may be bug in svn fetch no-follow-parent

> Git try to follow parents regardless of this option value.
> If branch created without this option then git will follow
> parent succesfully
> If branch created with this option then git try to follow and
> fail with "cannot find common ancestor" error
> If branch does not exists (ignored) then git try to follow and
> fail with "couldn't find revmap" error. It is very long
> operation

> Unfortunately this is not open source repository. I agree that it is pointless try to handle mergeinfo (because it always fails).
> Cases when it is expensive:
> 1. delete and restore mergeinfo property
> 2. merge trunk to very old branch
> 3. create, delete, create branch with --no-follow-parent. All records in mergeinfo will be hadled like new.
> 
> I already patched like this and this is helpfull, works fine and fast.

> Александр Овчинников <proff@proff.email> wrote:
>>  Unfortunately this is not open source repository. I agree that it is pointless try to handle mergeinfo (because it always fails).
>>  Cases when it is expensive:
>>  1. delete and restore mergeinfo property
>>  2. merge trunk to very old branch
>>  3. create, delete, create branch with --no-follow-parent. All records in mergeinfo will be hadled like new.
>>
>>  I already patched like this and this is helpfull, works fine and fast.
>
> Thanks for the info. Patch + pull request below for Junio.
>
>>  I can share only mergeinfo property
>
> Oops, looks like your zip attachment got flagged as spam for
> my mailbox and swallowed by vger.kernel.org :x
>
> ---------8<--------
> Subject: [PATCH] git-svn: skip mergeinfo handling with --no-follow-parent
>
> For repositories without parent following enabled, finding
> git parents through svn:mergeinfo or svk::parents can be
> expensive and pointless.
>
> Reported-by: Александр Овчинников <proff@proff.email>
>         http://mid.gmane.org/4094761466408188@web24o.yandex.ru
>
> Signed-off-by: Eric Wong <e@80x24.org>
> ---
>   The following changes since commit ab7797dbe95fff38d9265869ea367020046db118:
>
>     Start the post-2.9 cycle (2016-06-20 11:06:49 -0700)
>
>   are available in the git repository at:
>
>     git://bogomips.org/git-svn.git svn-nfp-mergeinfo
>
>   for you to fetch changes up to 6d523a3ab76cfa4ed9ae0ed9da7af43efcff3f07:
>
>     git-svn: skip mergeinfo handling with --no-follow-parent (2016-06-22 22:48:54 +0000)
>
>   ----------------------------------------------------------------
>   Eric Wong (1):
>         git-svn: skip mergeinfo handling with --no-follow-parent
>
>  perl/Git/SVN.pm | 25 ++++++++++++++++---------
>  1 file changed, 16 insertions(+), 9 deletions(-)
>
> diff --git a/perl/Git/SVN.pm b/perl/Git/SVN.pm
> index d94d01c..bee1e7d 100644
> --- a/perl/Git/SVN.pm
> +++ b/perl/Git/SVN.pm
> @@ -1905,15 +1905,22 @@ sub make_log_entry {
>
>          my @parents = @$parents;
>          my $props = $ed->{dir_prop}{$self->path};
> - if ( $props->{"svk:merge"} ) {
> - $self->find_extra_svk_parents($props->{"svk:merge"}, \@parents);
> - }
> - if ( $props->{"svn:mergeinfo"} ) {
> - my $mi_changes = $self->mergeinfo_changes
> - ($parent_path, $parent_rev,
> - $self->path, $rev,
> - $props->{"svn:mergeinfo"});
> - $self->find_extra_svn_parents($mi_changes, \@parents);
> + if ($self->follow_parent) {
> + my $tickets = $props->{"svk:merge"};
> + if ($tickets) {
> + $self->find_extra_svk_parents($tickets, \@parents);
> + }
> +
> + my $mergeinfo_prop = $props->{"svn:mergeinfo"};
> + if ($mergeinfo_prop) {
> + my $mi_changes = $self->mergeinfo_changes(
> + $parent_path,
> + $parent_rev,
> + $self->path,
> + $rev,
> + $mergeinfo_prop);
> + $self->find_extra_svn_parents($mi_changes, \@parents);
> + }
>          }
>
>          open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
> --
> EW