AlkantarClanX12
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// this is just a very light wrapper around 2 arrays with an offset index
import { GLOBSTAR } from 'minimatch';
const isPatternList = (pl) => pl.length >= 1;
const isGlobList = (gl) => gl.length >= 1;
/**
* An immutable-ish view on an array of glob parts and their parsed
* results
*/
export class Pattern {
#patternList;
#globList;
#index;
length;
#platform;
#rest;
#globString;
#isDrive;
#isUNC;
#isAbsolute;
#followGlobstar = true;
constructor(patternList, globList, index, platform) {
if (!isPatternList(patternList)) {
throw new TypeError('empty pattern list');
}
if (!isGlobList(globList)) {
throw new TypeError('empty glob list');
}
if (globList.length !== patternList.length) {
throw new TypeError('mismatched pattern list and glob list lengths');
}
this.length = patternList.length;
if (index < 0 || index >= this.length) {
throw new TypeError('index out of range');
}
this.#patternList = patternList;
this.#globList = globList;
this.#index = index;
this.#platform = platform;
// normalize root entries of absolute patterns on initial creation.
if (this.#index === 0) {
// c: => ['c:/']
// C:/ => ['C:/']
// C:/x => ['C:/', 'x']
// //host/share => ['//host/share/']
// //host/share/ => ['//host/share/']
// //host/share/x => ['//host/share/', 'x']
// /etc => ['/', 'etc']
// / => ['/']
if (this.isUNC()) {
// '' / '' / 'host' / 'share'
const [p0, p1, p2, p3, ...prest] = this.#patternList;
const [g0, g1, g2, g3, ...grest] = this.#globList;
if (prest[0] === '') {
// ends in /
prest.shift();
grest.shift();
}
const p = [p0, p1, p2, p3, ''].join('/');
const g = [g0, g1, g2, g3, ''].join('/');
this.#patternList = [p, ...prest];
this.#globList = [g, ...grest];
this.length = this.#patternList.length;
}
else if (this.isDrive() || this.isAbsolute()) {
const [p1, ...prest] = this.#patternList;
const [g1, ...grest] = this.#globList;
if (prest[0] === '') {
// ends in /
prest.shift();
grest.shift();
}
const p = p1 + '/';
const g = g1 + '/';
this.#patternList = [p, ...prest];
this.#globList = [g, ...grest];
this.length = this.#patternList.length;
}
}
}
/**
* The first entry in the parsed list of patterns
*/
pattern() {
return this.#patternList[this.#index];
}
/**
* true of if pattern() returns a string
*/
isString() {
return typeof this.#patternList[this.#index] === 'string';
}
/**
* true of if pattern() returns GLOBSTAR
*/
isGlobstar() {
return this.#patternList[this.#index] === GLOBSTAR;
}
/**
* true if pattern() returns a regexp
*/
isRegExp() {
return this.#patternList[this.#index] instanceof RegExp;
}
/**
* The /-joined set of glob parts that make up this pattern
*/
globString() {
return (this.#globString =
this.#globString ||
(this.#index === 0 ?
this.isAbsolute() ?
this.#globList[0] + this.#globList.slice(1).join('/')
: this.#globList.join('/')
: this.#globList.slice(this.#index).join('/')));
}
/**
* true if there are more pattern parts after this one
*/
hasMore() {
return this.length > this.#index + 1;
}
/**
* The rest of the pattern after this part, or null if this is the end
*/
rest() {
if (this.#rest !== undefined)
return this.#rest;
if (!this.hasMore())
return (this.#rest = null);
this.#rest = new Pattern(this.#patternList, this.#globList, this.#index + 1, this.#platform);
this.#rest.#isAbsolute = this.#isAbsolute;
this.#rest.#isUNC = this.#isUNC;
this.#rest.#isDrive = this.#isDrive;
return this.#rest;
}
/**
* true if the pattern represents a //unc/path/ on windows
*/
isUNC() {
const pl = this.#patternList;
return this.#isUNC !== undefined ?
this.#isUNC
: (this.#isUNC =
this.#platform === 'win32' &&
this.#index === 0 &&
pl[0] === '' &&
pl[1] === '' &&
typeof pl[2] === 'string' &&
!!pl[2] &&
typeof pl[3] === 'string' &&
!!pl[3]);
}
// pattern like C:/...
// split = ['C:', ...]
// XXX: would be nice to handle patterns like `c:*` to test the cwd
// in c: for *, but I don't know of a way to even figure out what that
// cwd is without actually chdir'ing into it?
/**
* True if the pattern starts with a drive letter on Windows
*/
isDrive() {
const pl = this.#patternList;
return this.#isDrive !== undefined ?
this.#isDrive
: (this.#isDrive =
this.#platform === 'win32' &&
this.#index === 0 &&
this.length > 1 &&
typeof pl[0] === 'string' &&
/^[a-z]:$/i.test(pl[0]));
}
// pattern = '/' or '/...' or '/x/...'
// split = ['', ''] or ['', ...] or ['', 'x', ...]
// Drive and UNC both considered absolute on windows
/**
* True if the pattern is rooted on an absolute path
*/
isAbsolute() {
const pl = this.#patternList;
return this.#isAbsolute !== undefined ?
this.#isAbsolute
: (this.#isAbsolute =
(pl[0] === '' && pl.length > 1) ||
this.isDrive() ||
this.isUNC());
}
/**
* consume the root of the pattern, and return it
*/
root() {
const p = this.#patternList[0];
return (typeof p === 'string' && this.isAbsolute() && this.#index === 0) ?
p
: '';
}
/**
* Check to see if the current globstar pattern is allowed to follow
* a symbolic link.
*/
checkFollowGlobstar() {
return !(this.#index === 0 ||
!this.isGlobstar() ||
!this.#followGlobstar);
}
/**
* Mark that the current globstar pattern is following a symbolic link
*/
markFollowGlobstar() {
if (this.#index === 0 || !this.isGlobstar() || !this.#followGlobstar)
return false;
this.#followGlobstar = false;
return true;
}
}
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