# Copyright (C) 2021 all contributors
# License: AGPL-3.0+
# "lei blob $OID" command
# TODO: this doesn't scan submodules, but maybe it should
package PublicInbox::LeiBlob;
use strict;
use v5.10.1;
use parent qw(PublicInbox::IPC);
use PublicInbox::Spawn qw(spawn popen_rd which);
use PublicInbox::DS;
sub sol_done_wait { # dwaitpid callback
my ($arg, $pid) = @_;
my (undef, $lei) = @$arg;
$lei->child_error($?) if $?;
$lei->dclose;
}
sub sol_done { # EOF callback for main daemon
my ($lei) = @_;
my $sol = delete $lei->{sol} // return $lei->dclose; # already failed
$sol->wq_wait_old(\&sol_done_wait, $lei);
}
sub get_git_dir ($) {
my ($d) = @_;
return $d if -d "$d/objects" && -d "$d/refs" && -e "$d/HEAD";
my $cmd = [ qw(git rev-parse --git-dir) ];
my ($r, $pid) = popen_rd($cmd, {GIT_DIR => undef}, { '-C' => $d });
chomp(my $gd = do { local $/; <$r> });
waitpid($pid, 0) == $pid or die "BUG: waitpid @$cmd ($!)";
$? == 0 ? $gd : undef;
}
sub solver_user_cb { # called by solver when done
my ($res, $self) = @_;
my $lei = $self->{lei};
my $log_buf = delete $lei->{'log_buf'};
$$log_buf =~ s/^/# /sgm;
ref($res) eq 'ARRAY' or return $lei->child_error(1 << 8, $$log_buf);
$lei->qerr($$log_buf);
my ($git, $oid, $type, $size, $di) = @$res;
my $gd = $git->{git_dir};
# don't try to support all the git-show(1) options for non-blob,
# this is just a convenience:
$type ne 'blob' and
$lei->err("# $oid is a $type of $size bytes in:\n#\t$gd");
my $cmd = [ 'git', "--git-dir=$gd", 'show', $oid ];
my $rdr = { 1 => $lei->{1}, 2 => $lei->{2} };
waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
$lei->child_error($?) if $?;
}
sub do_solve_blob { # via wq_do
my ($self) = @_;
my $lei = $self->{lei};
my $git_dirs = $lei->{opt}->{'git-dir'};
my $hints = {};
for my $x (qw(oid-a path-a path-b)) {
my $v = $lei->{opt}->{$x} // next;
$x =~ tr/-/_/;
$hints->{$x} = $v;
}
open my $log, '+>', \(my $log_buf = '') or die "PerlIO::scalar: $!";
$lei->{log_buf} = \$log_buf;
my $git = $lei->{ale}->git;
my @rmt = map {
PublicInbox::LeiRemote->new($lei, $_)
} $self->{lxs}->remotes;
my $solver = bless {
gits => [ map {
PublicInbox::Git->new($lei->rel2abs($_))
} @$git_dirs ],
user_cb => \&solver_user_cb,
uarg => $self,
# -cur_di, -qsp, -msg => temporary fields for Qspawn callbacks
inboxes => [ $self->{lxs}->locals, @rmt ],
}, 'PublicInbox::SolverGit';
$lei->{env}->{'psgi.errors'} = $lei->{2}; # ugh...
local $PublicInbox::DS::in_loop = 0; # waitpid synchronously
$solver->solve($lei->{env}, $log, $self->{oid_b}, $hints);
}
sub lei_blob {
my ($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)});
# first, see if it's a blob returned by "lei q" JSON output:k
if ($opt->{mail} // ($has_hints ? 0 : 1)) {
my $rdr = { 1 => $lei->{1} };
open $rdr->{2}, '>', '/dev/null' or die "open: $!";
my $cmd = [ 'git', '--git-dir='.$lei->ale->git->{git_dir},
'cat-file', 'blob', $blob ];
waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
return if $? == 0;
}
# maybe it's a non-email (code) blob from a coderepo
my $git_dirs = $opt->{'git-dir'} //= [];
if ($opt->{'cwd'} // 1) {
my $cgd = get_git_dir('.');
unshift(@$git_dirs, $cgd) if defined $cgd;
}
return $lei->fail('no --git-dir to try') unless @$git_dirs;
my $lxs = $lei->lxs_prepare or return;
if ($lxs->remotes) {
require PublicInbox::LeiRemote;
$lei->{curl} //= which('curl') or return
$lei->fail('curl needed for', $lxs->remotes);
$lei->_lei_store(1)->write_prepare($lei);
}
require PublicInbox::SolverGit;
my $self = bless { lxs => $lxs, oid_b => $blob }, __PACKAGE__;
$lei->ale;
my ($op_c, $ops) = $lei->workers_start($self, 'lei_solve', 1,
{ '' => [ \&sol_done, $lei ] });
$lei->{sol} = $self;
$self->wq_io_do('do_solve_blob', []);
$self->wq_close(1);
$op_c->op_wait_event($ops);
}
sub ipc_atfork_child {
my ($self) = @_;
$self->{lei}->_lei_atfork_child;
$SIG{__WARN__} = PublicInbox::Eml::warn_ignore_cb();
$self->SUPER::ipc_atfork_child;
}
1;