Rework repository archive (#14723)

* Use storage to store archive files

* Fix backend lint

* Add archiver table on database

* Finish archive download

* Fix test

* Add database migrations

* Add status for archiver

* Fix lint

* Add queue

* Add doctor to check and delete old archives

* Improve archive queue

* Fix tests

* improve archive storage

* Delete repo archives

* Add missing fixture

* fix fixture

* Fix fixture

* Fix test

* Fix archiver cleaning

* Fix bug

* Add docs for repository archive storage

* remove repo-archive configuration

* Fix test

* Fix test

* Fix lint

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

modules/git/repo_archive.go

@@ -0,0 +1,61 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2020 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 (
+	"context"
+	"fmt"
+	"io"
+	"path/filepath"
+	"strings"
+)
+
+// ArchiveType archive types
+type ArchiveType int
+
+const (
+	// ZIP zip archive type
+	ZIP ArchiveType = iota + 1
+	// TARGZ tar gz archive type
+	TARGZ
+)
+
+// String converts an ArchiveType to string
+func (a ArchiveType) String() string {
+	switch a {
+	case ZIP:
+		return "zip"
+	case TARGZ:
+		return "tar.gz"
+	}
+	return "unknown"
+}
+
+// CreateArchive create archive content to the target path
+func (repo *Repository) CreateArchive(ctx context.Context, format ArchiveType, target io.Writer, usePrefix bool, commitID string) error {
+	if format.String() == "unknown" {
+		return fmt.Errorf("unknown format: %v", format)
+	}
+
+	args := []string{
+		"archive",
+	}
+	if usePrefix {
+		args = append(args, "--prefix="+filepath.Base(strings.TrimSuffix(repo.Path, ".git"))+"/")
+	}
+
+	args = append(args,
+		"--format="+format.String(),
+		commitID,
+	)
+
+	var stderr strings.Builder
+	err := NewCommandContext(ctx, args...).RunInDirPipeline(repo.Path, target, &stderr)
+	if err != nil {
+		return ConcatenateError(err, stderr.String())
+	}
+	return nil
+}