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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 { chmod, lstat, mkdir, writeFile } from 'node:fs/promises'
import path from 'node:path'
import type { ArchiveManifest } from '../../.types/ArchiveManifest/type.js'
import { NodearchiveError } from '../../.errors/class.js'
import { assertDirectoryPath } from '../../.helpers/assertDirectoryPath/index.js'
import { toNodearchiveError } from '../../.helpers/toNodearchiveError/index.js'
export async function materializeArchive(
manifest: ArchiveManifest,
destinationPath: string,
force = false,
dryRun = false
): Promise<void> {
const root = path.resolve(destinationPath)
await assertDirectoryPath(root)
if (!dryRun) {
await ensureDirectory(root)
}
for (const entry of manifest.entries) {
const safePath = toSafePath(entry.path)
const target = path.join(root, ...safePath.split('/'))
if (entry.kind === 'directory') {
await assertDirectoryPath(target)
if (!dryRun) {
await ensureDirectory(target)
await applyMode(target, entry.mode)
}
continue
}
await assertDirectoryPath(path.dirname(target))
const existingType = await readPathType(target)
if (existingType === 'directory') {
throw new NodearchiveError(
'ARCHIVE_FILESYSTEM_WRITE_FAILED',
`Failed to write file: ${target}`
)
}
if (dryRun) {
if (existingType !== undefined && !force) {
throw new NodearchiveError(
'ARCHIVE_DESTINATION_EXISTS',
`Destination already exists: ${target}`
)
}
continue
}
await ensureDirectory(path.dirname(target))
try {
await writeFile(target, Buffer.from(entry.data!, 'base64'), {
flag: force ? 'w' : 'wx',
})
} catch (error) {
if ((error as NodeJS.ErrnoException).code === 'EEXIST') {
throw new NodearchiveError(
'ARCHIVE_DESTINATION_EXISTS',
`Destination already exists: ${target}`,
{ cause: error }
)
}
throw toNodearchiveError(
error,
'ARCHIVE_FILESYSTEM_WRITE_FAILED',
`Failed to write file: ${target}`
)
}
await applyMode(target, entry.mode)
}
}
async function applyMode(target: string, mode?: number): Promise<void> {
if (mode === undefined) {
return
}
await chmod(target, mode)
}
async function ensureDirectory(target: string): Promise<void> {
await mkdir(target, { recursive: true })
}
async function readPathType(
target: string
): Promise<'directory' | 'file' | undefined> {
try {
const stats = await lstat(target)
return stats.isDirectory() ? 'directory' : 'file'
} catch (error) {
if ((error as NodeJS.ErrnoException).code === 'ENOENT') {
return undefined
}
throw error
}
}
function toSafePath(value: string): string {
const normalized = path.posix.normalize(value)
if (
normalized === '.' ||
normalized.startsWith('../') ||
normalized.startsWith('/') ||
/^[A-Za-z]:/.test(normalized)
) {
throw new NodearchiveError(
'ARCHIVE_ENTRY_PATH_INVALID',
`Archive entry path is not safe to extract: ${value}`
)
}
return normalized
}
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