lepu-test-platform-web/node_modules/picomatch/lib/parse.js

1079 lines
26 KiB
JavaScript
Raw Normal View History

'use strict';
const constants = require('./constants');
const utils = require('./utils');
/**
* Constants
*/
const {
MAX_LENGTH,
POSIX_REGEX_SOURCE,
REGEX_NON_SPECIAL_CHARS,
REGEX_SPECIAL_CHARS_BACKREF,
REPLACEMENTS
} = constants;
/**
* Helpers
*/
const expandRange = (args, options) => {
if (typeof options.expandRange === 'function') {
return options.expandRange(...args, options);
}
args.sort();
const value = `[${args.join('-')}]`;
try {
/* eslint-disable-next-line no-new */
new RegExp(value);
} catch (ex) {
return args.map(v => utils.escapeRegex(v)).join('..');
}
return value;
};
/**
* Create the message for a syntax error
*/
const syntaxError = (type, char) => {
return `Missing ${type}: "${char}" - use "\\\\${char}" to match literal characters`;
};
/**
* Parse the given input string.
* @param {String} input
* @param {Object} options
* @return {Object}
*/
const parse = (input, options) => {
if (typeof input !== 'string') {
throw new TypeError('Expected a string');
}
input = REPLACEMENTS[input] || input;
const opts = { ...options };
const max = typeof opts.maxLength === 'number' ? Math.min(MAX_LENGTH, opts.maxLength) : MAX_LENGTH;
let len = input.length;
if (len > max) {
throw new SyntaxError(`Input length: ${len}, exceeds maximum allowed length: ${max}`);
}
const bos = { type: 'bos', value: '', output: opts.prepend || '' };
const tokens = [bos];
const capture = opts.capture ? '' : '?:';
const win32 = utils.isWindows(options);
// create constants based on platform, for windows or posix
const PLATFORM_CHARS = constants.globChars(win32);
const EXTGLOB_CHARS = constants.extglobChars(PLATFORM_CHARS);
const {
DOT_LITERAL,
PLUS_LITERAL,
SLASH_LITERAL,
ONE_CHAR,
DOTS_SLASH,
NO_DOT,
NO_DOT_SLASH,
NO_DOTS_SLASH,
QMARK,
QMARK_NO_DOT,
STAR,
START_ANCHOR
} = PLATFORM_CHARS;
const globstar = (opts) => {
return `(${capture}(?:(?!${START_ANCHOR}${opts.dot ? DOTS_SLASH : DOT_LITERAL}).)*?)`;
};
const nodot = opts.dot ? '' : NO_DOT;
const qmarkNoDot = opts.dot ? QMARK : QMARK_NO_DOT;
let star = opts.bash === true ? globstar(opts) : STAR;
if (opts.capture) {
star = `(${star})`;
}
// minimatch options support
if (typeof opts.noext === 'boolean') {
opts.noextglob = opts.noext;
}
const state = {
input,
index: -1,
start: 0,
dot: opts.dot === true,
consumed: '',
output: '',
prefix: '',
backtrack: false,
negated: false,
brackets: 0,
braces: 0,
parens: 0,
quotes: 0,
globstar: false,
tokens
};
input = utils.removePrefix(input, state);
len = input.length;
const extglobs = [];
const braces = [];
const stack = [];
let prev = bos;
let value;
/**
* Tokenizing helpers
*/
const eos = () => state.index === len - 1;
const peek = state.peek = (n = 1) => input[state.index + n];
const advance = state.advance = () => input[++state.index];
const remaining = () => input.slice(state.index + 1);
const consume = (value = '', num = 0) => {
state.consumed += value;
state.index += num;
};
const append = token => {
state.output += token.output != null ? token.output : token.value;
consume(token.value);
};
const negate = () => {
let count = 1;
while (peek() === '!' && (peek(2) !== '(' || peek(3) === '?')) {
advance();
state.start++;
count++;
}
if (count % 2 === 0) {
return false;
}
state.negated = true;
state.start++;
return true;
};
const increment = type => {
state[type]++;
stack.push(type);
};
const decrement = type => {
state[type]--;
stack.pop();
};
/**
* Push tokens onto the tokens array. This helper speeds up
* tokenizing by 1) helping us avoid backtracking as much as possible,
* and 2) helping us avoid creating extra tokens when consecutive
* characters are plain text. This improves performance and simplifies
* lookbehinds.
*/
const push = tok => {
if (prev.type === 'globstar') {
const isBrace = state.braces > 0 && (tok.type === 'comma' || tok.type === 'brace');
const isExtglob = tok.extglob === true || (extglobs.length && (tok.type === 'pipe' || tok.type === 'paren'));
if (tok.type !== 'slash' && tok.type !== 'paren' && !isBrace && !isExtglob) {
state.output = state.output.slice(0, -prev.output.length);
prev.type = 'star';
prev.value = '*';
prev.output = star;
state.output += prev.output;
}
}
if (extglobs.length && tok.type !== 'paren' && !EXTGLOB_CHARS[tok.value]) {
extglobs[extglobs.length - 1].inner += tok.value;
}
if (tok.value || tok.output) append(tok);
if (prev && prev.type === 'text' && tok.type === 'text') {
prev.value += tok.value;
prev.output = (prev.output || '') + tok.value;
return;
}
tok.prev = prev;
tokens.push(tok);
prev = tok;
};
const extglobOpen = (type, value) => {
const token = { ...EXTGLOB_CHARS[value], conditions: 1, inner: '' };
token.prev = prev;
token.parens = state.parens;
token.output = state.output;
const output = (opts.capture ? '(' : '') + token.open;
increment('parens');
push({ type, value, output: state.output ? '' : ONE_CHAR });
push({ type: 'paren', extglob: true, value: advance(), output });
extglobs.push(token);
};
const extglobClose = token => {
let output = token.close + (opts.capture ? ')' : '');
if (token.type === 'negate') {
let extglobStar = star;
if (token.inner && token.inner.length > 1 && token.inner.includes('/')) {
extglobStar = globstar(opts);
}
if (extglobStar !== star || eos() || /^\)+$/.test(remaining())) {
output = token.close = `)$))${extglobStar}`;
}
if (token.prev.type === 'bos' && eos()) {
state.negatedExtglob = true;
}
}
push({ type: 'paren', extglob: true, value, output });
decrement('parens');
};
/**
* Fast paths
*/
if (opts.fastpaths !== false && !/(^[*!]|[/()[\]{}"])/.test(input)) {
let backslashes = false;
let output = input.replace(REGEX_SPECIAL_CHARS_BACKREF, (m, esc, chars, first, rest, index) => {
if (first === '\\') {
backslashes = true;
return m;
}
if (first === '?') {
if (esc) {
return esc + first + (rest ? QMARK.repeat(rest.length) : '');
}
if (index === 0) {
return qmarkNoDot + (rest ? QMARK.repeat(rest.length) : '');
}
return QMARK.repeat(chars.length);
}
if (first === '.') {
return DOT_LITERAL.repeat(chars.length);
}
if (first === '*') {
if (esc) {
return esc + first + (rest ? star : '');
}
return star;
}
return esc ? m : `\\${m}`;
});
if (backslashes === true) {
if (opts.unescape === true) {
output = output.replace(/\\/g, '');
} else {
output = output.replace(/\\+/g, m => {
return m.length % 2 === 0 ? '\\\\' : (m ? '\\' : '');
});
}
}
if (output === input && opts.contains === true) {
state.output = input;
return state;
}
state.output = utils.wrapOutput(output, state, options);
return state;
}
/**
* Tokenize input until we reach end-of-string
*/
while (!eos()) {
value = advance();
if (value === '\u0000') {
continue;
}
/**
* Escaped characters
*/
if (value === '\\') {
const next = peek();
if (next === '/' && opts.bash !== true) {
continue;
}
if (next === '.' || next === ';') {
continue;
}
if (!next) {
value += '\\';
push({ type: 'text', value });
continue;
}
// collapse slashes to reduce potential for exploits
const match = /^\\+/.exec(remaining());
let slashes = 0;
if (match && match[0].length > 2) {
slashes = match[0].length;
state.index += slashes;
if (slashes % 2 !== 0) {
value += '\\';
}
}
if (opts.unescape === true) {
value = advance() || '';
} else {
value += advance() || '';
}
if (state.brackets === 0) {
push({ type: 'text', value });
continue;
}
}
/**
* If we're inside a regex character class, continue
* until we reach the closing bracket.
*/
if (state.brackets > 0 && (value !== ']' || prev.value === '[' || prev.value === '[^')) {
if (opts.posix !== false && value === ':') {
const inner = prev.value.slice(1);
if (inner.includes('[')) {
prev.posix = true;
if (inner.includes(':')) {
const idx = prev.value.lastIndexOf('[');
const pre = prev.value.slice(0, idx);
const rest = prev.value.slice(idx + 2);
const posix = POSIX_REGEX_SOURCE[rest];
if (posix) {
prev.value = pre + posix;
state.backtrack = true;
advance();
if (!bos.output && tokens.indexOf(prev) === 1) {
bos.output = ONE_CHAR;
}
continue;
}
}
}
}
if ((value === '[' && peek() !== ':') || (value === '-' && peek() === ']')) {
value = `\\${value}`;
}
if (value === ']' && (prev.value === '[' || prev.value === '[^')) {
value = `\\${value}`;
}
if (opts.posix === true && value === '!' && prev.value === '[') {
value = '^';
}
prev.value += value;
append({ value });
continue;
}
/**
* If we're inside a quoted string, continue
* until we reach the closing double quote.
*/
if (state.quotes === 1 && value !== '"') {
value = utils.escapeRegex(value);
prev.value += value;
append({ value });
continue;
}
/**
* Double quotes
*/
if (value === '"') {
state.quotes = state.quotes === 1 ? 0 : 1;
if (opts.keepQuotes === true) {
push({ type: 'text', value });
}
continue;
}
/**
* Parentheses
*/
if (value === '(') {
increment('parens');
push({ type: 'paren', value });
continue;
}
if (value === ')') {
if (state.parens === 0 && opts.strictBrackets === true) {
throw new SyntaxError(syntaxError('opening', '('));
}
const extglob = extglobs[extglobs.length - 1];
if (extglob && state.parens === extglob.parens + 1) {
extglobClose(extglobs.pop());
continue;
}
push({ type: 'paren', value, output: state.parens ? ')' : '\\)' });
decrement('parens');
continue;
}
/**
* Square brackets
*/
if (value === '[') {
if (opts.nobracket === true || !remaining().includes(']')) {
if (opts.nobracket !== true && opts.strictBrackets === true) {
throw new SyntaxError(syntaxError('closing', ']'));
}
value = `\\${value}`;
} else {
increment('brackets');
}
push({ type: 'bracket', value });
continue;
}
if (value === ']') {
if (opts.nobracket === true || (prev && prev.type === 'bracket' && prev.value.length === 1)) {
push({ type: 'text', value, output: `\\${value}` });
continue;
}
if (state.brackets === 0) {
if (opts.strictBrackets === true) {
throw new SyntaxError(syntaxError('opening', '['));
}
push({ type: 'text', value, output: `\\${value}` });
continue;
}
decrement('brackets');
const prevValue = prev.value.slice(1);
if (prev.posix !== true && prevValue[0] === '^' && !prevValue.includes('/')) {
value = `/${value}`;
}
prev.value += value;
append({ value });
// when literal brackets are explicitly disabled
// assume we should match with a regex character class
if (opts.literalBrackets === false || utils.hasRegexChars(prevValue)) {
continue;
}
const escaped = utils.escapeRegex(prev.value);
state.output = state.output.slice(0, -prev.value.length);
// when literal brackets are explicitly enabled
// assume we should escape the brackets to match literal characters
if (opts.literalBrackets === true) {
state.output += escaped;
prev.value = escaped;
continue;
}
// when the user specifies nothing, try to match both
prev.value = `(${capture}${escaped}|${prev.value})`;
state.output += prev.value;
continue;
}
/**
* Braces
*/
if (value === '{' && opts.nobrace !== true) {
increment('braces');
const open = {
type: 'brace',
value,
output: '(',
outputIndex: state.output.length,
tokensIndex: state.tokens.length
};
braces.push(open);
push(open);
continue;
}
if (value === '}') {
const brace = braces[braces.length - 1];
if (opts.nobrace === true || !brace) {
push({ type: 'text', value, output: value });
continue;
}
let output = ')';
if (brace.dots === true) {
const arr = tokens.slice();
const range = [];
for (let i = arr.length - 1; i >= 0; i--) {
tokens.pop();
if (arr[i].type === 'brace') {
break;
}
if (arr[i].type !== 'dots') {
range.unshift(arr[i].value);
}
}
output = expandRange(range, opts);
state.backtrack = true;
}
if (brace.comma !== true && brace.dots !== true) {
const out = state.output.slice(0, brace.outputIndex);
const toks = state.tokens.slice(brace.tokensIndex);
brace.value = brace.output = '\\{';
value = output = '\\}';
state.output = out;
for (const t of toks) {
state.output += (t.output || t.value);
}
}
push({ type: 'brace', value, output });
decrement('braces');
braces.pop();
continue;
}
/**
* Pipes
*/
if (value === '|') {
if (extglobs.length > 0) {
extglobs[extglobs.length - 1].conditions++;
}
push({ type: 'text', value });
continue;
}
/**
* Commas
*/
if (value === ',') {
let output = value;
const brace = braces[braces.length - 1];
if (brace && stack[stack.length - 1] === 'braces') {
brace.comma = true;
output = '|';
}
push({ type: 'comma', value, output });
continue;
}
/**
* Slashes
*/
if (value === '/') {
// if the beginning of the glob is "./", advance the start
// to the current index, and don't add the "./" characters
// to the state. This greatly simplifies lookbehinds when
// checking for BOS characters like "!" and "." (not "./")
if (prev.type === 'dot' && state.index === state.start + 1) {
state.start = state.index + 1;
state.consumed = '';
state.output = '';
tokens.pop();
prev = bos; // reset "prev" to the first token
continue;
}
push({ type: 'slash', value, output: SLASH_LITERAL });
continue;
}
/**
* Dots
*/
if (value === '.') {
if (state.braces > 0 && prev.type === 'dot') {
if (prev.value === '.') prev.output = DOT_LITERAL;
const brace = braces[braces.length - 1];
prev.type = 'dots';
prev.output += value;
prev.value += value;
brace.dots = true;
continue;
}
if ((state.braces + state.parens) === 0 && prev.type !== 'bos' && prev.type !== 'slash') {
push({ type: 'text', value, output: DOT_LITERAL });
continue;
}
push({ type: 'dot', value, output: DOT_LITERAL });
continue;
}
/**
* Question marks
*/
if (value === '?') {
const isGroup = prev && prev.value === '(';
if (!isGroup && opts.noextglob !== true && peek() === '(' && peek(2) !== '?') {
extglobOpen('qmark', value);
continue;
}
if (prev && prev.type === 'paren') {
const next = peek();
let output = value;
if (next === '<' && !utils.supportsLookbehinds()) {
throw new Error('Node.js v10 or higher is required for regex lookbehinds');
}
if ((prev.value === '(' && !/[!=<:]/.test(next)) || (next === '<' && !/<([!=]|\w+>)/.test(remaining()))) {
output = `\\${value}`;
}
push({ type: 'text', value, output });
continue;
}
if (opts.dot !== true && (prev.type === 'slash' || prev.type === 'bos')) {
push({ type: 'qmark', value, output: QMARK_NO_DOT });
continue;
}
push({ type: 'qmark', value, output: QMARK });
continue;
}
/**
* Exclamation
*/
if (value === '!') {
if (opts.noextglob !== true && peek() === '(') {
if (peek(2) !== '?' || !/[!=<:]/.test(peek(3))) {
extglobOpen('negate', value);
continue;
}
}
if (opts.nonegate !== true && state.index === 0) {
negate();
continue;
}
}
/**
* Plus
*/
if (value === '+') {
if (opts.noextglob !== true && peek() === '(' && peek(2) !== '?') {
extglobOpen('plus', value);
continue;
}
if ((prev && prev.value === '(') || opts.regex === false) {
push({ type: 'plus', value, output: PLUS_LITERAL });
continue;
}
if ((prev && (prev.type === 'bracket' || prev.type === 'paren' || prev.type === 'brace')) || state.parens > 0) {
push({ type: 'plus', value });
continue;
}
push({ type: 'plus', value: PLUS_LITERAL });
continue;
}
/**
* Plain text
*/
if (value === '@') {
if (opts.noextglob !== true && peek() === '(' && peek(2) !== '?') {
push({ type: 'at', extglob: true, value, output: '' });
continue;
}
push({ type: 'text', value });
continue;
}
/**
* Plain text
*/
if (value !== '*') {
if (value === '$' || value === '^') {
value = `\\${value}`;
}
const match = REGEX_NON_SPECIAL_CHARS.exec(remaining());
if (match) {
value += match[0];
state.index += match[0].length;
}
push({ type: 'text', value });
continue;
}
/**
* Stars
*/
if (prev && (prev.type === 'globstar' || prev.star === true)) {
prev.type = 'star';
prev.star = true;
prev.value += value;
prev.output = star;
state.backtrack = true;
state.globstar = true;
consume(value);
continue;
}
let rest = remaining();
if (opts.noextglob !== true && /^\([^?]/.test(rest)) {
extglobOpen('star', value);
continue;
}
if (prev.type === 'star') {
if (opts.noglobstar === true) {
consume(value);
continue;
}
const prior = prev.prev;
const before = prior.prev;
const isStart = prior.type === 'slash' || prior.type === 'bos';
const afterStar = before && (before.type === 'star' || before.type === 'globstar');
if (opts.bash === true && (!isStart || (rest[0] && rest[0] !== '/'))) {
push({ type: 'star', value, output: '' });
continue;
}
const isBrace = state.braces > 0 && (prior.type === 'comma' || prior.type === 'brace');
const isExtglob = extglobs.length && (prior.type === 'pipe' || prior.type === 'paren');
if (!isStart && prior.type !== 'paren' && !isBrace && !isExtglob) {
push({ type: 'star', value, output: '' });
continue;
}
// strip consecutive `/**/`
while (rest.slice(0, 3) === '/**') {
const after = input[state.index + 4];
if (after && after !== '/') {
break;
}
rest = rest.slice(3);
consume('/**', 3);
}
if (prior.type === 'bos' && eos()) {
prev.type = 'globstar';
prev.value += value;
prev.output = globstar(opts);
state.output = prev.output;
state.globstar = true;
consume(value);
continue;
}
if (prior.type === 'slash' && prior.prev.type !== 'bos' && !afterStar && eos()) {
state.output = state.output.slice(0, -(prior.output + prev.output).length);
prior.output = `(?:${prior.output}`;
prev.type = 'globstar';
prev.output = globstar(opts) + (opts.strictSlashes ? ')' : '|$)');
prev.value += value;
state.globstar = true;
state.output += prior.output + prev.output;
consume(value);
continue;
}
if (prior.type === 'slash' && prior.prev.type !== 'bos' && rest[0] === '/') {
const end = rest[1] !== void 0 ? '|$' : '';
state.output = state.output.slice(0, -(prior.output + prev.output).length);
prior.output = `(?:${prior.output}`;
prev.type = 'globstar';
prev.output = `${globstar(opts)}${SLASH_LITERAL}|${SLASH_LITERAL}${end})`;
prev.value += value;
state.output += prior.output + prev.output;
state.globstar = true;
consume(value + advance());
push({ type: 'slash', value: '/', output: '' });
continue;
}
if (prior.type === 'bos' && rest[0] === '/') {
prev.type = 'globstar';
prev.value += value;
prev.output = `(?:^|${SLASH_LITERAL}|${globstar(opts)}${SLASH_LITERAL})`;
state.output = prev.output;
state.globstar = true;
consume(value + advance());
push({ type: 'slash', value: '/', output: '' });
continue;
}
// remove single star from output
state.output = state.output.slice(0, -prev.output.length);
// reset previous token to globstar
prev.type = 'globstar';
prev.output = globstar(opts);
prev.value += value;
// reset output with globstar
state.output += prev.output;
state.globstar = true;
consume(value);
continue;
}
const token = { type: 'star', value, output: star };
if (opts.bash === true) {
token.output = '.*?';
if (prev.type === 'bos' || prev.type === 'slash') {
token.output = nodot + token.output;
}
push(token);
continue;
}
if (prev && (prev.type === 'bracket' || prev.type === 'paren') && opts.regex === true) {
token.output = value;
push(token);
continue;
}
if (state.index === state.start || prev.type === 'slash' || prev.type === 'dot') {
if (prev.type === 'dot') {
state.output += NO_DOT_SLASH;
prev.output += NO_DOT_SLASH;
} else if (opts.dot === true) {
state.output += NO_DOTS_SLASH;
prev.output += NO_DOTS_SLASH;
} else {
state.output += nodot;
prev.output += nodot;
}
if (peek() !== '*') {
state.output += ONE_CHAR;
prev.output += ONE_CHAR;
}
}
push(token);
}
while (state.brackets > 0) {
if (opts.strictBrackets === true) throw new SyntaxError(syntaxError('closing', ']'));
state.output = utils.escapeLast(state.output, '[');
decrement('brackets');
}
while (state.parens > 0) {
if (opts.strictBrackets === true) throw new SyntaxError(syntaxError('closing', ')'));
state.output = utils.escapeLast(state.output, '(');
decrement('parens');
}
while (state.braces > 0) {
if (opts.strictBrackets === true) throw new SyntaxError(syntaxError('closing', '}'));
state.output = utils.escapeLast(state.output, '{');
decrement('braces');
}
if (opts.strictSlashes !== true && (prev.type === 'star' || prev.type === 'bracket')) {
push({ type: 'maybe_slash', value: '', output: `${SLASH_LITERAL}?` });
}
// rebuild the output if we had to backtrack at any point
if (state.backtrack === true) {
state.output = '';
for (const token of state.tokens) {
state.output += token.output != null ? token.output : token.value;
if (token.suffix) {
state.output += token.suffix;
}
}
}
return state;
};
/**
* Fast paths for creating regular expressions for common glob patterns.
* This can significantly speed up processing and has very little downside
* impact when none of the fast paths match.
*/
parse.fastpaths = (input, options) => {
const opts = { ...options };
const max = typeof opts.maxLength === 'number' ? Math.min(MAX_LENGTH, opts.maxLength) : MAX_LENGTH;
const len = input.length;
if (len > max) {
throw new SyntaxError(`Input length: ${len}, exceeds maximum allowed length: ${max}`);
}
input = REPLACEMENTS[input] || input;
const win32 = utils.isWindows(options);
// create constants based on platform, for windows or posix
const {
DOT_LITERAL,
SLASH_LITERAL,
ONE_CHAR,
DOTS_SLASH,
NO_DOT,
NO_DOTS,
NO_DOTS_SLASH,
STAR,
START_ANCHOR
} = constants.globChars(win32);
const nodot = opts.dot ? NO_DOTS : NO_DOT;
const slashDot = opts.dot ? NO_DOTS_SLASH : NO_DOT;
const capture = opts.capture ? '' : '?:';
const state = { negated: false, prefix: '' };
let star = opts.bash === true ? '.*?' : STAR;
if (opts.capture) {
star = `(${star})`;
}
const globstar = (opts) => {
if (opts.noglobstar === true) return star;
return `(${capture}(?:(?!${START_ANCHOR}${opts.dot ? DOTS_SLASH : DOT_LITERAL}).)*?)`;
};
const create = str => {
switch (str) {
case '*':
return `${nodot}${ONE_CHAR}${star}`;
case '.*':
return `${DOT_LITERAL}${ONE_CHAR}${star}`;
case '*.*':
return `${nodot}${star}${DOT_LITERAL}${ONE_CHAR}${star}`;
case '*/*':
return `${nodot}${star}${SLASH_LITERAL}${ONE_CHAR}${slashDot}${star}`;
case '**':
return nodot + globstar(opts);
case '**/*':
return `(?:${nodot}${globstar(opts)}${SLASH_LITERAL})?${slashDot}${ONE_CHAR}${star}`;
case '**/*.*':
return `(?:${nodot}${globstar(opts)}${SLASH_LITERAL})?${slashDot}${star}${DOT_LITERAL}${ONE_CHAR}${star}`;
case '**/.*':
return `(?:${nodot}${globstar(opts)}${SLASH_LITERAL})?${DOT_LITERAL}${ONE_CHAR}${star}`;
default: {
const match = /^(.*?)\.(\w+)$/.exec(str);
if (!match) return;
const source = create(match[1]);
if (!source) return;
return source + DOT_LITERAL + match[2];
}
}
};
const output = utils.removePrefix(input, state);
let source = create(output);
if (source && opts.strictSlashes !== true) {
source += `${SLASH_LITERAL}?`;
}
return source;
};
module.exports = parse;