Refactor modules/git global variables (#29376)

Move some global variables into a struct to improve maintainability

modules/git/git.go

@@ -33,16 +33,18 @@ var (
 	// DefaultContext is the default context to run git commands in, must be initialized by git.InitXxx
 	DefaultContext context.Context
 
+	DefaultFeatures struct {
+		GitVersion *version.Version
+
 		SupportProcReceive bool // >= 2.29
 		SupportHashSha256  bool // >= 2.42, SHA-256 repositories no longer an ‘experimental curiosity’
-
+	}
-	gitVersion *version.Version
 )
 
 // loadGitVersion tries to get the current git version and stores it into a global variable
 func loadGitVersion() error {
 	// doesn't need RWMutex because it's executed by Init()
-	if gitVersion != nil {
+	if DefaultFeatures.GitVersion != nil {
 		return nil
 	}
 
@@ -53,7 +55,7 @@ func loadGitVersion() error {
 
 	ver, err := parseGitVersionLine(strings.TrimSpace(stdout))
 	if err == nil {
-		gitVersion = ver
+		DefaultFeatures.GitVersion = ver
 	}
 	return err
 }
@@ -93,7 +95,7 @@ func SetExecutablePath(path string) error {
 		return err
 	}
 
-	if gitVersion.LessThan(versionRequired) {
+	if DefaultFeatures.GitVersion.LessThan(versionRequired) {
 		moreHint := "get git: https://git-scm.com/download/"
 		if runtime.GOOS == "linux" {
 			// there are a lot of CentOS/RHEL users using old git, so we add a special hint for them
@@ -102,22 +104,22 @@ func SetExecutablePath(path string) error {
 				moreHint = "get git: https://git-scm.com/download/linux and https://ius.io"
 			}
 		}
-		return fmt.Errorf("installed git version %q is not supported, Gitea requires git version >= %q, %s", gitVersion.Original(), RequiredVersion, moreHint)
+		return fmt.Errorf("installed git version %q is not supported, Gitea requires git version >= %q, %s", DefaultFeatures.GitVersion.Original(), RequiredVersion, moreHint)
 	}
 
-	if err = checkGitVersionCompatibility(gitVersion); err != nil {
+	if err = checkGitVersionCompatibility(DefaultFeatures.GitVersion); err != nil {
-		return fmt.Errorf("installed git version %s has a known compatibility issue with Gitea: %w, please upgrade (or downgrade) git", gitVersion.String(), err)
+		return fmt.Errorf("installed git version %s has a known compatibility issue with Gitea: %w, please upgrade (or downgrade) git", DefaultFeatures.GitVersion.String(), err)
 	}
 	return nil
 }
 
 // VersionInfo returns git version information
 func VersionInfo() string {
-	if gitVersion == nil {
+	if DefaultFeatures.GitVersion == nil {
 		return "(git not found)"
 	}
 	format := "%s"
-	args := []any{gitVersion.Original()}
+	args := []any{DefaultFeatures.GitVersion.Original()}
 	// Since git wire protocol has been released from git v2.18
 	if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
 		format += ", Wire Protocol %s Enabled"
@@ -187,9 +189,9 @@ func InitFull(ctx context.Context) (err error) {
 	if CheckGitVersionAtLeast("2.9") == nil {
 		globalCommandArgs = append(globalCommandArgs, "-c", "credential.helper=")
 	}
-	SupportProcReceive = CheckGitVersionAtLeast("2.29") == nil
+	DefaultFeatures.SupportProcReceive = CheckGitVersionAtLeast("2.29") == nil
-	SupportHashSha256 = CheckGitVersionAtLeast("2.42") == nil && !isGogit
+	DefaultFeatures.SupportHashSha256 = CheckGitVersionAtLeast("2.42") == nil && !isGogit
-	if SupportHashSha256 {
+	if DefaultFeatures.SupportHashSha256 {
 		SupportedObjectFormats = append(SupportedObjectFormats, Sha256ObjectFormat)
 	} else {
 		log.Warn("sha256 hash support is disabled - requires Git >= 2.42. Gogit is currently unsupported")
@@ -254,7 +256,7 @@ func syncGitConfig() (err error) {
 		}
 	}
 
-	if SupportProcReceive {
+	if DefaultFeatures.SupportProcReceive {
 		// set support for AGit flow
 		if err := configAddNonExist("receive.procReceiveRefs", "refs/for"); err != nil {
 			return err
@@ -309,15 +311,15 @@ func syncGitConfig() (err error) {
 
 // CheckGitVersionAtLeast check git version is at least the constraint version
 func CheckGitVersionAtLeast(atLeast string) error {
-	if gitVersion == nil {
+	if DefaultFeatures.GitVersion == nil {
 		panic("git module is not initialized") // it shouldn't happen
 	}
 	atLeastVersion, err := version.NewVersion(atLeast)
 	if err != nil {
 		return err
 	}
-	if gitVersion.Compare(atLeastVersion) < 0 {
+	if DefaultFeatures.GitVersion.Compare(atLeastVersion) < 0 {
-		return fmt.Errorf("installed git binary version %s is not at least %s", gitVersion.Original(), atLeast)
+		return fmt.Errorf("installed git binary version %s is not at least %s", DefaultFeatures.GitVersion.Original(), atLeast)
 	}
 	return nil
 }

modules/git/repo.go

@@ -101,7 +101,7 @@ func InitRepository(ctx context.Context, repoPath string, bare bool, objectForma
 	if !IsValidObjectFormat(objectFormatName) {
 		return fmt.Errorf("invalid object format: %s", objectFormatName)
 	}
-	if SupportHashSha256 {
+	if DefaultFeatures.SupportHashSha256 {
 		cmd.AddOptionValues("--object-format", objectFormatName)
 	}
 

routers/private/hook_post_receive.go

@@ -124,7 +124,7 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 
 		// post update for agit pull request
 		// FIXME: use pr.Flow to test whether it's an Agit PR or a GH PR
-		if git.SupportProcReceive && refFullName.IsPull() {
+		if git.DefaultFeatures.SupportProcReceive && refFullName.IsPull() {
 			if repo == nil {
 				repo = loadRepository(ctx, ownerName, repoName)
 				if ctx.Written() {

routers/private/hook_pre_receive.go

@@ -122,7 +122,7 @@ func HookPreReceive(ctx *gitea_context.PrivateContext) {
 			preReceiveBranch(ourCtx, oldCommitID, newCommitID, refFullName)
 		case refFullName.IsTag():
 			preReceiveTag(ourCtx, oldCommitID, newCommitID, refFullName)
-		case git.SupportProcReceive && refFullName.IsFor():
+		case git.DefaultFeatures.SupportProcReceive && refFullName.IsFor():
 			preReceiveFor(ourCtx, oldCommitID, newCommitID, refFullName)
 		default:
 			ourCtx.AssertCanWriteCode()

routers/private/hook_proc_receive.go

@@ -18,7 +18,7 @@ import (
 // HookProcReceive proc-receive hook - only handles agit Proc-Receive requests at present
 func HookProcReceive(ctx *gitea_context.PrivateContext) {
 	opts := web.GetForm(ctx).(*private.HookOptions)
-	if !git.SupportProcReceive {
+	if !git.DefaultFeatures.SupportProcReceive {
 		ctx.Status(http.StatusNotFound)
 		return
 	}

routers/private/serv.go

@@ -297,7 +297,7 @@ func ServCommand(ctx *context.PrivateContext) {
 			}
 		} else {
 			// Because of the special ref "refs/for" we will need to delay write permission check
-			if git.SupportProcReceive && unitType == unit.TypeCode {
+			if git.DefaultFeatures.SupportProcReceive && unitType == unit.TypeCode {
 				mode = perm.AccessModeRead
 			}
 

routers/web/misc/misc.go

@@ -15,7 +15,7 @@ import (
 )
 
 func SSHInfo(rw http.ResponseWriter, req *http.Request) {
-	if !git.SupportProcReceive {
+	if !git.DefaultFeatures.SupportProcReceive {
 		rw.WriteHeader(http.StatusNotFound)
 		return
 	}

routers/web/repo/githttp.go

@@ -183,7 +183,7 @@ func httpBase(ctx *context.Context) *serviceHandler {
 
 		if repoExist {
 			// Because of special ref "refs/for" .. , need delay write permission check
-			if git.SupportProcReceive {
+			if git.DefaultFeatures.SupportProcReceive {
 				accessMode = perm.AccessModeRead
 			}