On Nov 15, 2010, at 2:52 PM, Kevin Ballard wrote:
>> As a fan of colourful prompts, I'd be very happy if you found a way
>> around this for parts of a script. But as a fan of fast prompts, I'd
>> prefer not to call __git_ps1 more than once :)
>
> I don't think there is any way around this, besides patching bash to be
> intelligent and determine which PS1 characters are printable itself without
> relying on \[ and \].
I take it back. We can use PROMPT_COMMAND for this, to set up variables
containing what you want.
Something like the following should work:
function __populate_git_ps1_vars () {
# this relies on a bashism, so make sure you're actually using bash.
# specifically it relies on <<<"word".
local status
local prompt="$(__git_ps1 "%s")"
# empty out the vars
__git_ps1_branch=""
__git_ps1_staged=""
__git_ps1_unstaged=""
__git_ps1_stash=""
__git_ps1_untracked=""
__git_ps1_upstream=""
__git_ps1_left=""
__git_ps1_right=""
if test -z "$prompt"; then
# return now
return
fi
__git_ps1_left=" ("
__git_ps1_right=")"
__git_ps1_branch="$(git rev-parse --symbolic-full-name --abbrev-ref=loose HEAD)"
status="${prompt#$__git_ps1_branch}"
while read -N 1 char; do
case "$char" in
\*) __git_ps1_unstaged="$char" ;;
+) __git_ps1_staged="$char" ;;
$) __git_ps1_stash="$char" ;;
%) __git_ps1_untracked="$char" ;;
\<|\>) __git_ps1_upstream="${__git_ps1_upstream}$char" ;;
esac
done <<<"$status"
}
PROMPT_COMMAND=__populate_git_ps1_vars
PS1='\w${__git_ps1_left}${__git_ps1_branch}\[\e[31m\]${__git_ps1_staged}\[\e[34m\]${__git_ps1_unstaged}\[\e[32m\]${__git_ps1_stash}\[\e[1;34m\]${__git_ps1_untracked}\[\e[31m\]${__git_ps1_upstream}\[\e[m\]${__git_ps1_right}> '
-Kevin Ballard--
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