Keep file tree view icons consistent with icon theme (#33921)

Fix #33914

before:
![3000-gogitea-gitea-y4ulxr46c4k ws-us118 gitpod io_test_test
gitea_src_branch_main_
gitmodules](https://github.com/user-attachments/assets/ca50eeff-cc44-4041-b01f-c0c5bdd3b6aa)

after:
![3000-gogitea-gitea-y4ulxr46c4k ws-us118 gitpod io_test_test
gitea_src_branch_main_README
md](https://github.com/user-attachments/assets/3b87fdbd-81d0-4831-8a74-4dbfcd5b6d91)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/git/error.go

@@ -32,19 +32,19 @@ func (err ErrNotExist) Unwrap() error {
 	return util.ErrNotExist
 }
 
-// ErrBadLink entry.FollowLink error
-type ErrBadLink struct {
+// ErrSymlinkUnresolved entry.FollowLink error
+type ErrSymlinkUnresolved struct {
 	Name    string
 	Message string
 }
 
-func (err ErrBadLink) Error() string {
+func (err ErrSymlinkUnresolved) Error() string {
 	return fmt.Sprintf("%s: %s", err.Name, err.Message)
 }
 
-// IsErrBadLink if some error is ErrBadLink
-func IsErrBadLink(err error) bool {
-	_, ok := err.(ErrBadLink)
+// IsErrSymlinkUnresolved if some error is ErrSymlinkUnresolved
+func IsErrSymlinkUnresolved(err error) bool {
+	_, ok := err.(ErrSymlinkUnresolved)
 	return ok
 }
 

modules/git/tree_entry.go

@@ -8,6 +8,8 @@ import (
 	"io"
 	"sort"
 	"strings"
+
+	"code.gitea.io/gitea/modules/util"
 )
 
 // Type returns the type of the entry (commit, tree, blob)
@@ -25,7 +27,7 @@ func (te *TreeEntry) Type() string {
 // FollowLink returns the entry pointed to by a symlink
 func (te *TreeEntry) FollowLink() (*TreeEntry, error) {
 	if !te.IsLink() {
-		return nil, ErrBadLink{te.Name(), "not a symlink"}
+		return nil, ErrSymlinkUnresolved{te.Name(), "not a symlink"}
 	}
 
 	// read the link
@@ -56,13 +58,13 @@ func (te *TreeEntry) FollowLink() (*TreeEntry, error) {
 	}
 
 	if t == nil {
-		return nil, ErrBadLink{te.Name(), "points outside of repo"}
+		return nil, ErrSymlinkUnresolved{te.Name(), "points outside of repo"}
 	}
 
 	target, err := t.GetTreeEntryByPath(lnk)
 	if err != nil {
 		if IsErrNotExist(err) {
-			return nil, ErrBadLink{te.Name(), "broken link"}
+			return nil, ErrSymlinkUnresolved{te.Name(), "broken link"}
 		}
 		return nil, err
 	}
@@ -70,33 +72,27 @@ func (te *TreeEntry) FollowLink() (*TreeEntry, error) {
 }
 
 // FollowLinks returns the entry ultimately pointed to by a symlink
-func (te *TreeEntry) FollowLinks() (*TreeEntry, error) {
+func (te *TreeEntry) FollowLinks(optLimit ...int) (*TreeEntry, error) {
 	if !te.IsLink() {
-		return nil, ErrBadLink{te.Name(), "not a symlink"}
+		return nil, ErrSymlinkUnresolved{te.Name(), "not a symlink"}
 	}
+	limit := util.OptionalArg(optLimit, 10)
 	entry := te
-	for i := 0; i < 999; i++ {
-		if entry.IsLink() {
-			next, err := entry.FollowLink()
-			if err != nil {
-				return nil, err
-			}
-			if next.ID == entry.ID {
-				return nil, ErrBadLink{
-					entry.Name(),
-					"recursive link",
-				}
-			}
-			entry = next
-		} else {
+	for i := 0; i < limit; i++ {
+		if !entry.IsLink() {
 			break
 		}
+		next, err := entry.FollowLink()
+		if err != nil {
+			return nil, err
+		}
+		if next.ID == entry.ID {
+			return nil, ErrSymlinkUnresolved{entry.Name(), "recursive link"}
+		}
+		entry = next
 	}
 	if entry.IsLink() {
-		return nil, ErrBadLink{
-			te.Name(),
-			"too many levels of symbolic links",
-		}
+		return nil, ErrSymlinkUnresolved{te.Name(), "too many levels of symbolic links"}
 	}
 	return entry, nil
 }

modules/git/tree_entry_mode.go

@@ -17,16 +17,12 @@ const (
 	// EntryModeNoEntry is possible if the file was added or removed in a commit. In the case of
 	// added the base commit will not have the file in its tree so a mode of 0o000000 is used.
 	EntryModeNoEntry EntryMode = 0o000000
-	// EntryModeBlob
-	EntryModeBlob EntryMode = 0o100644
-	// EntryModeExec
-	EntryModeExec EntryMode = 0o100755
-	// EntryModeSymlink
+
+	EntryModeBlob    EntryMode = 0o100644
+	EntryModeExec    EntryMode = 0o100755
 	EntryModeSymlink EntryMode = 0o120000
-	// EntryModeCommit
-	EntryModeCommit EntryMode = 0o160000
-	// EntryModeTree
-	EntryModeTree EntryMode = 0o040000
+	EntryModeCommit  EntryMode = 0o160000
+	EntryModeTree    EntryMode = 0o040000
 )
 
 // String converts an EntryMode to a string
@@ -34,12 +30,6 @@ func (e EntryMode) String() string {
 	return strconv.FormatInt(int64(e), 8)
 }
 
-// ToEntryMode converts a string to an EntryMode
-func ToEntryMode(value string) EntryMode {
-	v, _ := strconv.ParseInt(value, 8, 32)
-	return EntryMode(v)
-}
-
 func ParseEntryMode(mode string) (EntryMode, error) {
 	switch mode {
 	case "000000":