.git/hooks/commit-msg makes git-gui hang

[Bernhard Voelker]

Hi Jim,

I wanted to do a commit in git-gui using a message with
74 characters in a line. The commit-msg hook catched that,
and opened $EDITOR.

However, as I committed from git-gui, there was no
terminal, and git-gui hang.

berny@blackice:~/git/coreutils> ps -f
UID        PID  PPID  C STIME TTY          TIME CMD
berny     7183  7181  0 07:59 pts/1    00:00:00 bash
berny     7909  7183  0 08:07 pts/1    00:00:02 wish /usr/bin/gitk --
berny     7961  7909  0 08:08 pts/1    00:00:00 git gui
berny     7962  7961  0 08:08 pts/1    00:00:02 wish /usr/lib/git/git-gui --
berny     7970  7962  0 08:08 pts/1    00:00:00 aspell --mode=none 
--encoding=utf-8 pipe
berny    20015  7909  0 09:02 pts/1    00:00:00 git gui
berny    20016 20015  0 09:02 pts/1    00:00:01 wish /usr/lib/git/git-gui --
berny    20025 20016  0 09:03 pts/1    00:00:00 aspell --mode=none 
--encoding=utf-8 pipe
berny    20603 20016  0 09:11 pts/1    00:00:00 perl -w .git/hooks/commit-msg 
.git/GITGUI_EDITMSG
berny    20605 20603  0 09:11 pts/1    00:00:00 vi .git/GITGUI_EDITMSG
berny    21037  7183  0 09:17 pts/1    00:00:00 ps -f

Is there an easy solution to avoid using vi when a tty is not
available? Maybe the commit-msg should start a terminal, or just
refuse the commit with a diagnostic.

Have a nice day,
Berny