[Vendor] Switch go-version lib (#12719)

* vendor: switch from "mcuadros/go-version" to "hashicorp/go-version"

* Adapt P1

* simplify

* fix lint

* adapt

* fix lint & rm old code

* no deadlock

* rm RWMutex and check GoVersion only 1-time

* Copyright header

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

7 files changed, 76 insertions, 41 deletions

diff --git a/modules/git/command.go b/modules/git/command.go
index 2a00a0a203..e0170b1723 100644
--- a/modules/git/command.go
+++ b/modules/git/command.go
@@ -1,3 +1,4 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
 // Copyright 2015 The Gogs Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
@@ -11,12 +12,10 @@ import (
 	"io"
 	"os"
 	"os/exec"
-	"runtime"
 	"strings"
 	"time"
 
 	"code.gitea.io/gitea/modules/process"
-	"github.com/mcuadros/go-version"
 )
 
 var (
@@ -132,7 +131,7 @@ func (c *Command) RunInDirTimeoutEnvFullPipelineFunc(env []string, timeout time.
 	}
 
 	// TODO: verify if this is still needed in golang 1.15
-	if version.Compare(runtime.Version(), "go1.15", "<") {
+	if goVersionLessThan115 {
 		cmd.Env = append(cmd.Env, "GODEBUG=asyncpreemptoff=1")
 	}
 	cmd.Dir = dir
diff --git a/modules/git/commit.go b/modules/git/commit.go
index 2ae35c9f58..6d2bc2b02c 100644
--- a/modules/git/commit.go
+++ b/modules/git/commit.go
@@ -21,7 +21,6 @@ import (
 	"strings"
 
 	"github.com/go-git/go-git/v5/plumbing/object"
-	"github.com/mcuadros/go-version"
 )
 
 // Commit represents a git commit.
@@ -470,7 +469,7 @@ 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) {
-	binVersion, err := BinVersion()
+	err := LoadGitVersion()
 	if err != nil {
 		return "", fmt.Errorf("Git version missing: %v", err)
 	}
@@ -478,7 +477,7 @@ func (c *Commit) GetBranchName() (string, error) {
 	args := []string{
 		"name-rev",
 	}
-	if version.Compare(binVersion, "2.13.0", ">=") {
+	if CheckGitVersionConstraint(">= 2.13.0") == nil {
 		args = append(args, "--exclude", "refs/tags/*")
 	}
 	args = append(args, "--name-only", "--no-undefined", c.ID.String())
diff --git a/modules/git/git.go b/modules/git/git.go
index 1061bdb0d5..a9ff923cc5 100644
--- a/modules/git/git.go
+++ b/modules/git/git.go
@@ -15,14 +15,9 @@ import (
 
 	"code.gitea.io/gitea/modules/process"
 
-	"github.com/mcuadros/go-version"
+	"github.com/hashicorp/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.
@@ -39,7 +34,10 @@ var (
 	// DefaultContext is the default context to run git commands in
 	DefaultContext = context.Background()
 
-	gitVersion string
+	gitVersion *version.Version
+
+	// will be checked on Init
+	goVersionLessThan115 = true
 )
 
 func log(format string, args ...interface{}) {
@@ -55,31 +53,43 @@ func log(format string, args ...interface{}) {
 	}
 }
 
-// BinVersion returns current Git version from shell.
-func BinVersion() (string, error) {
-	if len(gitVersion) > 0 {
-		return gitVersion, nil
+// LocalVersion returns current Git version from shell.
+func LocalVersion() (*version.Version, error) {
+	if err := LoadGitVersion(); err != nil {
+		return nil, err
+	}
+	return gitVersion, nil
+}
+
+// LoadGitVersion returns current Git version from shell.
+func LoadGitVersion() error {
+	// doesn't need RWMutex because its exec by Init()
+	if gitVersion != nil {
+		return nil
 	}
 
 	stdout, err := NewCommand("version").Run()
 	if err != nil {
-		return "", err
+		return err
 	}
 
 	fields := strings.Fields(stdout)
 	if len(fields) < 3 {
-		return "", fmt.Errorf("not enough output: %s", stdout)
+		return fmt.Errorf("not enough output: %s", stdout)
 	}
 
+	var versionString string
+
 	// Handle special case on Windows.
 	i := strings.Index(fields[2], "windows")
 	if i >= 1 {
-		gitVersion = fields[2][:i-1]
-		return gitVersion, nil
+		versionString = fields[2][:i-1]
+	} else {
+		versionString = fields[2]
 	}
 
-	gitVersion = fields[2]
-	return gitVersion, nil
+	gitVersion, err = version.NewVersion(versionString)
+	return err
 }
 
 // SetExecutablePath changes the path of git executable and checks the file permission and version.
@@ -94,11 +104,17 @@ func SetExecutablePath(path string) error {
 	}
 	GitExecutable = absPath
 
-	gitVersion, err := BinVersion()
+	err = LoadGitVersion()
 	if err != nil {
 		return fmt.Errorf("Git version missing: %v", err)
 	}
-	if version.Compare(gitVersion, GitVersionRequired, "<") {
+
+	versionRequired, err := version.NewVersion(GitVersionRequired)
+	if err != nil {
+		return err
+	}
+
+	if gitVersion.LessThan(versionRequired) {
 		return fmt.Errorf("Git version not supported. Requires version > %v", GitVersionRequired)
 	}
 
@@ -108,6 +124,20 @@ func SetExecutablePath(path string) error {
 // Init initializes git module
 func Init(ctx context.Context) error {
 	DefaultContext = ctx
+
+	// Save current git version on init to gitVersion otherwise it would require an RWMutex
+	if err := LoadGitVersion(); err != nil {
+		return err
+	}
+
+	// Save if the go version used to compile gitea is greater or equal 1.15
+	runtimeVersion, err := version.NewVersion(strings.TrimPrefix(runtime.Version(), "go"))
+	if err != nil {
+		return err
+	}
+	version115, _ := version.NewVersion("1.15")
+	goVersionLessThan115 = runtimeVersion.LessThan(version115)
+
 	// Git requires setting user.name and user.email in order to commit changes - if they're not set just add some defaults
 	for configKey, defaultValue := range map[string]string{"user.name": "Gitea", "user.email": "gitea@fake.local"} {
 		if err := checkAndSetConfig(configKey, defaultValue, false); err != nil {
@@ -120,13 +150,13 @@ func Init(ctx context.Context) error {
 		return err
 	}
 
-	if version.Compare(gitVersion, "2.10", ">=") {
+	if CheckGitVersionConstraint(">= 2.10") == nil {
 		if err := checkAndSetConfig("receive.advertisePushOptions", "true", true); err != nil {
 			return err
 		}
 	}
 
-	if version.Compare(gitVersion, "2.18", ">=") {
+	if CheckGitVersionConstraint(">= 2.18") == nil {
 		if err := checkAndSetConfig("core.commitGraph", "true", true); err != nil {
 			return err
 		}
@@ -143,6 +173,21 @@ func Init(ctx context.Context) error {
 	return nil
 }
 
+// CheckGitVersionConstraint check version constrain against local installed git version
+func CheckGitVersionConstraint(constraint string) error {
+	if err := LoadGitVersion(); err != nil {
+		return err
+	}
+	check, err := version.NewConstraint(constraint)
+	if err != nil {
+		return err
+	}
+	if !check.Check(gitVersion) {
+		return fmt.Errorf("installed git binary  %s does not satisfy version constraint %s", gitVersion.Original(), constraint)
+	}
+	return nil
+}
+
 func checkAndSetConfig(key, defaultValue string, forceToDefault bool) error {
 	stdout, stderr, err := process.GetManager().Exec("git.Init(get setting)", GitExecutable, "config", "--get", key)
 	if err != nil {
diff --git a/modules/git/repo_attribute.go b/modules/git/repo_attribute.go
index c10c96f558..7522b0dc82 100644
--- a/modules/git/repo_attribute.go
+++ b/modules/git/repo_attribute.go
@@ -7,8 +7,6 @@ package git
 import (
 	"bytes"
 	"fmt"
-
-	"github.com/mcuadros/go-version"
 )
 
 // CheckAttributeOpts represents the possible options to CheckAttribute
@@ -21,7 +19,7 @@ type CheckAttributeOpts struct {
 
 // CheckAttribute return the Blame object of file
 func (repo *Repository) CheckAttribute(opts CheckAttributeOpts) (map[string]map[string]string, error) {
-	binVersion, err := BinVersion()
+	err := LoadGitVersion()
 	if err != nil {
 		return nil, fmt.Errorf("Git version missing: %v", err)
 	}
@@ -42,7 +40,7 @@ func (repo *Repository) CheckAttribute(opts CheckAttributeOpts) (map[string]map[
 	}
 
 	// git check-attr --cached first appears in git 1.7.8
-	if opts.CachedOnly && version.Compare(binVersion, "1.7.8", ">=") {
+	if opts.CachedOnly && CheckGitVersionConstraint(">= 1.7.8") == nil {
 		cmdArgs = append(cmdArgs, "--cached")
 	}
 
diff --git a/modules/git/repo_commit.go b/modules/git/repo_commit.go
index 4f04b2d363..45745c8088 100644
--- a/modules/git/repo_commit.go
+++ b/modules/git/repo_commit.go
@@ -14,7 +14,6 @@ import (
 
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
-	"github.com/mcuadros/go-version"
 )
 
 // GetRefCommitID returns the last commit ID string of given reference (branch or tag).
@@ -470,7 +469,7 @@ func (repo *Repository) getCommitsBeforeLimit(id SHA1, num int) (*list.List, err
 }
 
 func (repo *Repository) getBranches(commit *Commit, limit int) ([]string, error) {
-	if version.Compare(gitVersion, "2.7.0", ">=") {
+	if CheckGitVersionConstraint(">= 2.7.0") == nil {
 		stdout, err := NewCommand("for-each-ref", "--count="+strconv.Itoa(limit), "--format=%(refname:strip=2)", "--contains", commit.ID.String(), BranchPrefix).RunInDir(repo.Path)
 		if err != nil {
 			return nil, err
diff --git a/modules/git/repo_tag.go b/modules/git/repo_tag.go
index 7780e3477d..376a699502 100644
--- a/modules/git/repo_tag.go
+++ b/modules/git/repo_tag.go
@@ -10,7 +10,6 @@ import (
 	"strings"
 
 	"github.com/go-git/go-git/v5/plumbing"
-	"github.com/mcuadros/go-version"
 )
 
 // TagPrefix tags prefix path on the repository
@@ -239,8 +238,6 @@ func (repo *Repository) GetTags() ([]string, error) {
 		return nil
 	})
 
-	version.Sort(tagNames)
-
 	// Reverse order
 	for i := 0; i < len(tagNames)/2; i++ {
 		j := len(tagNames) - i - 1
diff --git a/modules/git/repo_tree.go b/modules/git/repo_tree.go
index 8f91f4efac..a662aaab4f 100644
--- a/modules/git/repo_tree.go
+++ b/modules/git/repo_tree.go
@@ -11,8 +11,6 @@ import (
 	"os"
 	"strings"
 	"time"
-
-	"github.com/mcuadros/go-version"
 )
 
 func (repo *Repository) getTree(id SHA1) (*Tree, error) {
@@ -65,7 +63,7 @@ type CommitTreeOpts struct {
 
 // CommitTree creates a commit from a given tree id for the user with provided message
 func (repo *Repository) CommitTree(sig *Signature, tree *Tree, opts CommitTreeOpts) (SHA1, error) {
-	binVersion, err := BinVersion()
+	err := LoadGitVersion()
 	if err != nil {
 		return SHA1{}, err
 	}
@@ -91,11 +89,11 @@ func (repo *Repository) CommitTree(sig *Signature, tree *Tree, opts CommitTreeOp
 	_, _ = messageBytes.WriteString(opts.Message)
 	_, _ = messageBytes.WriteString("\n")
 
-	if version.Compare(binVersion, "1.7.9", ">=") && (opts.KeyID != "" || opts.AlwaysSign) {
+	if CheckGitVersionConstraint(">= 1.7.9") == nil && (opts.KeyID != "" || opts.AlwaysSign) {
 		cmd.AddArguments(fmt.Sprintf("-S%s", opts.KeyID))
 	}
 
-	if version.Compare(binVersion, "2.0.0", ">=") && opts.NoGPGSign {
+	if CheckGitVersionConstraint(">= 2.0.0") == nil && opts.NoGPGSign {
 		cmd.AddArguments("--no-gpg-sign")
 	}