Add DCO check to travis

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

.travis.yml

@@ -19,11 +19,13 @@ install:
   - wget https://github.com/google/protobuf/releases/download/v3.1.0/protoc-3.1.0-linux-x86_64.zip -O /tmp/protoc-3.1.0-linux-x86_64.zip
   - unzip -o -d /tmp/protobuf /tmp/protoc-3.1.0-linux-x86_64.zip
   - export PATH=$PATH:/tmp/protobuf/bin/
+  - go get -u github.com/vbatts/git-validation
 
 script:
   - make fmt
   - make binaries
   - make coverage
+  - TRAVIS_COMMIT_RANGE="${TRAVIS_COMMIT_RANGE/.../..}" make dco
   - sudo PATH=$PATH GOPATH=$GOPATH make root-coverage
 
 after_success:

Makefile

@@ -23,7 +23,7 @@ GO_LDFLAGS=-ldflags "-X $(PKG).Version=$(VERSION) -X $(PKG).Package=$(PKG)"
 # Flags passed to `go test`
 TESTFLAGS ?=-parallel 8 -race
 
-.PHONY: clean all AUTHORS fmt vet lint build binaries test integration setup generate protos checkprotos coverage ci check help install uninstall vendor
+.PHONY: clean all AUTHORS fmt vet lint dco build binaries test integration setup generate protos checkprotos coverage ci check help install uninstall vendor
 .DEFAULT: default
 
 all: binaries
@@ -77,6 +77,14 @@ lint: ## run go lint
 	@echo "🐳 $@"
 	@test -z "$$(golint ./... | grep -v vendor/ | grep -v ".pb.go:" | tee /dev/stderr)"
 
+dco: ## dco check
+	@which git-validation > /dev/null 2>/dev/null || (echo "ERROR: git-validation not found" && false)
+ifdef TRAVIS_COMMIT_RANGE
+	git-validation -q -run DCO,short-subject,dangling-whitespace
+else
+	git-validation -v -run DCO,short-subject,dangling-whitespace -range $(EPOCH_TEST_COMMIT)..HEAD
+endif
+
 ineffassign: ## run ineffassign
 	@echo "🐳 $@"
 	@test -z "$$(ineffassign . | grep -v vendor/ | grep -v ".pb.go:" | tee /dev/stderr)"