Add go install script

bin/install-go-system

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+set -e
+
+GO_VERSION=${GO_VERSION:-1.14}
+
+PREFIX_DIR=/usr/local
+#BIN_DIR=${PREFIX_DIR}/bin
+
+GO_PREFIX_DIR=${PREFIX_DIR}/golang
+GO_DEST_DIR=${GO_PREFIX_DIR}/${GO_VERSION}
+GO_CURRENT=${PREFIX_DIR}/go
+
+OS=
+if [[ $OSTYPE =~ linux ]]; then
+    OS=linux
+elif [[  $OSTYPE =~ darwin ]]; then
+    OS=darwin
+else
+    echo unknown os: $OSTYPE
+    exit 1
+fi
+
+ARCH=
+if [[ $(uname -m) == x86_64 ]]; then
+    ARCH=amd64
+else
+    echo arch not yet supported: $(uname -m)
+    exit 1
+fi
+
+[[ -d ${GO_DEST_DIR} ]] || sudo mkdir -p ${GO_DEST_DIR}
+
+TMP_DIR=
+if [[ ! -d ${GO_DEST_DIR}/bin ]]; then
+    TMP_DIR=$(mktemp --directory)
+    DEST_FILE=$TMP_DIR/go.tar.gz
+    URL=https://dl.google.com/go/go${GO_VERSION}.${OS}-${ARCH}.tar.gz
+    echo downloading go $GO_VERSION to temp directory ${TMP_DIR}
+    curl --silent --output ${DEST_FILE} ${URL}
+
+    sudo tar xf ${DEST_FILE} --directory ${GO_DEST_DIR} --strip-components 1
+    sudo chown --recursive root:root ${GO_DEST_DIR}
+else
+    echo go $GO_VERSION already installed
+fi
+
+cd ${PREFIX_DIR}
+[[ -s go ]] && sudo unlink go
+sudo ln --symbolic ${GO_DEST_DIR} go
+echo current version set to ${GO_VERSION}
+
+[[ -f /etc/profile.d/go-path.sh ]] \
+    || echo 'export PATH=$PATH:/usr/local/go/bin' \
+    | sudo tee /etc/profile.d/go-path.sh
+
+if [[ $TMP_DIR != "" ]]; then
+    rm -rf ${TMP_DIR}
+    echo removed up temp directory ${TMP_DIR}
+fi