Add config option for length of commit hash displayed in commits view

- Added the user config option to to pkg/config/user_config.go and
schema/config.json and documented in docs/Config.md
- Changed the code that displays the hash in
pkg/gui/presentation/commits.go

Author: oliviaBahr

docs/Config.md

@@ -80,6 +80,7 @@ gui:
   showIcons: false # deprecated: use nerdFontsVersion instead
   nerdFontsVersion: "" # nerd fonts version to use ("2" or "3"); empty means don't show nerd font icons
   showFileIcons: true # for hiding file icons in the file views
+  commitHashLength: 8 # length of commit ID/ref (hash) in commits view
   commandLogSize: 8
   splitDiff: 'auto' # one of 'auto' | 'always'
   skipRewordInEditorWarning: false # for skipping the confirmation before launching the reword editor

pkg/config/user_config.go

@@ -123,6 +123,8 @@ type GuiConfig struct {
 	NerdFontsVersion string `yaml:"nerdFontsVersion" jsonschema:"enum=2,enum=3,enum="`
 	// If true (default), file icons are shown in the file views. Only relevant if NerdFontsVersion is not empty.
 	ShowFileIcons bool `yaml:"showFileIcons"`
+	// Length of commit ID/ref (hash) in commits view.
+	CommitHashLength int `yaml:"commitHashLength" jsonschema:"minimum=1,maximum=12"`
 	// If true, show commit hashes alongside branch names in the branches view.
 	ShowBranchCommitHash bool `yaml:"showBranchCommitHash"`
 	// Height of the command log view
@@ -675,6 +677,7 @@ func GetDefaultConfig() *UserConfig {
 			ShowIcons:                 false,
 			NerdFontsVersion:          "",
 			ShowFileIcons:             true,
+			CommitHashLength:          8,
 			ShowBranchCommitHash:      false,
 			CommandLogSize:            8,
 			SplitDiff:                 "auto",

pkg/gui/presentation/commits.go

@@ -312,9 +312,17 @@ func displayCommit(
 	bisectInfo *git_commands.BisectInfo,
 	isYouAreHereCommit bool,
 ) []string {
-	hashColor := getHashColor(commit, diffName, cherryPickedCommitHashSet, bisectStatus, bisectInfo)
 	bisectString := getBisectStatusText(bisectStatus, bisectInfo)
 
+	hashString := ""
+	hashColor := getHashColor(commit, diffName, cherryPickedCommitHashSet, bisectStatus, bisectInfo)
+	hashLength := common.UserConfig.Gui.CommitHashLength
+	if hashLength > len(commit.Hash) || hashLength < 1 {
+		hashString = hashColor.Sprint(commit.ShortHash())
+	} else {
+		hashString = hashColor.Sprint(commit.Hash[:hashLength])
+	}
+
 	actionString := ""
 	if commit.Action != models.ActionNone {
 		todoString := lo.Ternary(commit.Action == models.ActionConflict, "conflict", commit.Action.String())
@@ -373,7 +381,7 @@ func displayCommit(
 	} else if icons.IsIconEnabled() {
 		cols = append(cols, hashColor.Sprint(icons.IconForCommit(commit)))
 	}
-	cols = append(cols, hashColor.Sprint(commit.ShortHash()))
+	cols = append(cols, hashString)
 	cols = append(cols, bisectString)
 	if fullDescription {
 		cols = append(cols, style.FgBlue.Sprint(

schema/config.json

@@ -309,6 +309,13 @@
           "description": "If true (default), file icons are shown in the file views. Only relevant if NerdFontsVersion is not empty.",
           "default": true
         },
+        "commitHashLength": {
+          "type": "integer",
+          "maximum": 12,
+          "minimum": 1,
+          "description": "Length of commit ID/ref (hash) in commits view.",
+          "default": 8
+        },
         "showBranchCommitHash": {
           "type": "boolean",
           "description": "If true, show commit hashes alongside branch names in the branches view."