fix: watch mode only detects Go code changes if text also changes

Closes #960

Author: a-h

.version

@@ -1 +1 @@
-0.3.828
+0.3.828

cmd/templ/generatecmd/cmd.go

@@ -226,14 +226,18 @@ func (cmd Generate) Run(ctx context.Context) (err error) {
 				if err != nil {
 					errs <- err
 				}
-				if r.GoUpdated || r.TextUpdated {
-					postGeneration <- &GenerationEvent{
-						Event:       event,
-						Updated:     r.Updated,
-						GoUpdated:   r.GoUpdated,
-						TextUpdated: r.TextUpdated,
-					}
+				if !(r.GoUpdated || r.TextUpdated) {
+					cmd.Log.Debug("File not updated", slog.String("file", event.Name))
+					return
+				}
+				e := &GenerationEvent{
+					Event:       event,
+					Updated:     r.Updated,
+					GoUpdated:   r.GoUpdated,
+					TextUpdated: r.TextUpdated,
 				}
+				cmd.Log.Debug("File updated", slog.String("file", event.Name))
+				postGeneration <- e
 			}(event)
 		}
 		// Wait for all events to be processed before closing.

cmd/templ/generatecmd/eventhandler.go

@@ -282,16 +282,16 @@ func (h *FSEventHandler) generate(ctx context.Context, fileName string) (result
 			if err = os.WriteFile(txtFileName, []byte(joined), 0o644); err != nil {
 				return result, nil, fmt.Errorf("failed to write string literal file %q: %w", txtFileName, err)
 			}
+		}
 
-			// Check whether the change would require a recompilation to take effect.
-			h.fileNameToOutputMutex.Lock()
-			defer h.fileNameToOutputMutex.Unlock()
-			previous := h.fileNameToOutput[fileName]
-			if generator.HasChanged(previous, generatorOutput) {
-				result.GoUpdated = true
-			}
-			h.fileNameToOutput[fileName] = generatorOutput
+		// Check whether the change would require a recompilation to take effect.
+		h.fileNameToOutputMutex.Lock()
+		defer h.fileNameToOutputMutex.Unlock()
+		previous := h.fileNameToOutput[fileName]
+		if generator.HasChanged(previous, generatorOutput) {
+			result.GoUpdated = true
 		}
+		h.fileNameToOutput[fileName] = generatorOutput
 	}
 
 	parsedDiagnostics, err := parser.Diagnose(t)