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| | # Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# "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(run_wait run_qx which);
use PublicInbox::DS;
use PublicInbox::Eml;
use PublicInbox::Git;
use PublicInbox::IO qw(read_all);
sub get_git_dir ($$) {
my ($lei, $d) = @_;
return $d if -d "$d/objects" && -d "$d/refs" && -e "$d/HEAD";
my $cmd = [ qw(git rev-parse --git-dir) ];
my $opt = { '-C' => $d };
if (defined($lei->{opt}->{cwd})) { # --cwd used, report errors
$opt->{2} = $lei->{2};
} else { # implicit --cwd, quiet errors
open $opt->{2}, '>', '/dev/null' or die "open /dev/null: $!";
}
chomp(my $git_dir = run_qx($cmd, {GIT_DIR => undef}, $opt));
$? ? undef : $git_dir;
}
sub solver_user_cb { # called by solver when done
my ($res, $self) = @_;
my $lei = $self->{lei};
my $log_buf = delete $lei->{'log_buf'};
$$log_buf =~ s/^/# /sgm;
ref($res) eq 'ARRAY' or return $lei->child_error(0, $$log_buf);
$lei->qerr($$log_buf);
my ($git, $oid, $type, $size, $di) = @$res;
# don't try to support all the git-show(1) options for non-blob,
# this is just a convenience:
$type ne 'blob' and warn <<EOM;
# $oid is a $type of $size bytes in:\n#\t$git->{git_dir}
EOM
my $cmd = $git->cmd('show', $oid);
my $rdr = { 1 => $lei->{1}, 2 => $lei->{2} };
run_wait($cmd, $lei->{env}, $rdr) and $lei->child_error($?);
}
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, -msg => temporary fields for Qspawn callbacks
inboxes => [ $self->{lxs}->locals, @rmt ],
}, 'PublicInbox::SolverGit';
local $PublicInbox::DS::in_loop = 0; # waitpid synchronously
$solver->solve($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 extract_attach ($$$) {
my ($lei, $blob, $bref) = @_;
my $eml = PublicInbox::Eml->new($bref);
$eml->each_part(\&cat_attach_i, $lei, 1);
my $idx = delete $lei->{-attach_idx};
defined($idx) and return $lei->fail(<<EOM);
E: attachment $idx not found in $blob
EOM
}
sub lei_blob {
my ($lei, $blob) = @_;
$lei->start_pager if -t $lei->{1};
my $opt = $lei->{opt};
my $has_hints = grep(defined, @$opt{qw(oid-a path-a path-b)});
my $lxs;
if ($blob =~ s/:([0-9\.]+)\z//) {
$lei->{-attach_idx} = $1;
$opt->{mail} = 1;
}
# first, see if it's a blob returned by "lei q" JSON output:k
if ($opt->{mail} // ($has_hints ? 0 : 1)) {
if (grep(defined, @$opt{qw(include only)})) {
$lxs = $lei->lxs_prepare;
$lei->ale->refresh_externals($lxs, $lei);
}
my $rdr = {};
if ($opt->{mail}) {
open $rdr->{2}, '+>', undef or die "open: $!";
} else {
open $rdr->{2}, '>', '/dev/null' or die "open: $!";
}
my $cmd = $lei->ale->git->cmd('cat-file', 'blob', $blob);
my $cerr;
if (defined $lei->{-attach_idx}) {
my $buf = run_qx($cmd, $lei->{env}, $rdr);
return extract_attach($lei, $blob, \$buf) unless $?;
$cerr = $?;
} else {
$rdr->{1} = $lei->{1}; # write directly to client
$cerr = run_wait($cmd, $lei->{env}, $rdr) or return;
}
# fall back to unimported ('lei index') and inflight blobs
my $lms = $lei->lms;
my $bref = ($lms ? $lms->local_blob($blob, 1) : undef) // do {
my $sto = $lei->{sto} // $lei->_lei_store;
$sto && $sto->{-wq_s1} ? $sto->wq_do('cat_blob', $blob)
: undef;
};
$bref and return $lei->{-attach_idx} ?
extract_attach($lei, $blob, $bref) :
$lei->out($$bref);
if ($opt->{mail}) {
seek($rdr->{2}, 0, 0);
return $lei->child_error($cerr, read_all($rdr->{2}));
} # else: fall through to solver below
}
# maybe it's a non-email (code) blob from a coderepo
my $git_dirs = $opt->{'git-dir'} //= [];
if ($opt->{'cwd'} // 1) {
my $cgd = get_git_dir($lei, '.');
unshift(@$git_dirs, $cgd) if defined $cgd;
}
return $lei->fail('no --git-dir to try') unless @$git_dirs;
unless ($lxs) {
$lxs = $lei->lxs_prepare or return;
$lei->ale->refresh_externals($lxs, $lei);
}
if ($lxs->remotes) {
require PublicInbox::LeiRemote;
$lei->{curl} //= which('curl') or return
$lei->fail('curl needed for '.join(', ',$lxs->remotes));
$lei->_lei_store(1)->write_prepare($lei);
}
require PublicInbox::SolverGit;
my $self = bless { lxs => $lxs, oid_b => $blob }, __PACKAGE__;
my ($op_c, $ops) = $lei->workers_start($self, 1);
$lei->{wq1} = $self;
$self->wq_io_do('do_solve_blob', []);
$self->wq_close;
$lei->wait_wq_events($op_c, $ops);
}
sub ipc_atfork_child {
my ($self) = @_;
$self->{lei}->_lei_atfork_child;
$self->SUPER::ipc_atfork_child;
}
1;
|