Make max commits in graph configurable

Author: kjellkvinge

models/graph.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"code.gitea.io/git"
+	"code.gitea.io/gitea/modules/setting"
 )
 
 // GraphItem represent one commit, or one relation in timeline
@@ -41,7 +42,7 @@ func GetCommitGraph(r *git.Repository) (GraphItems, error) {
 		"--all",
 		"-C",
 		"-M",
-		"-n 100",
+		fmt.Sprintf("-n %d", setting.UI.GraphMaxCommitNum),
 		"--date=iso",
 		fmt.Sprintf("--pretty=format:%s", format),
 	)

modules/setting/setting.go

@@ -276,6 +276,7 @@ var (
 		IssuePagingNum      int
 		RepoSearchPagingNum int
 		FeedMaxCommitNum    int
+		GraphMaxCommitNum   int
 		ReactionMaxUserNum  int
 		ThemeColorMetaTag   string
 		MaxDisplayFileSize  int64
@@ -301,6 +302,7 @@ var (
 		IssuePagingNum:      10,
 		RepoSearchPagingNum: 10,
 		FeedMaxCommitNum:    5,
+		GraphMaxCommitNum:   100,
 		ReactionMaxUserNum:  10,
 		ThemeColorMetaTag:   `#6cc644`,
 		MaxDisplayFileSize:  8388608,