1 # Copyright (C) 2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # "lei blob $OID" command
5 # TODO: this doesn't scan submodules, but maybe it should
6 package PublicInbox::LeiBlob;
9 use parent qw(PublicInbox::IPC);
10 use PublicInbox::Spawn qw(spawn popen_rd which);
13 sub sol_done_wait { # dwaitpid callback
15 my (undef, $lei) = @$arg;
16 $lei->child_error($?) if $?;
20 sub sol_done { # EOF callback for main daemon
22 my $sol = delete $lei->{sol} // return $lei->dclose; # already failed
23 $sol->wq_wait_old(\&sol_done_wait, $lei);
28 return $d if -d "$d/objects" && -d "$d/refs" && -e "$d/HEAD";
30 my $cmd = [ qw(git rev-parse --git-dir) ];
31 my ($r, $pid) = popen_rd($cmd, {GIT_DIR => undef}, { '-C' => $d });
32 chomp(my $gd = do { local $/; <$r> });
33 waitpid($pid, 0) == $pid or die "BUG: waitpid @$cmd ($!)";
34 $? == 0 ? $gd : undef;
37 sub solver_user_cb { # called by solver when done
38 my ($res, $self) = @_;
39 my $lei = $self->{lei};
40 my $log_buf = delete $lei->{'log_buf'};
41 $$log_buf =~ s/^/# /sgm;
42 ref($res) eq 'ARRAY' or return $lei->child_error(1 << 8, $$log_buf);
43 $lei->qerr($$log_buf);
44 my ($git, $oid, $type, $size, $di) = @$res;
45 my $gd = $git->{git_dir};
47 # don't try to support all the git-show(1) options for non-blob,
48 # this is just a convenience:
50 $lei->err("# $oid is a $type of $size bytes in:\n#\t$gd");
52 my $cmd = [ 'git', "--git-dir=$gd", 'show', $oid ];
53 my $rdr = { 1 => $lei->{1}, 2 => $lei->{2} };
54 waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
55 $lei->child_error($?) if $?;
58 sub do_solve_blob { # via wq_do
60 my $lei = $self->{lei};
61 my $git_dirs = $lei->{opt}->{'git-dir'};
63 for my $x (qw(oid-a path-a path-b)) {
64 my $v = $lei->{opt}->{$x} // next;
68 open my $log, '+>', \(my $log_buf = '') or die "PerlIO::scalar: $!";
69 $lei->{log_buf} = \$log_buf;
70 my $git = $lei->{ale}->git;
72 PublicInbox::LeiRemote->new($lei, $_)
73 } $self->{lxs}->remotes;
76 PublicInbox::Git->new($lei->rel2abs($_))
78 user_cb => \&solver_user_cb,
80 # -cur_di, -qsp, -msg => temporary fields for Qspawn callbacks
81 inboxes => [ $self->{lxs}->locals, @rmt ],
82 }, 'PublicInbox::SolverGit';
83 $lei->{env}->{'psgi.errors'} = $lei->{2}; # ugh...
84 local $PublicInbox::DS::in_loop = 0; # waitpid synchronously
85 $solver->solve($lei->{env}, $log, $self->{oid_b}, $hints);
89 my ($lei, $blob) = @_;
90 $lei->start_pager if -t $lei->{1};
91 my $opt = $lei->{opt};
92 my $has_hints = grep(defined, @$opt{qw(oid-a path-a path-b)});
94 # first, see if it's a blob returned by "lei q" JSON output:k
95 if ($opt->{mail} // ($has_hints ? 0 : 1)) {
96 my $rdr = { 1 => $lei->{1} };
97 open $rdr->{2}, '>', '/dev/null' or die "open: $!";
98 my $cmd = [ 'git', '--git-dir='.$lei->ale->git->{git_dir},
99 'cat-file', 'blob', $blob ];
100 waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
104 # maybe it's a non-email (code) blob from a coderepo
105 my $git_dirs = $opt->{'git-dir'} //= [];
106 if ($opt->{'cwd'} // 1) {
107 my $cgd = get_git_dir('.');
108 unshift(@$git_dirs, $cgd) if defined $cgd;
110 return $lei->fail('no --git-dir to try') unless @$git_dirs;
111 my $lxs = $lei->lxs_prepare or return;
113 require PublicInbox::LeiRemote;
114 $lei->{curl} //= which('curl') or return
115 $lei->fail('curl needed for', $lxs->remotes);
116 $lei->_lei_store(1)->write_prepare($lei);
118 require PublicInbox::SolverGit;
119 my $self = bless { lxs => $lxs, oid_b => $blob }, __PACKAGE__;
121 my ($op_c, $ops) = $lei->workers_start($self, 'lei_solve', 1,
122 { '' => [ \&sol_done, $lei ] });
124 $self->wq_io_do('do_solve_blob', []);
126 $op_c->op_wait_event($ops);
129 sub ipc_atfork_child {
131 $self->{lei}->_lei_atfork_child;
132 $SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
133 $self->SUPER::ipc_atfork_child;