lei blob: support retrieving attachments via $OID:$IDX

[public-inbox.git] / lib / PublicInbox / LeiBlob.pm

diff --git a/lib/PublicInbox/LeiBlob.pm b/lib/PublicInbox/LeiBlob.pm
index e4cd4cca58fb10266d0b089da2f79f8cf704db6f..4e52c8a5846e6dbd6bd7472f022fa7793c5bd9f0 100644 (file)
--- a/lib/PublicInbox/LeiBlob.pm
+++ b/lib/PublicInbox/LeiBlob.pm
@@ -84,12 +84,25 @@ sub do_solve_blob { # via wq_do
        $solver->solve($lei->{env}, $log, $self->{oid_b}, $hints);
 }
 
+sub cat_attach_i { # Eml->each_part callback
+       my ($part, $depth, $idx) = @{$_[0]};
+       my $lei = $_[1];
+       my $want = $lei->{-attach_idx} // return;
+       return if $idx ne $want; # [0-9]+(?:\.[0-9]+)+
+       delete $lei->{-attach_idx};
+       $lei->out($part->body);
+}
+
 sub lei_blob {
        my ($lei, $blob) = @_;
        $lei->start_pager if -t $lei->{1};
        my $opt = $lei->{opt};
        my $has_hints = grep(defined, @$opt{qw(oid-a path-a path-b)});
        my $lxs;
+       if ($blob =~ s/:([0-9\.]+)\z//) {
+               $lei->{-attach_idx} = $1;
+               $opt->{mail} = 1;
+       }
 
        # first, see if it's a blob returned by "lei q" JSON output:k
        if ($opt->{mail} // ($has_hints ? 0 : 1)) {
@@ -97,7 +110,7 @@ sub lei_blob {
                        $lxs = $lei->lxs_prepare;
                        $lei->ale->refresh_externals($lxs);
                }
-               my $rdr = { 1 => $lei->{1} };
+               my $rdr = {};
                if ($opt->{mail}) {
                        $rdr->{2} = $lei->{2};
                } else {
@@ -105,7 +118,22 @@ sub lei_blob {
                }
                my $cmd = [ 'git', '--git-dir='.$lei->ale->git->{git_dir},
                                'cat-file', 'blob', $blob ];
-               waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
+               if (defined $lei->{-attach_idx}) {
+                       my $fh = popen_rd($cmd, $lei->{env}, $rdr);
+                       require PublicInbox::Eml;
+                       my $str = do { local $/; <$fh> };
+                       if (close $fh) {
+                               my $eml = PublicInbox::Eml->new(\$str);
+                               $eml->each_part(\&cat_attach_i, $lei, 1);
+                               my $idx = delete $lei->{-attach_idx};
+                               defined($idx) and return $lei->fail(<<EOM);
+E: attachment $idx not found in $blob
+EOM
+                       }
+               } else {
+                       $rdr->{1} = $lei->{1};
+                       waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
+               }
                return if $? == 0;
                return $lei->child_error($?) if $opt->{mail};
        }