1 line
39 KiB
Plaintext
1 line
39 KiB
Plaintext
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[] : this.#root.#negs\n if (type === '!' && !this.#root.#filledNegs) this.#negs.push(this)\n this.#parentIndex = this.#parent ? this.#parent.#parts.length : 0\n }\n\n get hasMagic(): boolean | undefined {\n /* c8 ignore start */\n if (this.#hasMagic !== undefined) return this.#hasMagic\n /* c8 ignore stop */\n for (const p of this.#parts) {\n if (typeof p === 'string') continue\n if (p.type || p.hasMagic) return (this.#hasMagic = true)\n }\n // note: will be undefined until we generate the regexp src and find out\n return this.#hasMagic\n }\n\n // reconstructs the pattern\n toString(): string {\n if (this.#toString !== undefined) return this.#toString\n if (!this.type) {\n return (this.#toString = this.#parts.map(p => String(p)).join(''))\n } else {\n return (this.#toString =\n this.type + '(' + this.#parts.map(p => String(p)).join('|') + ')')\n }\n }\n\n #fillNegs() {\n /* c8 ignore start */\n if (this !== this.#root) throw new Error('should only call on root')\n if (this.#filledNegs) return this\n /* c8 ignore stop */\n\n // call toString() once to fill this out\n this.toString()\n this.#filledNegs = true\n let n: AST | undefined\n while ((n = this.#negs.pop())) {\n if (n.type !== '!') continue\n // walk up the tree, appending everthing that comes AFTER parentIndex\n let p: AST | undefined = n\n let pp = p.#parent\n while (pp) {\n for (\n let i = p.#parentIndex + 1;\n !pp.type && i < pp.#parts.length;\n i++\n ) {\n for (const part of n.#parts) {\n /* c8 ignore start */\n if (typeof part === 'string') {\n throw new Error('string part in extglob AST??')\n }\n /* c8 ignore stop */\n part.copyIn(pp.#parts[i])\n }\n }\n p = pp\n pp = p.#parent\n }\n }\n return this\n }\n\n push(...parts: (string | AST)[]) {\n for (const p of parts) {\n if (p === '') continue\n /* c8 ignore start */\n if (typeof p !== 'string' && !(p instanceof AST && p.#parent === this)) {\n throw new Error('invalid part: ' + p)\n }\n /* c8 ignore stop */\n this.#parts.push(p)\n }\n }\n\n toJSON() {\n const ret: any[] =\n this.type === null\n ? this.#parts.slice().map(p => (typeof p === 'string' ? p : p.toJSON()))\n : [this.type, ...this.#parts.map(p => (p as AST).toJSON())]\n if (this.isStart() && !this.type) ret.unshift([])\n if (\n this.isEnd() &&\n (this === this.#root ||\n (this.#root.#filledNegs && this.#parent?.type === '!'))\n ) {\n ret.push({})\n }\n return ret\n }\n\n isStart(): boolean {\n if (this.#root === this) return true\n // if (this.type) return !!this.#parent?.isStart()\n if (!this.#parent?.isStart()) return false\n if (this.#parentIndex === 0) return true\n // if everything AHEAD of this is a negation, then it's still the \"start\"\n const p = this.#parent\n for (let i = 0; i < this.#parentIndex; i++) {\n const pp = p.#parts[i]\n if (!(pp instanceof AST && pp.type === '!')) {\n return false\n }\n }\n return true\n }\n\n isEnd(): boolean {\n if (this.#root === this) return true\n if (this.#parent?.type === '!') return true\n if (!this.#parent?.isEnd()) return false\n if (!this.type) return this.#parent?.isEnd()\n // if not root, it'll always have a parent\n /* c8 ignore start */\n const pl = this.#parent ? this.#parent.#parts.length : 0\n /* c8 ignore stop */\n return this.#parentIndex === pl - 1\n }\n\n copyIn(part: AST | string) {\n if (typeof part === 'string') this.push(part)\n else this.push(part.clone(this))\n }\n\n clone(parent: AST) {\n const c = new AST(this.type, parent)\n for (const p of this.#parts) {\n c.copyIn(p)\n }\n return c\n }\n\n static #parseAST(\n str: string,\n ast: AST,\n pos: number,\n opt: MinimatchOptions\n ): number {\n let escaping = false\n let inBrace = false\n let braceStart = -1\n let braceNeg = false\n if (ast.type === null) {\n // outside of a extglob, append until we find a start\n let i = pos\n let acc = ''\n while (i < str.length) {\n const c = str.charAt(i++)\n // still accumulate escapes at this point, but we do ignore\n // starts that are escaped\n if (escaping || c === '\\\\') {\n escaping = !escaping\n acc += c\n continue\n }\n\n if (inBrace) {\n if (i === braceStart + 1) {\n if (c === '^' || c === '!') {\n braceNeg = true\n }\n } else if (c === ']' && !(i === braceStart + 2 && braceNeg)) {\n inBrace = false\n }\n acc += c\n continue\n } else if (c === '[') {\n inBrace = true\n braceStart = i\n braceNeg = false\n acc += c\n continue\n }\n\n if (!opt.noext && isExtglobType(c) && str.charAt(i) === '(') {\n ast.push(acc)\n acc = ''\n const ext = new AST(c, ast)\n i = AST.#parseAST(str, ext, i, opt)\n ast.push(ext)\n continue\n }\n acc += c\n }\n ast.push(acc)\n return i\n }\n\n // some kind of extglob, pos is at the (\n // find the next | or )\n let i = pos + 1\n let part = new AST(null, ast)\n const parts: AST[] = []\n let acc = ''\n while (i < str.length) {\n const c = str.charAt(i++)\n // still accumulate escapes at this point, but we do ignore\n // starts that are escaped\n if (escaping || c === '\\\\') {\n escaping = !escaping\n acc += c\n continue\n }\n\n if (inBrace) {\n if (i === braceStart + 1) {\n if (c === '^' || c === '!') {\n braceNeg = true\n }\n } else if (c === ']' && !(i === braceStart + 2 && braceNeg)) {\n inBrace = false\n }\n acc += c\n continue\n } else if (c === '[') {\n inBrace = true\n braceStart = i\n braceNeg = false\n acc += c\n continue\n }\n\n if (isExtglobType(c) && str.charAt(i) === '(') {\n part.push(acc)\n acc = ''\n const ext = new AST(c, part)\n part.push(ext)\n i = AST.#parseAST(str, ext, i, opt)\n continue\n }\n if (c === '|') {\n part.push(acc)\n acc = ''\n parts.push(part)\n part = new AST(null, ast)\n continue\n }\n if (c === ')') {\n if (acc === '' && ast.#parts.length === 0) {\n ast.#emptyExt = true\n }\n part.push(acc)\n acc = ''\n ast.push(...parts, part)\n return i\n }\n acc += c\n }\n\n // unfinished extglob\n // if we got here, it was a malformed extglob! not an extglob, but\n // maybe something else in there.\n ast.type = null\n ast.#hasMagic = undefined\n ast.#parts = [str.substring(pos - 1)]\n return i\n }\n\n static fromGlob(pattern: string, options: MinimatchOptions = {}) {\n const ast = new AST(null, undefined, options)\n AST.#parseAST(pattern, ast, 0, options)\n return ast\n }\n\n // returns the regular expression if there's magic, or the unescaped\n // string if not.\n toMMPattern(): MMRegExp | string {\n // should only be called on root\n /* c8 ignore start */\n if (this !== this.#root) return this.#root.toMMPattern()\n /* c8 ignore stop */\n const glob = this.toString()\n const [re, body, hasMagic, uflag] = this.toRegExpSource()\n // if we're in nocase mode, and not nocaseMagicOnly, then we do\n // still need a regular expression if we have to case-insensitively\n // match capital/lowercase characters.\n const anyMagic =\n hasMagic ||\n this.#hasMagic ||\n (this.#options.nocase &&\n !this.#options.nocaseMagicOnly &&\n glob.toUpperCase() !== glob.toLowerCase())\n if (!anyMagic) {\n return body\n }\n\n const flags = (this.#options.nocase ? 'i' : '') + (uflag ? 'u' : '')\n return Object.assign(new RegExp(`^${re}$`, flags), {\n _src: re,\n _glob: glob,\n })\n }\n\n // returns the string match, the regexp source, whether there's magic\n // in the regexp (so a regular expression is required) and whether or\n // not the uflag is needed for the regular expression (for posix classes)\n // TODO: instead of injecting the start/end at this point, just return\n // the BODY of the regexp, along with the start/end portions suitable\n // for binding the start/end in either a joined full-path makeRe context\n // (where we bind to (^|/), or a standalone matchPart context (where\n // we bind to ^, and not /). Otherwise slashes get duped!\n //\n // In part-matching mode, the start is:\n // - if not isStart: nothing\n // - if traversal possible, but not allowed: ^(?!\\.\\.?$)\n // - if dots allowed or not possible: ^\n // - if dots possible and not allowed: ^(?!\\.)\n // end is:\n // - if not isEnd(): nothing\n // - else: $\n //\n // In full-path matching mode, we put the slash at the START of the\n // pattern, so start is:\n // - if first pattern: same as part-matching mode\n // - if not isStart(): nothing\n // - if traversal possible, but not allowed: /(?!\\.\\.?(?:$|/))\n // - if dots allowed or not possible: /\n // - if dots possible and not allowed: /(?!\\.)\n // end is:\n // - if last pattern, same as part-matching mode\n // - else nothing\n //\n // Always put the (?:$|/) on negated tails, though, because that has to be\n // there to bind the end of the negated pattern portion, and it's easier to\n // just stick it in now rather than try to inject it later in the middle of\n // the pattern.\n //\n // We can just always return the same end, and leave it up to the caller\n // to know whether it's going to be used joined or in parts.\n // And, if the start is adjusted slightly, can do the same there:\n // - if not isStart: nothing\n // - if traversal possible, but not allowed: (?:/|^)(?!\\.\\.?$)\n // - if dots allowed or not possible: (?:/|^)\n // - if dots possible and not allowed: (?:/|^)(?!\\.)\n //\n // But it's better to have a simpler binding without a conditional, for\n // performance, so probably better to return both start options.\n //\n // Then the caller just ignores the end if it's not the first pattern,\n // and the start always gets applied.\n //\n // But that's always going to be $ if it's the ending pattern, or nothing,\n // so the caller can just attach $ at the end of the pattern when building.\n //\n // So the todo is:\n // - better detect what kind of start is needed\n // - return both flavors of starting pattern\n // - attach $ at the end of the pattern when creating the actual RegExp\n //\n // Ah, but wait, no, that all only applies to the root when the first pattern\n // is not an extglob. If the first pattern IS an extglob, then we need all\n // that dot prevention biz to live in the extglob portions, because eg\n // +(*|.x*) can match .xy but not .yx.\n //\n // So, return the two flavors if it's #root and the first child is not an\n // AST, otherwise leave it to the child AST to handle it, and there,\n // use the (?:^|/) style of start binding.\n //\n // Even simplified further:\n // - Since the start for a join is eg /(?!\\.) and the start for a part\n // is ^(?!\\.), we can just prepend (?!\\.) to the pattern (either root\n // or start or whatever) and prepend ^ or / at the Regexp construction.\n toRegExpSource(\n allowDot?: boolean\n ): [re: string, body: string, hasMagic: boolean, uflag: boolean] {\n const dot = allowDot ?? !!this.#options.dot\n if (this.#root === this) this.#fillNegs()\n if (!this.type) {\n const noEmpty = this.isStart() && this.isEnd()\n const src = this.#parts\n .map(p => {\n const [re, _, hasMagic, uflag] =\n typeof p === 'string'\n ? AST.#parseGlob(p, this.#hasMagic, noEmpty)\n : p.toRegExpSource(allowDot)\n this.#hasMagic = this.#hasMagic || hasMagic\n this.#uflag = this.#uflag || uflag\n return re\n })\n .join('')\n\n let start = ''\n if (this.isStart()) {\n if (typeof this.#parts[0] === 'string') {\n // this is the string that will match the start of the pattern,\n // so we need to protect against dots and such.\n\n // '.' and '..' cannot match unless the pattern is that exactly,\n // even if it starts with . or dot:true is set.\n const dotTravAllowed =\n this.#parts.length === 1 && justDots.has(this.#parts[0])\n if (!dotTravAllowed) {\n const aps = addPatternStart\n // check if we have a possibility of matching . or ..,\n // and prevent that.\n const needNoTrav =\n // dots are allowed, and the pattern starts with [ or .\n (dot && aps.has(src.charAt(0))) ||\n // the pattern starts with \\., and then [ or .\n (src.startsWith('\\\\.') && aps.has(src.charAt(2))) ||\n // the pattern starts with \\.\\., and then [ or .\n (src.startsWith('\\\\.\\\\.') && aps.has(src.charAt(4)))\n // no need to prevent dots if it can't match a dot, or if a\n // sub-pattern will be preventing it anyway.\n const needNoDot = !dot && !allowDot && aps.has(src.charAt(0))\n\n start = needNoTrav ? startNoTraversal : needNoDot ? startNoDot : ''\n }\n }\n }\n\n // append the \"end of path portion\" pattern to negation tails\n let end = ''\n if (\n this.isEnd() &&\n this.#root.#filledNegs &&\n this.#parent?.type === '!'\n ) {\n end = '(?:$|\\\\/)'\n }\n const final = start + src + end\n return [\n final,\n unescape(src),\n (this.#hasMagic = !!this.#hasMagic),\n this.#uflag,\n ]\n }\n\n // We need to calculate the body *twice* if it's a repeat pattern\n // at the start, once in nodot mode, then again in dot mode, so a\n // pattern like *(?) can match 'x.y'\n\n const repeated = this.type === '*' || this.type === '+'\n // some kind of extglob\n const start = this.type === '!' ? '(?:(?!(?:' : '(?:'\n let body = this.#partsToRegExp(dot)\n\n if (this.isStart() && this.isEnd() && !body && this.type !== '!') {\n // invalid extglob, has to at least be *something* present, if it's\n // the entire path portion.\n const s = this.toString()\n this.#parts = [s]\n this.type = null\n this.#hasMagic = undefined\n return [s, unescape(this.toString()), false, false]\n }\n\n // XXX abstract out this map method\n let bodyDotAllowed =\n !repeated || allowDot || dot || !startNoDot\n ? ''\n : this.#partsToRegExp(true)\n if (bodyDotAllowed === body) {\n bodyDotAllowed = ''\n }\n if (bodyDotAllowed) {\n body = `(?:${body})(?:${bodyDotAllowed})*?`\n }\n\n // an empty !() is exactly equivalent to a starNoEmpty\n let final = ''\n if (this.type === '!' && this.#emptyExt) {\n final = (this.isStart() && !dot ? startNoDot : '') + starNoEmpty\n } else {\n const close =\n this.type === '!'\n ? // !() must match something,but !(x) can match ''\n '))' +\n (this.isStart() && !dot && !allowDot ? startNoDot : '') +\n star +\n ')'\n : this.type === '@'\n ? ')'\n : this.type === '?'\n ? ')?'\n : this.type === '+' && bodyDotAllowed\n ? ')'\n : this.type === '*' && bodyDotAllowed\n ? `)?`\n : `)${this.type}`\n final = start + body + close\n }\n return [\n final,\n unescape(body),\n (this.#hasMagic = !!this.#hasMagic),\n this.#uflag,\n ]\n }\n\n #partsToRegExp(dot: boolean) {\n return this.#parts\n .map(p => {\n // extglob ASTs should only contain parent ASTs\n /* c8 ignore start */\n if (typeof p === 'string') {\n throw new Error('string type in extglob ast??')\n }\n /* c8 ignore stop */\n // can ignore hasMagic, because extglobs are already always magic\n const [re, _, _hasMagic, uflag] = p.toRegExpSource(dot)\n this.#uflag = this.#uflag || uflag\n return re\n })\n .filter(p => !(this.isStart() && this.isEnd()) || !!p)\n .join('|')\n }\n\n static #parseGlob(\n glob: string,\n hasMagic: boolean | undefined,\n noEmpty: boolean = false\n ): [re: string, body: string, hasMagic: boolean, uflag: boolean] {\n let escaping = false\n let re = ''\n let uflag = false\n for (let i = 0; i < glob.length; i++) {\n const c = glob.charAt(i)\n if (escaping) {\n escaping = false\n re += (reSpecials.has(c) ? '\\\\' : '') + c\n continue\n }\n if (c === '\\\\') {\n if (i === glob.length - 1) {\n re += '\\\\\\\\'\n } else {\n escaping = true\n }\n continue\n }\n if (c === '[') {\n const [src, needUflag, consumed, magic] = parseClass(glob, i)\n if (consumed) {\n re += src\n uflag = uflag || needUflag\n i += consumed - 1\n hasMagic = hasMagic || magic\n continue\n }\n }\n if (c === '*') {\n if (noEmpty && glob === '*') re += starNoEmpty\n else re += star\n hasMagic = true\n continue\n }\n if (c === '?') {\n re += qmark\n hasMagic = true\n continue\n }\n re += regExpEscape(c)\n }\n return [re, unescape(glob), !!hasMagic, uflag]\n }\n}\n"]} |