Extended GIT Information in bash PS1

Extended GIT Information in bash PS1

This will generate shell similar to this :

Multiline version:

┌──┤ greg: ~/dev/discovery/discovery-agent │ master  ≡  !1 +2 -2  ≡ 2 weeks ago
└── λ 

Format `branch ≡ changes additions deletions ≡ last commit`
Example `master ≡ !1 +2 -2 ≡ 2 weeks ago`

Since we are interested in interactive shells only we will edit `/etc/profile` and add the following

# Get branch name 
parse_git_branch() {
    # git branch | grep -Po '(?<=\*\s)(.*)'	
    local branch=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ \1/')
    # When there is no initial commit, git branch will not return any branches, use a fallback method
    if [ -z "$branch" ]; then 
         branch=$(git status | grep -iPo '(?<=On branch\s)(.*)')
    fi
    echo $branch
}

parse_git_status() { 
    # changes to existing files
    # 0 = Changed Files, 1 = Additions, 2 = Deletions
    local gitstat=$(git diff --shortstat 2> /dev/null | grep -Po '\d')
    if [ -z "$gitstat" ]; then
	gitstat="0 0 0"
    fi
   
    # replate \n with blanks
    gitstat=$(echo "$gitstat" | tr '\n' ' ')
    # untracted(??) or added(A) files
    local gitfiles=$(git status --untracked-files=all -s 2> /dev/null | grep -E '??|A' | wc -l)
    echo "$gitstat $gitfiles"
}

parse_git_hascommit() {
    val=$(git log 2> /dev/null | grep -iPo 'does not have')
    echo "result :: $val"
    if [ -z "$val" ]; then
      echo 0
      return 0
    fi

    echo 1
}

git_status_ps1() {
	green_light="\e[38;5;82m"                                             
	red="\e[91m"       
	blue="\e[34m"
	reset="\e[0m"      

	inrepo=$(git rev-parse --is-inside-work-tree 2>/dev/null)         
	if [ -z "$inrepo" ]; then 
	   exit
        fi

	#hascommit=$(parse_git_hascommit)
	#echo "has :: $hascommit"i
	# can't get time unless we have a commit

        # capture error 'fatal: your current branch 'master' does not have any commits yet' and don't display time
	gittime=$(git log -1 --format=%cr 2> /dev/null)                                  	
        gitstat=$(parse_git_status)                                       
	IFS=' ' read -r -a array <<< $gitstat                               

	if [ -z "${array[0]}" ]; then                                         
		array[0]=0     
		array[1]=0     
		array[2]=0     
	fi  

	branch_color=$green_light
	if [ "${array[0]}" -gt "0" ]; then
	   branch_color=$red
	fi

	if [ -z "$gittime" ]; then
	   gittime="never"
	fi 
        GIT_PS1="$branch_color$(parse_git_branch) $reset ≡ $green_light ~${array[3]}  !${array[0]} +${array[1]} $red-${array[2]} $reset  ≡  $gittime"
	echo -e $GIT_PS1
}


PS1='┌──┤ \[\033[01;32m\]\u:\[\033[00m\] '
PS1=$PS1'\[\033[01;34m\]\w\e[0m │ $(git_status_ps1)\n└──  λ '

GIST