Re: [PATCH 2/2] show color hints based on state of the git tree

> By setting GIT_PS1_SHOW_COLORHINTS when using __git_ps1
> as PROMPT_COMMAND, you will get color hints in addition to
> a different character (*+% etc.)
> 
> Signed-off-by: Simon Oosthoek <soosthoek@nieuwland.nl>
> ---
>  contrib/completion/git-prompt.sh |   42 +++++++++++++++++++++++++++++++++++---
>  1 file changed, 39 insertions(+), 3 deletions(-)
> 
> diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
> index c50c94a..51285d7 100644
> --- a/contrib/completion/git-prompt.sh
> +++ b/contrib/completion/git-prompt.sh
> @@ -53,6 +53,12 @@
>  # find one, or @{upstream} otherwise.  Once you have set
>  # GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
>  # setting the bash.showUpstream config variable.
> +#
> +# If you would like a colored hint about the current dirty state, set
> +# GIT_PS1_SHOWCOLORHINTS to a nonempty value. When tracked files are
> +# modified, the branch name turns red, when all modifications are staged
> +# the branch name turns yellow and when all changes are checked in, the
> +# color changes to green. The colors are currently hardcoded in the function.
>  
>  # __gitdir accepts 0 or 1 arguments (i.e., location)
>  # returns location of .git repo
> @@ -201,11 +207,12 @@ __git_ps1_show_upstream ()
>  # __git_ps1 accepts 0 or 1 arguments (i.e., format string)
>  # when called from PS1 using command substitution
>  # in this mode it returns text to add to bash PS1 prompt (includes branch name) or
> -# __git_ps1 accepts 0 or 2 arguments when called from PROMPT_COMMAND
> +# __git_ps1 accepts 0 or 2 arguments when called from PROMPT_COMMAND (pc)
>  # in that case it _sets_ PS1. The arguments are parts of a PS1 string.
>  # when both arguments are given, the first is prepended and the second appended
>  # to the state string when assigned to PS1, otherwise default start/end strings
>  # are used.
> +# In pcmode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
>  __git_ps1 ()
>  {
>  	local pcmode=yes
> @@ -320,8 +327,37 @@ __git_ps1 ()
>  
>  		local f="$w$i$s$u"
>  		if [ $pcmode = yes ]; then
> -			PS1="$ps1pc_start($c${b##refs/heads/}${f:+ $f}$r$p)$ps1pc_end"
> -		elif [ $pcmode = no ]; then
> +			PS1="$ps1pc_start("
> +			if [ -n "${GIT_PS1_SHOWCOLORHINT-}" ]; then

> +				local c_red='\e[31m'
> +				local c_green='\e[32m'
> +				local c_yellow='\e[33m'
> +				local c_lblue='\e[1;34m'
> +				local c_purple='\e[35m'
> +				local c_cyan='\e[36m'
> +				local c_clear='\e[0m'
> +				local branchstring="$c${b##refs/heads/}"
> +				local branch_color="$c_green"
> +				local flags_color="$c_cyan"
> +
> +				if [ "$w" = "*" ]; then
> +					branch_color="$c_red"
> +				elif [ -n "$i" ]; then
> +					branch_color="$c_yellow"
> +				fi
> +
> +				# Setting PS1 directly with \[ and \] around colors
> +				# is necessary to prevent wrapping issues!
> +				PS1="$PS1\[$branch_color\]$branchstring\[$c_clear\]"
> +				if [ -n "$f" ]; then
> +					PS1="$PS1 \[$flags_color\]$f\[$c_clear\]"
> +				fi
> +			else
> +				PS1="$PS1$c${b##refs/heads/}${f:+ $f}$r$p"
> +			fi
> +			PS1="$PS1)$ps1pc_end"
> +		else
> +			# NO color option unless in PROMPT_COMMAND mode
>  			printf -- "${1:- (%s)}" "$c${b##refs/heads/}${f:+ $f}$r$p"
>  		fi
>  	fi
>