Add CI_PIPELINE_RERUNS environment variable (#6588)

pipeline/frontend/metadata/environment.go

@@ -77,6 +77,9 @@ func (m *Metadata) Environ() map[string]string {
 	setNonEmptyEnvVar(params, "CI_PIPELINE_STARTED", strconv.FormatInt(pipeline.Started, 10))
 	setNonEmptyEnvVar(params, "CI_PIPELINE_AUTHOR", pipeline.Author)
 	setNonEmptyEnvVar(params, "CI_PIPELINE_AVATAR", pipeline.Avatar)
+	if pipeline.RerunCount > 0 {
+		setNonEmptyEnvVar(params, "CI_PIPELINE_RERUNS", strconv.FormatInt(pipeline.RerunCount, 10))
+	}
 
 	workflow := m.Workflow
 	setNonEmptyEnvVar(params, "CI_WORKFLOW_NAME", workflow.Name)

pipeline/frontend/metadata/types.go

@@ -56,6 +56,7 @@ type (
 		DeployTask  string   `json:"task,omitempty"`
 		Commit      Commit   `json:"commit"`
 		Parent      int64    `json:"parent,omitempty"`
+		RerunCount  int64    `json:"rerun_count,omitempty"`
 		Cron        string   `json:"cron,omitempty"`
 		Author      string   `json:"author,omitempty"`
 		Avatar      string   `json:"avatar,omitempty"`