keep-a-changelog
Version:
Node package to parse and generate changelogs following the [keepachangelog](https://keepachangelog.com/) format.
63 lines (62 loc) • 2.15 kB
JavaScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
import { assertArg } from "../_common/dirname.js";
import { stripTrailingSeparators } from "../_common/strip_trailing_separators.js";
import { isPosixPathSeparator } from "./_util.js";
/**
* Return the directory path of a `path`.
*
* @example Usage
* ```ts
* import { dirname } from "@std/path/posix/dirname";
* import { assertEquals } from "@std/assert";
*
* assertEquals(dirname("/home/user/Documents/"), "/home/user");
* assertEquals(dirname("/home/user/Documents/image.png"), "/home/user/Documents");
* assertEquals(dirname("https://deno.land/std/path/mod.ts"), "https://deno.land/std/path");
* ```
*
* @example Working with URLs
*
* ```ts
* import { dirname } from "@std/path/posix/dirname";
* import { assertEquals } from "@std/assert";
*
* assertEquals(dirname("https://deno.land/std/path/mod.ts"), "https://deno.land/std/path");
* assertEquals(dirname("https://deno.land/std/path/mod.ts?a=b"), "https://deno.land/std/path");
* assertEquals(dirname("https://deno.land/std/path/mod.ts#header"), "https://deno.land/std/path");
* ```
*
* Note: If you are working with file URLs,
* use the new version of `dirname` from `@std/path/posix/unstable-dirname`.
*
* @param path The path to get the directory from.
* @returns The directory path.
*/
export function dirname(path) {
assertArg(path);
let end = -1;
let matchedNonSeparator = false;
for (let i = path.length - 1; i >= 1; --i) {
if (isPosixPathSeparator(path.charCodeAt(i))) {
if (matchedNonSeparator) {
end = i;
break;
}
}
else {
matchedNonSeparator = true;
}
}
// No matches. Fallback based on provided path:
//
// - leading slashes paths
// "/foo" => "/"
// "///foo" => "/"
// - no slash path
// "foo" => "."
if (end === -1) {
return isPosixPathSeparator(path.charCodeAt(0)) ? "/" : ".";
}
return stripTrailingSeparators(path.slice(0, end), isPosixPathSeparator);
}