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31 lines
1 KiB
TypeScript
31 lines
1 KiB
TypeScript
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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import { assertArg } from "../_common/normalize.ts";
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import { normalizeString } from "../_common/normalize_string.ts";
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import { isPosixPathSeparator } from "./_util.ts";
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/**
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* Normalize the `path`, resolving `'..'` and `'.'` segments.
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* Note that resolving these segments does not necessarily mean that all will be eliminated.
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* A `'..'` at the top-level will be preserved, and an empty path is canonically `'.'`.
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* @param path to be normalized
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*/
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export function normalize(path: string): string {
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assertArg(path);
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const isAbsolute = isPosixPathSeparator(path.charCodeAt(0));
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const trailingSeparator = isPosixPathSeparator(
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path.charCodeAt(path.length - 1),
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);
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// Normalize the path
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path = normalizeString(path, !isAbsolute, "/", isPosixPathSeparator);
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if (path.length === 0 && !isAbsolute) path = ".";
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if (path.length > 0 && trailingSeparator) path += "/";
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if (isAbsolute) return `/${path}`;
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return path;
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}
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