stubs for restarting, canceling builds

drone.go

@@ -79,6 +79,8 @@ func main() {
 
 			repo.GET("/builds", server.GetBuilds)
 			repo.GET("/builds/:number", server.GetBuild)
+			repo.POST("/builds/:number", server.RunBuild)
+			repo.DELETE("/builds/:number", server.KillBuild)
 			repo.GET("/logs/:number/:task", server.GetBuildLogs)
 			repo.POST("/status/:number", server.PostBuildStatus)
 		}

server/builds.go

@@ -95,3 +95,79 @@ func PostBuildStatus(c *gin.Context) {
 		c.JSON(201, in)
 	}
 }
+
+// RunBuild accepts a request to restart an existing build.
+//
+//     POST /api/builds/:owner/:name/builds/:number
+//
+func RunBuild(c *gin.Context) {
+	store := ToDatastore(c)
+	repo := ToRepo(c)
+	num, err := strconv.Atoi(c.Params.ByName("number"))
+	if err != nil {
+		c.Fail(400, err)
+		return
+	}
+	build, err := store.Build(repo.FullName, num)
+	if err != nil {
+		c.Fail(404, err)
+		return
+	}
+
+	// must not restart a running build
+	if build.State == common.StatePending || build.State == common.StateRunning {
+		c.Fail(409, err)
+		return
+	}
+
+	build.State = common.StatePending
+	build.Started = 0
+	build.Finished = 0
+	build.Duration = 0
+	build.Statuses = []*common.Status{}
+	for _, task := range build.Tasks {
+		task.State = common.StatePending
+		task.Started = 0
+		task.Finished = 0
+		task.ExitCode = 0
+	}
+
+	err = store.SetBuild(repo.FullName, build)
+	if err != nil {
+		c.Fail(500, err)
+		return
+	}
+
+	// TODO push build to queue
+
+	c.JSON(202, build)
+}
+
+// KillBuild accepts a request to kill a running build.
+//
+//     DELETE /api/builds/:owner/:name/builds/:number
+//
+func KillBuild(c *gin.Context) {
+	store := ToDatastore(c)
+	repo := ToRepo(c)
+	num, err := strconv.Atoi(c.Params.ByName("number"))
+	if err != nil {
+		c.Fail(400, err)
+		return
+	}
+	build, err := store.Build(repo.FullName, num)
+	if err != nil {
+		c.Fail(404, err)
+		return
+	}
+
+	// must not restart a running build
+	if build.State != common.StatePending && build.State != common.StateRunning {
+		c.Fail(409, err)
+		return
+	}
+
+	// TODO tell queue to cancel build
+
+	c.Writer.WriteHeader(202)
+}

server/static/scripts/controllers/builds.js

@@ -87,6 +87,17 @@
 			$scope.error = err;
 		});
 
+		$scope.restart = function() {
+			builds.restart(fullName, number).catch(function(err){
+				$scope.error = err;
+			});
+		};
+
+		$scope.cancel = function() {
+			builds.cancel(fullName, number).catch(function(err) {
+				$scope.error = err;
+			});
+		};
 	}
 
 	angular

server/static/scripts/services/builds.js

@@ -26,6 +26,26 @@
 		this.get = function(repoName, buildNumber) {
 			return $http.get('/api/repos/'+repoName+'/builds/'+buildNumber);
 		};
+
+		/**
+		 * Restarts a build.
+		 *
+		 * @param {string} Name of the repository.
+		 * @param {number} Number of the build.
+		 */
+		this.restart = function(repoName, buildNumber) {
+			return $http.post('/api/repos/' + repoName+'/builds/'+buildNumber);
+		};
+
+		/**
+		 * Cancels a running build.
+		 *
+		 * @param {string} Name of the repository.
+		 * @param {number} Number of the build.
+		 */
+		this.cancel = function(repoName, buildNumber) {
+			return $http.delete('/api/repos/'+repoName+'/builds/'+buildNumber);
+		};
 	}
 
 	angular

server/static/scripts/views/build.html

@@ -2,6 +2,11 @@
 
 <a href="/{{ repo.full_name }}">Back</a>
 
+<div>
+	<button ng-if="build.state !== 'pending' && build.state !== 'started'" ng-click="restart()">Restart</button>
+	<button ng-if="build.state === 'pending' || build.state === 'started'" ng-click="cancel()">Cancel</button>
+</div>
+
 <dl>
 	<dt>Build State</dt>
 	<dd>{{ build.state }}</dd>