diff options
| -rwxr-xr-x | git-reset-script | 96 |
1 files changed, 90 insertions, 6 deletions
diff --git a/git-reset-script b/git-reset-script index 7da8d86823..863e2a997e 100755 --- a/git-reset-script +++ b/git-reset-script @@ -1,13 +1,97 @@ #!/bin/sh . git-sh-setup-script || die "Not a git archive" + +tmp=/var/tmp/reset.$$ +trap 'rm -f $tmp-*' 0 1 2 3 15 + +reset_type=--mixed +case "$1" in +--mixed | --soft | --hard) + reset_type="$1" + shift + ;; +esac + rev=$(git-rev-parse --verify --default HEAD "$@") || exit rev=$(git-rev-parse --verify $rev^0) || exit -git-read-tree --reset "$rev" && { - if orig=$(git-rev-parse --verify HEAD 2>/dev/null) + +# We need to remember the set of paths that _could_ be left +# behind before a hard reset, so that we can remove them. +if test "$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 "" != "$(git-ls-files --unmerged)" then - echo "$orig" >"$GIT_DIR/ORIG_HEAD" + die "Cannot do a soft reset in the middle of a merge." fi - echo "$rev" > "$GIT_DIR/HEAD" -} -git-update-cache --refresh +else + git-read-tree --reset "$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 +echo "$rev" >"$GIT_DIR/HEAD" + +case "$reset_type" in +--hard ) + # Hard reset matches the working tree to that of the tree + # being switched to. + git-checkout-cache -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 $keep{$_}) { + print "$_\0"; + } + } + ' $tmp-exists | xargs -0 rm -v -f -- + ;; +--soft ) + ;; # Nothing else to do +--mixed ) + # Report what has not been updated. + git-update-cache --refresh + ;; +esac + rm -f "$GIT_DIR/MERGE_HEAD" |