Use native git variants by default with go-git variants as build tag (#13673)

* Move last commit cache back into modules/git

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Remove go-git from the interface for last commit cache

Signed-off-by: Andrew Thornton <art27@cantab.net>

* move cacheref to last_commit_cache

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Remove go-git from routers/private/hook

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Move FindLFSFiles to pipeline

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Make no-go-git variants

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Submodule RefID

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix issue with GetCommitsInfo

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix GetLastCommitForPaths

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Improve efficiency

Signed-off-by: Andrew Thornton <art27@cantab.net>

* More efficiency

Signed-off-by: Andrew Thornton <art27@cantab.net>

* even faster

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Reduce duplication

* As per @lunny

Signed-off-by: Andrew Thornton <art27@cantab.net>

* attempt to fix drone

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix test-tags

Signed-off-by: Andrew Thornton <art27@cantab.net>

* default to use no-go-git variants and add gogit build tag

Signed-off-by: Andrew Thornton <art27@cantab.net>

* placate lint

Signed-off-by: Andrew Thornton <art27@cantab.net>

* as per @6543

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

1 files changed, 110 insertions, 0 deletions

diff --git a/modules/git/repo_commit_gogit.go b/modules/git/repo_commit_gogit.go
new file mode 100644
index 0000000000..48b0cfe19d
--- /dev/null
+++ b/modules/git/repo_commit_gogit.go
@@ -0,0 +1,110 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 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.
+
+// +build gogit
+
+package git
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+// GetRefCommitID returns the last commit ID string of given reference (branch or tag).
+func (repo *Repository) GetRefCommitID(name string) (string, error) {
+	ref, err := repo.gogitRepo.Reference(plumbing.ReferenceName(name), true)
+	if err != nil {
+		if err == plumbing.ErrReferenceNotFound {
+			return "", ErrNotExist{
+				ID: name,
+			}
+		}
+		return "", err
+	}
+
+	return ref.Hash().String(), nil
+}
+
+// IsCommitExist returns true if given commit exists in current repository.
+func (repo *Repository) IsCommitExist(name string) bool {
+	hash := plumbing.NewHash(name)
+	_, err := repo.gogitRepo.CommitObject(hash)
+	return err == nil
+}
+
+func convertPGPSignatureForTag(t *object.Tag) *CommitGPGSignature {
+	if t.PGPSignature == "" {
+		return nil
+	}
+
+	var w strings.Builder
+	var err error
+
+	if _, err = fmt.Fprintf(&w,
+		"object %s\ntype %s\ntag %s\ntagger ",
+		t.Target.String(), t.TargetType.Bytes(), t.Name); err != nil {
+		return nil
+	}
+
+	if err = t.Tagger.Encode(&w); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprintf(&w, "\n\n"); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprintf(&w, t.Message); err != nil {
+		return nil
+	}
+
+	return &CommitGPGSignature{
+		Signature: t.PGPSignature,
+		Payload:   strings.TrimSpace(w.String()) + "\n",
+	}
+}
+
+func (repo *Repository) getCommit(id SHA1) (*Commit, error) {
+	var tagObject *object.Tag
+
+	gogitCommit, err := repo.gogitRepo.CommitObject(id)
+	if err == plumbing.ErrObjectNotFound {
+		tagObject, err = repo.gogitRepo.TagObject(id)
+		if err == plumbing.ErrObjectNotFound {
+			return nil, ErrNotExist{
+				ID: id.String(),
+			}
+		}
+		if err == nil {
+			gogitCommit, err = repo.gogitRepo.CommitObject(tagObject.Target)
+		}
+		// if we get a plumbing.ErrObjectNotFound here then the repository is broken and it should be 500
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	commit := convertCommit(gogitCommit)
+	commit.repo = repo
+
+	if tagObject != nil {
+		commit.CommitMessage = strings.TrimSpace(tagObject.Message)
+		commit.Author = &tagObject.Tagger
+		commit.Signature = convertPGPSignatureForTag(tagObject)
+	}
+
+	tree, err := gogitCommit.Tree()
+	if err != nil {
+		return nil, err
+	}
+
+	commit.Tree.ID = tree.Hash
+	commit.Tree.gogitTree = tree
+
+	return commit, nil
+}