Enable Github Action CI (apache#170)

Signed-off-by: xiaolong.ran <rxl@apache.org>

Master Issue: apache#169 

### Modifications

- Replace Apache Jenkins with Github Action CI

.github/workflows/go.yml

@@ -1,28 +1,21 @@
 name: Go
-on: [push]
+on: [pull_request]
 jobs:
 
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.12
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.12
       id: go
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v1
 
-    - name: Get dependencies
+    - name: Test
       run: |
-        go get -v -t -d ./...
-        if [ -f Gopkg.toml ]; then
-            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-            dep ensure
-        fi
-
-    - name: Build
-      run: go build -v .
+        ./docker-ci.sh

.github/workflows/project.yml

@@ -0,0 +1,29 @@
+name: Project Style Check
+on: [pull_request]
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Set up Go 1.12
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.12
+        id: go
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+
+      - name: InstallTool
+        run: |
+          wget -O - -q https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s v1.18.0
+          ./bin/golangci-lint --version
+
+      - name: Build
+        run: go build ./pulsar
+
+      - name: CheckStyle
+        run: |
+          ./bin/golangci-lint run -c ./.golangci.yml ./...

docker-ci.sh

@@ -20,9 +20,6 @@
 
 set -e -x
 
-# Project code style check
-docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:v1.21.0 golangci-lint run -v -c ./.golangci.yml ./...
-
 SRC_DIR=$(git rev-parse --show-toplevel)
 cd ${SRC_DIR}
 

pulsar/consumer_partition.go

@@ -469,7 +469,7 @@ func (pc *partitionConsumer) dispatcher() {
 		case clearQueueCb := <-pc.clearQueueCh:
 			// drain the message queue on any new connection by sending a
 			// special nil message to the channel so we know when to stop dropping messages
-			var nextMessageInQueue *messageID = nil
+			var nextMessageInQueue *messageID
 			go func() {
 				pc.queueCh <- nil
 			}()