': ['\\p{Zs}\\t', true], '[:cntrl:]': ['\\p{Cc}', true], '[:digit:]': ['\\p{Nd}', true], '[:graph:]': ['\\p{Z}\\p{C}', true, true], '[:lower:]': ['\\p{Ll}', true], '[:print:]': ['\\p{C}', true], '[:punct:]': ['\\p{P}', true], '[:space:]': ['\\p{Z}\\t\\r\\n\\v\\f', true], '[:upper:]': ['\\p{Lu}', true], '[:word:]': ['\\p{L}\\p{Nl}\\p{Nd}\\p{Pc}', true], '[:xdigit:]': ['A-Fa-f0-9', false], }; // only need to escape a few things inside of brace expressions // escapes: [ \ ] - const braceEscape = (s) => s.replace(/[[\]\\-]/g, '\\$&'); // escape all regexp magic characters const regexpEscape = (s) => s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&'); // everything has already been escaped, we just have to join const rangesToString = (ranges) => ranges.join(''); // takes a glob string at a posix brace expression, and returns // an equivalent regular expression source, and boolean indicating // whether the /u flag needs to be applied, and the number of chars // consumed to parse the character class. // This also removes out of order ranges, and returns ($.) if the // entire class just no good. const parseClass = (glob, position) => { const pos = position; /* c8 ignore start */ if (glob.charAt(pos) !== '[') { throw new Error('not in a brace expression'); } /* c8 ignore stop */ const ranges = []; const negs = []; let i = pos + 1; let sawStart = false; let uflag = false; let escaping = false; let negate = false; let endPos = pos; let rangeStart = ''; WHILE: while (i < glob.length) { const c = glob.charAt(i); if ((c === '!' || c === '^') && i === pos + 1) { negate = true; i++; continue; } if (c === ']' && sawStart && !escaping) { endPos = i + 1; break; } sawStart = true; if (c === '\\') { if (!escaping) { escaping = true; i++; continue; } // escaped \ char, fall through and treat like normal char } if (c === '[' && !escaping) { // either a posix class, a collation equivalent, or just a [ for (const [cls, [unip, u, neg]] of Object.entries(posixClasses)) { if (glob.startsWith(cls, i)) { // invalid, [a-[] is fine, but not [a-[:alpha]] if (rangeStart) { return ['$.', false, glob.length - pos, true]; } i += cls.length; if (neg) negs.push(unip); else ranges.push(unip); uflag = uflag || u; continue WHILE; } } } // now it's just a normal character, effectively escaping = false; if (rangeStart) { // throw this range away if it's not valid, but others // can still match. if (c > rangeStart) { ranges.push(braceEscape(rangeStart) + '-' + braceEscape(c)); } else if (c === rangeStart) { ranges.push(braceEscape(c)); } rangeStart = ''; i++; continue; } // now might be the start of a range. // can be either c-d or c-] or c<more...>] or c] at this point if (glob.startsWith('-]', i + 1)) { ranges.push(braceEscape(c + '-')); i += 2; continue; } if (glob.startsWith('-', i + 1)) { rangeStart = c; i += 2; continue; } // not the start of a range, just a single character ranges.push(braceEscape(c)); i++; } if (endPos < i) { // didn't see the end of the class, not a valid class, // but might still be valid as a literal match. return ['', false, 0, false]; } // if we got no ranges and no negates, then we have a range that // cannot possibly match anything, and that poisons the whole glob if (!ranges.length && !negs.length) { return ['$.', false, glob.length - pos, true]; } // if we got one positive range, and it's a single character, then that's // not actually a magic pattern, it's just that one literal character. // we should not treat that as "magic", we should just return the literal // character. [_] is a perfectly valid way to escape glob magic chars. if (negs.length === 0 && ranges.length === 1 && /^\\?.$/.test(ranges[0]) && !negate) { const r = ranges[0].length === 2 ? ranges[0].slice(-1) : ranges[0]; return [regexpEscape(r), false, endPos - pos, false]; } const sranges = '[' + (negate ? '^' : '') + rangesToString(ranges) + ']'; const snegs = '[' + (negate ? '' : '^') + rangesToString(negs) + ']'; const comb = ranges.length && negs.length ? '(' + sranges + '|' + snegs + ')' : ranges.length ? sranges : snegs; return [comb, uflag, endPos - pos, true]; }; exports.parseClass = parseClass; //# sourceMappingURL=brace-expressions.js.map