Hide git prompt completely if git config flag "oh-my-zsh.hide-status" is set (#184)

* Hide git prompt if git config flag "oh-my-zsh.hide-status" is set

* Add documentation about the `oh-my-zsh.hide-status` git config flag

README.md

@@ -220,6 +220,8 @@ NOTE: You do not need to specify *end* segment - it will be added automatically.
 |`BULLETTRAIN_GIT_BEHIND`|`" ⬇"`|Icon for behind state from remote
 |`BULLETTRAIN_GIT_DIVERGED`|`" ⬍"`|Icon for diverged state from remote
 
+The git prompt can be disabled for a specific repository by setting a git config flag: `get config oh-my-zsh.hide-status 1`. This is useful to avoid performance issues for particularly huge repositories.
+
 ### Mercurial/HG
 
 |Variable|Default|Meaning

bullet-train.zsh-theme

@@ -357,6 +357,10 @@ prompt_custom() {
 
 # Git
 prompt_git() {
+  if [[ "$(command git config --get oh-my-zsh.hide-status 2>/dev/null)" == "1" ]]; then
+    return
+  fi
+
   local ref dirty mode repo_path git_prompt
   repo_path=$(git rev-parse --git-dir 2>/dev/null)