Merge pull request #76 from kolomied/issue/75

Add support for GITHUB_EVENT_PATH variable

Author: owenrumney

cmd/commenter/commenter.go

@@ -110,7 +110,11 @@ More information available %s`,
 }
 
 func extractPullRequestNumber() (int, error) {
-	github_event_file := "/github/workflow/event.json"
+	github_event_file := os.Getenv("GITHUB_EVENT_PATH")
+	if github_event_file == "" {
+		github_event_file = "/github/workflow/event.json"
+	}
+
 	file, err := ioutil.ReadFile(github_event_file)
 	if err != nil {
 		fail(fmt.Sprintf("GitHub event payload not found in %s", github_event_file))