feat: export options to importer

Author: clostao

packages/ipfs-unixfs-importer/src/dag-builder/dir.ts

@@ -13,6 +13,14 @@ export interface DirBuilderOptions {
   signal?: AbortSignal
 }
 
+export interface DirBuilder {
+  (
+    dir: Directory,
+    blockstore: WritableStorage,
+    options: DirBuilderOptions
+  ): Promise<InProgressImportResult>
+}
+
 export const defaultDirBuilder = async (
   dir: Directory,
   blockstore: WritableStorage,

packages/ipfs-unixfs-importer/src/dag-builder/file.ts

@@ -232,6 +232,14 @@ const reduce = (
   return reducer
 }
 
+export interface FileBuilder {
+  (
+    file: File,
+    blockstore: WritableStorage,
+    options: FileBuilderOptions
+  ): Promise<InProgressImportResult>
+}
+
 export interface FileBuilderOptions
   extends BuildFileBatchOptions,
   ReduceOptions {

packages/ipfs-unixfs-importer/src/dag-builder/index.ts

@@ -1,7 +1,7 @@
 import errCode from 'err-code'
 import { CustomProgressEvent } from 'progress-events'
-import { defaultDirBuilder, type DirBuilderOptions } from './dir.js'
-import { defaultFileBuilder, type FileBuilderOptions } from './file.js'
+import { defaultDirBuilder, type DirBuilder, type DirBuilderOptions } from './dir.js'
+import { defaultFileBuilder, type FileBuilder, type FileBuilderOptions } from './file.js'
 import type { ChunkValidator } from './validate-chunks.js'
 import type { Chunker } from '../chunker/index.js'
 import type {
@@ -77,16 +77,8 @@ export interface DagBuilderOptions
   chunker: Chunker
   chunkValidator: ChunkValidator
   wrapWithDirectory: boolean
-  dirBuilder?(
-    dir: Directory,
-    blockstore: WritableStorage,
-    options: DirBuilderOptions
-  ): Promise<InProgressImportResult>
-  fileBuilder?(
-    file: File,
-    blockstore: WritableStorage,
-    options: FileBuilderOptions
-  ): Promise<InProgressImportResult>
+  dirBuilder?: DirBuilder
+  fileBuilder?: FileBuilder
 }
 
 export type ImporterSourceStream =

packages/ipfs-unixfs-importer/src/index.ts

@@ -72,7 +72,8 @@ import { type ChunkValidator, defaultChunkValidator } from './dag-builder/valida
 import { balanced, type FileLayout } from './layout/index.js'
 import { defaultTreeBuilder } from './tree-builder.js'
 import type { Chunker } from './chunker/index.js'
-import type { ReducerProgressEvents } from './dag-builder/file.js'
+import type { DirBuilder } from './dag-builder/dir.js'
+import type { FileBuilder, ReducerProgressEvents } from './dag-builder/file.js'
 import type { Blockstore } from 'interface-blockstore'
 import type { AwaitIterable } from 'interface-store'
 import type { UnixFS, Mtime } from 'ipfs-unixfs'
@@ -270,6 +271,20 @@ export interface ImporterOptions extends ProgressOptions<ImporterProgressEvents>
    * `Error`
    */
   chunkValidator?: ChunkValidator
+
+  /**
+   * This option can be used to override how a directory IPLD node is built.
+   *
+   * This function takes a `Directory` object and returns a `Promise` that resolves to an `InProgressImportResult`.
+   */
+  dirBuilder?: DirBuilder
+
+  /**
+   * This option can be used to override how a file IPLD node is built.
+   *
+   * This function takes a `File` object and returns a `Promise` that resolves to an `InProgressImportResult`.
+   */
+  fileBuilder?: FileBuilder
 }
 
 export type ImportCandidateStream = AsyncIterable<FileCandidate | DirectoryCandidate> | Iterable<FileCandidate | DirectoryCandidate>
@@ -319,7 +334,7 @@ export async function * importer (source: ImportCandidateStream, blockstore: Wri
   const fileImportConcurrency = options.fileImportConcurrency ?? 50
   const blockWriteConcurrency = options.blockWriteConcurrency ?? 10
   const reduceSingleLeafToSelf = options.reduceSingleLeafToSelf ?? true
-  
+
 
   const chunker = options.chunker ?? fixedSize()
   const chunkValidator = options.chunkValidator ?? defaultChunkValidator()
@@ -337,7 +352,9 @@ export async function * importer (source: ImportCandidateStream, blockstore: Wri
     blockWriteConcurrency,
     reduceSingleLeafToSelf,
     cidVersion,
-    onProgress: options.onProgress
+    onProgress: options.onProgress,
+    dirBuilder: options.dirBuilder,
+    fileBuilder: options.fileBuilder
   })
   const buildTree: TreeBuilder = options.treeBuilder ?? defaultTreeBuilder({
     wrapWithDirectory,