cmd/relui: add mail-dl-cl workflow

Previously, this task was exposed only via the cmd/releasebot CLI.
Now that relui workflows support slice of string parameters,
it's easy to expose this task via a relui workflow too.

This is another step in having relui do more release work.

For golang/go#40279.

Change-Id: Icf94e49ac8124ffb77a78b80c65c477d6b43bf05
Reviewed-on: https://go-review.googlesource.com/c/build/+/404535
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Run-TryBot: Dmitri Shuralyov <[email protected]>
Reviewed-by: Heschi Kreinick <[email protected]>

Author: dmitshur

cmd/relui/deployment-prod.yaml

@@ -28,6 +28,7 @@ spec:
             # Define the site header and external service configuration.
             - "--site-title=Go Releases"
             - "--site-header-css=Site-header--production"
+            - "--gerrit-api-secret=secret:symbolic-datum-552/gobot-password"
             - "--twitter-api-secret=secret:symbolic-datum-552/twitter-api-secret"
           ports:
             - containerPort: 444

cmd/relui/main.go

@@ -12,6 +12,7 @@ import (
 	"net/url"
 
 	"github.com/jackc/pgx/v4/pgxpool"
+	"golang.org/x/build/gerrit"
 	"golang.org/x/build/internal/https"
 	"golang.org/x/build/internal/relui"
 	"golang.org/x/build/internal/secret"
@@ -32,6 +33,7 @@ func main() {
 	if err := secret.InitFlagSupport(context.Background()); err != nil {
 		log.Fatalln(err)
 	}
+	gerritAPIFlag := secret.Flag("gerrit-api-secret", "Gerrit API secret to use for workflows that interact with Gerrit.")
 	var twitterAPI secret.TwitterCredentials
 	secret.JSONVarFlag(&twitterAPI, "twitter-api-secret", "Twitter API secret to use for workflows involving tweeting.")
 	https.RegisterFlags(flag.CommandLine)
@@ -61,12 +63,17 @@ func main() {
 			CSSClass: *siteHeaderCSS,
 		}
 		extCfg = task.ExternalConfig{
+			GerritAPI: struct {
+				URL  string
+				Auth gerrit.Auth
+			}{"https://go-review.googlesource.com", gerrit.BasicAuth("git-gobot.golang.org", *gerritAPIFlag)},
 			// TODO(go.dev/issue/51150): When twitter client creation is factored out from task package, update code here.
 			TwitterAPI: twitterAPI,
 		}
 	)
 
 	dh := relui.NewDefinitionHolder()
+	relui.RegisterMailDLCLDefinition(dh, extCfg)
 	relui.RegisterTweetDefinitions(dh, extCfg)
 	db, err := pgxpool.Connect(ctx, *pgConnect)
 	if err != nil {

internal/relui/workflows.go

@@ -55,6 +55,30 @@ func (h *DefinitionHolder) Definitions() map[string]*workflow.Definition {
 	return defs
 }
 
+// RegisterMailDLCLDefinition registers a workflow definition for mailing a golang.org/dl CL
+// onto h, using e for the external service configuration.
+func RegisterMailDLCLDefinition(h *DefinitionHolder, e task.ExternalConfig) {
+	versions := workflow.Parameter{
+		Name:          "Versions",
+		ParameterType: workflow.SliceShort,
+		Doc: `Versions are the Go versions that have been released.
+
+The versions must use the same format as Go tags,
+and the list must contain one or two versions.
+
+For example:
+• "go1.18.2" and "go1.17.10" for a minor Go release
+• "go1.19" for a major Go release
+• "go1.19beta1" or "go1.19rc1" for a pre-release`,
+	}
+
+	wd := workflow.New()
+	wd.Output("ChangeURL", wd.Task("mail-dl-cl", func(ctx *workflow.TaskContext, versions []string) (string, error) {
+		return task.MailDLCL(ctx, versions, e)
+	}, wd.Parameter(versions)))
+	h.RegisterDefinition("mail-dl-cl", wd)
+}
+
 // RegisterTweetDefinitions registers workflow definitions involving tweeting
 // onto h, using e for the external service configuration.
 func RegisterTweetDefinitions(h *DefinitionHolder, e task.ExternalConfig) {