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std/path/posix/normalize.ts

Deno standard library
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import { assertArg } from "../_common/normalize.ts";import { normalizeString } from "../_common/normalize_string.ts";import { isPosixPathSeparator } from "./_util.ts";
/** * Normalize the `path`, resolving `'..'` and `'.'` segments. * Note that resolving these segments does not necessarily mean that all will be eliminated. * A `'..'` at the top-level will be preserved, and an empty path is canonically `'.'`. * @param path to be normalized */export function normalize(path: string): string { assertArg(path);
const isAbsolute = isPosixPathSeparator(path.charCodeAt(0)); const trailingSeparator = isPosixPathSeparator( path.charCodeAt(path.length - 1), );
// Normalize the path path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
if (path.length === 0 && !isAbsolute) path = "."; if (path.length > 0 && trailingSeparator) path += "/";
if (isAbsolute) return `/${path}`; return path;}