#!/usr/bin/env bash
#
# Run all etcd tests
# ./test
# ./test -v
#
# Run tests for one package
#
# PKG=./wal ./test
# PKG=snap ./test
#
# Run code coverage
# COVERDIR must either be a absolute path or a relative path to the etcd root
# COVERDIR=coverage PASSES="build_cov cov" ./test
set -e

source ./build

# build tests with vendored dependencies
etcd_setup_gopath

if [ -z "$PASSES" ]; then
	PASSES="fmt bom dep compile build unit"
fi

# Invoke ./cover for HTML output
COVER=${COVER:-"-cover"}

# Hack: gofmt ./ will recursively check the .git directory. So use *.go for gofmt.
IGNORE_PKGS="(cmd/|etcdserverpb|rafttest|gopath.proto|v3lockpb|v3electionpb)"
INTEGRATION_PKGS="(integration|e2e|contrib|functional-tester)"

# all github.com/coreos/etcd/whatever pkgs that are not auto-generated / tools
PKGS=`find . -name \*.go | while read a; do dirname $a; done | sort | uniq | egrep -v "$IGNORE_PKGS" | egrep -v "(tools/|contrib/|e2e|pb)" | sed "s|\.|${REPO_PATH}|g"`
# pkg1,pkg2,pkg3
PKGS_COMMA=`echo ${PKGS} | sed 's/ /,/g'`

TEST_PKGS=`find . -name \*_test.go | while read a; do dirname $a; done | sort | uniq | egrep -v "$IGNORE_PKGS" | sed "s|\./||g"`
FORMATTABLE=`find . -name \*.go | while read a; do echo $(dirname $a)/"*.go"; done | sort | uniq | egrep -v "$IGNORE_PKGS" | sed "s|\./||g"`
TESTABLE_AND_FORMATTABLE=`echo "$TEST_PKGS" | egrep -v "$INTEGRATION_PKGS"`

# TODO: 'client' pkg fails with gosimple from generated files
# TODO: 'rafttest' is failing with unused
STATIC_ANALYSIS_PATHS=`find . -name \*.go | while read a; do dirname $a; done | sort | uniq | egrep -v "$IGNORE_PKGS" | grep -v 'client'`

if [ -z "$GOARCH" ]; then
	GOARCH=$(go env GOARCH);
fi

# user has not provided PKG override
if [ -z "$PKG" ]; then
	TEST=$TESTABLE_AND_FORMATTABLE
	FMT=$FORMATTABLE

# user has provided PKG override
else
	# strip out leading dotslashes and trailing slashes from PKG=./foo/
	TEST=${PKG/#./}
	TEST=${TEST/#\//}
	TEST=${TEST/%\//}

	# only run gofmt on packages provided by user
	FMT="$TEST"
fi

# split TEST into an array and prepend REPO_PATH to each local package
split=(${TEST// / })
TEST=${split[@]/#/${REPO_PATH}/}

# determine whether target supports race detection
if [ "$GOARCH" == "amd64" ]; then
	RACE="--race"
fi

function unit_pass {
	echo "Running unit tests..."
	# only -run=Test so examples can run in integration tests
	go test -timeout 3m ${COVER} ${RACE} -cpu 1,2,4 -run=Test $@ ${TEST}
}

function integration_pass {
	echo "Running integration tests..."
	go test -timeout 15m -v -cpu 1,2,4 $@ ${REPO_PATH}/integration
	go test -timeout 1m -v ${RACE} -cpu 1,2,4 $@ ${REPO_PATH}/client/integration
	go test -timeout 10m -v ${RACE} -cpu 1,2,4 $@ ${REPO_PATH}/clientv3/integration
	go test -timeout 1m -v -cpu 1,2,4 $@ ${REPO_PATH}/contrib/raftexample
	go test -timeout 1m -v ${RACE} -cpu 1,2,4 -run=Example $@ ${TEST}
}

function cov_pass {
	echo "Running code coverage..."
	# install gocovmerge before running code coverage from github.com/wadey/gocovmerge
	# gocovmerge merges coverage files
	if ! which gocovmerge >/dev/null; then
		echo "gocovmerge not installed"
		exit 255
	fi

	if [ -z "$COVERDIR" ]; then
		echo "COVERDIR undeclared"
		exit 255
	fi

	if [ ! -f "bin/etcd_test" ]; then
		echo "etcd_test binary not found"
		exit 255
	fi

	mkdir -p "$COVERDIR"

	# run code coverage for unit and integration tests
	GOCOVFLAGS="-covermode=set -coverpkg $PKGS_COMMA -v -timeout 15m"
	failed=""
	for t in `echo "${TEST_PKGS}" | egrep -v "(e2e|functional-tester)"`; do
		tf=`echo $t | tr / _`
		# cache package compilation data for faster repeated builds
		go test $GOCOVFLAGS -i ${REPO_PATH}/$t || true
		# uses -run=Test to skip examples because clientv3/ example tests will leak goroutines
		go test $GOCOVFLAGS -run=Test -coverprofile "$COVERDIR/${tf}.coverprofile"  ${REPO_PATH}/$t || failed="$failed $t"
	done

	# proxy tests
	go test -tags cluster_proxy $GOCOVFLAGS -coverprofile "$COVERDIR/proxy_integration.coverprofile" ${REPO_PATH}/integration || failed="$failed proxy-integration"
	go test -tags cluster_proxy $GOCOVFLAGS -coverprofile "$COVERDIR/proxy_clientv3.coverprofile" ${REPO_PATH}/clientv3/integration || failed="$failed proxy-clientv3/integration"

	# run code coverage for e2e tests
	# use 30m timeout because e2e coverage takes longer
	# due to many tests cause etcd process to wait
	# on leadership transfer timeout during gracefully shutdown
	go test -tags cov -timeout 30m -v ${REPO_PATH}"/e2e" || failed="$failed e2e"

	gocovmerge "$COVERDIR"/*.coverprofile >"$COVERDIR"/cover.out
	# strip out generated files (using GNU-style sed)
	sed --in-place '/generated.go/d' "$COVERDIR"/cover.out || true

	# held failures to generate the full coverage file, now fail
	if [ -n "$failed" ]; then
		for f in $failed; do
			echo FAIL $f
		done
		exit 255
	fi
}

function e2e_pass {
	echo "Running e2e tests..."
	go test -timeout 15m -v -cpu 1,2,4 $@ ${REPO_PATH}/e2e
}

function integration_e2e_pass {
	echo "Running integration and e2e tests..."

	go test -timeout 15m -v -cpu 1,2,4 $@ ${REPO_PATH}/e2e &
	e2epid="$!"
	go test -timeout 15m -v -cpu 1,2,4 $@ ${REPO_PATH}/integration &
	intpid="$!"
	wait $e2epid
	wait $intpid
	go test -timeout 1m -v ${RACE} -cpu 1,2,4 $@ ${REPO_PATH}/client/integration
	go test -timeout 10m -v ${RACE} -cpu 1,2,4 $@ ${REPO_PATH}/clientv3/integration
	go test -timeout 1m -v -cpu 1,2,4 $@ ${REPO_PATH}/contrib/raftexample
	go test -timeout 1m -v ${RACE} -cpu 1,2,4 -run=Example $@ ${TEST}
}

function grpcproxy_pass {
	go test -timeout 15m -v ${RACE} -tags cluster_proxy -cpu 1,2,4 $@ ${REPO_PATH}/integration
	go test -timeout 15m -v ${RACE} -tags cluster_proxy -cpu 1,2,4 $@ ${REPO_PATH}/clientv3/integration
}

function release_pass {
	rm -f ./bin/etcd-last-release
	# to grab latest patch release; bump this up for every minor release
	UPGRADE_VER=$(git tag -l --sort=-version:refname "v3.1.*" | head -1)
	if [ -n "$MANUAL_VER" ]; then
		# in case, we need to test against different version
		UPGRADE_VER=$MANUAL_VER
	fi

	local file="etcd-$UPGRADE_VER-linux-$GOARCH.tar.gz"
	echo "Downloading $file"

	set +e
	curl --fail -L https://github.com/coreos/etcd/releases/download/$UPGRADE_VER/$file -o /tmp/$file
	local result=$?
	set -e
	case $result in
		0)	;;
		22)	return 0
			;;
		*)	exit $result
			;;
	esac

	tar xzvf /tmp/$file -C /tmp/ --strip-components=1
	mkdir -p ./bin
	mv /tmp/etcd ./bin/etcd-last-release
}

function fmt_pass {
	toggle_failpoints disable

	echo "Checking gofmt..."
	fmtRes=$(gofmt -l -s -d $FMT)
	if [ -n "${fmtRes}" ]; then
		echo -e "gofmt checking failed:\n${fmtRes}"
		exit 255
	fi

	echo "Checking govet..."
	vetRes=$(go vet $TEST)
	if [ -n "${vetRes}" ]; then
		echo -e "govet checking failed:\n${vetRes}"
		exit 255
	fi

	echo "Checking 'go tool vet -shadow'..."
	for path in $FMT; do
		if [ "${path##*.}" != "go" ]; then
			path="${path}/*.go"
		fi
		vetRes=$(go tool vet -shadow ${path})
		if [ -n "${vetRes}" ]; then
			echo -e "govet -shadow checking ${path} failed:\n${vetRes}"
			exit 255
		fi
	done

	echo "Checking documentation style..."
	# eschew you
	yous=`find . -name \*.md | xargs egrep --color "[Yy]ou[r]?[ '.,;]" | grep -v /v2/ || true`
	if [ ! -z "$yous" ]; then
		echo -e "found 'you' in documentation:\n${yous}"
		exit 255
	fi

	if which goword >/dev/null; then
		echo "Checking goword..."
		# get all go files to process
		gofiles=`find $FMT -iname '*.go' 2>/dev/null`
		# ignore tests and protobuf files
		gofiles=`echo ${gofiles} | sort | uniq | sed "s/ /\n/g" | egrep -v "(\\_test.go|\\.pb\\.go)"`
		# only check for broken exported godocs
		gowordRes=`goword -use-spell=false ${gofiles} | grep godoc-export | sort`
		if [ ! -z "$gowordRes" ]; then
			echo -e "goword checking failed:\n${gowordRes}"
			exit 255
		fi
	else
		echo "Skipping goword..."
	fi

	if which gosimple >/dev/null; then
		echo "Checking gosimple..."
		gosimpleResult=`gosimple ${STATIC_ANALYSIS_PATHS} 2>&1 || true`
		if [ -n "${gosimpleResult}" ]; then
			# TODO: resolve these after go1.8 migration
			SIMPLE_CHECK_MASK="S(1024)"
			if echo "${gosimpleResult}" | egrep -v "$SIMPLE_CHECK_MASK"; then
				echo -e "gosimple checking ${path} failed:\n${gosimpleResult}"
				exit 255
			else
				echo -e "gosimple warning:\n${gosimpleResult}"
			fi
		fi
	else
		echo "Skipping gosimple..."
	fi

	if which unused >/dev/null; then
		echo "Checking unused..."
		unusedResult=`unused ${STATIC_ANALYSIS_PATHS} 2>&1 || true`
		if [ -n "${unusedResult}" ]; then
			echo -e "unused checking failed:\n${unusedResult}"
			exit 255
		fi
	else
		echo "Skipping unused..."
	fi

	if which staticcheck >/dev/null; then
		echo "Checking staticcheck..."
		staticcheckResult=`staticcheck ${STATIC_ANALYSIS_PATHS} 2>&1 || true`
		if [ -n "${staticcheckResult}" ]; then
			# TODO: resolve these after go1.8 migration
			# See https://github.com/dominikh/go-tools/tree/master/cmd/staticcheck
			STATIC_CHECK_MASK="SA(1019|2002)"
			if echo "${staticcheckResult}" | egrep -v "$STATIC_CHECK_MASK"; then
				echo -e "staticcheck checking ${path} failed:\n${staticcheckResult}"
				exit 255
			else
				suppressed=`echo "${staticcheckResult}" | sed 's/ /\n/g' | grep "(SA" | sort | uniq -c`
				echo -e "staticcheck suppressed warnings:\n${suppressed}"
			fi
		fi
	else
		echo "Skipping staticcheck..."
	fi

	echo "Checking for license header..."
	licRes=$(for file in $(find . -type f -iname '*.go' ! -path './cmd/*' ! -path './gopath.proto/*'); do
			head -n3 "${file}" | grep -Eq "(Copyright|generated|GENERATED)" || echo -e "  ${file}"
		done;)
	if [ -n "${licRes}" ]; then
		echo -e "license header checking failed:\n${licRes}"
		exit 255
	fi

	echo "Checking commit titles..."
	git log --oneline `git merge-base HEAD master`...HEAD | while read l; do
		commitMsg=`echo "$l" | cut -f2- -d' '`
		if [[ "$commitMsg" == Merge* ]]; then
			# ignore "Merge pull" commits
			continue
		fi
		if [[ "$commitMsg" == Revert* ]]; then
			# ignore revert commits
			continue
		fi

		pkgPrefix=`echo "$commitMsg" | cut -f1 -d':'`
		spaceCommas=`echo "$commitMsg" | sed 's/ /\n/g' | grep -c ',$' || echo 0`
		commaSpaces=`echo "$commitMsg" | sed 's/,/\n/g' | grep -c '^ ' || echo 0`
		if [[ `echo $commitMsg | grep -c ":..*"` == 0 || "$commitMsg" == "$pkgPrefix" || "$spaceCommas" != "$commaSpaces" ]]; then
    			echo "$l"...
			echo "Expected commit title format '<package>{\", \"<package>}: <description>'"
			echo "Got: $l"
			exit 255
		fi
	done
}

function bom_pass {
	if ! which license-bill-of-materials >/dev/null; then
		return
	fi
	echo "Checking bill of materials..."
	license-bill-of-materials \
		--override-file bill-of-materials.override.json \
		github.com/coreos/etcd github.com/coreos/etcd/etcdctl >bom-now.json || true
	if ! diff bill-of-materials.json bom-now.json; then
		echo vendored licenses do not match given bill of materials
		exit 255
	fi
	rm bom-now.json
}

function dep_pass {
	echo "Checking package dependencies..."
	# don't pull in etcdserver package
	pushd clientv3 >/dev/null
	badpkg="(etcdserver$|mvcc$|backend$|grpc-gateway)"
	deps=`go list -f '{{ .Deps }}'  | sed 's/ /\n/g' | egrep "${badpkg}" || echo ""`
	popd >/dev/null
	if [ ! -z "$deps" ]; then
		echo -e "clientv3 has masked dependencies:\n${deps}"
		exit 255
	fi
}

function build_cov_pass {
	out="bin"
	if [ -n "${BINDIR}" ]; then out="${BINDIR}"; fi
	go test -c -covermode=set -coverpkg=$PKGS_COMMA -o ${out}/etcd_test
	go test -tags cov -c -covermode=set -coverpkg=$PKGS_COMMA -o ${out}/etcdctl_test ${REPO_PATH}/etcdctl
}

function compile_pass {
	echo "Checking build..."
	go build -v ./tools/...
}

# fail fast on static tests
function build_pass {
	GO_BUILD_FLAGS="-a -v" etcd_build
}

for pass in $PASSES; do
	${pass}_pass $@
done

echo "Success"