Add string[] option to submodules

Allows checking out only specific submodules instead of all

src/git-command-manager.ts

@@ -54,7 +54,11 @@ export interface IGitCommandManager {
   shaExists(sha: string): Promise<boolean>
   submoduleForeach(command: string, recursive: boolean): Promise<string>
   submoduleSync(recursive: boolean): Promise<void>
-  submoduleUpdate(fetchDepth: number, recursive: boolean): Promise<void>
+  submoduleUpdate(
+    fetchDepth: number,
+    recursive: boolean,
+    submoduleDirectories: string[] | null
+  ): Promise<void>
   submoduleStatus(): Promise<boolean>
   tagExists(pattern: string): Promise<boolean>
   tryClean(): Promise<boolean>
@@ -409,18 +413,38 @@ class GitCommandManager {
     await this.execGit(args)
   }
 
-  async submoduleUpdate(fetchDepth: number, recursive: boolean): Promise<void> {
-    const args = ['-c', 'protocol.version=2']
-    args.push('submodule', 'update', '--init', '--force')
-    if (fetchDepth > 0) {
-      args.push(`--depth=${fetchDepth}`)
-    }
+  async submoduleUpdate(
+    fetchDepth: number,
+    recursive: boolean,
+    submoduleDirectories: string[] | null
+  ): Promise<void> {
+    if (submoduleDirectories) {
+      for (const submodule of submoduleDirectories) {
+        const args = ['-c', 'protocol.version=2']
+        args.push('submodule', 'update', '--init', '--force', submodule)
+        if (fetchDepth > 0) {
+          args.push(`--depth=${fetchDepth}`)
+        }
 
-    if (recursive) {
-      args.push('--recursive')
-    }
+        if (recursive) {
+          args.push('--recursive')
+        }
 
-    await this.execGit(args)
+        await this.execGit(args)
+      }
+    } else {
+      const args = ['-c', 'protocol.version=2']
+      args.push('submodule', 'update', '--init', '--force')
+      if (fetchDepth > 0) {
+        args.push(`--depth=${fetchDepth}`)
+      }
+
+      if (recursive) {
+        args.push('--recursive')
+      }
+
+      await this.execGit(args)
+    }
   }
 
   async submoduleStatus(): Promise<boolean> {