47 lines
1.5 KiB
TypeScript
47 lines
1.5 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
|
|
// This module is browser compatible.
|
|
|
|
import {
|
|
assertArgs,
|
|
lastPathSegment,
|
|
stripSuffix,
|
|
} from "../_common/basename.ts";
|
|
import { CHAR_COLON } from "../_common/constants.ts";
|
|
import { stripTrailingSeparators } from "../_common/strip_trailing_separators.ts";
|
|
import { isPathSeparator, isWindowsDeviceRoot } from "./_util.ts";
|
|
|
|
/**
|
|
* Return the last portion of a `path`.
|
|
* Trailing directory separators are ignored, and optional suffix is removed.
|
|
*
|
|
* @example
|
|
* ```ts
|
|
* import { basename } from "@std/path/basename";
|
|
*
|
|
* basename("C:\\user\\Documents\\"); // "Documents"
|
|
* basename("C:\\user\\Documents\\image.png"); // "image.png"
|
|
* basename("C:\\user\\Documents\\image.png", ".png"); // "image"
|
|
* ```
|
|
*
|
|
* @param path - path to extract the name from.
|
|
* @param [suffix] - suffix to remove from extracted name.
|
|
*/
|
|
export function basename(path: string, suffix = ""): string {
|
|
assertArgs(path, suffix);
|
|
|
|
// Check for a drive letter prefix so as not to mistake the following
|
|
// path separator as an extra separator at the end of the path that can be
|
|
// disregarded
|
|
let start = 0;
|
|
if (path.length >= 2) {
|
|
const drive = path.charCodeAt(0);
|
|
if (isWindowsDeviceRoot(drive)) {
|
|
if (path.charCodeAt(1) === CHAR_COLON) start = 2;
|
|
}
|
|
}
|
|
|
|
const lastSegment = lastPathSegment(path, isPathSeparator, start);
|
|
const strippedSegment = stripTrailingSeparators(lastSegment, isPathSeparator);
|
|
return suffix ? stripSuffix(strippedSegment, suffix) : strippedSegment;
|
|
}
|