Use native git variants by default with go-git variants as build tag

.drone.yml

@@ -33,6 +33,16 @@ steps:
       GOSUMDB: sum.golang.org
       TAGS: bindata sqlite sqlite_unlock_notify
 
+  - name: lint-backend-gogit
+    pull: always
+    image: golang:1.15
+    commands:
+      - make lint-backend
+    environment:
+      GOPROXY: https://goproxy.cn # proxy.golang.org is blocked in China, this proxy is not
+      GOSUMDB: sum.golang.org
+      TAGS: bindata gogit sqlite sqlite_unlock_notify
+
   - name: checks-frontend
     image: node:14
     commands:
@@ -69,7 +79,7 @@ steps:
       GOPROXY: off
       GOOS: linux
       GOARCH: arm64
-      TAGS: bindata
+      TAGS: bindata gogit
     commands:
       - make backend # test cross compile
       - rm ./gitea # clean
@@ -173,6 +183,17 @@ steps:
       GITHUB_READ_TOKEN:
         from_secret: github_read_token
 
+  - name: unit-test-gogit
+    pull: always
+    image: golang:1.15
+    commands:
+      - make unit-test-coverage test-check
+    environment:
+      GOPROXY: off
+      TAGS: bindata gogit sqlite sqlite_unlock_notify
+      GITHUB_READ_TOKEN:
+        from_secret: github_read_token
+
   - name: test-mysql
     image: golang:1.15
     commands:
@@ -305,7 +326,8 @@ steps:
       - timeout -s ABRT 40m make test-sqlite-migration test-sqlite
     environment:
       GOPROXY: off
-      TAGS: bindata
+      TAGS: bindata gogit sqlite sqlite_unlock_notify
+      TEST_TAGS: gogit sqlite sqlite_unlock_notify
       USE_REPO_TEST_DIR: 1
     depends_on:
       - build
@@ -318,7 +340,8 @@ steps:
       - timeout -s ABRT 40m make test-pgsql-migration test-pgsql
     environment:
       GOPROXY: off
-      TAGS: bindata
+      TAGS: bindata gogit
+      TEST_TAGS: gogit
       TEST_LDAP: 1
       USE_REPO_TEST_DIR: 1
     depends_on:

Makefile

@@ -110,7 +110,10 @@ TAGS ?=
 TAGS_SPLIT := $(subst $(COMMA), ,$(TAGS))
 TAGS_EVIDENCE := $(MAKE_EVIDENCE_DIR)/tags
 
+TEST_TAGS ?= sqlite sqlite_unlock_notify
+
 GO_DIRS := cmd integrations models modules routers build services vendor tools
+
 GO_SOURCES := $(wildcard *.go)
 GO_SOURCES += $(shell find $(GO_DIRS) -type f -name "*.go" -not -path modules/options/bindata.go -not -path modules/public/bindata.go -not -path modules/templates/bindata.go)
 
@@ -339,8 +342,8 @@ watch-backend: go-check
 
 .PHONY: test
 test:
-	@echo "Running go test..."
-	@$(GO) test $(GOTESTFLAGS) -mod=vendor -tags='sqlite sqlite_unlock_notify' $(GO_PACKAGES)
+	@echo "Running go test with -tags '$(TEST_TAGS)'..."
+	@$(GO) test $(GOTESTFLAGS) -mod=vendor -tags='$(TEST_TAGS)' $(GO_PACKAGES)
 
 .PHONY: test-check
 test-check:
@@ -356,17 +359,17 @@ test-check:
 
 .PHONY: test\#%
 test\#%:
-	@echo "Running go test..."
-	@$(GO) test -mod=vendor -tags='sqlite sqlite_unlock_notify' -run $(subst .,/,$*) $(GO_PACKAGES)
+	@echo "Running go test with -tags '$(TEST_TAGS)'..."
+	@$(GO) test -mod=vendor -tags='$(TEST_TAGS)' -run $(subst .,/,$*) $(GO_PACKAGES)
 
 .PHONY: coverage
 coverage:
 	GO111MODULE=on $(GO) run -mod=vendor build/gocovmerge.go integration.coverage.out $(shell find . -type f -name "coverage.out") > coverage.all
 
 .PHONY: unit-test-coverage
 unit-test-coverage:
-	@echo "Running unit-test-coverage..."
-	@$(GO) test $(GOTESTFLAGS) -mod=vendor -tags='sqlite sqlite_unlock_notify' -cover -coverprofile coverage.out $(GO_PACKAGES) && echo "\n==>\033[32m Ok\033[m\n" || exit 1
+	@echo "Running unit-test-coverage -tags '$(TEST_TAGS)'..."
+	@$(GO) test $(GOTESTFLAGS) -mod=vendor -tags='$(TEST_TAGS)' -cover -coverprofile coverage.out $(GO_PACKAGES) && echo "\n==>\033[32m Ok\033[m\n" || exit 1
 
 .PHONY: vendor
 vendor:
@@ -511,7 +514,7 @@ integrations.mssql.test: git-check $(GO_SOURCES)
 	$(GO) test $(GOTESTFLAGS) -mod=vendor -c code.gitea.io/gitea/integrations -o integrations.mssql.test
 
 integrations.sqlite.test: git-check $(GO_SOURCES)
-	$(GO) test $(GOTESTFLAGS) -mod=vendor -c code.gitea.io/gitea/integrations -o integrations.sqlite.test -tags 'sqlite sqlite_unlock_notify'
+	$(GO) test $(GOTESTFLAGS) -mod=vendor -c code.gitea.io/gitea/integrations -o integrations.sqlite.test -tags '$(TEST_TAGS)'
 
 integrations.cover.test: git-check $(GO_SOURCES)
 	$(GO) test $(GOTESTFLAGS) -mod=vendor -c code.gitea.io/gitea/integrations -coverpkg $(shell echo $(GO_PACKAGES) | tr ' ' ',') -o integrations.cover.test
@@ -534,7 +537,7 @@ migrations.mssql.test: $(GO_SOURCES)
 
 .PHONY: migrations.sqlite.test
 migrations.sqlite.test: $(GO_SOURCES)
-	$(GO) test $(GOTESTFLAGS) -c code.gitea.io/gitea/integrations/migration-test -o migrations.sqlite.test -tags 'sqlite sqlite_unlock_notify'
+	$(GO) test $(GOTESTFLAGS) -c code.gitea.io/gitea/integrations/migration-test -o migrations.sqlite.test -tags '$(TEST_TAGS)'
 
 .PHONY: check
 check: test

docs/content/doc/installation/from-source.en-us.md

@@ -101,6 +101,7 @@ Depending on requirements, the following build tags can be included.
 - `pam`: Enable support for PAM (Linux Pluggable Authentication Modules). Can
   be used to authenticate local users or extend authentication to methods
   available to PAM.
+* `gogit`: (EXPERIMENTAL) Use go-git variants of git commands.
 
 Bundling assets into the binary using the `bindata` build tag is recommended for
 production deployments. It is possible to serve the static assets directly via a reverse proxy,

modules/cache/cache.go

@@ -27,6 +27,24 @@ func newCache(cacheConfig setting.Cache) (mc.Cache, error) {
 	})
 }
 
+// Cache is the interface that operates the cache data.
+type Cache interface {
+	// Put puts value into cache with key and expire time.
+	Put(key string, val interface{}, timeout int64) error
+	// Get gets cached value by given key.
+	Get(key string) interface{}
+	// Delete deletes cached value by given key.
+	Delete(key string) error
+	// Incr increases cached int-type value by given key as a counter.
+	Incr(key string) error
+	// Decr decreases cached int-type value by given key as a counter.
+	Decr(key string) error
+	// IsExist returns true if cached value exists.
+	IsExist(key string) bool
+	// Flush deletes all cached data.
+	Flush() error
+}
+
 // NewContext start cache service
 func NewContext() error {
 	var err error
@@ -40,6 +58,11 @@ func NewContext() error {
 	return err
 }
 
+// GetCache returns the currently configured cache
+func GetCache() Cache {
+	return conn
+}
+
 // GetString returns the key value from cache with callback when no key exists in cache
 func GetString(key string, getFunc func() (string, error)) (string, error) {
 	if conn == nil || setting.CacheService.TTL == 0 {

modules/convert/git_commit_test.go

@@ -13,15 +13,14 @@ import (
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
 
-	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestToCommitMeta(t *testing.T) {
 	assert.NoError(t, models.PrepareTestDatabase())
 	headRepo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
 	sha1, _ := git.NewIDFromString("0000000000000000000000000000000000000000")
-	signature := &object.Signature{Name: "Test Signature", Email: "[email protected]", When: time.Unix(0, 0)}
+	signature := &git.Signature{Name: "Test Signature", Email: "[email protected]", When: time.Unix(0, 0)}
 	tag := &git.Tag{
 		Name:    "Test Tag",
 		ID:      sha1,