On Thu, Jul 04, 2013 at 01:59:10PM +0300, Orgad Shaneh wrote:
> On Thu, Jul 4, 2013 at 1:34 PM, John Keeping <j...@keeping.me.uk> wrote:
> > On Thu, Jul 04, 2013 at 12:47:28PM +0300, Orgad Shaneh wrote:
> >> Hi,
> >>
> >> If a prepare-commit-msg hook is used, git gui executes it for "New Commit".
> >>
> >> If the "New Commit" is selected, and then immediately "Amend" (before
> >> the hook returns), when the hook returns the message is replaced with
> >> the one produced by the hook.
> >
> > I think this is a problem with the hook you are running.  The hook is
> > given arguments specifying the message file and optionally the source of
> > whatever is already in the file (see githooks(5) for details).
> >
> > It sounds like your hook is blindly overwriting the file, rather than
> > preserving its contents in the cases where you wish to do so.
> Let me try to explain.
> When git gui is executed, it calls the prepare-commit-msg script with
> .git/PREPARE_COMMIT_MSG as an argument.
> When amend is selected, the hook is *not* called at all (what would it
> prepare? The message is already committed)
> Use the following hook to reproduce:
> --- snip ---
> #!/bin/sh
> sleep 5
> echo "$@" >> /tmp/hook.log
> echo 'Hello hook' > "$1"
> --- snip ---
> Now run git gui (or press F5 if it is already running), and before 5
> seconds pass, click Amend last commit. You'll see the commit's
> message, but when the 5 seconds pass it is replaced with "Hello hook".
> That's the bug.

Yeah I got what you mean, it looks like it's an update problem of the
test-box in git-gui. You can also get that textbox to be completely
empty if you click back and foward between "new commit" and "amend". The
hook is not always runned.

I can confirm this bug. I don't think it related to pure git but to

I imagine that "new commit" exectures the prepare-commit-msg hook and
replaces the textbox content with it. Something that should be correct,
but the you've already told the textbox to have an other value (the
value of the commit to amend).

There should be a check before writing to the textbox if "new commit"
still is set.

Med vänliga hälsningar
Fredrik Gustafsson

tel: 0733-608274
e-post: iv...@iveqy.com
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