Dear diary, on Sat, Oct 07, 2006 at 11:33:29AM CEST, I got a letter
where Junio C Hamano <junkio@xxxxxxx> said that...
> When we introduced symref, "cat .git/HEAD" stopped being the way
> to read the value of the tip of the current branch, "echo
> $commit >.git/HEAD" stopped being the way to update it, and
> "rev-parse --verify HEAD" and "update-ref HEAD $commit" were
> introduced at the same time as the official alternatives to
> support both old and new implementations of .git/HEAD.
>
> The way to find out which branch we are currently on used to be
> "readlink .git/HEAD"; that stopped to be true, and we introduced
> "symbolic-ref HEAD" as the official alternative to support both
> old and new implementation.
>
> The way to see if a random symbolic link whose name happens to
> be HEAD is a symref has been to see if it points at a path that
> begins with "refs/".
Cogito does
[ ! -s "$_git/HEAD" ] || { _git_head="$(git-symbolic-ref HEAD)"; _git_head="${_git_head#refs/heads/}"; }
in the common initialization code, so that cg-reset works even on
repositories with broken HEAD. It hasn't been an issue in the past since
HEAD as a dangling symlink indeed _has_ been broken HEAD in the past.
That said, at least cg-reset will indeed repair it:
if ! [ -s "$_git/HEAD" ]; then
rm -f "$_git/HEAD"
# XXX: git-symbolic-ref is a weenie and won't do the job at this point.
echo "ref: refs/heads/$_git_head" >"$_git/HEAD"
fi
But it's still not nice.
--
Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
#!/bin/perl -sp0777i<X+d*lMLa^*lN%0]dsXx++lMlN/dsM0<j]dsj
$/=unpack('H*',$_);$_=`echo 16dio\U$k"SK$/SM$n\EsN0p[lN*1
lK[d2%Sa2/d0$^Ixp"|dc`;s/\W//g;$_=pack('H*',/((..)*)$/)
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