20 lines
1.0 KiB
TypeScript
20 lines
1.0 KiB
TypeScript
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import { realpath } from "node:fs/promises";
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import path from "node:path";
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/** Registration may name the workbench through its guest alias. Only that
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* outer alias is permitted: resources and each checkout remain physical,
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* directly contained directories. Persist the resulting root-relative path.
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*/
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export async function managedResourcePath(workbench: string, directory: string): Promise<string> {
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const root = await realpath(workbench);
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const selected = path.resolve(root, directory);
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const name = path.basename(selected);
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const resources = path.dirname(selected);
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if (path.basename(resources) !== "resources" || !/^[A-Za-z0-9][A-Za-z0-9._-]*$/.test(name))
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throw new Error(`Repository is outside the managed workbench: ${directory}`);
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const relative = `resources/${name}`;
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if ((await realpath(path.dirname(resources))) !== root || (await realpath(selected)) !== path.join(root, relative))
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throw new Error(`Managed repository path crosses a symlink or escapes the workbench: ${directory}`);
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return relative;
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}
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