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// A simple implementation of make-array
function makeArray (subject) {
return Array.isArray(subject)
? subject
: [subject]
}
const UNDEFINED = undefined
const EMPTY = ''
const SPACE = ' '
const ESCAPE = '\\'
const REGEX_TEST_BLANK_LINE = /^\s+$/
const REGEX_INVALID_TRAILING_BACKSLASH = /(?:[^\\]|^)\\$/
const REGEX_REPLACE_LEADING_EXCAPED_EXCLAMATION = /^\\!/
const REGEX_REPLACE_LEADING_EXCAPED_HASH = /^\\#/
const REGEX_SPLITALL_CRLF = /\r?\n/g
// Invalid:
// - /foo,
// - ./foo,
// - ../foo,
// - .
// - ..
// Valid:
// - .foo
const REGEX_TEST_INVALID_PATH = /^\.*\/|^\.+$/
const REGEX_TEST_TRAILING_SLASH = /\/$/
const SLASH = '/'
// Do not use ternary expression here, since "istanbul ignore next" is buggy
let TMP_KEY_IGNORE = 'node-ignore'
/* istanbul ignore else */
if (typeof Symbol !== 'undefined') {
TMP_KEY_IGNORE = Symbol.for('node-ignore')
}
const KEY_IGNORE = TMP_KEY_IGNORE
const define = (object, key, value) => {
Object.defineProperty(object, key, {value})
return value
}
const REGEX_REGEXP_RANGE = /([0-z])-([0-z])/g
const RETURN_FALSE = () => false
// 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 = [
[
// Remove BOM
// TODO:
// Other similar zero-width characters?
/^\uFEFF/,
() => EMPTY
],
// > Trailing spaces are ignored unless they are quoted with backslash ("\")
[
// (a\ ) -> (a )
// (a ) -> (a)
// (a ) -> (a)
// (a \ ) -> (a )
/((?:\\\\)*?)(\\?\s+)$/,
(_, m1, m2) => m1 + (
m2.indexOf('\\') === 0
? SPACE
: EMPTY
)
],
// Replace (\ ) with ' '
// (\ ) -> ' '
// (\\ ) -> '\\ '
// (\\\ ) -> '\\ '
[
/(\\+?)\s/g,
(_, m1) => {
const {length} = m1
return m1.slice(0, length - length % 2) + 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
: '\\/.+'
],
// normal intermediate wildcards
[
// Never replace escaped '*'
// ignore rule '\*' will match the path '*'
// 'abc.*/' -> go
// 'abc.*' -> skip this rule,
// coz trailing single wildcard will be handed by [trailing wildcard]
/(^|[^\\]+)(\\\*)+(?=.+)/g,
// '*.js' matches '.js'
// '*.js' doesn't match 'abc'
(_, p1, p2) => {
// 1.
// > An asterisk "*" matches anything except a slash.
// 2.
// > Other consecutive asterisks are considered regular asterisks
// > and will match according to the previous rules.
const unescaped = p2.replace(/\\\*/g, '[^\\/]*')
return p1 + unescaped
}
],
[
// 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}(?=$|\\/$)`
]
]
const REGEX_REPLACE_TRAILING_WILDCARD = /(^|\\\/)?\\\*$/
const MODE_IGNORE = 'regex'
const MODE_CHECK_IGNORE = 'checkRegex'
const UNDERSCORE = '_'
const TRAILING_WILD_CARD_REPLACERS = {
[MODE_IGNORE] (_, p1) {
const prefix = p1
// '\^':
// '/*' does not match EMPTY
// '/*' does not match everything
// '\\\/':
// 'abc/*' does not match 'abc/'
? `${p1}[^/]+`
// 'a*' matches 'a'
// 'a*' matches 'aa'
: '[^/]*'
return `${prefix}(?=$|\\/$)`
},
[MODE_CHECK_IGNORE] (_, p1) {
// When doing `git check-ignore`
const prefix = p1
// '\\\/':
// 'abc/*' DOES match 'abc/' !
? `${p1}[^/]*`
// 'a*' matches 'a'
// 'a*' matches 'aa'
: '[^/]*'
return `${prefix}(?=$|\\/$)`
}
}
// @param {pattern}
const makeRegexPrefix = pattern => REPLACERS.reduce(
(prev, [matcher, replacer]) =>
prev.replace(matcher, replacer.bind(pattern)),
pattern
)
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)
&& !REGEX_INVALID_TRAILING_BACKSLASH.test(pattern)
// > A line starting with # serves as a comment.
&& pattern.indexOf('#') !== 0
const splitPattern = pattern => pattern
.split(REGEX_SPLITALL_CRLF)
.filter(Boolean)
class IgnoreRule {
constructor (
pattern,
mark,
body,
ignoreCase,
negative,
prefix
) {
this.pattern = pattern
this.mark = mark
this.negative = negative
define(this, 'body', body)
define(this, 'ignoreCase', ignoreCase)
define(this, 'regexPrefix', prefix)
}
get regex () {
const key = UNDERSCORE + MODE_IGNORE
if (this[key]) {
return this[key]
}
return this._make(MODE_IGNORE, key)
}
get checkRegex () {
const key = UNDERSCORE + MODE_CHECK_IGNORE
if (this[key]) {
return this[key]
}
return this._make(MODE_CHECK_IGNORE, key)
}
_make (mode, key) {
const str = this.regexPrefix.replace(
REGEX_REPLACE_TRAILING_WILDCARD,
// It does not need to bind pattern
TRAILING_WILD_CARD_REPLACERS[mode]
)
const regex = this.ignoreCase
? new RegExp(str, 'i')
: new RegExp(str)
return define(this, key, regex)
}
}
const createRule = ({
pattern,
mark
}, ignoreCase) => {
let negative = false
let body = pattern
// > An optional prefix "!" which negates the pattern;
if (body.indexOf('!') === 0) {
negative = true
body = body.substr(1)
}
body = body
// > 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 regexPrefix = makeRegexPrefix(body)
return new IgnoreRule(
pattern,
mark,
body,
ignoreCase,
negative,
regexPrefix
)
}
class RuleManager {
constructor (ignoreCase) {
this._ignoreCase = ignoreCase
this._rules = []
}
_add (pattern) {
// #32
if (pattern && pattern[KEY_IGNORE]) {
this._rules = this._rules.concat(pattern._rules._rules)
this._added = true
return
}
if (isString(pattern)) {
pattern = {
pattern
}
}
if (checkPattern(pattern.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._add, this)
return this._added
}
// Test one single path without recursively checking parent directories
//
// - checkUnignored `boolean` whether should check if the path is unignored,
// setting `checkUnignored` to `false` could reduce additional
// path matching.
// - check `string` either `MODE_IGNORE` or `MODE_CHECK_IGNORE`
// @returns {TestResult} true if a file is ignored
test (path, checkUnignored, mode) {
let ignored = false
let unignored = false
let matchedRule
this._rules.forEach(rule => {
const {negative} = rule
// | 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
if (
unignored === negative && ignored !== unignored
|| negative && !ignored && !unignored && !checkUnignored
) {
return
}
const matched = rule[mode].test(path)
if (!matched) {
return
}
ignored = !negative
unignored = negative
matchedRule = negative
? UNDEFINED
: rule
})
const ret = {
ignored,
unignored
}
if (matchedRule) {
ret.rule = matchedRule
}
return ret
}
}
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
// On windows, the following function will be replaced
/* istanbul ignore next */
checkPath.convert = p => p
class Ignore {
constructor ({
ignorecase = true,
ignoreCase = ignorecase,
allowRelativePaths = false
} = {}) {
define(this, KEY_IGNORE, true)
this._rules = new RuleManager(ignoreCase)
this._strictPathCheck = !allowRelativePaths
this._initCache()
}
_initCache () {
// A cache for the result of `.ignores()`
this._ignoreCache = Object.create(null)
// A cache for the result of `.test()`
this._testCache = Object.create(null)
}
add (pattern) {
if (this._rules.add(pattern)) {
// Some rules have just added to the ignore,
// making the behavior changed,
// so we need to re-initialize the result cache
this._initCache()
}
return this
}
// legacy
addPattern (pattern) {
return this.add(pattern)
}
// @returns {TestResult}
_test (originalPath, cache, checkUnignored, slices) {
const path = originalPath
// Supports nullable path
&& checkPath.convert(originalPath)
checkPath(
path,
originalPath,
this._strictPathCheck
? throwError
: RETURN_FALSE
)
return this._t(path, cache, checkUnignored, slices)
}
checkIgnore (path) {
// If the path doest not end with a slash, `.ignores()` is much equivalent
// to `git check-ignore`
if (!REGEX_TEST_TRAILING_SLASH.test(path)) {
return this.test(path)
}
const slices = path.split(SLASH).filter(Boolean)
slices.pop()
if (slices.length) {
const parent = this._t(
slices.join(SLASH) + SLASH,
this._testCache,
true,
slices
)
if (parent.ignored) {
return parent
}
}
return this._rules.test(path, false, MODE_CHECK_IGNORE)
}
_t (
// The path to be tested
path,
// The cache for the result of a certain checking
cache,
// Whether should check if the path is unignored
checkUnignored,
// The path slices
slices
) {
if (path in cache) {
return cache[path]
}
if (!slices) {
// path/to/a.js
// ['path', 'to', 'a.js']
slices = path.split(SLASH).filter(Boolean)
}
slices.pop()
// If the path has no parent directory, just test it
if (!slices.length) {
return cache[path] = this._rules.test(path, checkUnignored, MODE_IGNORE)
}
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._rules.test(path, checkUnignored, MODE_IGNORE)
}
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 isPathValid = path =>
checkPath(path && checkPath.convert(path), path, RETURN_FALSE)
// Windows
// --------------------------------------------------------------
/* istanbul ignore next */
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 REGEX_TEST_WINDOWS_PATH_ABSOLUTE = /^[a-z]:\//i
checkPath.isNotRelative = path =>
REGEX_TEST_WINDOWS_PATH_ABSOLUTE.test(path)
|| isNotRelative(path)
}
// COMMONJS_EXPORTS ////////////////////////////////////////////////////////////
module.exports = factory
// Although it is an anti-pattern,
// it is still widely misused by a lot of libraries in github
// Ref: https://github.com/search?q=ignore.default%28%29&type=code
factory.default = factory
module.exports.isPathValid = isPathValid