scripts,travis: install 'marker' for CI tests

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

.travis.yml

@@ -46,6 +46,7 @@ before_install:
  - go get -v -u honnef.co/go/tools/cmd/gosimple
  - go get -v -u honnef.co/go/tools/cmd/unused
  - go get -v -u honnef.co/go/tools/cmd/staticcheck
+ - ./scripts/install-marker.sh amd64
 
 # disable godep restore override
 install:

scripts/install-marker.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -e
+
+ARCH=$1
+
+if [ -z "$1" ]; then
+    echo "Usage: ${0} [amd64 or darwin], defaulting to 'amd64'" >> /dev/stderr
+    ARCH=amd64
+fi
+
+MARKER_URL=https://storage.googleapis.com/etcd/test-binaries/marker-v0.4.0-x86_64-unknown-linux-gnu
+if [ ${ARCH} == "darwin" ]; then
+    MARKER_URL=https://storage.googleapis.com/etcd/test-binaries/marker-v0.4.0-x86_64-apple-darwin
+fi
+
+echo "Installing marker"
+curl -L ${MARKER_URL} -o ${GOPATH}/bin/marker
+chmod 755 ${GOPATH}/bin/marker
+
+${GOPATH}/bin/marker --version