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Copyright 2012-2015, Yahoo Inc.
Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
*/
import path from "node:path";
type PathParser = (path: string) => path.ParsedPath;
let parsePath: PathParser = path.parse;
let SEP: string = path.sep;
const origParser = parsePath;
const origSep = SEP;
function makeRelativeNormalizedPath(str: string, sep: string): string[] {
const parsed = parsePath(str);
let root = parsed.root;
let dir: string | string[];
let file = parsed.base;
let quoted: RegExp;
let pos: number;
// handle a weird windows case separately
if (sep === "\\") {
pos = root.indexOf(":\\");
if (pos >= 0) {
root = root.substring(0, pos + 2);
}
}
dir = parsed.dir.substring(root.length);
if (str === "") {
return [];
}
if (sep !== "/") {
quoted = new RegExp(sep.replace(/\W/g, "\\$&"), "g");
dir = dir.replace(quoted, "/");
file = file.replace(quoted, "/"); // excessively paranoid?
}
if (dir !== "") {
dir = `${dir}/${file}`;
} else {
dir = file;
}
if (dir.substring(0, 1) === "/") {
dir = dir.substring(1);
}
dir = dir.split(/\/+/);
return dir;
}
class Path {
declare v: string[];
declare readonly length: number;
declare push: (...items: string[]) => number;
declare pop: () => string | undefined;
declare shift: () => string | undefined;
declare unshift: (...items: string[]) => number;
declare splice: (start: number, deleteCount?: number, ...items: string[]) => string[];
constructor(strOrArray: string | string[]) {
if (Array.isArray(strOrArray)) {
this.v = strOrArray;
} else if (typeof strOrArray === "string") {
this.v = makeRelativeNormalizedPath(strOrArray, SEP);
} else {
throw new Error(`Invalid Path argument must be string or array:${strOrArray}`);
}
}
toString(): string {
return this.v.join("/");
}
hasParent(): boolean {
return this.v.length > 0;
}
parent(): Path {
if (!this.hasParent()) {
throw new Error("Unable to get parent for 0 elem path");
}
const p = this.v.slice();
p.pop();
return new Path(p);
}
elements(): string[] {
return this.v.slice();
}
name(): string {
return this.v.slice(-1)[0];
}
contains(other: Path): boolean {
let i;
if (other.length > this.length) {
return false;
}
for (i = 0; i < other.length; i += 1) {
if (this.v[i] !== other.v[i]) {
return false;
}
}
return true;
}
ancestorOf(other: Path): boolean {
return other.contains(this) && other.length !== this.length;
}
descendantOf(other: Path): boolean {
return this.contains(other) && other.length !== this.length;
}
commonPrefixPath(other: Path): Path {
const len = this.length > other.length ? other.length : this.length;
let i;
const ret = [];
for (i = 0; i < len; i += 1) {
if (this.v[i] === other.v[i]) {
ret.push(this.v[i]);
} else {
break;
}
}
return new Path(ret);
}
static compare(a: Path, b: Path): number {
const al = a.length;
const bl = b.length;
if (al < bl) {
return -1;
}
if (al > bl) {
return 1;
}
const astr = a.toString();
const bstr = b.toString();
return astr < bstr ? -1 : astr > bstr ? 1 : 0;
}
static tester = {
setParserAndSep(p: PathParser, sep: string) {
parsePath = p;
SEP = sep;
},
reset() {
parsePath = origParser;
SEP = origSep;
},
};
}
(["push", "pop", "shift", "unshift", "splice"] as const).forEach((fn) => {
Object.defineProperty(Path.prototype, fn, {
value(this: Path, ...args: unknown[]) {
return (this.v[fn] as (...args: unknown[]) => unknown).apply(this.v, args);
},
});
});
Object.defineProperty(Path.prototype, "length", {
enumerable: true,
get(this: Path) {
return this.v.length;
},
});
export default Path;
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