Added argocd-cli setup

tools/argocd-cli/BUILD

@@ -0,0 +1,4 @@
+sh_binary(
+    name = "install",
+    srcs = ["install.sh"],
+)

tools/argocd-cli/install.sh

@@ -0,0 +1,43 @@
+RELEASE="v2.5.9"
+URL="https://github.com/argoproj/argo-cd/releases/download/${RELEASE}/argocd-linux-amd64"
+DESIRED_SHA="d1168eac812d939ba29c7723f56163b824f40548"
+
+if [[ "$(shasum $(realpath argocd-linux-amd64) | awk '{print $1}')" == "$DESIRED_SHA" ]] ; then
+  echo "argocd CLI already up to date"
+  exit 0
+else
+  echo "Downloading argocd cli tool"
+  curl -sSL -o argocd-linux-amd64.new ${URL}
+fi
+
+ARGO=$(realpath argocd-linux-amd64.new)
+CLI=${HOME}/monorepo/tools/bin/argocd
+
+SHASUM=$(shasum ${ARGO} | awk '{print $1}')
+
+if [[ "$SHASUM" == "$DESIRED_SHA" ]]; then
+  echo "binary 'argocd-linux-amd64.new' matches desired sha"
+  echo "  wanted: $DESIRED_SHA"
+  echo "    have: $SHASUM"
+  mv $ARGO ${ARGO%.*}
+  ARGO=$(realpath argocd-linux-amd64)
+else
+  echo "binary 'argocd-linux-amd64.new' does not match desired sha"
+  echo "  wanted: $DESIRED_SHA"
+  echo "    have: $SHASUM"
+  exit 1
+fi
+
+if test -L "$CLI"; then
+  echo "Symlink exists at ${CLI}"
+else
+  echo "Creating symlink at ${CLI}"
+  ln -s ${ARGO} ${CLI}
+fi
+
+if test -x ${ARGO} ; then
+  echo "${ARGO} is already executable"
+else
+  echo "Marking ${ARGO} executable"
+  chmod +x ${ARGO}
+fi