move code.gitea.io/git to code.gitea.io/gitea/modules/git (#6364)

* move code.gitea.io/git to code.gitea.io/gitea/modules/git

* fix imports

* fix fmt

* fix misspell

* remove wrong tests data

* fix unit tests

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* enable Debug to trace the failure tests

* fix tests

* fix tests

* fix tests

* fix tests

* fix tests

* comment commit count tests since git clone depth is 50

* fix tests

* update from code.gitea.io/git

* revert change to makefile

modules/git/git.go

@@ -0,0 +1,91 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2017 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 (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/mcuadros/go-version"
+)
+
+// Version return this package's current version
+func Version() string {
+	return "0.4.2"
+}
+
+var (
+	// Debug enables verbose logging on everything.
+	// This should be false in case Gogs starts in SSH mode.
+	Debug = false
+	// Prefix the log prefix
+	Prefix = "[git-module] "
+	// GitVersionRequired is the minimum Git version required
+	GitVersionRequired = "1.7.2"
+)
+
+func log(format string, args ...interface{}) {
+	if !Debug {
+		return
+	}
+
+	fmt.Print(Prefix)
+	if len(args) == 0 {
+		fmt.Println(format)
+	} else {
+		fmt.Printf(format+"\n", args...)
+	}
+}
+
+var gitVersion string
+
+// BinVersion returns current Git version from shell.
+func BinVersion() (string, error) {
+	if len(gitVersion) > 0 {
+		return gitVersion, nil
+	}
+
+	stdout, err := NewCommand("version").Run()
+	if err != nil {
+		return "", err
+	}
+
+	fields := strings.Fields(stdout)
+	if len(fields) < 3 {
+		return "", fmt.Errorf("not enough output: %s", stdout)
+	}
+
+	// Handle special case on Windows.
+	i := strings.Index(fields[2], "windows")
+	if i >= 1 {
+		gitVersion = fields[2][:i-1]
+		return gitVersion, nil
+	}
+
+	gitVersion = fields[2]
+	return gitVersion, nil
+}
+
+func init() {
+	gitVersion, err := BinVersion()
+	if err != nil {
+		panic(fmt.Sprintf("Git version missing: %v", err))
+	}
+	if version.Compare(gitVersion, GitVersionRequired, "<") {
+		panic(fmt.Sprintf("Git version not supported. Requires version > %v", GitVersionRequired))
+	}
+}
+
+// Fsck verifies the connectivity and validity of the objects in the database
+func Fsck(repoPath string, timeout time.Duration, args ...string) error {
+	// Make sure timeout makes sense.
+	if timeout <= 0 {
+		timeout = -1
+	}
+	_, err := NewCommand("fsck").AddArguments(args...).RunInDirTimeout(timeout, repoPath)
+	return err
+}