Add API and button to reset a build

The, roughly, redeploys the kubernetes resources in initial
state (i.e. 0 replicas and init-status=todo) so the controller
starts a new initialization job.

src/runboat/api.py

@@ -177,6 +177,13 @@ async def stop_build(name: str) -> None:
     await build.stop()
 
 
+@router.post("/builds/{name}/reset")
+async def reset_build(name: str) -> None:
+    """Redeploy, so as to reinitialize."""
+    build = await _build_by_name(name)
+    await build.redeploy()
+
+
 @router.delete("/builds/{name}", dependencies=[Depends(authenticated)])
 async def undeploy_build(name: str) -> None:
     """Delete the deployment and drop the database."""

src/runboat/models.py

@@ -220,6 +220,28 @@ class Build(BaseModel):
         # to remove the deployment.
         await k8s.delete_deployment(self.deployment_name)
 
+    async def redeploy(self) -> None:
+        """Redeploy a build, to reinitialize it."""
+        _logger.info(f"Redeploying {self}.")
+        await k8s.kill_job(self.name, job_kind=k8s.DeploymentMode.cleanup)
+        await k8s.kill_job(self.name, job_kind=k8s.DeploymentMode.initialize)
+        deployment_vars = k8s.make_deployment_vars(
+            k8s.DeploymentMode.deployment,
+            self.name,
+            self.slug,
+            self.commit_info,
+            settings.get_build_settings(
+                self.commit_info.repo, self.commit_info.target_branch
+            )[0],
+        )
+        await k8s.deploy(deployment_vars)
+        await github.notify_status(
+            self.commit_info.repo,
+            self.commit_info.git_commit,
+            GitHubStatusState.pending,
+            target_url=None,
+        )
+
     async def initialize(self) -> None:
         """Launch the initialization job."""
         # Start initizalization job. on_initialize_{started,succeeded,failed} callbacks

src/runboat/webui-templates/runboat-build-element.js

@@ -78,6 +78,7 @@ class RunboatBuildElement extends LitElement {
             <p>
                 <button @click="${this.startHandler}" ?disabled="${this.build.status != "stopped"}">start</button>
                 <button @click="${this.stopHandler}" ?disabled="${this.build.status != "started"}">stop</button>
+                <button @click="${this.resetHandler}">reset</button>
             </p>
         </div>
         `;
@@ -90,6 +91,10 @@ class RunboatBuildElement extends LitElement {
     stopHandler(e) {
         fetch(`/api/v1/builds/${this.build.name}/stop`, {method: 'POST'});
     }
+
+    resetHandler(e) {
+        fetch(`/api/v1/builds/${this.build.name}/reset`, {method: 'POST'});
+    }
 }
 
 export {RunboatBuildElement};