add arm64/armhf for 18.04, replace git{,-lfs} (#51)

linux/ubuntu/scripts/go.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
+# shellcheck disable=SC1091,SC2174
 
-# shellcheck disable=SC1091
 . /etc/environment
 
 set -Eeuxo pipefail
@@ -9,20 +9,23 @@ printf "\n\t🐋 Installing Go(lang) 🐋\t\n"
 
 JSON=$(wget -qO- "$(jq -r '.toolcache[] | select(.name == "go") | .url' "/imagegeneration/toolset.json")" | jq --compact-output)
 
+go_arch() {
+  case "$(uname -m)" in
+    'x86_64') echo 'amd64' ;;
+    'aarch64') echo 'arm64' ;;
+  esac
+}
+
 for V in $(jq -r '.toolcache[] | select(.name == "go") | .versions[]' "/imagegeneration/toolset.json"); do
   printf "\n\t🐋 Installing GO=%s 🐋\t\n" "${V}"
   VER=$(echo "${JSON}" | jq "[.[] | select(.version|test(\"^${V}\"))][0].version" -r)
   GOPATH="$AGENT_TOOLSDIRECTORY/go/${VER}/x64"
 
-  # shellcheck disable=SC2174
   mkdir -v -m 0777 -p "$GOPATH"
-  ARCH=$(uname -m)
-  if [ "$ARCH" = x86_64 ]; then ARCH=amd64; fi
-  if [ "$ARCH" = aarch64 ]; then ARCH=arm64; fi
-  wget -qO- "https://golang.org/dl/go${VER}.linux-$ARCH.tar.gz" | tar -zxf - --strip-components=1 -C "$GOPATH"
+  wget -qO- "https://golang.org/dl/go${VER}.linux-$(go_arch).tar.gz" | tar -zxf - --strip-components=1 -C "$GOPATH"
 
-  ENVVAR="${V//\./_}"
-  echo "${ENVVAR}=${GOPATH}" >>/etc/environment
+  # ENVVAR="${V//\./_}"
+  # echo "${ENVVAR}=${GOPATH}" >>/etc/environment
 
   printf "\n\t🐋 Installed GO 🐋\t\n"
   "$GOPATH/bin/go" version