Commit message length warning

docs/Config.md

@@ -45,6 +45,7 @@ gui:
       - red
   commitLength:
     show: true
+    warningThreshold: 0
   mouseEvents: true
   skipUnstageLineWarning: false
   skipStashWarning: false
@@ -530,4 +531,4 @@ notARepository: 'create'
 ```yaml
 # to skip without creating a new repo
 notARepository: 'skip'
-```
+```

pkg/config/user_config.go

@@ -67,7 +67,8 @@ type ThemeConfig struct {
 }
 
 type CommitLengthConfig struct {
-	Show bool `yaml:"show"`
+	Show                bool `yaml:"show"`
+	WarningThreshold int  `yaml:"warningThreshold"`
 }
 
 type GitConfig struct {
@@ -362,7 +363,10 @@ func GetDefaultConfig() *UserConfig {
 				CherryPickedCommitFgColor: []string{"blue"},
 				UnstagedChangesColor:      []string{"red"},
 			},
-			CommitLength:             CommitLengthConfig{Show: true},
+			CommitLength: CommitLengthConfig{
+				Show:                true,
+				WarningThreshold: 0,
+			},
 			SkipNoStagedFilesWarning: false,
 			ShowListFooter:           true,
 			ShowCommandLog:           true,

pkg/gui/commit_message_panel.go

@@ -1,11 +1,12 @@
 package gui
 
 import (
-	"strconv"
+	"bufio"
 	"strings"
-
+	"fmt"
 	"github.com/jesseduffield/gocui"
 	"github.com/jesseduffield/lazygit/pkg/utils"
+	"github.com/jesseduffield/lazygit/pkg/theme"
 )
 
 func (gui *Gui) handleCommitMessageFocused() error {
@@ -28,9 +29,27 @@ func (gui *Gui) RenderCommitLength() {
 		return
 	}
 
-	gui.Views.CommitMessage.Subtitle = getBufferLength(gui.Views.CommitMessage)
+	commitLength := getBufferLength(gui.Views.CommitMessage)
+	gui.Views.CommitMessage.Subtitle = fmt.Sprintf(" %d ", commitLength)
+	gui.checkCommitLengthWarning(commitLength)
 }
 
-func getBufferLength(view *gocui.View) string {
-	return " " + strconv.Itoa(strings.Count(view.TextArea.GetContent(), "")-1) + " "
+func getBufferLength(view *gocui.View) int {
+	return strings.Count(view.TextArea.GetContent(), "") - 1
 }
+
+func (gui *Gui) checkCommitLengthWarning(commitLength int) {
+	if gui.c.UserConfig.Gui.CommitLength.WarningThreshold == 0 {
+		return
+	}
+
+	scanner := bufio.NewScanner(strings.NewReader(gui.Views.CommitMessage.TextArea.GetContent()))
+
+	for scanner.Scan() {
+		if len(scanner.Text()) > gui.c.UserConfig.Gui.CommitLength.WarningThreshold {
+			gui.Views.CommitMessage.FgColor = gocui.ColorRed
+		} else {
+			gui.Views.CommitMessage.FgColor = theme.GocuiDefaultTextColor
+		}
+	}
+}