enhance(repo): update validation to include first-time option (#535)

Co-authored-by: Tim Huynh <[email protected]>

Author: ecrupper

action/repo/validate.go

@@ -34,11 +34,13 @@ func (c *Config) Validate() error {
 		if len(c.ApproveBuild) > 0 &&
 			c.ApproveBuild != constants.ApproveForkAlways &&
 			c.ApproveBuild != constants.ApproveForkNoWrite &&
+			c.ApproveBuild != constants.ApproveOnce &&
 			c.ApproveBuild != constants.ApproveNever {
 			return fmt.Errorf(
-				"invalid input for approve-build: must be `%s`, `%s`, or `%s`",
+				"invalid input for approve-build: must be `%s`, `%s`, `%s`, or `%s`",
 				constants.ApproveForkAlways,
 				constants.ApproveForkNoWrite,
+				constants.ApproveOnce,
 				constants.ApproveNever,
 			)
 		}

action/repo/validate_test.go

@@ -96,6 +96,25 @@ func TestRepo_Config_Validate(t *testing.T) {
 				Output:       "",
 			},
 		},
+		{
+			failure: false,
+			config: &Config{
+				Action:       "update",
+				Org:          "github",
+				Name:         "octocat",
+				Link:         "https://github.com/github/octocat",
+				Clone:        "https://github.com/github/octocat.git",
+				Branch:       "main",
+				Timeout:      60,
+				Visibility:   "public",
+				Private:      false,
+				Trusted:      false,
+				Active:       true,
+				Events:       []string{"push", "pull_request", "comment", "deployment", "tag"},
+				ApproveBuild: "first-time",
+				Output:       "",
+			},
+		},
 		{
 			failure: true,
 			config: &Config{