Let package git depend on setting but not opposite (#15241)

* Let package git depend on setting but not opposite

* private some package variables

4 files changed, 78 insertions, 12 deletions

diff --git a/modules/git/command.go b/modules/git/command.go
index 2e375fd4f9..127e95ecfb 100644
--- a/modules/git/command.go
+++ b/modules/git/command.go
@@ -23,8 +23,8 @@ var (
 	// GlobalCommandArgs global command args for external package setting
 	GlobalCommandArgs []string
 
-	// DefaultCommandExecutionTimeout default command execution timeout duration
-	DefaultCommandExecutionTimeout = 360 * time.Second
+	// defaultCommandExecutionTimeout default command execution timeout duration
+	defaultCommandExecutionTimeout = 360 * time.Second
 )
 
 // DefaultLocale is the default LC_ALL to run git commands in.
@@ -111,7 +111,7 @@ func (c *Command) RunInDirTimeoutEnvFullPipeline(env []string, timeout time.Dura
 // it pipes stdout and stderr to given io.Writer and passes in an io.Reader as stdin. Between cmd.Start and cmd.Wait the passed in function is run.
 func (c *Command) RunInDirTimeoutEnvFullPipelineFunc(env []string, timeout time.Duration, dir string, stdout, stderr io.Writer, stdin io.Reader, fn func(context.Context, context.CancelFunc) error) error {
 	if timeout == -1 {
-		timeout = DefaultCommandExecutionTimeout
+		timeout = defaultCommandExecutionTimeout
 	}
 
 	if len(dir) == 0 {
diff --git a/modules/git/git.go b/modules/git/git.go
index ce1b15c953..ef6ec0c2bf 100644
--- a/modules/git/git.go
+++ b/modules/git/git.go
@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/modules/process"
+	"code.gitea.io/gitea/modules/setting"
 
 	"github.com/hashicorp/go-version"
 )
@@ -106,10 +107,42 @@ func SetExecutablePath(path string) error {
 	return nil
 }
 
+// VersionInfo returns git version information
+func VersionInfo() string {
+	var format = "Git Version: %s"
+	var args = []interface{}{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"
+		args = append(args, "Version 2") // for focus color
+	}
+
+	return fmt.Sprintf(format, args...)
+}
+
 // Init initializes git module
 func Init(ctx context.Context) error {
 	DefaultContext = ctx
 
+	defaultCommandExecutionTimeout = time.Duration(setting.Git.Timeout.Default) * time.Second
+
+	if err := SetExecutablePath(setting.Git.Path); err != nil {
+		return err
+	}
+
+	// force cleanup args
+	GlobalCommandArgs = []string{}
+
+	if CheckGitVersionAtLeast("2.9") == nil {
+		// Explicitly disable credential helper, otherwise Git credentials might leak
+		GlobalCommandArgs = append(GlobalCommandArgs, "-c", "credential.helper=")
+	}
+
+	// Since git wire protocol has been released from git v2.18
+	if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
+		GlobalCommandArgs = append(GlobalCommandArgs, "-c", "protocol.version=2")
+	}
+
 	// Save current git version on init to gitVersion otherwise it would require an RWMutex
 	if err := LoadGitVersion(); err != nil {
 		return err
diff --git a/modules/git/lfs.go b/modules/git/lfs.go
new file mode 100644
index 0000000000..79049c9824
--- /dev/null
+++ b/modules/git/lfs.go
@@ -0,0 +1,37 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package git
+
+import (
+	"sync"
+
+	logger "code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+var once sync.Once
+
+// CheckLFSVersion will check lfs version, if not satisfied, then disable it.
+func CheckLFSVersion() {
+	if setting.LFS.StartServer {
+		//Disable LFS client hooks if installed for the current OS user
+		//Needs at least git v2.1.2
+
+		err := LoadGitVersion()
+		if err != nil {
+			logger.Fatal("Error retrieving git version: %v", err)
+		}
+
+		if CheckGitVersionAtLeast("2.1.2") != nil {
+			setting.LFS.StartServer = false
+			logger.Error("LFS server support needs at least Git v2.1.2")
+		} else {
+			once.Do(func() {
+				GlobalCommandArgs = append(GlobalCommandArgs, "-c", "filter.lfs.required=",
+					"-c", "filter.lfs.smudge=", "-c", "filter.lfs.clean=")
+			})
+		}
+	}
+}
diff --git a/modules/git/repo_commit.go b/modules/git/repo_commit.go
index 664a7445dd..815aa141e5 100644
--- a/modules/git/repo_commit.go
+++ b/modules/git/repo_commit.go
@@ -12,6 +12,8 @@ import (
 	"io/ioutil"
 	"strconv"
 	"strings"
+
+	"code.gitea.io/gitea/modules/setting"
 )
 
 // GetBranchCommitID returns last commit ID string of given branch.
@@ -85,12 +87,6 @@ func (repo *Repository) GetCommitByPath(relpath string) (*Commit, error) {
 	return commits.Front().Value.(*Commit), nil
 }
 
-// CommitsRangeSize the default commits range size
-var CommitsRangeSize = 50
-
-// BranchesRangeSize the default branches range size
-var BranchesRangeSize = 20
-
 func (repo *Repository) commitsByRange(id SHA1, page, pageSize int) (*list.List, error) {
 	stdout, err := NewCommand("log", id.String(), "--skip="+strconv.Itoa((page-1)*pageSize),
 		"--max-count="+strconv.Itoa(pageSize), prettyLogFormat).RunInDirBytes(repo.Path)
@@ -206,7 +202,7 @@ func (repo *Repository) FileCommitsCount(revision, file string) (int64, error) {
 
 // CommitsByFileAndRange return the commits according revison file and the page
 func (repo *Repository) CommitsByFileAndRange(revision, file string, page int) (*list.List, error) {
-	skip := (page - 1) * CommitsRangeSize
+	skip := (page - 1) * setting.Git.CommitsRangeSize
 
 	stdoutReader, stdoutWriter := io.Pipe()
 	defer func() {
@@ -216,7 +212,7 @@ func (repo *Repository) CommitsByFileAndRange(revision, file string, page int) (
 	go func() {
 		stderr := strings.Builder{}
 		err := NewCommand("log", revision, "--follow",
-			"--max-count="+strconv.Itoa(CommitsRangeSize*page),
+			"--max-count="+strconv.Itoa(setting.Git.CommitsRangeSize*page),
 			prettyLogFormat, "--", file).
 			RunInDirPipeline(repo.Path, stdoutWriter, &stderr)
 		if err != nil {
@@ -247,7 +243,7 @@ func (repo *Repository) CommitsByFileAndRange(revision, file string, page int) (
 // CommitsByFileAndRangeNoFollow return the commits according revison file and the page
 func (repo *Repository) CommitsByFileAndRangeNoFollow(revision, file string, page int) (*list.List, error) {
 	stdout, err := NewCommand("log", revision, "--skip="+strconv.Itoa((page-1)*50),
-		"--max-count="+strconv.Itoa(CommitsRangeSize), prettyLogFormat, "--", file).RunInDirBytes(repo.Path)
+		"--max-count="+strconv.Itoa(setting.Git.CommitsRangeSize), prettyLogFormat, "--", file).RunInDirBytes(repo.Path)
 	if err != nil {
 		return nil, err
 	}