git-svn: several graft-branches improvements
The 'graft-branches' command can now analyze tree matches for merge detection after commits are done, when --branch or --branch-all-refs options are used. We ensure that tree joins (--branch and --branch-all-refs options) during commit time only add SVN parents that occurred before the commit we're importing Also fixed branch detection via merge messages, this manner of merge detection (a la git-svnimport) is really all fuzzy, but at least it actually works now :) Add some new tests to go along with these fixes, too. Signed-off-by: Eric Wong <normalperson@yhbt.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Eric Wong
Junio C Hamano
parent
dc62e25cbd
commit
c1927a8554
@ -34,6 +34,8 @@ use POSIX qw/strftime/;
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use IPC::Open3;
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use Memoize;
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memoize('revisions_eq');
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memoize('cmt_metadata');
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memoize('get_commit_time');
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my ($SVN_PATH, $SVN, $SVN_LOG, $_use_lib);
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$_use_lib = 1 unless $ENV{GIT_SVN_NO_LIB};
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@ -91,6 +93,8 @@ my %cmd = (
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'graft-branches' => [ \&graft_branches,
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'Detect merges/branches from already imported history',
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{ 'merge-rx|m' => \@_opt_m,
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'branch|b=s' => \@_branch_from,
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'branch-all-refs|B' => \$_branch_all_refs,
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'no-default-regex' => \$_no_default_regex,
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'no-graft-copy' => \$_no_graft_copy } ],
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'multi-init' => [ \&multi_init,
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@ -590,13 +594,14 @@ sub graft_branches {
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my $l_map = read_url_paths();
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my @re = map { qr/$_/is } @_opt_m if @_opt_m;
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unless ($_no_default_regex) {
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push @re, ( qr/\b(?:merge|merging|merged)\s+(\S.+)/is,
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qr/\b(?:from|of)\s+(\S.+)/is );
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push @re, (qr/\b(?:merge|merging|merged)\s+with\s+([\w\.\-]+)/i,
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qr/\b(?:merge|merging|merged)\s+([\w\.\-]+)/i,
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qr/\b(?:from|of)\s+([\w\.\-]+)/i );
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}
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foreach my $u (keys %$l_map) {
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if (@re) {
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foreach my $p (keys %{$l_map->{$u}}) {
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graft_merge_msg($grafts,$l_map,$u,$p);
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graft_merge_msg($grafts,$l_map,$u,$p,@re);
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}
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}
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unless ($_no_graft_copy) {
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@ -607,6 +612,7 @@ sub graft_branches {
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}
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}
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}
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graft_tree_joins($grafts);
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write_grafts($grafts, $comments, $gr_file);
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unlink "$gr_file~$gr_sha1" if $gr_sha1;
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@ -879,6 +885,77 @@ sub common_prefix {
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return '';
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}
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# grafts set here are 'stronger' in that they're based on actual tree
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# matches, and won't be deleted from merge-base checking in write_grafts()
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sub graft_tree_joins {
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my $grafts = shift;
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map_tree_joins() if (@_branch_from && !%tree_map);
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return unless %tree_map;
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git_svn_each(sub {
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my $i = shift;
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defined(my $pid = open my $fh, '-|') or croak $!;
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if (!$pid) {
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exec qw/git-rev-list --pretty=raw/,
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"refs/remotes/$i" or croak $!;
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}
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while (<$fh>) {
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next unless /^commit ($sha1)$/o;
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my $c = $1;
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my ($t) = (<$fh> =~ /^tree ($sha1)$/o);
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next unless $tree_map{$t};
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my $l;
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do {
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$l = readline $fh;
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} until ($l =~ /^committer (?:.+) (\d+) ([\-\+]?\d+)$/);
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my ($s, $tz) = ($1, $2);
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if ($tz =~ s/^\+//) {
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$s += tz_to_s_offset($tz);
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} elsif ($tz =~ s/^\-//) {
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$s -= tz_to_s_offset($tz);
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}
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my ($url_a, $r_a, $uuid_a) = cmt_metadata($c);
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foreach my $p (@{$tree_map{$t}}) {
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next if $p eq $c;
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my $mb = eval {
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safe_qx('git-merge-base', $c, $p)
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};
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next unless ($@ || $?);
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if (defined $r_a) {
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# see if SVN says it's a relative
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my ($url_b, $r_b, $uuid_b) =
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cmt_metadata($p);
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next if (defined $url_b &&
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defined $url_a &&
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($url_a eq $url_b) &&
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($uuid_a eq $uuid_b));
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if ($uuid_a eq $uuid_b) {
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if ($r_b < $r_a) {
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$grafts->{$c}->{$p} = 2;
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next;
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} elsif ($r_b > $r_a) {
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$grafts->{$p}->{$c} = 2;
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next;
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}
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}
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}
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my $ct = get_commit_time($p);
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if ($ct < $s) {
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$grafts->{$c}->{$p} = 2;
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} elsif ($ct > $s) {
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$grafts->{$p}->{$c} = 2;
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}
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# what should we do when $ct == $s ?
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}
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}
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close $fh or croak $?;
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});
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}
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# this isn't funky-filename safe, but good enough for now...
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sub graft_file_copy_cmd {
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my ($grafts, $l_map, $u) = @_;
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@ -957,7 +1034,7 @@ sub process_merge_msg_matches {
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my $re = qr/\Q$w\E/i;
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foreach (keys %{$l_map->{$u}}) {
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if (/$re/) {
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push @strong, $_;
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push @strong, $l_map->{$u}->{$_};
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last;
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}
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}
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@ -966,7 +1043,7 @@ sub process_merge_msg_matches {
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$re = qr/\Q$w\E/i;
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foreach (keys %{$l_map->{$u}}) {
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if (/$re/) {
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push @strong, $_;
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push @strong, $l_map->{$u}->{$_};
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last;
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}
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}
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@ -979,7 +1056,7 @@ sub process_merge_msg_matches {
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return unless defined $rev;
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}
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foreach my $m (@strong) {
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my ($r0, $s0) = find_rev_before($rev, $m);
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my ($r0, $s0) = find_rev_before($rev, $m, 1);
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$grafts->{$c->{c}}->{$s0} = 1 if defined $s0;
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}
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}
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@ -1791,7 +1868,26 @@ sub git_commit {
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restore_index($index);
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}
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if (exists $tree_map{$tree}) {
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push @tmp_parents, @{$tree_map{$tree}};
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foreach my $p (@{$tree_map{$tree}}) {
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my $skip;
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foreach (@tmp_parents) {
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# see if a common parent is found
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my $mb = eval {
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safe_qx('git-merge-base', $_, $p)
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};
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next if ($@ || $?);
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$skip = 1;
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last;
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}
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next if $skip;
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my ($url_p, $r_p, $uuid_p) = cmt_metadata($p);
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next if (($SVN_UUID eq $uuid_p) &&
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($log_msg->{revision} > $r_p));
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next if (defined $url_p && defined $SVN_URL &&
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($SVN_UUID eq $uuid_p) &&
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($url_p eq $SVN_URL));
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push @tmp_parents, $p;
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}
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}
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foreach (@tmp_parents) {
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next if $seen_parent{$_};
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@ -2119,6 +2215,7 @@ sub init_vars {
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$GIT_SVN_INDEX = "$GIT_SVN_DIR/index";
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$SVN_URL = undef;
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$SVN_WC = "$GIT_SVN_DIR/tree";
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%tree_map = ();
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}
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# convert GetOpt::Long specs for use by git-repo-config
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@ -2186,6 +2283,7 @@ sub write_grafts {
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print $fh $_ foreach @{$comments->{$c}};
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}
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my $p = $grafts->{$c};
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my %x; # real parents
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delete $p->{$c}; # commits are not self-reproducing...
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my $pid = open my $ch, '-|';
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defined $pid or croak $!;
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@ -2193,13 +2291,41 @@ sub write_grafts {
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exec(qw/git-cat-file commit/, $c) or croak $!;
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}
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while (<$ch>) {
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if (/^parent ([a-f\d]{40})/) {
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$p->{$1} = 1;
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if (/^parent ($sha1)/) {
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$x{$1} = $p->{$1} = 1;
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} else {
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last unless /^\S/i;
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last unless /^\S/;
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}
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}
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close $ch; # breaking the pipe
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# if real parents are the only ones in the grafts, drop it
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next if join(' ',sort keys %$p) eq join(' ',sort keys %x);
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my (@ip, @jp, $mb);
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my %del = %x;
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@ip = @jp = keys %$p;
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foreach my $i (@ip) {
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next if $del{$i} || $p->{$i} == 2;
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foreach my $j (@jp) {
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next if $i eq $j || $del{$j} || $p->{$j} == 2;
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$mb = eval { safe_qx('git-merge-base',$i,$j) };
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next unless $mb;
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chomp $mb;
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next if $x{$mb};
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if ($mb eq $j) {
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delete $p->{$i};
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$del{$i} = 1;
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} elsif ($mb eq $i) {
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delete $p->{$j};
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$del{$j} = 1;
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}
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}
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}
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# if real parents are the only ones in the grafts, drop it
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next if join(' ',sort keys %$p) eq join(' ',sort keys %x);
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print $fh $c, ' ', join(' ', sort keys %$p),"\n";
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}
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if ($comments->{'END'}) {
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@ -2219,7 +2345,7 @@ sub read_url_paths {
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}
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sub extract_metadata {
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my $id = shift;
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my $id = shift or return (undef, undef, undef);
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my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+)
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\s([a-f\d\-]+)$/x);
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if (!$rev || !$uuid || !$url) {
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@ -2230,6 +2356,31 @@ sub extract_metadata {
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return ($url, $rev, $uuid);
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}
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sub cmt_metadata {
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return extract_metadata((grep(/^git-svn-id: /,
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safe_qx(qw/git-cat-file commit/, shift)))[-1]);
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}
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sub get_commit_time {
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my $cmt = shift;
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defined(my $pid = open my $fh, '-|') or croak $!;
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if (!$pid) {
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exec qw/git-rev-list --pretty=raw -n1/, $cmt or croak $!;
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}
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while (<$fh>) {
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/^committer\s(?:.+) (\d+) ([\-\+]?\d+)$/ or next;
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my ($s, $tz) = ($1, $2);
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if ($tz =~ s/^\+//) {
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$s += tz_to_s_offset($tz);
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} elsif ($tz =~ s/^\-//) {
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$s -= tz_to_s_offset($tz);
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}
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close $fh;
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return $s;
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}
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die "Can't get commit time for commit: $cmt\n";
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}
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sub tz_to_s_offset {
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my ($tz) = @_;
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$tz =~ s/(\d\d)$//;
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@ -2498,8 +2649,7 @@ sub svn_grab_base_rev {
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chomp(my $c = do { local $/; <$fh> });
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close $fh;
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if (defined $c && length $c) {
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my ($url, $rev, $uuid) = extract_metadata((grep(/^git-svn-id: /,
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safe_qx(qw/git-cat-file commit/, $c)))[-1]);
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my ($url, $rev, $uuid) = cmt_metadata($c);
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return ($rev, $c);
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}
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return (undef, undef);
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@ -2655,6 +2805,10 @@ sub find_graft_path_parents {
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my $i = $tree_paths->{$x};
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my ($r, $parent) = find_rev_before($r0, $i, 1);
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if (defined $r && defined $parent && revisions_eq($x,$r,$r0)) {
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my ($url_b, undef, $uuid_b) = cmt_metadata($c);
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my ($url_a, undef, $uuid_a) = cmt_metadata($parent);
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next if ($url_a && $url_b && $url_a eq $url_b &&
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$uuid_b eq $uuid_a);
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$grafts->{$c}->{$parent} = 1;
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}
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}
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63
contrib/git-svn/t/t0003-graft-branches.sh
Normal file
63
contrib/git-svn/t/t0003-graft-branches.sh
Normal file
@ -0,0 +1,63 @@
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test_description='git-svn graft-branches'
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. ./lib-git-svn.sh
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test_expect_success 'initialize repo' "
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mkdir import &&
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cd import &&
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mkdir -p trunk branches tags &&
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echo hello > trunk/readme &&
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svn import -m 'import for git-svn' . $svnrepo &&
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cd .. &&
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svn cp -m 'tag a' $svnrepo/trunk $svnrepo/tags/a &&
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svn cp -m 'branch a' $svnrepo/trunk $svnrepo/branches/a &&
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svn co $svnrepo wc &&
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cd wc &&
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echo feedme >> branches/a/readme &&
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svn commit -m hungry &&
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svn up &&
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cd trunk &&
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svn merge -r3:4 $svnrepo/branches/a &&
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svn commit -m 'merge with a' &&
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cd ../.. &&
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svn log -v $svnrepo &&
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git-svn init -i trunk $svnrepo/trunk &&
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git-svn init -i a $svnrepo/branches/a &&
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git-svn init -i tags/a $svnrepo/tags/a &&
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git-svn fetch -i tags/a &&
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git-svn fetch -i a &&
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git-svn fetch -i trunk
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"
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r1=`git-rev-list remotes/trunk | tail -n1`
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r2=`git-rev-list remotes/tags/a | tail -n1`
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r3=`git-rev-list remotes/a | tail -n1`
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r4=`git-rev-list remotes/a | head -n1`
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r5=`git-rev-list remotes/trunk | head -n1`
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test_expect_success 'test graft-branches regexes and copies' "
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test -n "$r1" &&
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test -n "$r2" &&
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test -n "$r3" &&
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test -n "$r4" &&
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test -n "$r5" &&
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git-svn graft-branches &&
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grep '^$r2 $r1' $GIT_DIR/info/grafts &&
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grep '^$r3 $r1' $GIT_DIR/info/grafts &&
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grep '^$r5 ' $GIT_DIR/info/grafts | grep '$r4' | grep '$r1'
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"
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test_debug 'gitk --all & sleep 1'
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test_expect_success 'test graft-branches with tree-joins' "
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rm $GIT_DIR/info/grafts &&
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git-svn graft-branches --no-default-regex --no-graft-copy -B &&
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grep '^$r3 ' $GIT_DIR/info/grafts | grep '$r1' | grep '$r2' &&
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grep '^$r2 $r1' $GIT_DIR/info/grafts &&
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grep '^$r5 ' $GIT_DIR/info/grafts | grep '$r1' | grep '$r4'
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"
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# the result of this is kinda funky, we have a strange history and
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# this is just a test :)
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test_debug 'gitk --all &'
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test_done
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