make,travis: drop golang 1.7.x, add 1.9.x, 1.10.x

.travis.yml

@@ -6,9 +6,10 @@ git:
 env:
   - PROTOBUF_VERSION=3.3.0
 go:
-  # update validate-protobufs Makefile target once golang 1.8.x is no longer tested here
-  - 1.7.x
+  # update validate-protobufs Makefile target once golang 1.10.x is no longer tested here
   - 1.8.x
+  - 1.9.x
+  - 1.10.x
 before_install:
    #these two lines help users who fork mesos-go. It's a noop when running from the mesos organization
   - RepoName=`basename $PWD`; SrcDir=`dirname $PWD`; DestDir="`dirname $SrcDir`/mesos"
@@ -18,7 +19,7 @@ before_install:
   - make sync
   - api/v1/vendor/github.com/gogo/protobuf/install-protobuf.sh
   # re-generate protobuf and json code, check that there are no differences w/ respect to what's been checked in
-  # ONLY for golang1.8.x; generated protobufs are not guaranteed to be consistent across golang versions
+  # ONLY for golang1.10.x; generated protobufs are not guaranteed to be consistent across golang versions
   - make validate-protobufs
 install:
   - make test install

Makefile

@@ -17,7 +17,7 @@ BINARIES ?= $(shell go list -f "{{.Name}} {{.ImportPath}}" ${CMD_PKG}/...|grep -
 TEST_FLAGS ?= -race
 COVERAGE_TARGETS = ${TEST_DIRS:%/=%.cover}
 
-GO_VERSION := $(shell go version|cut -f3 -d' '|dd bs=1 count=5 2>/dev/null)
+GO_VERSION := $(shell go version|cut -f3 -d' '|dd bs=1 count=6 2>/dev/null)
 
 .PHONY: all
 all: test
@@ -121,7 +121,7 @@ docker:
 	mkdir -p _output
 	test -n "$(UID)" || (echo 'ERROR: $$UID is undefined'; exit 1)
 	test -n "$(GID)" || (echo 'ERROR: $$GID is undefined'; exit 1)
-	docker run --rm -v "$$PWD":/src -w /go/src/$(GOPKG_DIRNAME) golang:1.8.1-alpine sh -c $(BUILD_STEP)' && '$(COPY_STEP)
+	docker run --rm -v "$$PWD":/src -w /go/src/$(GOPKG_DIRNAME) golang:1.10.1-alpine sh -c $(BUILD_STEP)' && '$(COPY_STEP)
 	make -C api/${MESOS_API_VERSION}/docker
 
 .PHONY: coveralls
@@ -134,7 +134,7 @@ coveralls:
 
 # re-generate protobuf and json code, check that there are no differences w/ respect to what's been checked in
 .PHONY: validate-protobufs
-ifeq ($(GO_VERSION),go1.8)
+ifeq ($(GO_VERSION),go1.10)
 validate-protobufs: SHELL := /bin/bash
 validate-protobufs:
 	(cd api/v1; govendor install +vendor,program) && $(MAKE) -s protobufs ffjson && [[ `{ git status --porcelain || echo "failed"; } | tee /tmp/status | wc -l` = "0" ]] || { cat /tmp/status; git diff; false; }