1 # Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Backend for `lei' (local email interface). Unlike the C10K-oriented
5 # PublicInbox::Daemon, this is designed exclusively to handle trusted
6 # local clients with read/write access to the FS and use as many
7 # system resources as the local user has access to.
8 package PublicInbox::LEI;
11 use parent qw(PublicInbox::DS PublicInbox::LeiExternal
12 PublicInbox::LeiQuery);
14 use Socket qw(AF_UNIX SOCK_SEQPACKET MSG_EOR pack_sockaddr_un);
15 use Errno qw(EAGAIN EINTR ECONNREFUSED ENOENT ECONNRESET);
18 use Fcntl qw(SEEK_SET);
19 use Sys::Syslog qw(syslog openlog);
20 use PublicInbox::Config;
21 use PublicInbox::Syscall qw(SFD_NONBLOCK EPOLLIN EPOLLET);
22 use PublicInbox::Sigfd;
23 use PublicInbox::DS qw(now dwaitpid);
24 use PublicInbox::Spawn qw(spawn run_die popen_rd);
25 use PublicInbox::OnDestroy;
26 use Text::Wrap qw(wrap);
27 use File::Path qw(mkpath);
29 our $quit = \&CORE::exit;
30 our ($current_lei, $errors_log, $listener);
31 my ($recv_cmd, $send_cmd);
32 my $GLP = Getopt::Long::Parser->new;
33 $GLP->configure(qw(gnu_getopt no_ignore_case auto_abbrev));
34 my $GLP_PASS = Getopt::Long::Parser->new;
35 $GLP_PASS->configure(qw(gnu_getopt no_ignore_case auto_abbrev pass_through));
37 our %PATH2CFG; # persistent for socket daemon
39 # TBD: this is a documentation mechanism to show a subcommand
40 # (may) pass options through to another command:
41 sub pass_through { $GLP_PASS }
45 my ($spec, $re_str) = @_; # 'limit|n=i', '([0-9]+)'
46 my ($key) = ($spec =~ m/\A([a-z]+)/g);
47 my $cb = sub { # Getopt::Long "<>" catch-all handler
49 if ($arg =~ /\A-($re_str)\z/) {
51 } elsif ($arg eq '--') { # "--" arg separator, ignore first
52 push @{$OPT->{-argv}}, $arg if $OPT->{'--'}++;
53 # lone (single) dash is handled elsewhere
54 } elsif (substr($arg, 0, 1) eq '-') {
56 push @{$OPT->{-argv}}, $arg;
58 die "bad argument: $arg\n";
61 push @{$OPT->{-argv}}, $arg;
64 ($spec, '<>' => $cb, $GLP_PASS) # for Getopt::Long
69 File::Spec->rel2abs(($env->{XDG_DATA_HOME} //
70 ($env->{HOME} // '/nonexistent').'/.local/share')
71 .'/lei/store', $env->{PWD});
74 sub _config_path ($) {
76 File::Spec->rel2abs(($env->{XDG_CONFIG_HOME} //
77 ($env->{HOME} // '/nonexistent').'/.config')
78 .'/lei/config', $env->{PWD});
81 # TODO: generate shell completion + help using %CMD and %OPTDESC
82 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
83 our %CMD = ( # sorted in order of importance/use:
84 'q' => [ 'SEARCH_TERMS...', 'search for messages matching terms', qw(
85 save-as=s output|mfolder|o=s format|f=s dedupe|d=s thread|t augment|a
86 sort|s=s reverse|r offset=i remote local! external! pretty mua-cmd=s
87 since|after=s until|before=s), opt_dash('limit|n=i', '[0-9]+') ],
89 'show' => [ 'MID|OID', 'show a given object (Message-ID or object ID)',
90 qw(type=s solve! format|f=s dedupe|d=s thread|t remote local!),
91 pass_through('git show') ],
93 'add-external' => [ 'URL_OR_PATHNAME',
94 'add/set priority of a publicinbox|extindex for extra matches',
95 qw(boost=i quiet|q) ],
96 'ls-external' => [ '[FILTER...]', 'list publicinbox|extindex locations',
97 qw(format|f=s z|0 local remote quiet|q) ],
98 'forget-external' => [ '{URL_OR_PATHNAME|--prune}',
99 'exclude further results from a publicinbox|extindex',
102 'ls-query' => [ '[FILTER...]', 'list saved search queries',
103 qw(name-only format|f=s z) ],
104 'rm-query' => [ 'QUERY_NAME', 'remove a saved search' ],
105 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search' ],
107 'plonk' => [ '--thread|--from=IDENT',
108 'exclude mail matching From: or thread from non-Message-ID searches',
109 qw(stdin| thread|t from|f=s mid=s oid=s) ],
110 'mark' => [ 'MESSAGE_FLAGS...',
111 'set/unset flags on message(s) from stdin',
112 qw(stdin| oid=s exact by-mid|mid:s) ],
113 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
114 "exclude message(s) on stdin from `q' search results",
115 qw(stdin| oid=s exact by-mid|mid:s quiet|q) ],
117 'purge-mailsource' => [ '{URL_OR_PATHNAME|--all}',
118 'remove imported messages from IMAP, Maildirs, and MH',
119 qw(exact! all jobs:i indexed) ],
121 # code repos are used for `show' to solve blobs from patch mails
122 'add-coderepo' => [ 'PATHNAME', 'add or set priority of a git code repo',
124 'ls-coderepo' => [ '[FILTER_TERMS...]',
125 'list known code repos', qw(format|f=s z) ],
126 'forget-coderepo' => [ 'PATHNAME',
127 'stop using repo to solve blobs from patches',
130 'add-watch' => [ '[URL_OR_PATHNAME]',
131 'watch for new messages and flag changes',
132 qw(import! flags! interval=s recursive|r exclude=s include=s) ],
133 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
135 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
136 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote) ],
137 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
140 'import' => [ '{URL_OR_PATHNAME|--stdin}',
141 'one-shot import/update from URL or filesystem',
142 qw(stdin| offset=i recursive|r exclude=s include=s !flags),
145 'config' => [ '[...]', sub {
146 'git-config(1) wrapper for '._config_path($_[0]);
147 }, qw(config-file|system|global|file|f=s), # for conflict detection
148 pass_through('git config') ],
149 'init' => [ '[PATHNAME]', sub {
150 'initialize storage, default: '._store_path($_[0]);
152 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
153 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
154 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
155 'help' => [ '[SUBCOMMAND]', 'show help' ],
157 # XXX do we need this?
158 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
160 'reorder-local-store-and-break-history' => [ '[REFNAME]',
161 'rewrite git history in an attempt to improve compression',
164 # internal commands are prefixed with '_'
165 '_complete' => [ '[...]', 'internal shell completion helper',
166 pass_through('everything') ],
169 # switch descriptions, try to keep consistent across commands
170 # $spec: Getopt::Long option specification
171 # $spec => [@ALLOWED_VALUES (default is first), $description],
172 # $spec => $description
173 # "$SUB_COMMAND TAB $spec" => as above
174 my $stdin_formats = [ 'IN|auto|raw|mboxrd|mboxcl2|mboxcl|mboxo',
175 'specify message input format' ];
176 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
179 'help|h' => 'show this built-in help',
180 'quiet|q' => 'be quiet',
181 'solve!' => 'do not attempt to reconstruct blobs from emails',
182 'save-as=s' => ['NAME', 'save a search terms by given name'],
184 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
186 'dedupe|d=s' => ['STRAT|content|oid|mid|none',
187 'deduplication strategy'],
188 'show thread|t' => 'display entire thread a message belongs to',
190 'return all messages in the same thread as the actual match(es)',
191 'augment|a' => 'augment --output destination instead of clobbering',
193 'output|o=s' => [ 'DEST',
194 "destination (e.g. `/path/to/Maildir', or `-' for stdout)" ],
195 'mua-cmd|mua=s' => [ 'COMMAND',
196 "MUA to run on --output Maildir or mbox (e.g. `mutt -f %f'" ],
198 'show format|f=s' => [ 'OUT|plain|raw|html|mboxrd|mboxcl2|mboxcl',
199 'message/object output format' ],
200 'mark format|f=s' => $stdin_formats,
201 'forget format|f=s' => $stdin_formats,
202 'q format|f=s' => [ 'OUT|maildir|mboxrd|mboxcl2|mboxcl|html|oid|json',
203 'specify output format, default depends on --output'],
204 'ls-query format|f=s' => $ls_format,
205 'ls-external format|f=s' => $ls_format,
207 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
208 'offset=i' => ['OFF', 'search result offset (default: 0)'],
210 'sort|s=s' => [ 'VAL|received,relevance,docid',
211 "order of results `--output'-dependent"],
212 'reverse|r' => [ 'reverse search results' ], # like sort(1)
214 'boost=i' => 'increase/decrease priority of results (default: 0)',
216 'local' => 'limit operations to the local filesystem',
217 'local!' => 'exclude results from the local filesystem',
218 'remote' => 'limit operations to those requiring network access',
219 'remote!' => 'prevent operations requiring network access',
221 'mid=s' => 'specify the Message-ID of a message',
222 'oid=s' => 'specify the git object ID of a message',
224 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
225 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
226 'include=s' => 'include mailboxes/newsgroups based on pattern',
228 'exact' => 'operate on exact header matches only',
229 'exact!' => 'rely on content match instead of exact header matches',
231 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
232 'jobs:i' => 'set parallelism level',
234 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
235 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
237 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
241 'leistore.dir' => 'top-level storage location',
244 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
246 my ($self, $code) = @_;
247 # make sure client sees stdout before exit
248 $self->{1}->autoflush(1) if $self->{1};
249 dump_and_clear_log();
250 if (my $sock = $self->{sock}) {
251 send($sock, "x_it $code", MSG_EOR);
252 } elsif (!($code & 127)) { # oneshot, ignore signals
253 # don't want to end up using $? from child processes
254 for my $f (qw(lxs l2m)) {
255 my $wq = delete $self->{$f} or next;
262 sub puts ($;@) { print { shift->{1} } map { "$_\n" } @_ }
264 sub out ($;@) { print { shift->{1} } @_ }
268 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{IO};
269 print $err @_, (substr($_[-1], -1, 1) eq "\n" ? () : "\n");
272 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
275 my ($self, $buf, $exit_code) = @_;
277 x_it($self, ($exit_code // 1) << 8);
281 sub atfork_prepare_wq {
282 my ($self, $wq) = @_;
283 my $tcafc = $wq->{-ipc_atfork_child_close} //= [ $listener // () ];
284 if (my $sock = $self->{sock}) {
285 push @$tcafc, @$self{qw(0 1 2)}, $sock;
287 if (my $pgr = $self->{pgr}) {
288 push @$tcafc, @$pgr[1,2];
290 for my $f (qw(lxs l2m)) {
291 my $ipc = $self->{$f} or next;
292 push @$tcafc, grep { defined }
293 @$ipc{qw(-wq_s1 -wq_s2 -ipc_req -ipc_res)};
297 # usage: my %sig = $lei->atfork_child_wq($wq);
298 # local @SIG{keys %sig} = values %sig;
299 sub atfork_child_wq {
300 my ($self, $wq) = @_;
301 my ($sock, $l2m_wq_s1);
302 (@$self{qw(0 1 2)}, $sock, $l2m_wq_s1) = delete(@$wq{0..4});
303 $self->{sock} = $sock if -S $sock;
304 $self->{l2m}->{-wq_s1} = $l2m_wq_s1 if $l2m_wq_s1 && -S $l2m_wq_s1;
307 $quit = \&CORE::exit;
308 (__WARN__ => sub { err($self, @_) },
310 $self->x_it(13); # SIGPIPE = 13
311 # we need to close explicitly to avoid Perl warning on SIGPIPE
313 next unless $self->{$i} && (-p $self->{$i} || -S _);
314 close(delete $self->{$i});
316 # trigger the LeiXSearch $done OpPipe:
317 syswrite($self->{0}, '!') if $self->{0} && -p $self->{0};
318 $SIG{PIPE} = 'DEFAULT';
319 die bless(\"$_[0]", 'PublicInbox::SIGPIPE'),
323 # usage: ($lei, @io) = $lei->atfork_parent_wq($wq);
324 sub atfork_parent_wq {
325 my ($self, $wq) = @_;
326 my $env = delete $self->{env}; # env is inherited at fork
327 my $ret = bless { %$self }, ref($self);
328 if (my $dedupe = delete $ret->{dedupe}) {
329 $ret->{dedupe} = $wq->deep_clone($dedupe);
332 delete @$ret{qw(-lei_store cfg pgr lxs)}; # keep l2m
333 my @io = delete @$ret{0..2};
334 $io[3] = delete($ret->{sock}) // $io[2];
335 my $l2m = $ret->{l2m};
336 if ($l2m && $l2m != $wq) { # $wq == lxs
337 $io[4] = $l2m->{-wq_s1} if $l2m->{-wq_s1};
344 my ($self, $errmsg) = @_;
345 my $cmd = $self->{cmd} // 'COMMAND';
346 my @info = @{$CMD{$cmd} // [ '...', '...' ]};
347 my @top = ($cmd, shift(@info) // ());
348 my $cmd_desc = shift(@info);
349 $cmd_desc = $cmd_desc->($self->{env}) if ref($cmd_desc) eq 'CODE';
352 for my $sw (grep { !ref } @info) { # ("prio=s", "z", $GLP_PASS)
353 my $desc = $OPTDESC{"$cmd\t$sw"} // $OPTDESC{$sw} // next;
355 ($arg_vals, $desc) = @$desc if ref($desc) eq 'ARRAY';
357 # lower-case is a keyword (e.g. `content', `oid'),
358 # ALL_CAPS is a string description (e.g. `PATH')
359 if ($desc !~ /default/ && $arg_vals =~ /\b([a-z]+)[,\|]/) {
360 $desc .= "\ndefault: `$1'";
364 if ($x =~ s/!\z//) { # solve! => --no-solve
366 } elsif ($x =~ s/:.+//) { # optional args: $x = "mid:s"
367 @vals = (' [', undef, ']');
368 } elsif ($x =~ s/=.+//) { # required arg: $x = "type=s"
369 @vals = (' ', undef);
370 } # else: no args $x = 'thread|t'
371 for (split(/\|/, $x)) { # help|h
372 length($_) > 1 ? push(@l, "--$_") : push(@s, "-$_");
374 if (!scalar(@vals)) { # no args 'thread|t'
375 } elsif ($arg_vals =~ s/\A([A-Z_]+)\b//) { # "NAME"
378 $vals[1] = uc(substr($l[0], 2)); # "--type" => "TYPE"
380 if ($arg_vals =~ /([,\|])/) {
382 my @allow = split(/\Q$sep\E/, $arg_vals);
383 my $must = $sep eq '|' ? 'Must' : 'Can';
384 @allow = map { "`$_'" } @allow;
385 my $last = pop @allow;
386 $desc .= "\n$must be one of: " .
387 join(', ', @allow) . " or $last";
389 my $lhs = join(', ', @s, @l) . join('', @vals);
390 if ($x =~ /\|\z/) { # "stdin|" or "clear|"
391 $lhs =~ s/\A--/- , --/;
393 $lhs =~ s/\A--/ --/; # pad if no short options
395 $lpad = length($lhs) if length($lhs) > $lpad;
396 push @opt_desc, $lhs, $desc;
398 my $msg = $errmsg ? "E: $errmsg\n" : '';
405 local $Text::Wrap::columns = 78 - $lpad;
406 my $padding = ' ' x ($lpad + 2);
407 while (my ($lhs, $rhs) = splice(@opt_desc, 0, 2)) {
408 $msg .= ' '.pack("A$lpad", $lhs);
409 $rhs = wrap('', '', $rhs);
410 $rhs =~ s/\n/\n$padding/sg; # LHS pad continuation lines
414 print { $self->{$errmsg ? 2 : 1} } $msg;
415 x_it($self, $errmsg ? 1 << 8 : 0); # stderr => failure
420 my ($self, $cmd, $argv) = @_;
422 $OPT = $self->{opt} = {};
423 my $info = $CMD{$cmd} // [ '[...]' ];
424 my ($proto, undef, @spec) = @$info;
425 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
426 push @spec, qw(help|h);
428 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
429 $lone_dash = $spec[0];
430 $OPT->{$spec[0]} = \(my $var);
431 push @spec, '' => \$var;
433 $glp->getoptionsfromarray($argv, $OPT, @spec) or
434 return _help($self, "bad arguments or options for $cmd");
435 return _help($self) if $OPT->{help};
437 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
439 # "-" aliases "stdin" or "clear"
440 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
443 my $POS_ARG = '[A-Z][A-Z0-9_]+';
445 my @args = split(/ /, $proto);
446 for my $var (@args) {
447 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
448 $inf = defined($argv->[$i]) and last;
449 $var =~ s/\.\.\.\z//;
450 $err = "$var not supplied";
451 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
452 $argv->[$i++] // ($err = "$var not supplied");
453 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
456 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
458 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
459 my @or = split(/\|/, $var);
462 if ($o =~ /\A--([a-z0-9\-]+)/) {
463 $ok = defined($OPT->{$1});
465 } elsif (defined($argv->[$i])) {
469 } # else continue looping
472 $err = join(', ', @or) . " or $last must be set";
474 warn "BUG: can't parse `$var' in $proto";
478 if (!$inf && scalar(@$argv) > scalar(@args)) {
479 $err //= 'too many arguments';
481 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
485 my ($self, $cmd, @argv) = @_;
486 local $current_lei = $self; # for __WARN__
487 dump_and_clear_log("from previous run\n");
488 return _help($self, 'no command given') unless defined($cmd);
489 my $func = "lei_$cmd";
491 if (my $cb = __PACKAGE__->can($func)) {
492 optparse($self, $cmd, \@argv) or return;
494 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
496 $GLP->getoptionsfromarray([$cmd, @argv], $opt, qw(help|h)) or
497 return _help($self, 'bad arguments or options');
500 fail($self, "`$cmd' is not an lei command");
505 my ($self, $creat) = @_;
506 my $f = _config_path($self->{env});
508 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
509 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
510 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
517 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
518 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
519 open my $fh, '>>', $f or die "open($f): $!\n";
520 @st = stat($fh) or die "fstat($f): $!\n";
521 $cur_st = pack('dd', $st[10], $st[7]);
522 qerr($self, "I: $f created") if $self->{cmd} ne 'config';
524 my $cfg = PublicInbox::Config::git_config_dump($f);
525 $cfg->{-st} = $cur_st;
527 $self->{cfg} = $PATH2CFG{$f} = $cfg;
530 sub _lei_store ($;$) {
531 my ($self, $creat) = @_;
532 my $cfg = _lei_cfg($self, $creat);
533 $cfg->{-lei_store} //= do {
534 require PublicInbox::LeiStore;
535 my $dir = $cfg->{'leistore.dir'};
536 $dir //= _store_path($self->{env}) if $creat;
538 PublicInbox::LeiStore->new($dir, { creat => $creat });
543 my ($self, @argv) = @_;
547 my ($self, @argv) = @_;
551 my ($self, @argv) = @_;
552 $self->{opt}->{'config-file'} and return fail $self,
553 "config file switches not supported by `lei config'";
554 my $env = $self->{env};
555 delete local $env->{GIT_CONFIG};
556 my $cfg = _lei_cfg($self, 1);
557 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
558 my %rdr = map { $_ => $self->{$_} } (0..2);
559 run_die($cmd, $env, \%rdr);
563 my ($self, $dir) = @_;
564 my $cfg = _lei_cfg($self, 1);
565 my $cur = $cfg->{'leistore.dir'};
566 my $env = $self->{env};
567 $dir //= _store_path($env);
568 $dir = File::Spec->rel2abs($dir, $env->{PWD}); # PWD is symlink-aware
569 my @cur = stat($cur) if defined($cur);
570 $cur = File::Spec->canonpath($cur // $dir);
571 my @dir = stat($dir);
572 my $exists = "I: leistore.dir=$cur already initialized" if @dir;
575 _lei_store($self, 1)->done;
576 return qerr($self, $exists);
579 # some folks like symlinks and bind mounts :P
580 if (@dir && "$cur[0] $cur[1]" eq "$dir[0] $dir[1]") {
581 lei_config($self, 'leistore.dir', $dir);
582 _lei_store($self, 1)->done;
583 return qerr($self, "$exists (as $cur)");
585 return fail($self, <<"");
586 E: leistore.dir=$cur already initialized and it is not $dir
589 lei_config($self, 'leistore.dir', $dir);
590 _lei_store($self, 1)->done;
591 $exists //= "I: leistore.dir=$dir newly initialized";
592 return qerr($self, $exists);
595 sub lei_daemon_pid { puts shift, $$ }
597 sub lei_daemon_kill {
599 my $sig = $self->{opt}->{signal} // 'TERM';
600 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
603 sub lei_help { _help($_[0]) }
605 # Shell completion helper. Used by lei-completion.bash and hopefully
606 # other shells. Try to do as much here as possible to avoid redundancy
607 # and improve maintainability.
609 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
610 shift @argv; # ignore "lei", the entire command is sent
611 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h);
612 my $cmd = shift @argv;
613 my $info = $CMD{$cmd} // do { # filter matching commands
614 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
617 my ($proto, undef, @spec) = @$info;
619 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
620 if (substr($cur // '-', 0, 1) eq '-') { # --switches
621 # gross special case since the only git-config options
622 # Consider moving to a table if we need more special cases
623 # we use Getopt::Long for are the ones we reject, so these
624 # are the ones we don't reject:
625 if ($cmd eq 'config') {
626 puts $self, grep(/$re/, keys %CONFIG_KEYS);
627 @spec = qw(add z|null get get-all unset unset-all
628 replace-all get-urlmatch
629 remove-section rename-section
630 name-only list|l edit|e
631 get-color-name get-colorbool);
635 puts $self, grep(/$re/, map { # generate short/long names
637 if (s/=.+\z//) { # required arg, e.g. output|o=i
639 } elsif (s/:.+\z//) { # optional arg, e.g. mid:s
640 } else { # negation: solve! => no-solve|solve
641 s/\A(.+)!\z/no-$1|$1/;
644 length > 1 ? "--$_$eq" : "-$_"
645 } split(/\|/, $_, -1) # help|h
646 } grep { $OPTDESC{"$cmd\t$_"} || $OPTDESC{$_} } @spec);
647 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
648 puts $self, grep(/$re/, keys %CONFIG_KEYS);
650 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
654 sub reap_exec { # dwaitpid callback
655 my ($self, $pid) = @_;
659 sub lei_git { # support passing through random git commands
660 my ($self, @argv) = @_;
661 my %rdr = map { $_ => $self->{$_} } (0..2);
662 my $pid = spawn(['git', @argv], $self->{env}, \%rdr);
663 dwaitpid($pid, \&reap_exec, $self);
667 my ($argv, $env) = @_;
668 my $argc = scalar @$argv;
669 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
670 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
675 my ($self, $sock) = @_;
676 my $mua = $self->{opt}->{'mua-cmd'} // return;
677 my $mfolder = $self->{ovv}->{dst};
678 require Text::ParseWords;
680 my @cmd = Text::ParseWords::shellwords($mua);
681 # mutt uses '%f' for open-hook with compressed folders, so we use %f
682 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
683 push @cmd, $mfolder unless defined($replaced);
684 $sock //= $self->{sock};
685 if ($sock) { # lei(1) client process runs it
686 send($sock, exec_buf(\@cmd, {}), MSG_EOR);
688 $self->{"mua.pid.$self.$$"} = spawn(\@cmd);
692 # caller needs to "-t $self->{1}" to check if tty
695 my $env = $self->{env};
696 my $fh = popen_rd([qw(git var GIT_PAGER)], $env);
697 chomp(my $pager = <$fh> // '');
698 close($fh) or warn "`git var PAGER' error: \$?=$?";
699 return if $pager eq 'cat' || $pager eq '';
701 my $new_env = { LESS => 'FRX', LV => '-c', COLUMNS => 80 };
702 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
703 pipe(my ($r, $wpager)) or return warn "pipe: $!";
704 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
705 my $pgr = [ undef, @$rdr{1, 2}, $$ ];
706 if (my $sock = $self->{sock}) { # lei(1) process runs it
707 delete @$new_env{keys %$env}; # only set iff unset
708 my $fds = [ map { fileno($_) } @$rdr{0..2} ];
709 $send_cmd->($sock, $fds, exec_buf([$pager], $new_env), MSG_EOR);
711 $pgr->[0] = spawn([$pager], $new_env, $rdr);
713 $self->{1} = $wpager;
714 $self->{2} = $wpager if -t $self->{2};
715 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
721 my $pgr = delete($self->{pgr}) or return;
722 $self->{2} = $pgr->[2];
723 # do not restore original stdout, just close it so we error out
724 close(delete($self->{1})) if $self->{1};
726 dwaitpid($pid, undef, $self->{sock}) if $pid && $pgr->[3] == $$;
729 sub accept_dispatch { # Listener {post_accept} callback
730 my ($sock) = @_; # ignore other
732 my $self = bless { sock => $sock }, __PACKAGE__;
733 vec(my $rvec = '', fileno($sock), 1) = 1;
734 select($rvec, undef, undef, 1) or
735 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
736 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33); # >MAX_ARG_STRLEN
737 if (scalar(@fds) == 4) {
739 for my $rdr (qw(<&= >&= >&= <&=)) {
740 my $fd = shift(@fds);
741 open($self->{$i++}, $rdr, $fd) and next;
742 send($sock, "open($rdr$fd) (FD=$i): $!", MSG_EOR);
745 return send($sock, "recv_cmd failed: $!", MSG_EOR);
747 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
748 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
749 # $buf = "$$\0$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
750 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
751 return send($sock, 'request command truncated', MSG_EOR);
752 my ($argc, @argv) = split(/\0/, $buf, -1);
754 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
755 if (chdir(delete($self->{3}))) {
757 $self->{env} = \%env;
758 eval { dispatch($self, @argv) };
759 send($sock, $@, MSG_EOR) if $@;
761 send($sock, "fchdir: $!", MSG_EOR); # implicit close
767 for my $f (qw(lxs l2m)) {
768 my $wq = delete $self->{$f} or next;
771 } elsif ($wq->wq_kill_old) {
775 close(delete $self->{1}) if $self->{1}; # may reap_compress
776 $self->close if $self->{sock}; # PublicInbox::DS::close
779 # for long-running results
782 local %ENV = %{$self->{env}};
783 my $sock = $self->{sock};
784 local $current_lei = $self;
786 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
787 if (scalar(@fds) == 1 && !defined($fds[0])) {
788 return if $! == EAGAIN;
790 last if $! == ECONNRESET;
794 open my $rfh, '+<&=', $fd;
796 die "unrecognized client signal: $buf";
801 eval { $self->fail($err) };
806 sub event_step_init {
808 if (my $sock = $self->{sock}) { # using DS->EventLoop
810 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
816 our $oldset; sub oldset { $oldset }
818 sub dump_and_clear_log {
819 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
821 unshift(@pfx, "$errors_log ") if @pfx;
822 warn @pfx, do { local $/; <STDIN> };
823 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
827 # lei(1) calls this when it can't connect
829 my ($path, $errno, $narg) = @_;
830 if ($errno == ECONNREFUSED) {
831 unlink($path) or die "unlink($path): $!";
832 } elsif ($errno != ENOENT) {
833 $! = $errno; # allow interpolation to stringify in die
834 die "connect($path): $!";
836 umask(077) // die("umask(077): $!");
838 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
839 bind($listener, pack_sockaddr_un($path)) or die "bind($path): $!";
840 listen($listener, 1024) or die "listen: $!";
841 my @st = stat($path) or die "stat($path): $!";
842 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
843 local $oldset = PublicInbox::DS::block_signals();
845 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
846 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
847 require PublicInbox::CmdIPC4;
848 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
849 PublicInbox::CmdIPC4->can('recv_cmd4');
852 $recv_cmd or die <<"";
853 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
855 require PublicInbox::Listener;
856 require PublicInbox::EOFpipe;
857 (-p STDOUT) or die "E: stdout must be a pipe\n";
859 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
860 $errors_log .= 'errors.log';
861 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
863 dump_and_clear_log("from previous daemon process:\n");
864 POSIX::setsid() > 0 or die "setsid: $!";
865 my $pid = fork // die "fork: $!";
867 $0 = "lei-daemon $path";
869 $listener->blocking(0);
871 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
873 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
874 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
876 $exit_code //= shift;
877 my $lis = $pil or exit($exit_code);
878 # closing eof_w triggers \&noop wakeup
879 $listener = $eof_w = $pil = $path = undef;
880 $lis->close; # DS::close
881 PublicInbox::DS->SetLoopTimeout(1000);
885 CHLD => \&PublicInbox::DS::enqueue_reap,
893 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
894 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
896 local $SIG{PIPE} = 'IGNORE';
897 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
899 PublicInbox::DS->SetLoopTimeout(5000);
901 # wake up every second to accept signals if we don't
902 # have signalfd or IO::KQueue:
903 PublicInbox::DS::sig_setmask($oldset);
904 PublicInbox::DS->SetLoopTimeout(1000);
906 PublicInbox::DS->SetPostLoopCallback(sub {
907 my ($dmap, undef) = @_;
908 if (@st = defined($path) ? stat($path) : ()) {
909 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
910 warn "$path dev/ino changed, quitting\n";
913 } elsif (defined($path)) {
914 warn "stat($path): $!, quitting ...\n";
915 undef $path; # don't unlink
918 return 1 if defined($path);
921 for my $s (values %$dmap) {
922 $s->can('busy') or next;
923 if ($s->busy($now)) {
929 $n; # true: continue, false: stop
932 # STDIN was redirected to /dev/null above, closing STDERR and
933 # STDOUT will cause the calling `lei' client process to finish
934 # reading the <$daemon> pipe.
935 openlog($path, 'pid', 'user');
936 local $SIG{__WARN__} = sub {
937 $current_lei ? err($current_lei, @_) : syslog('warning', "@_");
939 my $on_destroy = PublicInbox::OnDestroy->new($$, sub {
940 syslog('crit', "$@") if $@;
942 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
943 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
944 # $daemon pipe to `lei' closed, main loop begins:
945 PublicInbox::DS->EventLoop;
946 @$on_destroy = (); # cancel on_destroy if we get here
947 exit($exit_code // 0);
950 # for users w/o Socket::Msghdr
953 my $exit = $main_pkg->can('exit'); # caller may override exit()
954 local $quit = $exit if $exit;
956 umask(077) // die("umask(077): $!");
962 }, __PACKAGE__), @ARGV);
965 # ensures stdout hits the FS before sock disconnects so a client
966 # can immediately reread it
969 $self->{1}->autoflush(1) if $self->{1};
971 if (my $mua_pid = delete $self->{"mua.pid.$self.$$"}) {
972 waitpid($mua_pid, 0);