Implement a 'Use Last Successful Prebuild' workspace creation mode

Author: jankeromnes

components/dashboard/src/start/CreateWorkspace.tsx

@@ -269,6 +269,9 @@ export default class CreateWorkspace extends React.Component<CreateWorkspaceProp
             return (
                 <RunningPrebuildView
                     runningPrebuild={result.runningWorkspacePrebuild}
+                    onUseLastSuccessfulPrebuild={() =>
+                        this.createWorkspace(CreateWorkspaceMode.UseLastSuccessfulPrebuild)
+                    }
                     onIgnorePrebuild={() => this.createWorkspace(CreateWorkspaceMode.ForceNew)}
                     onPrebuildSucceeded={() => this.createWorkspace(CreateWorkspaceMode.UsePrebuild)}
                 />
@@ -531,6 +534,7 @@ interface RunningPrebuildViewProps {
         starting: RunningWorkspacePrebuildStarting;
         sameCluster: boolean;
     };
+    onUseLastSuccessfulPrebuild: () => void;
     onIgnorePrebuild: () => void;
     onPrebuildSucceeded: () => void;
 }
@@ -565,8 +569,14 @@ function RunningPrebuildView(props: RunningPrebuildViewProps) {
             {/* TODO(gpl) Copied around in Start-/CreateWorkspace. This should properly go somewhere central. */}
             <div className="h-full mt-6 w-11/12 lg:w-3/5">
                 <PrebuildLogs workspaceId={workspaceId} onIgnorePrebuild={props.onIgnorePrebuild}>
+                    <button
+                        className="secondary"
+                        onClick={() => props.onUseLastSuccessfulPrebuild && props.onUseLastSuccessfulPrebuild()}
+                    >
+                        Use Last Successful Prebuild
+                    </button>
                     <button className="secondary" onClick={() => props.onIgnorePrebuild && props.onIgnorePrebuild()}>
-                        Skip Prebuild
+                        Don't Wait For Prebuild
                     </button>
                 </PrebuildLogs>
             </div>

components/gitpod-protocol/src/protocol.ts

@@ -1372,6 +1372,8 @@ export enum CreateWorkspaceMode {
     UsePrebuild = "use-prebuild",
     // SelectIfRunning returns a list of currently running workspaces for the context URL if there are any, otherwise falls back to Default mode
     SelectIfRunning = "select-if-running",
+    // UseLastSuccessfulPrebuild returns ...
+    UseLastSuccessfulPrebuild = "use-last-successful-prebuild",
 }
 
 export namespace WorkspaceCreationResult {

components/server/ee/src/workspace/gitpod-server-impl.ts

@@ -963,6 +963,21 @@ export class GitpodServerEEImpl extends GitpodServerImpl {
 
             const logCtx: LogContext = { userId: user.id };
             const cloneUrl = context.repository.cloneUrl;
+            if (mode === CreateWorkspaceMode.UseLastSuccessfulPrebuild) {
+                const maxDepth = this.config.incrementalPrebuilds.commitHistory;
+                const hostContext = this.hostContextProvider.get(context.repository.host);
+                const repoProvider = hostContext?.services?.repositoryProvider;
+                if (repoProvider) {
+                    const commitHistory = await repoProvider.getCommitHistory(
+                        user,
+                        context.repository.owner,
+                        context.repository.name,
+                        context.revision,
+                        maxDepth,
+                    );
+                    log.info("findPrebuiltWorkspace: incremental workspace", { commitHistory });
+                }
+            }
             const prebuiltWorkspace = await this.workspaceDb
                 .trace(ctx)
                 .findPrebuiltWorkspaceByCommit(cloneUrl, commitSHAs);