keep goimports under vendor/

Signed-off-by: Petr Horacek <phoracek@redhat.com>

.travis.yml

@@ -4,8 +4,6 @@ go: "1.11"
 services:
 - docker
 
-before_install:
-- go get golang.org/x/tools/cmd/goimports
 install: true
 script:
 - make check

Gopkg.toml

@@ -10,6 +10,7 @@ required = [
   "k8s.io/gengo/args",
   "sigs.k8s.io/controller-tools/pkg/crd/generator",
   "github.com/operator-framework/operator-sdk/cmd/operator-sdk",
+  "golang.org/x/tools/cmd/goimports",
 ]
 
 # https://github.com/golang/dep/issues/1799

Makefile

@@ -19,7 +19,7 @@ apis_sources := $(shell find ./pkg/apis/ -type f -name '*.go')
 fmt: whitespace goimports
 
 goimports: $(cmd_sources) $(pkg_sources)
-	goimports -w ./pkg ./cmd
+	go run ./vendor/golang.org/x/tools/cmd/goimports -w ./pkg ./cmd
 	touch $@
 
 whitespace: $(cmd_sources) $(pkg_sources)
@@ -37,7 +37,7 @@ vet: $(cmd_sources) $(pkg_sources)
 	touch $@
 
 goimports-check: $(cmd_sources) $(pkg_sources)
-	goimports -d ./pkg ./cmd
+	go run ./vendor/golang.org/x/tools/cmd/goimports -d ./pkg ./cmd
 	touch $@
 
 test: