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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 { NodearchiveError } from '../../.errors/class.js'
import type { ArchiveManifest } from '../../.types/ArchiveManifest/type.js'
import { readGzipArchive } from '../readGzipArchive/index.js'
import { readTarArchive } from '../readTarArchive/index.js'
import { readZipArchive } from '../readZipArchive/index.js'
export async function readForeignArchive(
bytes: Uint8Array,
sourcePath?: string
): Promise<ArchiveManifest> {
if (looksLikeZip(bytes)) {
return readZipArchive(bytes)
}
if (looksLikeGzip(bytes)) {
return readGzipArchive(bytes, sourcePath)
}
if (looksLikeTar(bytes)) {
return readTarArchive(bytes)
}
throw new NodearchiveError(
'ARCHIVE_INVALID_FORMAT',
'Unsupported archive format'
)
}
function looksLikeZip(bytes: Uint8Array): boolean {
return (
bytes.length >= 4 &&
bytes[0] === 0x50 &&
bytes[1] === 0x4b &&
(bytes[2] === 0x03 || bytes[2] === 0x05 || bytes[2] === 0x07) &&
(bytes[3] === 0x04 || bytes[3] === 0x06 || bytes[3] === 0x08)
)
}
function looksLikeGzip(bytes: Uint8Array): boolean {
return bytes.length >= 2 && bytes[0] === 0x1f && bytes[1] === 0x8b
}
function looksLikeTar(bytes: Uint8Array): boolean {
return (
bytes.length >= 262 &&
Buffer.from(bytes.subarray(257, 262)).toString('utf8') === 'ustar'
)
}
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