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https://github.com/git/git.git
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bf7960eb51
This uses the git-update-ref command in scripts for safer updates. Also places where we used to read HEAD ref by using "cat" were fixed to use git-rev-parse. This will matter when we start using symbolic references. Signed-off-by: Junio C Hamano <junkio@cox.net>
99 lines
2.1 KiB
Bash
Executable file
99 lines
2.1 KiB
Bash
Executable file
#!/bin/sh
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. git-sh-setup || die "Not a git archive"
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tmp=/var/tmp/reset.$$
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trap 'rm -f $tmp-*' 0 1 2 3 15
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reset_type=--mixed
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case "$1" in
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--mixed | --soft | --hard)
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reset_type="$1"
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shift
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;;
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esac
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rev=$(git-rev-parse --verify --default HEAD "$@") || exit
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rev=$(git-rev-parse --verify $rev^0) || exit
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# We need to remember the set of paths that _could_ be left
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# behind before a hard reset, so that we can remove them.
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if test "$reset_type" = "--hard"
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then
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{
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git-ls-files --stage -z
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git-rev-parse --verify HEAD 2>/dev/null &&
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git-ls-tree -r -z HEAD
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} | perl -e '
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use strict;
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my %seen;
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$/ = "\0";
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while (<>) {
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chomp;
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my ($info, $path) = split(/\t/, $_);
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next if ($info =~ / tree /);
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if (!$seen{$path}) {
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$seen{$path} = 1;
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print "$path\0";
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}
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}
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' >$tmp-exists
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fi
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# Soft reset does not touch the index file nor the working tree
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# at all, but requires them in a good order. Other resets reset
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# the index file to the tree object we are switching to.
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if test "$reset_type" = "--soft"
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then
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if test -f "$GIT_DIR/MERGE_HEAD" ||
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test "" != "$(git-ls-files --unmerged)"
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then
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die "Cannot do a soft reset in the middle of a merge."
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fi
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else
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git-read-tree --reset "$rev" || exit
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fi
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# Any resets update HEAD to the head being switched to.
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if orig=$(git-rev-parse --verify HEAD 2>/dev/null)
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then
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echo "$orig" >"$GIT_DIR/ORIG_HEAD"
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else
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rm -f "$GIT_DIR/ORIG_HEAD"
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fi
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git-update-ref HEAD "$rev"
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case "$reset_type" in
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--hard )
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# Hard reset matches the working tree to that of the tree
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# being switched to.
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git-checkout-index -f -u -q -a
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git-ls-files --cached -z |
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perl -e '
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use strict;
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my (%keep, $fh);
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$/ = "\0";
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while (<STDIN>) {
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chomp;
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$keep{$_} = 1;
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}
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open $fh, "<", $ARGV[0]
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or die "cannot open $ARGV[0]";
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while (<$fh>) {
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chomp;
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if (! exists $keep{$_}) {
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# it is ok if this fails -- it may already
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# have been culled by checkout-index.
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unlink $_;
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}
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}
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' $tmp-exists
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;;
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--soft )
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;; # Nothing else to do
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--mixed )
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# Report what has not been updated.
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git-update-index --refresh
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;;
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esac
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rm -f "$GIT_DIR/MERGE_HEAD"
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