github bash profile enhancements

.bash_profile

### GIT ENHANCEMENT START ###

# Git enhancement settings
unset GIT_PS1_SHOWSTASHSTATE

# Git enhancements
source ~/.git-completion.sh
source ~/.git-prompt.sh
# colors!
cyan=$(tput setaf 33)
gray=$(tput setaf 242)
blue=$(tput setaf 27)
green=$(tput setaf 28)
yellow=$(tput setaf 221)
orange=$(tput setaf 202)
gold=$(tput setaf 100)
red=$(tput setaf 124)
purple="$(tput setaf 99)"

reset=$(tput sgr0)




# Returns the name of the git repo we're currently in, if any.
# Colored based on whether the repo is currently dirty or not.
function git_repo_colored {

	# indicators for when there is something stashed/staged
	git_stash=""
	git_stage=""
	git_status="$(git status 2>&1)"

	if git rev-parse --verify refs/stash >/dev/null 2>&1; then
		git_stash="[stashed]"
	fi

	if git rev-parse --quiet --verify HEAD >/dev/null 2>&1; then
		git diff-index --cached --quiet HEAD -- || git_stage="[staged]"
	fi

	# If we're in a git repo
	if [[ "$git_status" != *"Not a git repository"* ]]; then
		if [[ "$git_status" = *"nothing to commit"* ]]; then
			# Clean repository - nothing to commit
			git_repo_status_color=$green
		elif [[ "$git_status" = *"Changes not staged for commit"* ]]; then
			# unstaged local changes
			git_repo_status_color=$yellow
		elif [[ "$git_status" = *"nmerged"* ]]; then
			# Mid conflicted merge
			git_repo_status_color=$red
		else
	    	# ??? profit!
			git_repo_status_color=$green
		fi

		curr_git_repo="$(__git_ps1 " (%s)")"
	else
	  #  Prompt when not in GIT repo
	  curr_git_repo=''
	fi
}

# Nicer cwd printing
function smart_pwd {
    local pwdmaxlen=25
    local trunc_symbol=".."
    local dir=${PWD##*/}
    local tmp=""
    pwdmaxlen=$(( ( pwdmaxlen < ${#dir} ) ? ${#dir} : pwdmaxlen ))
    new_pwd=${PWD/#$HOME/\~}
    local pwdoffset=$(( ${#new_pwd} - pwdmaxlen ))
    if [ ${pwdoffset} -gt "0" ]
    then
        tmp=${new_pwd:$pwdoffset:$pwdmaxlen}
        tmp=${trunc_symbol}/${tmp#*/}
        if [ "${#tmp}" -lt "${#new_pwd}" ]; then
            new_pwd=$tmp
        fi
    fi
}


PROMPT_COMMAND="git_repo_colored; smart_pwd"
PS1='\[$gray\]\u\[$git_repo_status_color\]$curr_git_repo\[$purple\]$git_stash\[$cyan\]$git_stage\[$blue\] $new_pwd\[$orange\] - \[$reset\]'
### GIT ENHANCEMENT END ###