Use go 1.9 in travis. Add gofmt check in CI. go fmt for sample/github_hmac/handler.go

Signed-off-by: Minh-Quan TRAN <account@itscaro.me>

.travis.yml

@@ -3,7 +3,7 @@ sudo: required
 language: go
 
 go:
-  - 1.7.x
+  - 1.9.x
 install:
   - echo "Please don't go get"
   
@@ -11,7 +11,7 @@ services:
   - docker
 
 before_script:
-- curl -sSL test.docker.com | sudo -E sh
+  - curl -sSL test.docker.com | sudo -E sh
 
 script:
   - go get -d -v

build.sh

@@ -1,7 +1,10 @@
 #!/bin/sh
 
+# gofmt
+test 0 -ne `gofmt -l . | wc -l` && echo "gofmt needed for:\n" && gofmt -l . && exit 1
+
+# build
 docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -t faas-cli . && \
  docker create --name faas-cli faas-cli && \
  docker cp faas-cli:/root/faas-cli . && \
  docker rm -f faas-cli
-

build_redist.sh

@@ -1,5 +1,9 @@
 #!/bin/sh
 
+# gofmt
+test 0 -ne `gofmt -l . | wc -l` && echo "gofmt needed for:\n" && gofmt -l . && exit 1
+
+# build
 docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -t faas-cli . -f Dockerfile.redist && \
  docker create --name faas-cli faas-cli && \
  docker cp faas-cli:/root/faas-cli . && \