Implemented rebase onto

extensions/git/package.json

@@ -298,6 +298,11 @@
         "title": "%command.merge%",
         "category": "Git"
       },
+      {
+        "command": "git.rebaseOnto",
+        "title": "%command.rebaseOnto%",
+        "category": "Git"
+      },
       {
         "command": "git.createTag",
         "title": "%command.createTag%",
@@ -703,6 +708,10 @@
           "command": "git.merge",
           "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
         },
+        {
+          "command": "git.rebaseOnto",
+          "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
+        },
         {
           "command": "git.createTag",
           "when": "config.git.enabled && !git.missing && gitOpenRepositoryCount != 0"
@@ -1433,6 +1442,9 @@
         {
           "command": "git.merge"
         },
+        {
+          "command": "git.rebaseOnto"
+        },
         {
           "command": "git.branch"
         },

extensions/git/package.nls.json

@@ -50,6 +50,7 @@
 	"command.deleteBranch": "Delete Branch...",
 	"command.renameBranch": "Rename Branch...",
 	"command.merge": "Merge Branch...",
+	"command.rebaseOnto": "Rebase Branch Onto...",
 	"command.createTag": "Create Tag",
 	"command.deleteTag": "Delete Tag",
 	"command.fetch": "Fetch",

extensions/git/src/commands.ts

@@ -99,6 +99,18 @@ class MergeItem implements QuickPickItem {
 	}
 }
 
+class RebaseOntoItem implements QuickPickItem {
+
+	get label(): string { return this.ref.name || ''; }
+	get description(): string { return this.ref.name || ''; }
+
+	constructor(protected ref: Ref) { }
+
+	async run(repository: Repository): Promise<void> {
+		await repository.rebaseOnto(repository.HEAD, this.ref);
+	}
+}
+
 class CreateBranchItem implements QuickPickItem {
 
 	constructor(private cc: CommandCenter) { }
@@ -1848,6 +1860,31 @@ export class CommandCenter {
 		await choice.run(repository);
 	}
 
+	@command('git.rebaseOnto', { repository: true })
+	async rebaseOnto(repository: Repository): Promise<void> {
+		const config = workspace.getConfiguration('git');
+		const checkoutType = config.get<string>('checkoutType') || 'all';
+		const includeRemotes = checkoutType === 'all' || checkoutType === 'remote';
+
+		const heads = repository.refs.filter(ref => ref.type === RefType.Head)
+			.filter(ref => ref.name || ref.commit)
+			.map(ref => new RebaseOntoItem(ref as Branch));
+
+		const remoteHeads = (includeRemotes ? repository.refs.filter(ref => ref.type === RefType.RemoteHead) : [])
+			.filter(ref => ref.name || ref.commit)
+			.map(ref => new RebaseOntoItem(ref as Branch));
+
+		const picks = [...heads, ...remoteHeads];
+		const placeHolder = localize('select a branch to rebase onto', 'Select a branch to rebase onto');
+		const choice = await window.showQuickPick<RebaseOntoItem>(picks, { placeHolder });
+
+		if (!choice) {
+			return;
+		}
+
+		await choice.run(repository);
+	}
+
 	@command('git.createTag', { repository: true })
 	async createTag(repository: Repository): Promise<void> {
 		const inputTagName = await window.showInputBox({

extensions/git/src/git.ts

@@ -1608,6 +1608,24 @@ export class Repository {
 		}
 	}
 
+	async rebase(branch: string, options: PullOptions = {}): Promise<void> {
+		const args = ['rebase'];
+
+		args.push(branch);
+
+		try {
+			await this.run(args, options);
+		} catch (err) {
+			if (/^CONFLICT \([^)]+\): \b/m.test(err.stdout || '')) {
+				err.gitErrorCode = GitErrorCodes.Conflict;
+			} else if (/cannot rebase onto multiple branches/i.test(err.stderr || '')) {
+				err.gitErrorCode = GitErrorCodes.CantRebaseMultipleBranches;
+			}
+
+			throw err;
+		}
+	}
+
 	async push(remote?: string, name?: string, setUpstream: boolean = false, tags = false, forcePushMode?: ForcePushMode): Promise<void> {
 		const args = ['push'];
 

extensions/git/src/repository.ts

@@ -300,6 +300,7 @@ export const enum Operation {
 	RenameBranch = 'RenameBranch',
 	DeleteRef = 'DeleteRef',
 	Merge = 'Merge',
+	Rebase = 'Rebase',
 	Ignore = 'Ignore',
 	Tag = 'Tag',
 	DeleteTag = 'DeleteTag',
@@ -1067,6 +1068,10 @@ export class Repository implements Disposable {
 		await this.run(Operation.Merge, () => this.repository.merge(ref));
 	}
 
+	async rebase(branch: string): Promise<void> {
+		await this.run(Operation.Rebase, () => this.repository.rebase(branch));
+	}
+
 	async tag(name: string, message?: string): Promise<void> {
 		await this.run(Operation.Tag, () => this.repository.tag(name, message));
 	}
@@ -1143,6 +1148,14 @@ export class Repository implements Disposable {
 		return this.pullFrom(true, remote, branch);
 	}
 
+	@throttle
+	async rebaseOnto(head: Branch | undefined, branch: Branch | undefined): Promise<void> {
+		if (head?.name && branch?.name) {
+			await this.checkout(branch.name);
+			await this.rebase(head.name);
+		}
+	}
+
 	@throttle
 	async pull(head?: Branch, unshallow?: boolean): Promise<void> {
 		let remote: string | undefined;