refactor: simplify dotfiles configuration

bash_tools/theme_bash.sh

@@ -1,23 +1,9 @@
+__dotfiles_git_prompt() {
+  local branch marks=''
+  branch=$(git symbolic-ref --quiet --short HEAD 2>/dev/null) || return
+  git diff --no-ext-diff --quiet --ignore-submodules -- 2>/dev/null || marks+=' *'
+  git diff --cached --no-ext-diff --quiet --ignore-submodules -- 2>/dev/null || marks+=' +'
+  printf '\[\e[38;5;166m\](%s\[\e[38;5;204m\]%s\[\e[38;5;166m\])\[\e[0m\]' "$branch" "$marks"
+}
 
-# display git status
-export GIT_PS1_SHOWDIRTYSTATE=1
-if [[ $(type -t __git_ps1) != function ]]; then
-    __git_ps1(){
-
-        local branch=`git branch 2>/dev/null | grep '*' | sed 's/* \(.*\)/\1/'`
-        
-        if [ -n "$branch" ]; then
-            status=`git status 2>/dev/null`
-            local stage_info="not staged for commit"
-            local commit_info="Changes to be committed"
-
-            local stage_sign=''
-            local commit_sign=''
-            [[ "$status" == *"$stage_info"* ]] && stage_sign=" *"
-            [[ "$status" == *"$commit_info"* ]] && commit_sign=" +"
-            echo "(${branch}${stage_sign}${commit_sign})"
-        fi
-    }
-fi
-export PS1=' \[\e[0;32m\]\w\[\e[01;31m\]$(__git_ps1 "(%s)")\[\e[00m\] '
-# »
+PS1=' \[\e[38;5;106m\]\w\[\e[0m\]$(__dotfiles_git_prompt)\$ '