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// A simple implementation of make-array
function makeArray (subject) {
return Array.isArray(subject)
? subject
: [subject]
}
const EMPTY = ''
const SPACE = ' '
const ESCAPE = '\\'
const REGEX_TEST_BLANK_LINE = /^\s+$/
const REGEX_REPLACE_LEADING_EXCAPED_EXCLAMATION = /^\\!/
const REGEX_REPLACE_LEADING_EXCAPED_HASH = /^\\#/
const REGEX_SPLITALL_CRLF = /\r?\n/g
// /foo,
// ./foo,
// ../foo,
// .
// ..
const REGEX_TEST_INVALID_PATH = /^\.*\/|^\.+$/
const SLASH = '/'
const KEY_IGNORE = typeof Symbol !== 'undefined'
? Symbol.for('node-ignore')
/* istanbul ignore next */
: 'node-ignore'
const define = (object, key, value) =>
Object.defineProperty(object, key, {value})
const REGEX_REGEXP_RANGE = /([0-z])-([0-z])/g
// Sanitize the range of a regular expression
// The cases are complicated, see test cases for details
const sanitizeRange = range => range.replace(
REGEX_REGEXP_RANGE,
(match, from, to) => from.charCodeAt(0) <= to.charCodeAt(0)
? match
// Invalid range (out of order) which is ok for gitignore rules but
// fatal for JavaScript regular expression, so eliminate it.
: EMPTY
)
// See fixtures #59
const cleanRangeBackSlash = slashes => {
const {length} = slashes
return slashes.slice(0, length - length % 2)
}
// > If the pattern ends with a slash,
// > it is removed for the purpose of the following description,
// > but it would only find a match with a directory.
// > In other words, foo/ will match a directory foo and paths underneath it,
// > but will not match a regular file or a symbolic link foo
// > (this is consistent with the way how pathspec works in general in Git).
// '`foo/`' will not match regular file '`foo`' or symbolic link '`foo`'
// -> ignore-rules will not deal with it, because it costs extra `fs.stat` call
// you could use option `mark: true` with `glob`
// '`foo/`' should not continue with the '`..`'
const REPLACERS = [
// > Trailing spaces are ignored unless they are quoted with backslash ("\")
[
// (a\ ) -> (a )
// (a ) -> (a)
// (a \ ) -> (a )
/\\?\s+$/,
match => match.indexOf('\\') === 0
? SPACE
: EMPTY
],
// replace (\ ) with ' '
[
/\\\s/g,
() => SPACE
],
// Escape metacharacters
// which is written down by users but means special for regular expressions.
// > There are 12 characters with special meanings:
// > - the backslash \,
// > - the caret ^,
// > - the dollar sign $,
// > - the period or dot .,
// > - the vertical bar or pipe symbol |,
// > - the question mark ?,
// > - the asterisk or star *,
// > - the plus sign +,
// > - the opening parenthesis (,
// > - the closing parenthesis ),
// > - and the opening square bracket [,
// > - the opening curly brace {,
// > These special characters are often called "metacharacters".
[
/[\\$.|*+(){^]/g,
match => `\\${match}`
],
[
// > a question mark (?) matches a single character
/(?!\\)\?/g,
() => '[^/]'
],
// leading slash
[
// > A leading slash matches the beginning of the pathname.
// > For example, "/*.c" matches "cat-file.c" but not "mozilla-sha1/sha1.c".
// A leading slash matches the beginning of the pathname
/^\//,
() => '^'
],
// replace special metacharacter slash after the leading slash
[
/\//g,
() => '\\/'
],
[
// > A leading "**" followed by a slash means match in all directories.
// > For example, "**/foo" matches file or directory "foo" anywhere,
// > the same as pattern "foo".
// > "**/foo/bar" matches file or directory "bar" anywhere that is directly
// > under directory "foo".
// Notice that the '*'s have been replaced as '\\*'
/^\^*\\\*\\\*\\\//,
// '**/foo' <-> 'foo'
() => '^(?:.*\\/)?'
],
// starting
[
// there will be no leading '/'
// (which has been replaced by section "leading slash")
// If starts with '**', adding a '^' to the regular expression also works
/^(?=[^^])/,
function startingReplacer () {
// If has a slash `/` at the beginning or middle
return !/\/(?!$)/.test(this)
// > Prior to 2.22.1
// > If the pattern does not contain a slash /,
// > Git treats it as a shell glob pattern
// Actually, if there is only a trailing slash,
// git also treats it as a shell glob pattern
// After 2.22.1 (compatible but clearer)
// > If there is a separator at the beginning or middle (or both)
// > of the pattern, then the pattern is relative to the directory
// > level of the particular .gitignore file itself.
// > Otherwise the pattern may also match at any level below
// > the .gitignore level.
? '(?:^|\\/)'
// > Otherwise, Git treats the pattern as a shell glob suitable for
// > consumption by fnmatch(3)
: '^'
}
],
// two globstars
[
// Use lookahead assertions so that we could match more than one `'/**'`
/\\\/\\\*\\\*(?=\\\/|$)/g,
// Zero, one or several directories
// should not use '*', or it will be replaced by the next replacer
// Check if it is not the last `'/**'`
(_, index, str) => index + 6 < str.length
// case: /**/
// > A slash followed by two consecutive asterisks then a slash matches
// > zero or more directories.
// > For example, "a/**/b" matches "a/b", "a/x/b", "a/x/y/b" and so on.
// '/**/'
? '(?:\\/[^\\/]+)*'
// case: /**
// > A trailing `"/**"` matches everything inside.
// #21: everything inside but it should not include the current folder
: '\\/.+'
],
// intermediate wildcards
[
// Never replace escaped '*'
// ignore rule '\*' will match the path '*'
// 'abc.*/' -> go
// 'abc.*' -> skip this rule
/(^|[^\\]+)\\\*(?=.+)/g,
// '*.js' matches '.js'
// '*.js' doesn't match 'abc'
(_, p1) => `${p1}[^\\/]*`
],
[
// unescape, revert step 3 except for back slash
// For example, if a user escape a '\\*',
// after step 3, the result will be '\\\\\\*'
/\\\\\\(?=[$.|*+(){^])/g,
() => ESCAPE
],
[
// '\\\\' -> '\\'
/\\\\/g,
() => ESCAPE
],
[
// > The range notation, e.g. [a-zA-Z],
// > can be used to match one of the characters in a range.
// `\` is escaped by step 3
/(\\)?\[([^\]/]*?)(\\*)($|\])/g,
(match, leadEscape, range, endEscape, close) => leadEscape === ESCAPE
// '\\[bar]' -> '\\\\[bar\\]'
? `\\[${range}${cleanRangeBackSlash(endEscape)}${close}`
: close === ']'
? endEscape.length % 2 === 0
// A normal case, and it is a range notation
// '[bar]'
// '[bar\\\\]'
? `[${sanitizeRange(range)}${endEscape}]`
// Invalid range notaton
// '[bar\\]' -> '[bar\\\\]'
: '[]'
: '[]'
],
// ending
[
// 'js' will not match 'js.'
// 'ab' will not match 'abc'
/(?:[^*])$/,
// WTF!
// https://git-scm.com/docs/gitignore
// changes in [2.22.1](https://git-scm.com/docs/gitignore/2.22.1)
// which re-fixes #24, #38
// > If there is a separator at the end of the pattern then the pattern
// > will only match directories, otherwise the pattern can match both
// > files and directories.
// 'js*' will not match 'a.js'
// 'js/' will not match 'a.js'
// 'js' will match 'a.js' and 'a.js/'
match => /\/$/.test(match)
// foo/ will not match 'foo'
? `${match}$`
// foo matches 'foo' and 'foo/'
: `${match}(?=$|\\/$)`
],
// trailing wildcard
[
/(\^|\\\/)?\\\*$/,
(_, p1) => {
const prefix = p1
// '\^':
// '/*' does not match EMPTY
// '/*' does not match everything
// '\\\/':
// 'abc/*' does not match 'abc/'
? `${p1}[^/]+`
// 'a*' matches 'a'
// 'a*' matches 'aa'
: '[^/]*'
return `${prefix}(?=$|\\/$)`
}
],
]
// A simple cache, because an ignore rule only has only one certain meaning
const regexCache = Object.create(null)
// @param {pattern}
const makeRegex = (pattern, negative, ignorecase) => {
const r = regexCache[pattern]
if (r) {
return r
}
// const replacers = negative
// ? NEGATIVE_REPLACERS
// : POSITIVE_REPLACERS
const source = REPLACERS.reduce(
(prev, current) => prev.replace(current[0], current[1].bind(pattern)),
pattern
)
return regexCache[pattern] = ignorecase
? new RegExp(source, 'i')
: new RegExp(source)
}
const isString = subject => typeof subject === 'string'
// > A blank line matches no files, so it can serve as a separator for readability.
const checkPattern = pattern => pattern
&& isString(pattern)
&& !REGEX_TEST_BLANK_LINE.test(pattern)
// > A line starting with # serves as a comment.
&& pattern.indexOf('#') !== 0
const splitPattern = pattern => pattern.split(REGEX_SPLITALL_CRLF)
class IgnoreRule {
constructor (
origin,
pattern,
negative,
regex
) {
this.origin = origin
this.pattern = pattern
this.negative = negative
this.regex = regex
}
}
const createRule = (pattern, ignorecase) => {
const origin = pattern
let negative = false
// > An optional prefix "!" which negates the pattern;
if (pattern.indexOf('!') === 0) {
negative = true
pattern = pattern.substr(1)
}
pattern = pattern
// > Put a backslash ("\") in front of the first "!" for patterns that
// > begin with a literal "!", for example, `"\!important!.txt"`.
.replace(REGEX_REPLACE_LEADING_EXCAPED_EXCLAMATION, '!')
// > Put a backslash ("\") in front of the first hash for patterns that
// > begin with a hash.
.replace(REGEX_REPLACE_LEADING_EXCAPED_HASH, '#')
const regex = makeRegex(pattern, negative, ignorecase)
return new IgnoreRule(
origin,
pattern,
negative,
regex
)
}
const throwError = (message, Ctor) => {
throw new Ctor(message)
}
const checkPath = (path, originalPath, doThrow) => {
if (!isString(path)) {
return doThrow(
`path must be a string, but got \`${originalPath}\``,
TypeError
)
}
// We don't know if we should ignore EMPTY, so throw
if (!path) {
return doThrow(`path must not be empty`, TypeError)
}
// Check if it is a relative path
if (checkPath.isNotRelative(path)) {
const r = '`path.relative()`d'
return doThrow(
`path should be a ${r} string, but got "${originalPath}"`,
RangeError
)
}
return true
}
const isNotRelative = path => REGEX_TEST_INVALID_PATH.test(path)
checkPath.isNotRelative = isNotRelative
checkPath.convert = p => p
class Ignore {
constructor ({
ignorecase = true
} = {}) {
this._rules = []
this._ignorecase = ignorecase
define(this, KEY_IGNORE, true)
this._initCache()
}
_initCache () {
this._ignoreCache = Object.create(null)
this._testCache = Object.create(null)
}
_addPattern (pattern) {
// #32
if (pattern && pattern[KEY_IGNORE]) {
this._rules = this._rules.concat(pattern._rules)
this._added = true
return
}
if (checkPattern(pattern)) {
const rule = createRule(pattern, this._ignorecase)
this._added = true
this._rules.push(rule)
}
}
// @param {Array<string> | string | Ignore} pattern
add (pattern) {
this._added = false
makeArray(
isString(pattern)
? splitPattern(pattern)
: pattern
).forEach(this._addPattern, this)
// Some rules have just added to the ignore,
// making the behavior changed.
if (this._added) {
this._initCache()
}
return this
}
// legacy
addPattern (pattern) {
return this.add(pattern)
}
// | ignored : unignored
// negative | 0:0 | 0:1 | 1:0 | 1:1
// -------- | ------- | ------- | ------- | --------
// 0 | TEST | TEST | SKIP | X
// 1 | TESTIF | SKIP | TEST | X
// - SKIP: always skip
// - TEST: always test
// - TESTIF: only test if checkUnignored
// - X: that never happen
// @param {boolean} whether should check if the path is unignored,
// setting `checkUnignored` to `false` could reduce additional
// path matching.
// @returns {TestResult} true if a file is ignored
_testOne (path, checkUnignored) {
let ignored = false
let unignored = false
this._rules.forEach(rule => {
const {negative} = rule
if (
unignored === negative && ignored !== unignored
|| negative && !ignored && !unignored && !checkUnignored
) {
return
}
const matched = rule.regex.test(path)
if (matched) {
ignored = !negative
unignored = negative
}
})
return {
ignored,
unignored
}
}
// @returns {TestResult}
_test (originalPath, cache, checkUnignored, slices) {
const path = originalPath
// Supports nullable path
&& checkPath.convert(originalPath)
checkPath(path, originalPath, throwError)
return this._t(path, cache, checkUnignored, slices)
}
_t (path, cache, checkUnignored, slices) {
if (path in cache) {
return cache[path]
}
if (!slices) {
// path/to/a.js
// ['path', 'to', 'a.js']
slices = path.split(SLASH)
}
slices.pop()
// If the path has no parent directory, just test it
if (!slices.length) {
return cache[path] = this._testOne(path, checkUnignored)
}
const parent = this._t(
slices.join(SLASH) + SLASH,
cache,
checkUnignored,
slices
)
// If the path contains a parent directory, check the parent first
return cache[path] = parent.ignored
// > It is not possible to re-include a file if a parent directory of
// > that file is excluded.
? parent
: this._testOne(path, checkUnignored)
}
ignores (path) {
return this._test(path, this._ignoreCache, false).ignored
}
createFilter () {
return path => !this.ignores(path)
}
filter (paths) {
return makeArray(paths).filter(this.createFilter())
}
// @returns {TestResult}
test (path) {
return this._test(path, this._testCache, true)
}
}
const factory = options => new Ignore(options)
const returnFalse = () => false
const isPathValid = path =>
checkPath(path && checkPath.convert(path), path, returnFalse)
factory.isPathValid = isPathValid
// Fixes typescript
factory.default = factory
module.exports = factory
// Windows
// --------------------------------------------------------------
/* istanbul ignore if */
if (
// Detect `process` so that it can run in browsers.
typeof process !== 'undefined'
&& (
process.env && process.env.IGNORE_TEST_WIN32
|| process.platform === 'win32'
)
) {
/* eslint no-control-regex: "off" */
const makePosix = str => /^\\\\\?\\/.test(str)
|| /["<>|\u0000-\u001F]+/u.test(str)
? str
: str.replace(/\\/g, '/')
checkPath.convert = makePosix
// 'C:\\foo' <- 'C:\\foo' has been converted to 'C:/'
// 'd:\\foo'
const REGIX_IS_WINDOWS_PATH_ABSOLUTE = /^[a-z]:\//i
checkPath.isNotRelative = path =>
REGIX_IS_WINDOWS_PATH_ABSOLUTE.test(path)
|| isNotRelative(path)
}