add BULLETTRAIN_GIT_COLORIZE_DIRTY to show yellow BG when git repo is…

… dirty

this feature is borrowed from agnoster
https://gist.github.com/agnoster/3712874#file-agnoster-zsh-theme-L82

README.md

@@ -190,6 +190,7 @@ or don't want to see. All options must be overridden in your **.zshrc** file.
 |Variable|Default|Meaning
 |--------|-------|-------|
 |`BULLETTRAIN_GIT_SHOW`|`true`|Show/hide that segment
+|`BULLETTRAIN_GIT_COLORIZE_DIRTY`|`false`|Set BULLETTRAIN_GIT_BG to yellow in dirty state
 |`BULLETTRAIN_GIT_BG`|`white`|Background color
 |`BULLETTRAIN_GIT_FG`|`black`|Foreground color
 |`BULLETTRAIN_GIT_EXTENDED`|`true`|

bullet-train.zsh-theme

@@ -134,6 +134,9 @@ fi
 if [ ! -n "${BULLETTRAIN_GIT_SHOW+1}" ]; then
   BULLETTRAIN_GIT_SHOW=true
 fi
+if [ ! -n "${BULLETTRAIN_GIT_COLORIZE_DIRTY+1}" ]; then
+  BULLETTRAIN_GIT_COLORIZE_DIRTY=false
+fi
 if [ ! -n "${BULLETTRAIN_GIT_BG+1}" ]; then
   BULLETTRAIN_GIT_BG=white
 fi
@@ -290,6 +293,9 @@ prompt_git() {
   repo_path=$(git rev-parse --git-dir 2>/dev/null)
 
   if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
+    if [[ $BULLETTRAIN_GIT_COLORIZE_DIRTY == true && $(git status --porcelain --ignore-submodules) ]]; then
+      BULLETTRAIN_GIT_BG=yellow
+    fi
     prompt_segment $BULLETTRAIN_GIT_BG $BULLETTRAIN_GIT_FG
 
     if [[ $BULLETTRAIN_GIT_EXTENDED == true ]]; then