Add Docker Machine Env Node to Agnoster Theme

themes/agnoster.zsh-theme

@@ -222,7 +222,25 @@ build_prompt() {
   prompt_git
   prompt_bzr
   prompt_hg
+  prompt_docker_host
+#  prompt_k8s_context
   prompt_end
 }
 
 PROMPT='%{%f%b%k%}$(build_prompt) '
+
+prompt_docker_host() {
+  if [[ ! -z "$DOCKER_MACHINE_NAME" ]]; then
+    prompt_segment red default "\xF0\x9F\x90\xB3: '$DOCKER_MACHINE_NAME'"
+  elif [[ ! -z "$DOCKER_HOST" ]]; then
+    prompt_segment red default "\xF0\x9F\x90\xB3: '$DOCKER_HOST'"
+  fi
+}
+
+# k8s context
+#prompt_k8s_context() {
+#    K8S_CONTEXT=$(cat $KUBECONFIG | grep 'current-context:' | cut -d: -f2 | tr -d ' ')
+#    if [[ -n "$K8S_CONTEXT" ]]; then
+#        prompt_segment red default "%{$fg_bold[blue]%}\xE2\x8E\x88%{$fg_no_bold[white]%}: '$K8S_CONTEXT'"
+#    fi
+#}