add file watching for modified files

log createErrorPanel error

swallow error when adding file to watcher

1 files changed, 64 insertions, 0 deletions

diff --git a/pkg/gui/file_watching.go b/pkg/gui/file_watching.go
new file mode 100644
index 000000000..90fb32639
--- /dev/null
+++ b/pkg/gui/file_watching.go
@@ -0,0 +1,64 @@
+package gui
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/jesseduffield/lazygit/pkg/commands"
+)
+
+// NOTE: given that we often edit files ourselves, this may make us end up refreshing files too often
+// TODO: consider watching the whole directory recursively (could be more expensive)
+func (gui *Gui) watchFilesForChanges() {
+	var err error
+	gui.fileWatcher, err = fsnotify.NewWatcher()
+	if err != nil {
+		gui.Log.Error(err)
+		return
+	}
+	go func() {
+		for {
+			select {
+			// watch for events
+			case event := <-gui.fileWatcher.Events:
+				if event.Op == fsnotify.Chmod {
+					// for some reason we pick up chmod events when they don't actually happen
+					continue
+				}
+				// only refresh if we're not already
+				if !gui.State.IsRefreshingFiles {
+					if err := gui.refreshFiles(); err != nil {
+						err = gui.createErrorPanel(gui.g, err.Error())
+						if err != nil {
+							gui.Log.Error(err)
+						}
+					}
+				}
+
+			// watch for errors
+			case err := <-gui.fileWatcher.Errors:
+				if err != nil {
+					gui.Log.Warn(err)
+				}
+			}
+		}
+	}()
+}
+
+func (gui *Gui) addFilesToFileWatcher(files []*commands.File) error {
+	// watch the files for changes
+	dirName, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
+	for _, file := range files {
+		if err := gui.fileWatcher.Add(filepath.Join(dirName, file.Name)); err != nil {
+			// swallowing errors here because it doesn't really matter if we can't watch a file
+			gui.Log.Warn(err)
+		}
+	}
+
+	return nil
+}