Add dep files to ensure reproducible builds

Also removes tests that didn't do anything and replace
with a generate check.

.gitignore

@@ -0,0 +1 @@
+vendor

.travis.yml

@@ -1,16 +1,18 @@
 before_install:
   - ./install-protobuf.sh
   - PATH=/home/travis/bin:$PATH protoc --version
-  - go get github.com/gogo/protobuf/protoc-gen-gogo/descriptor
-  - go get github.com/gogo/protobuf/types
-  - go get github.com/gogo/protobuf/protoc-gen-gogotypes
-  - go get github.com/gogo/protobuf/gogoreplace
+  - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
+  - dep ensure --vendor-only
   - echo $TRAVIS_GO_VERSION
 
 script:
-  - PATH=/home/travis/bin:$PATH make test
+  - PATH=/home/travis/bin:$PATH make regenerate
+  - git diff --exit-code
 
 language: go
 
 go:
-  - 1.9.x
+  - "1.9.x"
+  - "1.10.x"
+  - tip
+

Gopkg.toml

@@ -0,0 +1,12 @@
+required = [
+  "github.com/gogo/protobuf/gogoreplace",
+]
+
+[[constraint]]
+  name = "github.com/gogo/protobuf"
+  version = "1.1.1"
+
+[prune]
+  go-tests = true
+  unused-packages = true
+  non-go = true

Makefile

@@ -1,10 +1,7 @@
 URL="https://raw.githubusercontent.com/googleapis/googleapis/master/"
 
-test:
-	go test ./...
-
 regenerate:
-	go install github.com/gogo/googleapis/protoc-gen-gogogoogleapis
+	go install ./protoc-gen-gogogoogleapis
 
 	protoc \
 	--gogogoogleapis_out=\
@@ -25,7 +22,7 @@ regenerate:
 	google/api/annotations.proto
 
 update:
-	go install github.com/gogo/protobuf/gogoreplace
+	go install ./vendor/github.com/gogo/protobuf/gogoreplace
 
 	(cd ./google/rpc && rm status.proto; wget ${URL}/google/rpc/status.proto)
 	gogoreplace \
@@ -55,4 +52,4 @@ update:
 	gogoreplace \
 		'option go_package = "google.golang.org/genproto/googleapis/api/annotations;annotations";' \
 		'option go_package = "api";' \
-		./google/api/annotations.proto
+		./google/api/annotations.proto

install-protobuf.sh

@@ -4,7 +4,7 @@ set -ex
 
 cd /home/travis
 
-basename=protoc-3.5.1-linux-x86_64
-wget https://github.com/google/protobuf/releases/download/v3.5.1/$basename.zip
+basename=protoc-3.6.1-linux-x86_64
+wget https://github.com/google/protobuf/releases/download/v3.6.1/$basename.zip
 unzip $basename.zip