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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 { lstat, mkdir, writeFile } from 'node:fs/promises'
import path from 'node:path'
import { NodearchiveError } from '../../.errors/class.js'
import { assertDirectoryPath } from '../../.helpers/assertDirectoryPath/index.js'
import { toNodearchiveError } from '../../.helpers/toNodearchiveError/index.js'
export async function writeArchiveFile(
destinationPath: string,
bytes: Uint8Array,
overwrite: boolean,
dryRun = false
): Promise<void> {
const absoluteDestination = path.resolve(destinationPath)
try {
await assertDirectoryPath(path.dirname(absoluteDestination))
const existingType = await readPathType(absoluteDestination)
if (existingType === 'directory') {
throw new NodearchiveError(
'ARCHIVE_FILESYSTEM_WRITE_FAILED',
`Failed to write archive: ${absoluteDestination}`
)
}
if (dryRun) {
if (existingType !== undefined && !overwrite) {
throw new NodearchiveError(
'ARCHIVE_DESTINATION_EXISTS',
`Destination already exists: ${absoluteDestination}`
)
}
return
}
await mkdir(path.dirname(absoluteDestination), { recursive: true })
await writeFile(absoluteDestination, bytes, {
flag: overwrite ? 'w' : 'wx',
})
} catch (error) {
if ((error as NodeJS.ErrnoException).code === 'EEXIST') {
throw new NodearchiveError(
'ARCHIVE_DESTINATION_EXISTS',
`Destination already exists: ${absoluteDestination}`,
{ cause: error }
)
}
throw toNodearchiveError(
error,
'ARCHIVE_FILESYSTEM_WRITE_FAILED',
`Failed to write archive: ${absoluteDestination}`
)
}
}
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
}
}
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