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Tip revision: 8d712aafd2df3c1f5147a28947f98cefe667cf76 authored by Junio C Hamano on 21 December 2005, 21:51:51 UTC
GIT 1.0.0b
GIT 1.0.0b
Tip revision: 8d712aa
git-reset.sh
#!/bin/sh
USAGE='[--mixed | --soft | --hard] [<commit-ish>]'
. git-sh-setup
tmp=/var/tmp/reset.$$
trap 'rm -f $tmp-*' 0 1 2 3 15
reset_type=--mixed
case "$1" in
--mixed | --soft | --hard)
reset_type="$1"
shift
;;
-*)
usage ;;
esac
rev=$(git-rev-parse --verify --default HEAD "$@") || exit
rev=$(git-rev-parse --verify $rev^0) || exit
# We need to remember the set of paths that _could_ be left
# behind before a hard reset, so that we can remove them.
if test "$reset_type" = "--hard"
then
{
git-ls-files --stage -z
git-rev-parse --verify HEAD 2>/dev/null &&
git-ls-tree -r -z HEAD
} | perl -e '
use strict;
my %seen;
$/ = "\0";
while (<>) {
chomp;
my ($info, $path) = split(/\t/, $_);
next if ($info =~ / tree /);
if (!$seen{$path}) {
$seen{$path} = 1;
print "$path\0";
}
}
' >$tmp-exists
fi
# Soft reset does not touch the index file nor the working tree
# at all, but requires them in a good order. Other resets reset
# the index file to the tree object we are switching to.
if test "$reset_type" = "--soft"
then
if test -f "$GIT_DIR/MERGE_HEAD" ||
test "" != "$(git-ls-files --unmerged)"
then
die "Cannot do a soft reset in the middle of a merge."
fi
else
git-read-tree --reset "$rev" || exit
fi
# Any resets update HEAD to the head being switched to.
if orig=$(git-rev-parse --verify HEAD 2>/dev/null)
then
echo "$orig" >"$GIT_DIR/ORIG_HEAD"
else
rm -f "$GIT_DIR/ORIG_HEAD"
fi
git-update-ref HEAD "$rev"
case "$reset_type" in
--hard )
# Hard reset matches the working tree to that of the tree
# being switched to.
git-checkout-index -f -u -q -a
git-ls-files --cached -z |
perl -e '
use strict;
my (%keep, $fh);
$/ = "\0";
while (<STDIN>) {
chomp;
$keep{$_} = 1;
}
open $fh, "<", $ARGV[0]
or die "cannot open $ARGV[0]";
while (<$fh>) {
chomp;
if (! exists $keep{$_}) {
# it is ok if this fails -- it may already
# have been culled by checkout-index.
unlink $_;
}
}
' $tmp-exists
;;
--soft )
;; # Nothing else to do
--mixed )
# Report what has not been updated.
git-update-index --refresh
;;
esac
rm -f "$GIT_DIR/MERGE_HEAD"