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d47147fb6a
This commit moves "deno_std/node" in "ext/node" crate. The code is transpiled and snapshotted during the build process. During the first pass a minimal amount of work was done to create the snapshot, a lot of code in "ext/node" depends on presence of "Deno" global. This code will be gradually fixed in the follow up PRs to migrate it to import relevant APIs from "internal:" modules. Currently the code from snapshot is not used in any way, and all Node/npm compatibility still uses code from "https://deno.land/std/node" (or from the location specified by "DENO_NODE_COMPAT_URL"). This will also be handled in a follow up PRs. --------- Co-authored-by: crowlkats <crowlkats@toaxl.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com> Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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import { SEP } from "internal:deno_node/polyfills/path/separator.ts";
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/** Determines the common path from a set of paths, using an optional separator,
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* which defaults to the OS default separator.
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*
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* ```ts
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* const p = common([
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* "./deno/std/path/mod.ts",
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* "./deno/std/fs/mod.ts",
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* ]);
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* console.log(p); // "./deno/std/"
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* ```
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*/
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export function common(paths: string[], sep = SEP): string {
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const [first = "", ...remaining] = paths;
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if (first === "" || remaining.length === 0) {
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return first.substring(0, first.lastIndexOf(sep) + 1);
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}
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const parts = first.split(sep);
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let endOfPrefix = parts.length;
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for (const path of remaining) {
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const compare = path.split(sep);
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for (let i = 0; i < endOfPrefix; i++) {
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if (compare[i] !== parts[i]) {
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endOfPrefix = i;
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}
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}
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if (endOfPrefix === 0) {
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return "";
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}
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}
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const prefix = parts.slice(0, endOfPrefix).join(sep);
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return prefix.endsWith(sep) ? prefix : `${prefix}${sep}`;
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}
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