let the porter app creation api call fail if build and image are missing, not cli (#3615)

Co-authored-by: David Townley <davidtownley@Davids-MacBook-Air.local>

api/client/porter_app.go

@@ -315,9 +315,6 @@ func (c *Client) CreatePorterAppDBEntry(
 			Tag:        inp.ImageTag,
 		}
 	}
-	if sourceType == "" {
-		return fmt.Errorf("cannot determine source type")
-	}
 
 	req := &porter_app.CreateAppRequest{
 		Name:           inp.AppName,

api/server/handlers/porter_app/create_app.go

@@ -2,6 +2,7 @@ package porter_app
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/http"
 
@@ -31,6 +32,9 @@ func NewCreateAppHandler(
 	}
 }
 
+// ErrMissingSourceType is returned when the source type is not specified
+var ErrMissingSourceType = errors.New("missing source type")
+
 // SourceType is a string type specifying the source type of an app. This is specified in the incoming request
 type SourceType string
 
@@ -117,13 +121,6 @@ func (c *CreateAppHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	telemetry.WithAttributes(span, telemetry.AttributeKV{Key: "app-name", Value: request.Name})
 
-	if request.SourceType == "" {
-		err := telemetry.Error(ctx, span, nil, "source type is required")
-		c.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusBadRequest))
-		return
-	}
-	telemetry.WithAttributes(span, telemetry.AttributeKV{Key: "source-type", Value: request.SourceType})
-
 	porterAppDBEntries, err := c.Repo().PorterApp().ReadPorterAppsByProjectIDAndName(project.ID, request.Name)
 	if err != nil {
 		err := telemetry.Error(ctx, span, nil, "error reading porter apps by project id and name")
@@ -142,6 +139,13 @@ func (c *CreateAppHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if request.SourceType == "" {
+		err := telemetry.Error(ctx, span, ErrMissingSourceType, "source type is required")
+		c.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusBadRequest))
+		return
+	}
+	telemetry.WithAttributes(span, telemetry.AttributeKV{Key: "source-type", Value: request.SourceType})
+
 	var porterApp *types.PorterApp
 	switch request.SourceType {
 	case SourceType_Github:

cli/cmd/v2/apply.go

@@ -72,21 +72,24 @@ func Apply(ctx context.Context, cliConf config.CLIConfig, client api.Client, por
 		}
 		b64AppProto = parseResp.B64AppProto
 
-		// we only need to create the app if a porter yaml is provided (otherwise it must already exist)
-		createPorterAppDBEntryInp, err := createPorterAppDbEntryInputFromProtoAndEnv(parseResp.B64AppProto)
+		// override app name if provided
+		appName, err = appNameFromB64AppProto(parseResp.B64AppProto)
 		if err != nil {
-			return fmt.Errorf("error creating porter app db entry input from proto: %w", err)
+			return fmt.Errorf("error getting app name from b64 app proto: %w", err)
 		}
 
-		err = client.CreatePorterAppDBEntry(ctx, cliConf.Project, cliConf.Cluster, createPorterAppDBEntryInp)
+		// we only need to create the app if a porter yaml is provided (otherwise it must already exist)
+		createPorterAppDBEntryInp, err := createPorterAppDbEntryInputFromProtoAndEnv(parseResp.B64AppProto)
 		if err != nil {
-			return fmt.Errorf("error creating porter app db entry: %w", err)
+			return fmt.Errorf("unable to form porter app creation input from yaml: %w", err)
 		}
 
-		// override app name if provided
-		appName, err = appNameFromB64AppProto(parseResp.B64AppProto)
+		err = client.CreatePorterAppDBEntry(ctx, cliConf.Project, cliConf.Cluster, createPorterAppDBEntryInp)
 		if err != nil {
-			return fmt.Errorf("error getting app name from b64 app proto: %w", err)
+			if err.Error() == porter_app.ErrMissingSourceType.Error() {
+				return fmt.Errorf("cannot find existing Porter app with name %s and no build or image settings were specified in porter.yaml", appName)
+			}
+			return fmt.Errorf("unable to create porter app from yaml: %w", err)
 		}
 
 		envGroupResp, err := client.CreateOrUpdateAppEnvironment(ctx, cliConf.Project, cliConf.Cluster, appName, targetResp.DeploymentTargetID, parseResp.EnvVariables, parseResp.EnvSecrets, parseResp.B64AppProto)
@@ -309,7 +312,7 @@ func createPorterAppDbEntryInputFromProtoAndEnv(base64AppProto string) (api.Crea
 		return input, nil
 	}
 
-	return input, fmt.Errorf("app does not contain build or image settings")
+	return input, nil
 }
 
 func buildSettingsFromBase64AppProto(base64AppProto string) (buildInput, error) {