gitops - handle app file does not exists in repo (#580)

kotsadm/pkg/gitops/gitops.go

@@ -262,16 +262,24 @@ func CreateGitOpsCommit(gitOpsConfig *GitOpsConfig, appSlug string, appName stri
 		}
 	}
 
-	// if the file has not changed, end now
-	currentRevision, err := ioutil.ReadFile(filepath.Join(workDir, gitOpsConfig.Path, fmt.Sprintf("%s.yaml", appSlug)))
-	if err != nil {
-		return "", errors.Wrap(err, "failed to read current file")
-	}
-	if string(currentRevision) == string(out) {
-		return "", nil
+	filePath := filepath.Join(workDir, gitOpsConfig.Path, fmt.Sprintf("%s.yaml", appSlug))
+	_, err = os.Stat(filePath)
+	if err == nil { // if the file has not changed, end now
+		currentRevision, err := ioutil.ReadFile(filePath)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to read current file")
+		}
+		if string(currentRevision) == string(out) {
+			return "", nil
+		}
+	} else if os.IsNotExist(err) { // create subdirectory if not exist
+		err := os.MkdirAll(filepath.Join(workDir, gitOpsConfig.Path), 0644)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to mkdir for file")
+		}
 	}
 
-	err = ioutil.WriteFile(filepath.Join(workDir, gitOpsConfig.Path, fmt.Sprintf("%s.yaml", appSlug)), out, 0644)
+	err = ioutil.WriteFile(filePath, out, 0644)
 	if err != nil {
 		return "", errors.Wrap(err, "failed to write updated app yaml")
 	}