CI: add source_sha option to enterprise-pr-check action (#59314)

* add source_sha option to enterprise-pr-check action

* Add git hash to enterprise check branch

.github/workflows/enterprise-pr-check.yml

@@ -23,4 +23,4 @@ jobs:
           repository: grafana/grafana-enterprise
           event_type: oss-pull-request
           client_payload:
-            '{"source_branch": "${{ github.head_ref }}", "target_branch": "${{ github.base_ref }}", "pr_number": "${{ github.event.number }}"}'
+            '{"source_sha": "${{ github.sha }}", "source_branch": "${{ github.head_ref }}", "target_branch": "${{ github.base_ref }}", "pr_number": "${{ github.event.number }}"}'

pkg/build/cmd/enterprisecheck.go

@@ -18,24 +18,31 @@ type checkOpts struct {
 }
 
 func getCheckOpts(args []string) (*checkOpts, error) {
-	sha, ok := env.Lookup("SOURCE_COMMIT", args)
+	branch, ok := env.Lookup("DRONE_SOURCE_BRANCH", args)
 	if !ok {
-		return nil, cli.Exit(`missing environment variable "SOURCE_COMMIT"`, 1)
+		return nil, cli.Exit("Unable to retrieve build source branch", 1)
 	}
 
-	url, ok := env.Lookup("DRONE_BUILD_LINK", args)
+	var (
+		rgx     = git.PRCheckRegexp()
+		matches = rgx.FindStringSubmatch(branch)
+	)
+
+	sha, ok := env.Lookup("SOURCE_COMMIT", args)
 	if !ok {
-		return nil, cli.Exit(`missing environment variable "DRONE_BUILD_LINK"`, 1)
+		if matches == nil || len(matches) <= 1 {
+			return nil, cli.Exit("Unable to retrieve source commit", 1)
+		}
+		sha = matches[2]
 	}
 
-	branch, ok := env.Lookup("DRONE_SOURCE_BRANCH", args)
+	url, ok := env.Lookup("DRONE_BUILD_LINK", args)
 	if !ok {
-		return nil, cli.Exit("Unable to retrieve build source branch", 1)
+		return nil, cli.Exit(`missing environment variable "DRONE_BUILD_LINK"`, 1)
 	}
 
 	prStr, ok := env.Lookup("OSS_PULL_REQUEST", args)
 	if !ok {
-		matches := git.PRCheckRegexp().FindStringSubmatch(branch)
 		if matches == nil || len(matches) <= 1 {
 			return nil, cli.Exit("Unable to retrieve PR number", 1)
 		}