user/dev discussion of public-inbox itself
 help / color / mirror / code / Atom feed
8de86565ab90ad7fb90c1ff385bb8d1b1364107d blob 5509 bytes (raw)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
 
# Copyright (C) 2021 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(spawn popen_rd which);
use PublicInbox::DS;

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: $!";
	}
	my ($r, $pid) = popen_rd($cmd, {GIT_DIR => undef}, $opt);
	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 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);
		}
		my $rdr = {};
		if ($opt->{mail}) {
			open $rdr->{2}, '+>', undef or die "open: $!";
		} else {
			open $rdr->{2}, '>', '/dev/null' or die "open: $!";
		}
		my $cmd = [ 'git', '--git-dir='.$lei->ale->git->{git_dir},
				'cat-file', 'blob', $blob ];
		if (defined $lei->{-attach_idx}) {
			my $fh = popen_rd($cmd, $lei->{env}, $rdr);
			require PublicInbox::Eml;
			my $buf = do { local $/; <$fh> };
			return extract_attach($lei, $blob, \$buf) if close($fh);
		} else {
			$rdr->{1} = $lei->{1};
			waitpid(spawn($cmd, $lei->{env}, $rdr), 0);
		}
		my $ce = $?;
		return if $ce == 0;
		my $sto = $lei->_lei_store;
		my $lms = $sto ? $sto->search->lms : undef;
		if (my $bref = $lms ? $lms->local_blob($blob, 1) : undef) {
			defined($lei->{-attach_idx}) and
				return extract_attach($lei, $blob, $bref);
			return $lei->out($$bref);
		} elsif ($opt->{mail}) {
			my $eh = $rdr->{2};
			seek($eh, 0, 0);
			return $lei->child_error($ce, do { local $/; <$eh> });
		} # 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);
	}
	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 => $blob }, __PACKAGE__;
	my ($op_c, $ops) = $lei->workers_start($self, 1);
	$lei->{wq1} = $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;
	$self->SUPER::ipc_atfork_child;
}

1;
debug log:

solving 8de86565 ...
found 8de86565 in public-inbox.git

Code repositories for project(s) associated with this inbox:

	https://80x24.org/public-inbox.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).