Refactor git module, make Gitea use internal git config

integrations/integration_test.go

@@ -261,8 +261,8 @@ func prepareTestEnv(t testing.TB, skip ...int) func() {
 	deferFn := PrintCurrentTest(t, ourSkip)
 	assert.NoError(t, unittest.LoadFixtures())
 	assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
-
 	assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "integrations/gitea-repositories-meta"), setting.RepoRootPath))
+	assert.NoError(t, git.Init(context.Background()))
 	ownerDirs, err := os.ReadDir(setting.RepoRootPath)
 	if err != nil {
 		assert.NoError(t, err, "unable to read the new repo root: %v\n", err)
@@ -563,6 +563,7 @@ func resetFixtures(t *testing.T) {
 	assert.NoError(t, unittest.LoadFixtures())
 	assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
 	assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "integrations/gitea-repositories-meta"), setting.RepoRootPath))
+	assert.NoError(t, git.Init(context.Background()))
 	ownerDirs, err := os.ReadDir(setting.RepoRootPath)
 	if err != nil {
 		assert.NoError(t, err, "unable to read the new repo root: %v\n", err)

integrations/migration-test/migration_test.go

@@ -62,6 +62,7 @@ func initMigrationTest(t *testing.T) func() {
 	assert.True(t, len(setting.RepoRootPath) != 0)
 	assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
 	assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "integrations/gitea-repositories-meta"), setting.RepoRootPath))
+	assert.NoError(t, git.Init(context.Background()))
 	ownerDirs, err := os.ReadDir(setting.RepoRootPath)
 	if err != nil {
 		assert.NoError(t, err, "unable to read the new repo root: %v\n", err)

models/migrations/migrations_test.go

@@ -202,9 +202,8 @@ func prepareTestEnv(t *testing.T, skip int, syncModels ...interface{}) (*xorm.En
 	ourSkip += skip
 	deferFn := PrintCurrentTest(t, ourSkip)
 	assert.NoError(t, os.RemoveAll(setting.RepoRootPath))
-
-	assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "integrations/gitea-repositories-meta"),
-		setting.RepoRootPath))
+	assert.NoError(t, unittest.CopyDir(path.Join(filepath.Dir(setting.AppPath), "integrations/gitea-repositories-meta"), setting.RepoRootPath))
+	assert.NoError(t, git.Init(context.Background()))
 	ownerDirs, err := os.ReadDir(setting.RepoRootPath)
 	if err != nil {
 		assert.NoError(t, err, "unable to read the new repo root: %v\n", err)

models/unittest/testdb.go

@@ -14,6 +14,7 @@ import (
 
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/modules/util"
@@ -106,6 +107,10 @@ func MainTest(m *testing.M, testOpts *TestOptions) {
 
 	setting.Packages.Storage.Path = filepath.Join(setting.AppDataPath, "packages")
 
+	if err = git.Init(context.Background()); err != nil {
+		fatalTestError("git.Init: %v\n", err)
+	}
+
 	if err = storage.Init(); err != nil {
 		fatalTestError("storage.Init: %v\n", err)
 	}
@@ -198,6 +203,7 @@ func PrepareTestEnv(t testing.TB) {
 	assert.NoError(t, util.RemoveAll(setting.RepoRootPath))
 	metaPath := filepath.Join(giteaRoot, "integrations", "gitea-repositories-meta")
 	assert.NoError(t, CopyDir(metaPath, setting.RepoRootPath))
+	assert.NoError(t, git.Init(context.Background()))
 
 	ownerDirs, err := os.ReadDir(setting.RepoRootPath)
 	assert.NoError(t, err)

modules/git/command.go

@@ -8,10 +8,12 @@ package git
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"strings"
 	"time"
 	"unsafe"
@@ -148,13 +150,21 @@ func (c *Command) Run(opts *RunOpts) error {
 		cmd.Env = opts.Env
 	}
 
+	if GlobalConfigFile == "" {
+		// TODO: now, some unit test code call the git module directly without initialization, which is incorrect.
+		// at the moment, we just use a temp gitconfig to prevent from conflicting with user's gitconfig
+		// in future, the git module should be initialized first before use.
+		GlobalConfigFile = filepath.Join(os.TempDir(), "/gitea-temp-gitconfig")
+		log.Warn("GlobalConfigFile is empty, the git module is not initialized correctly, using a temp gitconfig (%s) temporarily", GlobalConfigFile)
+	}
+
 	cmd.Env = append(
 		cmd.Env,
 		fmt.Sprintf("LC_ALL=%s", DefaultLocale),
-		// avoid prompting for credentials interactively, supported since git v2.3
-		"GIT_TERMINAL_PROMPT=0",
-		// ignore replace references (https://git-scm.com/docs/git-replace)
-		"GIT_NO_REPLACE_OBJECTS=1",
+		"GIT_TERMINAL_PROMPT=0",               // avoid prompting for credentials interactively, supported since git v2.3
+		"GIT_NO_REPLACE_OBJECTS=1",            // ignore replace references (https://git-scm.com/docs/git-replace)
+		"GIT_CONFIG_NOSYSTEM=1",               // https://git-scm.com/docs/git-config
+		"GIT_CONFIG_GLOBAL="+GlobalConfigFile, // make Gitea use internal git config only, to prevent conflicts with user's git config
 	)
 
 	cmd.Dir = opts.Dir
@@ -183,7 +193,9 @@ func (c *Command) Run(opts *RunOpts) error {
 
 type RunStdError interface {
 	error
+	Unwrap() error
 	Stderr() string
+	IsExitCode(code int) bool
 }
 
 type runStdError struct {
@@ -208,6 +220,14 @@ func (r *runStdError) Stderr() string {
 	return r.stderr
 }
 
+func (r *runStdError) IsExitCode(code int) bool {
+	var exitError *exec.ExitError
+	if errors.As(r.err, &exitError) {
+		return exitError.ExitCode() == code
+	}
+	return false
+}
+
 func bytesToString(b []byte) string {
 	return *(*string)(unsafe.Pointer(&b)) // that's what Golang's strings.Builder.String() does (go/src/strings/builder.go)
 }

modules/git/commit.go

@@ -398,11 +398,6 @@ func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
 
 // GetBranchName gets the closest branch name (as returned by 'git name-rev --name-only')
 func (c *Commit) GetBranchName() (string, error) {
-	err := LoadGitVersion()
-	if err != nil {
-		return "", fmt.Errorf("Git version missing: %v", err)
-	}
-
 	args := []string{
 		"name-rev",
 	}