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* Copyright 2026 nodearchive
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { readFile } from 'node:fs/promises'
import type { ArchiveManifest } from '../../.types/ArchiveManifest/type.js'
import { readArchive } from '../../.helpers/readArchive/index.js'
import { toNodearchiveError } from '../../.helpers/toNodearchiveError/index.js'
export async function readExistingArchive(
destinationPath: string
): Promise<ArchiveManifest | undefined> {
try {
const bytes = await readFile(destinationPath)
return readArchive(bytes)
} catch (error) {
if ((error as NodeJS.ErrnoException).code === 'ENOENT') {
return undefined
}
throw toNodearchiveError(
error,
'ARCHIVE_FILESYSTEM_READ_FAILED',
`Failed to read existing archive: ${destinationPath}`
)
}
}
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