ci: add rerere (#204)

.github/workflows/golangci-lint.yml

@@ -5,6 +5,7 @@ on:
       - v*
     branches:
       - master
+      - rerere
   pull_request:
     tags:
       - v*

.github/workflows/test.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - rerere
   pull_request:
     branches:
       - master

.prow.yaml

@@ -15,6 +15,31 @@ presubmits:
             - --warnings=validate-urls
             - --warnings=unknown-fields
             - --warnings=duplicate-job-refs
+  - name: pull-ti-community-prow-rerere
+    decorate: true
+    always_run: true
+    branches:
+      - ^master$
+    spec:
+      containers:
+        - image: rustinliu/rerere-component:latest
+          command:
+            - rerere
+          args:
+            - --github-token-path=/etc/github/token
+            - --dry-run=false
+            - --github-endpoint=https://api.github.com
+            - --requireContexts=build
+            - --requireContexts=lint
+            - --labels=status/can-merge
+          volumeMounts:
+            - name: github-token
+              mountPath: /etc/github
+              readOnly: true
+      volumes:
+        - name: github-token
+          secret:
+            secretName: github-token
 postsubmits:
   - name: post-ti-community-prow-deploy-prow
     run_if_changed: 'configs/prow-dev/cluster/'

internal/pkg/rerere/rerere.go

@@ -58,6 +58,7 @@ type RetestingOptions struct {
 func (o *RetestingOptions) AddFlags(fs *flag.FlagSet) {
 	fs.StringVar(&o.RetestingBranch, "retesting-branch", defaultRetestingBranch, "Retesting target branch.")
 	fs.IntVar(&o.Retry, "retry", defaultRetestingTimes, "Retry testing times.")
+	// TODO: it should be require-contexts.
 	fs.Var(&o.Contexts, "requireContexts", "Required requireContexts that must be green to merge.")
 	fs.DurationVar(&o.Timeout, "timeout", defaultTimeOut, "Test timeout time.")
 }