On Mon, Jun 03, 2013 at 03:17:27PM +0530, Ramkumar Ramachandra wrote:

> Thomas Rast wrote:
> > Do you have other ways of distinguishing the branch and the state?
> > Colors?  I'm a bit too lazy to check.  Perhaps it could be made to only
> > use caps if not in colored mode?
> Currently, no.   See git-prompt.sh:401, 403, 409; we don't have a
> separate color for $r.  I didn't introduce a color in this series
> because it would conflict with rr/zsh-color-prompt which is in pu: we
> can introduce it after that graduates.  I was thinking yellow, since
> that's not taken?
> You really should use colors.  I don't think it's worth the extra
> ugliness to scream in the no-color case.
> As such, the prompt is a fine bikeshedding target.  I even introduced
> GIT_PS1_SEPARATOR, because some people were unhappy with me stripping
> one whitespace (yes, one).  If we go down the configurability road,
> we'll either end up with a ton of environment variables, or be made to
> write a generalized custom formatter which splices together tons of
> arguments using color (super painful).  While I do agree that it is a
> matter of taste, we have to make a few compromises for the sake of
> sanity.

It seems silly to argue about output formats when we are writing a
prompt in a convenient Turing-complete scripting language already.
What about something like:

diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index eaf5c36..1da3833 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -404,6 +404,8 @@ __git_ps1 ()
                        gitstring=$(printf -- "$printf_format" "$gitstring")
+               elif test "$(type -t __git_ps1_printer)" = "function"; then
+                       __git_ps1_printer
                        # NO color option unless in PROMPT_COMMAND mode
                        printf -- "$printf_format" "$c${b##refs/heads/}${f:+ 

and then you can define your own custom function if you like, which will
inherit all of the variables from __git_ps1. E.g.:

  __git_ps1_printer() {
          echo "${r,,}"

yields a lower-case "rebase-i". Of course there are many other variables
you want to put in your prompt, too. The only problem I see is that the
current set of variables is not suitable as a user-visible interface.
The names are not good (the branch should be "$branch" rather than "$b",
the operation-in-progress should be "$operation" or similar rather than
"$r", etc), and the formats are not as convenient ("$r" contains the
full "|REBASE-i 6/10", whereas it should be broken down so the printing
function can easily use a case statement).

And of course the variables would need documentation.

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