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git-svn: --follow-parent now works on sub-directories of larger branches 

This means that tracking the path of:

  /another-larger/trunk/thunk/bump/thud inside a repository

would follow:

  /larger-parent/trunk/thunk/bump/thud

even if the svn log output looks like this:
  --------------------------------------------
  Changed paths:
     A /another-larger (from /larger-parent:5)
  --------------------------------------------

Note: the usage of get_log() in git-svn still makes a
an assumption that shouldn't be made with regard to
revisions existing for a particular path.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
Eric Wong 2007-01-24 02:16:25 -08:00
parent e6434f8760
commit 7f578c55af
2 changed files with 40 additions and 8 deletions
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31
git-svn.perl
View File

@ -1102,9 +1102,21 @@ sub find_parent_branch {
return undef unless $::_follow_parent;
# look for a parent from another branch:
my $abs_path = '/'.$self->rel_path;
my $i = $paths->{$abs_path} or goto not_found;
my @b_path_components = split m#/#, $self->rel_path;
my @a_path_components;
my $i;
while (@b_path_components) {
$i = $paths->{'/'.join('/', @b_path_components)};
last if $i;
unshift(@a_path_components, pop(@b_path_components));
}
goto not_found unless defined $i;
my $branch_from = $i->copyfrom_path or goto not_found;
if (@a_path_components) {
print STDERR "branch_from: $branch_from => ";
$branch_from .= '/'.join('/', @a_path_components);
print STDERR $branch_from, "\n";
}
my $r = $i->copyfrom_rev;
my $repos_root = $self->ra->{repos_root};
my $url = $self->ra->{url};
@ -1134,10 +1146,11 @@ sub find_parent_branch {
}
my ($r0, $parent) = $gs->find_rev_before($r, 1);
if ($::_follow_parent && (!defined $r0 || !defined $parent)) {
foreach (0 .. $r) {
my $log_entry = eval { $gs->do_fetch(undef, $_) };
$gs->ra->get_log([$gs->{path}], 0, $r, 0, 1, 1, sub {
my ($paths, $rev) = @_;
my $log_entry = eval { $gs->do_fetch($paths, $rev) };
$gs->do_git_commit($log_entry) if $log_entry;
}
});
($r0, $parent) = $gs->last_rev_commit;
}
if (defined $r0 && defined $parent && $gs->revisions_eq($r0, $r)) {
@ -1164,10 +1177,12 @@ sub find_parent_branch {
return $self->make_log_entry($rev, [$parent], $ed);
}
not_found:
print STDERR "Branch parent for path: '$abs_path' not found\n";
print STDERR "Branch parent for path: '/",
$self->rel_path, "' not found\n";
return undef unless $paths;
foreach my $p (sort keys %$paths) {
print STDERR ' ', $p->action, ' ', $p;
foreach my $x (sort keys %$paths) {
my $p = $paths->{$x};
print STDERR ' ', $p->action, ' ', $x;
if (my $cp_from = $p->copyfrom_path) {
print STDERR "(from $cp_from:", $p->copyfrom_rev, ')';
}

17
t/t9104-git-svn-follow-parent.sh
View File

@ -61,6 +61,23 @@ test_expect_success 'follow deleted parent' "
= \"\`git rev-parse svn/trunk\`\"
"
test_expect_success 'follow larger parent' "
mkdir -p import/trunk/thunk/bump/thud &&
echo hi > import/trunk/thunk/bump/thud/file &&
svn import -m 'import a larger parent' import $svnrepo/larger-parent &&
svn cp -m 'hi' $svnrepo/larger-parent $svnrepo/another-larger &&
git-svn init -i larger $svnrepo/another-larger/trunk/thunk/bump/thud &&
git-svn fetch -i larger --follow-parent &&
git-rev-parse --verify refs/remotes/larger &&
git-rev-parse --verify \
refs/remotes/larger-parent/trunk/thunk/bump/thud &&
test \"\`git-merge-base \
refs/remotes/larger-parent/trunk/thunk/bump/thud \
refs/remotes/larger\`\" = \
\"\`git-rev-parse refs/remotes/larger\`\"
true
"
test_debug 'gitk --all &'
test_done