Accept git 1.7.2 as the minimum version

.drone.yml

@@ -10,15 +10,26 @@ clone:
     tags: true
 
 pipeline:
-  testing:
+  test-general:
     image: webhippie/golang:edge
     pull: true
     commands:
       - make clean
       - make vet
       - make lint
-      - make test
       - make build
+  testing-git-latest:
+    image: webhippie/golang:edge
+    pull: true
+    commands:
+      - git update-ref refs/heads/test HEAD
+      - git --version && make test
+  testing-git-1.7:
+    image: docker.kbt.io/gitea-git-ci:1.7
+    pull: true
+    commands:
+      - git update-ref refs/heads/test HEAD
+      - PATH=/opt/git-1.7.2/bin git --version && make test
 
   # coverage:
   #   image: plugins/coverage:1

commit_test.go

@@ -0,0 +1,15 @@
+// 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 (
+	"testing"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCommitsCount(t *testing.T) {
+	commitsCount, _ := CommitsCount(".", "d86a90f801dbe279db095437a8c7ea42c60e8d98")
+	assert.Equal(t, int64(3), commitsCount)
+}

docker/ci/Dockerfile-git-1.7

@@ -0,0 +1,11 @@
+FROM webhippie/golang:edge
+RUN apk add --update autoconf zlib-dev > /dev/null && \
+    mkdir build && \
+    curl -sL "https://github.com/git/git/archive/v1.7.2.tar.gz" -o git.tar.gz && \
+    tar -C build -xzf git.tar.gz && \
+    cd build/git-1.7.2 && \
+    { autoconf 2> err || { cat err && false; } } && \
+    ./configure --without-tcltk --prefix=/opt/git-1.7.2 > /dev/null && \
+    { make install NO_PERL=please > /dev/null 2> err || { cat err && false; } } && \
+    cd ../.. && \
+    rm -rf build git.tar.gz \

docker/ci/Makefile

@@ -0,0 +1,2 @@
+git-1.7:
+	docker build -t gitea/ci:git-1.7 -f Dockerfile-git-1.7 .

git.go

@@ -25,7 +25,7 @@ var (
 	// Prefix the log prefix
 	Prefix = "[git-module] "
 	// GitVersionRequired is the minimum Git version required
-	GitVersionRequired = "1.8.1.6"
+	GitVersionRequired = "1.7.2"
 )
 
 func log(format string, args ...interface{}) {

repo_test.go

@@ -0,0 +1,25 @@
+// 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 (
+	"testing"
+	"time"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetLatestCommitTime(t *testing.T) {
+	lct, err := GetLatestCommitTime(".")
+	assert.NoError(t, err)
+	// Time is in the past
+	now := time.Now()
+	assert.True(t, lct.Unix() < now.Unix(), "%d not smaller than %d", lct, now)
+	// Time is after Mon Oct 23 03:52:09 2017 +0300
+	// which is the time of commit
+	// d47b98c44c9a6472e44ab80efe65235e11c6da2a
+	refTime, err := time.Parse("Mon Jan 02 15:04:05 2006 -0700", "Mon Oct 23 03:52:09 2017 +0300")
+	assert.NoError(t, err)
+	assert.True(t, lct.Unix() > refTime.Unix(), "%d not greater than %d", lct, refTime)
+}