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irreligious/node_modules/ignore/index.js

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2021-09-04 22:21:14 -05:00
// A simple implementation of make-array
function make_array (subject) {
return Array.isArray(subject)
? subject
: [subject]
}
const REGEX_BLANK_LINE = /^\s+$/
const REGEX_LEADING_EXCAPED_EXCLAMATION = /^\\!/
const REGEX_LEADING_EXCAPED_HASH = /^\\#/
const SLASH = '/'
const KEY_IGNORE = typeof Symbol !== 'undefined'
? Symbol.for('node-ignore')
/* istanbul ignore next */
: 'node-ignore'
const define = (object, key, value) =>
Object.defineProperty(object, key, {value})
const REGEX_REGEXP_RANGE = /([0-z])-([0-z])/g
// Sanitize the range of a regular expression
// The cases are complicated, see test cases for details
const sanitizeRange = range => range.replace(
REGEX_REGEXP_RANGE,
(match, from, to) => from.charCodeAt(0) <= to.charCodeAt(0)
? match
// Invalid range (out of order) which is ok for gitignore rules but
// fatal for JavaScript regular expression, so eliminate it.
: ''
)
// > If the pattern ends with a slash,
// > it is removed for the purpose of the following description,
// > but it would only find a match with a directory.
// > In other words, foo/ will match a directory foo and paths underneath it,
// > but will not match a regular file or a symbolic link foo
// > (this is consistent with the way how pathspec works in general in Git).
// '`foo/`' will not match regular file '`foo`' or symbolic link '`foo`'
// -> ignore-rules will not deal with it, because it costs extra `fs.stat` call
// you could use option `mark: true` with `glob`
// '`foo/`' should not continue with the '`..`'
const DEFAULT_REPLACER_PREFIX = [
// > Trailing spaces are ignored unless they are quoted with backslash ("\")
[
// (a\ ) -> (a )
// (a ) -> (a)
// (a \ ) -> (a )
/\\?\s+$/,
match => match.indexOf('\\') === 0
? ' '
: ''
],
// replace (\ ) with ' '
[
/\\\s/g,
() => ' '
],
// 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}`
],
[
// > [abc] matches any character inside the brackets
// > (in this case a, b, or c);
/\[([^\]/]*)($|\])/g,
(match, p1, p2) => p2 === ']'
? `[${sanitizeRange(p1)}]`
: `\\${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'
() => '^(?:.*\\/)?'
]
]
const DEFAULT_REPLACER_SUFFIX = [
// 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 () {
return !/\/(?!$)/.test(this)
// > If the pattern does not contain a slash /,
// > Git treats it as a shell glob pattern
// Actually, if there is only a trailing slash,
// git also treats it as a shell glob pattern
? '(?:^|\\/)'
// > Otherwise, Git treats the pattern as a shell glob suitable for
// > consumption by fnmatch(3)
: '^'
}
],
// two globstars
[
// Use lookahead assertions so that we could match more than one `'/**'`
/\\\/\\\*\\\*(?=\\\/|$)/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 `'/**'`
(match, 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'
(match, p1) => `${p1}[^\\/]*`
],
// trailing wildcard
[
/(\^|\\\/)?\\\*$/,
(match, p1) => {
const prefix = p1
// '\^':
// '/*' does not match ''
// '/*' does not match everything
// '\\\/':
// 'abc/*' does not match 'abc/'
? `${p1}[^/]+`
// 'a*' matches 'a'
// 'a*' matches 'aa'
: '[^/]*'
return `${prefix}(?=$|\\/$)`
}
],
[
// unescape
/\\\\\\/g,
() => '\\'
]
]
const POSITIVE_REPLACERS = [
...DEFAULT_REPLACER_PREFIX,
// 'f'
// matches
// - /f(end)
// - /f/
// - (start)f(end)
// - (start)f/
// doesn't match
// - oof
// - foo
// pseudo:
// -> (^|/)f(/|$)
// ending
[
// 'js' will not match 'js.'
// 'ab' will not match 'abc'
/(?:[^*/])$/,
// 'js*' will not match 'a.js'
// 'js/' will not match 'a.js'
// 'js' will match 'a.js' and 'a.js/'
match => `${match}(?=$|\\/)`
],
...DEFAULT_REPLACER_SUFFIX
]
const NEGATIVE_REPLACERS = [
...DEFAULT_REPLACER_PREFIX,
// #24, #38
// The MISSING rule of [gitignore docs](https://git-scm.com/docs/gitignore)
// A negative pattern without a trailing wildcard should not
// re-include the things inside that directory.
// eg:
// ['node_modules/*', '!node_modules']
// should ignore `node_modules/a.js`
[
/(?:[^*])$/,
match => `${match}(?=$|\\/$)`
],
...DEFAULT_REPLACER_SUFFIX
]
// A simple cache, because an ignore rule only has only one certain meaning
const cache = Object.create(null)
// @param {pattern}
const make_regex = (pattern, negative, ignorecase) => {
const r = cache[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 cache[pattern] = ignorecase
? new RegExp(source, 'i')
: new RegExp(source)
}
// > A blank line matches no files, so it can serve as a separator for readability.
const checkPattern = pattern => pattern
&& typeof pattern === 'string'
&& !REGEX_BLANK_LINE.test(pattern)
// > A line starting with # serves as a comment.
&& pattern.indexOf('#') !== 0
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_LEADING_EXCAPED_EXCLAMATION, '!')
// > Put a backslash ("\") in front of the first hash for patterns that
// > begin with a hash.
.replace(REGEX_LEADING_EXCAPED_HASH, '#')
const regex = make_regex(pattern, negative, ignorecase)
return {
origin,
pattern,
negative,
regex
}
}
class IgnoreBase {
constructor ({
ignorecase = true
} = {}) {
this._rules = []
this._ignorecase = ignorecase
define(this, KEY_IGNORE, true)
this._initCache()
}
_initCache () {
this._cache = Object.create(null)
}
// @param {Array.<string>|string|Ignore} pattern
add (pattern) {
this._added = false
if (typeof pattern === 'string') {
pattern = pattern.split(/\r?\n/g)
}
make_array(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)
}
_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)
}
}
filter (paths) {
return make_array(paths).filter(path => this._filter(path))
}
createFilter () {
return path => this._filter(path)
}
ignores (path) {
return !this._filter(path)
}
// @returns `Boolean` true if the `path` is NOT ignored
_filter (path, slices) {
if (!path) {
return false
}
if (path in this._cache) {
return this._cache[path]
}
if (!slices) {
// path/to/a.js
// ['path', 'to', 'a.js']
slices = path.split(SLASH)
}
slices.pop()
return this._cache[path] = slices.length
// > It is not possible to re-include a file if a parent directory of
// > that file is excluded.
// If the path contains a parent directory, check the parent first
? this._filter(slices.join(SLASH) + SLASH, slices)
&& this._test(path)
// Or only test the path
: this._test(path)
}
// @returns {Boolean} true if a file is NOT ignored
_test (path) {
// Explicitly define variable type by setting matched to `0`
let matched = 0
this._rules.forEach(rule => {
// if matched = true, then we only test negative rules
// if matched = false, then we test non-negative rules
if (!(matched ^ rule.negative)) {
matched = rule.negative ^ rule.regex.test(path)
}
})
return !matched
}
}
// 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'
)
) {
const filter = IgnoreBase.prototype._filter
/* eslint no-control-regex: "off" */
const make_posix = str => /^\\\\\?\\/.test(str)
|| /[^\x00-\x80]+/.test(str)
? str
: str.replace(/\\/g, '/')
IgnoreBase.prototype._filter = function filterWin32 (path, slices) {
path = make_posix(path)
return filter.call(this, path, slices)
}
}
module.exports = options => new IgnoreBase(options)