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(EPIPE EAGAIN EINTR ECONNREFUSED ENOENT ECONNRESET);
17 use POSIX qw(strftime);
19 use Fcntl qw(SEEK_SET);
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 popen_rd);
25 use PublicInbox::Lock;
26 use Time::HiRes qw(stat); # ctime comparisons for config cache
27 use File::Path qw(mkpath);
29 our $quit = \&CORE::exit;
30 our ($current_lei, $errors_log, $listener, $oldset);
31 my ($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 return $p if index($p, '/') == 0; # already absolute
70 my $pwd = $self->{env}->{PWD};
72 my $cwd = $self->{3} // getcwd() // die "getcwd(PWD=$pwd): $!";
73 if (my @st_pwd = stat($pwd)) {
74 my @st_cwd = stat($cwd) or die "stat($cwd): $!";
75 "@st_pwd[1,0]" eq "@st_cwd[1,0]" or
76 $self->{env}->{PWD} = $pwd = $cwd;
77 } else { # PWD was invalid
78 delete $self->{env}->{PWD};
82 $pwd //= $self->{env}->{PWD} = getcwd() // die "getcwd(PWD=$pwd): $!";
83 File::Spec->rel2abs($p, $pwd);
88 rel2abs($self, ($self->{env}->{XDG_DATA_HOME} //
89 ($self->{env}->{HOME} // '/nonexistent').'/.local/share')
93 sub _config_path ($) {
95 rel2abs($self, ($self->{env}->{XDG_CONFIG_HOME} //
96 ($self->{env}->{HOME} // '/nonexistent').'/.config')
102 rel2abs($self, ($self->{env}->{XDG_CACHE_HOME} //
103 ($self->{env}->{HOME} // '/nonexistent').'/.cache')
109 $self->{ale} //= do {
110 require PublicInbox::LeiALE;
111 $self->_lei_cfg(1)->{ale} //= PublicInbox::LeiALE->new($self);
116 # TODO: drop underscore variants everywhere, they're undocumented
117 qw(fsync|sync! jobs|j=i indexlevel|L=s compact
118 max_size|max-size=s sequential_shard|sequential-shard
119 batch_size|batch-size=s skip-docdata)
122 my @c_opt = qw(c=s@ C=s@ quiet|q);
123 my @lxs_opt = (qw(remote! local! external! include|I=s@ exclude=s@ only=s@
124 import-remote! no-torsocks torsocks=s),
125 PublicInbox::LeiQuery::curl_opt());
127 # we generate shell completion + help using %CMD and %OPTDESC,
128 # see lei__complete() and PublicInbox::LeiHelp
129 # command => [ positional_args, 1-line description, Getopt::Long option spec ]
130 our %CMD = ( # sorted in order of importance/use:
131 'q' => [ '--stdin|SEARCH_TERMS...', 'search for messages matching terms',
132 'stdin|', # /|\z/ must be first for lone dash
134 qw(save-as=s output|mfolder|o=s format|f=s dedupe|d=s threads|t+
135 sort|s=s reverse|r offset=i pretty jobs|j=s globoff|g augment|a
136 import-before! lock=s@ rsyncable alert=s@ mua=s verbose|v+), @c_opt,
137 opt_dash('limit|n=i', '[0-9]+') ],
139 'blob' => [ 'OID', 'display a git blob object, solving if necessary',
140 qw(git-dir=s@ cwd! verbose|v+ oid-a|A=s path-a|a=s path-b|b=s),
143 'add-external' => [ 'LOCATION',
144 'add/set priority of a publicinbox|extindex for extra matches',
145 qw(boost=i mirror=s no-torsocks torsocks=s inbox-version=i
146 verbose|v+), @c_opt, index_opt(),
147 PublicInbox::LeiQuery::curl_opt() ],
148 'ls-external' => [ '[FILTER]', 'list publicinbox|extindex locations',
149 qw(format|f=s z|0 globoff|g invert-match|v local remote), @c_opt ],
150 'ls-label' => [ '', 'list labels', qw(z|0 stats:s), @c_opt ],
151 'forget-external' => [ 'LOCATION...|--prune',
152 'exclude further results from a publicinbox|extindex',
155 'ls-query' => [ '[FILTER...]', 'list saved search queries',
156 qw(name-only format|f=s), @c_opt ],
157 'rm-query' => [ 'QUERY_NAME', 'remove a saved search', @c_opt ],
158 'mv-query' => [ qw(OLD_NAME NEW_NAME), 'rename a saved search', @c_opt ],
160 'plonk' => [ '--threads|--from=IDENT',
161 'exclude mail matching From: or threads from non-Message-ID searches',
162 qw(stdin| threads|t from|f=s mid=s oid=s), @c_opt ],
163 'mark' => [ 'KEYWORDS...',
164 'set/unset keywords on message(s)',
165 qw(stdin| in-format|F=s input|i=s@ oid=s@ mid=s@), @c_opt,
166 pass_through('-kw:foo for delete') ],
167 'forget' => [ '[--stdin|--oid=OID|--by-mid=MID]',
168 "exclude message(s) on stdin from `q' search results",
169 qw(stdin| oid=s exact by-mid|mid:s), @c_opt ],
171 'purge-mailsource' => [ 'LOCATION|--all',
172 'remove imported messages from IMAP, Maildirs, and MH',
173 qw(exact! all jobs:i indexed), @c_opt ],
175 # code repos are used for `show' to solve blobs from patch mails
176 'add-coderepo' => [ 'DIRNAME', 'add or set priority of a git code repo',
177 qw(boost=i), @c_opt ],
178 'ls-coderepo' => [ '[FILTER_TERMS...]',
179 'list known code repos', qw(format|f=s z), @c_opt ],
180 'forget-coderepo' => [ 'DIRNAME',
181 'stop using repo to solve blobs from patches',
184 'add-watch' => [ 'LOCATION', 'watch for new messages and flag changes',
185 qw(import! kw|keywords|flags! interval=s recursive|r
186 exclude=s include=s), @c_opt ],
187 'ls-watch' => [ '[FILTER...]', 'list active watches with numbers and status',
188 qw(format|f=s z), @c_opt ],
189 'pause-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
190 'resume-watch' => [ '[WATCH_NUMBER_OR_FILTER]', qw(all local remote), @c_opt ],
191 'forget-watch' => [ '{WATCH_NUMBER|--prune}', 'stop and forget a watch',
194 'import' => [ 'LOCATION...|--stdin',
195 'one-time import/update from URL or filesystem',
196 qw(stdin| offset=i recursive|r exclude=s include|I=s
197 lock=s@ in-format|F=s kw|keywords|flags! verbose|v+), @c_opt ],
198 'convert' => [ 'LOCATION...|--stdin',
199 'one-time conversion from URL or filesystem to another format',
200 qw(stdin| in-format|F=s out-format|f=s output|mfolder|o=s
201 lock=s@ kw|keywords|flags!), @c_opt ],
202 'p2q' => [ 'FILE|COMMIT_OID|--stdin',
203 "use a patch to generate a query for `lei q --stdin'",
204 qw(stdin| want|w=s@ uri debug), @c_opt ],
205 'config' => [ '[...]', sub {
206 'git-config(1) wrapper for '._config_path($_[0]);
207 }, qw(config-file|system|global|file|f=s), # for conflict detection
208 qw(c=s@ C=s@), pass_through('git config') ],
209 'init' => [ '[DIRNAME]', sub {
210 "initialize storage, default: ".store_path($_[0]);
212 'daemon-kill' => [ '[-SIGNAL]', 'signal the lei-daemon',
213 # "-C DIR" conflicts with -CHLD, here, and chdir makes no sense, here
214 opt_dash('signal|s=s', '[0-9]+|(?:[A-Z][A-Z0-9]+)') ],
215 'daemon-pid' => [ '', 'show the PID of the lei-daemon' ],
216 'help' => [ '[SUBCOMMAND]', 'show help' ],
218 # XXX do we need this?
219 # 'git' => [ '[ANYTHING...]', 'git(1) wrapper', pass_through('git') ],
221 'reorder-local-store-and-break-history' => [ '[REFNAME]',
222 'rewrite git history in an attempt to improve compression',
225 # internal commands are prefixed with '_'
226 '_complete' => [ '[...]', 'internal shell completion helper',
227 pass_through('everything') ],
230 # switch descriptions, try to keep consistent across commands
231 # $spec: Getopt::Long option specification
232 # $spec => [@ALLOWED_VALUES (default is first), $description],
233 # $spec => $description
234 # "$SUB_COMMAND TAB $spec" => as above
235 my $stdin_formats = [ 'MAIL_FORMAT|eml|mboxrd|mboxcl2|mboxcl|mboxo',
236 'specify message input format' ];
237 my $ls_format = [ 'OUT|plain|json|null', 'listing output format' ];
239 # we use \x{a0} (non-breaking SP) to avoid wrapping in PublicInbox::LeiHelp
241 'help|h' => 'show this built-in help',
242 'c=s@' => [ 'NAME=VALUE', 'set config option' ],
243 'C=s@' => [ 'DIR', 'chdir to specify to directory' ],
244 'quiet|q' => 'be quiet',
245 'lock=s@' => [ 'METHOD|dotlock|fcntl|flock|none',
246 'mbox(5) locking method(s) to use (default: fcntl,dotlock)' ],
248 'globoff|g' => "do not match locations using '*?' wildcards ".
249 "and\xa0'[]'\x{a0}ranges",
250 'verbose|v+' => 'be more verbose',
251 'external!' => 'do not use externals',
252 'solve!' => 'do not attempt to reconstruct blobs from emails',
253 'torsocks=s' => ['VAL|auto|no|yes',
254 'whether or not to wrap git and curl commands with torsocks'],
255 'no-torsocks' => 'alias for --torsocks=no',
256 'save-as=s' => ['NAME', 'save a search terms by given name'],
257 'import-remote!' => 'do not memoize remote messages into local store',
259 'type=s' => [ 'any|mid|git', 'disambiguate type' ],
261 'dedupe|d=s' => ['STRATEGY|content|oid|mid|none',
262 'deduplication strategy'],
264 'return all messages in the same threads as the actual match(es)',
266 'want|w=s@' => [ 'PREFIX|dfpost|dfn', # common ones in help...
267 'search prefixes to extract (default: dfpost7)' ],
269 'alert=s@' => ['CMD,:WINCH,:bell,<any command>',
270 'run command(s) or perform ops when done writing to output ' .
271 '(default: ":WINCH,:bell" with --mua and Maildir/IMAP output, ' .
272 'nothing otherwise)' ],
274 'augment|a' => 'augment --output destination instead of clobbering',
276 'output|mfolder|o=s' => [ 'MFOLDER',
277 "destination (e.g.\xa0`/path/to/Maildir', ".
278 "or\xa0`-'\x{a0}for\x{a0}stdout)" ],
280 "MUA to run on --output Maildir or mbox (e.g.\xa0`mutt\xa0-f\xa0%f')" ],
282 'inbox-version=i' => [ 'NUM|1|2',
283 'force a public-inbox version with --mirror'],
284 'mirror=s' => [ 'URL', 'mirror a public-inbox'],
286 # public-inbox-index options
287 'fsync!' => 'speed up indexing after --mirror, risk index corruption',
288 'compact' => 'run compact index after mirroring',
289 'indexlevel|L=s' => [ 'LEVEL|full|medium|basic',
290 "indexlevel with --mirror (default: full)" ],
291 'max_size|max-size=s' => [ 'SIZE',
292 'do not index messages larger than SIZE (default: infinity)' ],
293 'batch_size|batch-size=s' => [ 'SIZE',
294 'flush changes to OS after given number of bytes (default: 1m)' ],
295 'sequential_shard|sequential-shard' =>
296 'index Xapian shards sequentially for slow storage',
298 'drop compatibility w/ public-inbox <1.6 to save ~1.5% space',
301 'OUT|maildir|mboxrd|mboxcl2|mboxcl|mboxo|html|json|jsonl|concatjson',
302 'specify output format, default depends on --output'],
303 'exclude=s@ q' => [ 'LOCATION',
304 'exclude specified external(s) from search' ],
305 'include|I=s@ q' => [ 'LOCATION',
306 'include specified external(s) in search' ],
307 'only=s@ q' => [ 'LOCATION',
308 'only use specified external(s) for search' ],
309 'jobs=s q' => [ '[SEARCH_JOBS][,WRITER_JOBS]',
310 'control number of search and writer jobs' ],
311 'jobs|j=i add-external' => 'set parallelism when indexing after --mirror',
313 'in-format|F=s' => $stdin_formats,
314 'format|f=s ls-query' => $ls_format,
315 'format|f=s ls-external' => $ls_format,
317 'limit|n=i@' => ['NUM', 'limit on number of matches (default: 10000)' ],
318 'offset=i' => ['OFF', 'search result offset (default: 0)'],
320 'sort|s=s' => [ 'VAL|received|relevance|docid',
321 "order of results is `--output'-dependent"],
322 'reverse|r' => 'reverse search results', # like sort(1)
324 'boost=i' => 'increase/decrease priority of results (default: 0)',
326 'local' => 'limit operations to the local filesystem',
327 'local!' => 'exclude results from the local filesystem',
328 'remote' => 'limit operations to those requiring network access',
329 'remote!' => 'prevent operations requiring network access',
331 'mid=s' => 'specify the Message-ID of a message',
332 'oid=s' => 'specify the git object ID of a message',
334 'recursive|r' => 'scan directories/mailboxes/newsgroups recursively',
335 'exclude=s' => 'exclude mailboxes/newsgroups based on pattern',
336 'include=s' => 'include mailboxes/newsgroups based on pattern',
338 'exact' => 'operate on exact header matches only',
339 'exact!' => 'rely on content match instead of exact header matches',
341 'by-mid|mid:s' => [ 'MID', 'match only by Message-ID, ignoring contents' ],
343 'kw|keywords|flags!' => 'disable/enable importing flags',
345 # xargs, env, use "-0", git(1) uses "-z". We support z|0 everywhere
346 'z|0' => 'use NUL \\0 instead of newline (CR) to delimit lines',
348 'signal|s=s' => [ 'SIG', 'signal to send lei-daemon (default: TERM)' ],
352 'leistore.dir' => 'top-level storage location',
355 my @WQ_KEYS = qw(lxs l2m imp mrr cnv p2q mark sol); # internal workers
357 # pronounced "exit": x_it(1 << 8) => exit(1); x_it(13) => SIGPIPE
359 my ($self, $code) = @_;
360 # make sure client sees stdout before exit
361 $self->{1}->autoflush(1) if $self->{1};
362 dump_and_clear_log();
363 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
364 send($s, "x_it $code", MSG_EOR);
365 } elsif ($self->{oneshot}) {
366 # don't want to end up using $? from child processes
367 for my $f (@WQ_KEYS) {
368 my $wq = delete $self->{$f} or next;
371 # cleanup anything that has tempfiles or open file handles
373 delete @$self{qw(ovv dedupe sto cfg)};
374 if (my $signum = ($code & 127)) { # usually SIGPIPE (13)
375 $SIG{PIPE} = 'DEFAULT'; # $SIG{$signum} doesn't work
377 sleep(1) while 1; # wait for signal
381 } # else ignore if client disconnected
386 my $err = $self->{2} // ($self->{pgr} // [])->[2] // *STDERR{GLOB};
387 my @eor = (substr($_[-1]//'', -1, 1) eq "\n" ? () : ("\n"));
388 print $err @_, @eor and return;
389 my $old_err = delete $self->{2};
390 close($old_err) if $! == EPIPE && $old_err;
391 $err = $self->{2} = ($self->{pgr} // [])->[2] // *STDERR{GLOB};
392 print $err @_, @eor or print STDERR @_, @eor;
395 sub qerr ($;@) { $_[0]->{opt}->{quiet} or err(shift, @_) }
397 sub fail_handler ($;$$) {
398 my ($lei, $code, $io) = @_;
399 for my $f (@WQ_KEYS) {
400 my $wq = delete $lei->{$f} or next;
401 $wq->wq_wait_old(undef, $lei) if $wq->wq_kill_old; # lei-daemon
403 close($io) if $io; # needed to avoid warnings on SIGPIPE
404 x_it($lei, $code // (1 << 8));
407 sub sigpipe_handler { # handles SIGPIPE from @WQ_KEYS workers
408 fail_handler($_[0], 13, delete $_[0]->{1});
411 # PublicInbox::OnDestroy callback for SIGINT to take out the entire pgid
414 dwaitpid($pgid) if kill('-INT', $pgid);
418 my ($self, $buf, $exit_code) = @_;
419 err($self, $buf) if defined $buf;
420 # calls fail_handler:
421 send($self->{pkt_op_p}, '!', MSG_EOR) if $self->{pkt_op_p};
422 x_it($self, ($exit_code // 1) << 8);
428 return if print { $self->{1} // return } @_; # likely
429 return note_sigpipe($self, 1) if $! == EPIPE;
430 my $err = "error writing to output: $!";
435 sub puts ($;@) { out(shift, map { "$_\n" } @_) }
437 sub child_error { # passes non-fatal curl exit codes to user
438 my ($self, $child_error, $msg) = @_; # child_error is $?
439 $self->err($msg) if $msg;
440 if (my $s = $self->{pkt_op_p} // $self->{sock}) {
441 # send to the parent lei-daemon or to lei(1) client
442 send($s, "child_error $child_error", MSG_EOR);
443 } elsif (!$PublicInbox::DS::in_loop) {
444 $self->{child_error} = $child_error;
445 } # else noop if client disconnected
448 sub note_sigpipe { # triggers sigpipe_handler
449 my ($self, $fd) = @_;
450 close(delete($self->{$fd})); # explicit close silences Perl warning
451 send($self->{pkt_op_p}, '|', MSG_EOR) if $self->{pkt_op_p};
455 sub _lei_atfork_child {
456 my ($self, $persist) = @_;
457 # we need to explicitly close things which are on stack
459 chdir '/' or die "chdir(/): $!";
460 my @io = delete @$self{qw(0 1 2 sock)};
461 unless ($self->{oneshot}) {
464 if (my $cfg = $self->{cfg}) {
465 delete $cfg->{-lei_store};
467 } else { # worker, Net::NNTP (Net::Cmd) uses STDERR directly
468 open STDERR, '+>&='.fileno($self->{2}) or warn "open $!";
470 for (delete @$self{qw(3 old_1 au_done)}) {
471 close($_) if defined($_);
473 if (my $op_c = delete $self->{pkt_op_c}) {
474 close(delete $op_c->{sock});
476 if (my $pgr = delete $self->{pgr}) {
477 close($_) for (@$pgr[1,2]);
479 close $listener if $listener;
483 $quit = \&CORE::exit;
484 $current_lei = $persist ? undef : $self; # for SIG{__WARN__}
487 sub _delete_pkt_op { # OnDestroy callback to prevent leaks on die
489 if (my $op = delete $self->{pkt_op_c}) { # in case of die
490 $op->close; # PublicInbox::PktOp::close
492 my $unclosed_after_die = delete($self->{pkt_op_p}) or return;
493 close $unclosed_after_die;
497 my ($self, $ops) = @_;
498 require PublicInbox::OnDestroy;
499 require PublicInbox::PktOp;
500 my $end = PublicInbox::OnDestroy->new($$, \&_delete_pkt_op, $self);
501 @$self{qw(pkt_op_c pkt_op_p)} = PublicInbox::PktOp->pair($ops);
506 my ($lei, $wq, $ident, $jobs, $ops) = @_;
508 '!' => [ \&fail_handler, $lei ],
509 '|' => [ \&sigpipe_handler, $lei ],
510 'x_it' => [ \&x_it, $lei ],
511 'child_error' => [ \&child_error, $lei ],
514 $ops->{''} //= [ \&dclose, $lei ];
515 my $end = $lei->pkt_op_pair($ops);
516 $wq->wq_workers_start($ident, $jobs, $lei->oldset, { lei => $lei });
517 delete $lei->{pkt_op_p};
518 my $op = delete $lei->{pkt_op_c};
520 $lei->event_step_init;
521 # oneshot needs $op, daemon-mode uses DS->EventLoop to handle $op
522 $lei->{oneshot} ? $op : undef;
526 require PublicInbox::LeiHelp;
527 PublicInbox::LeiHelp::call($_[0], $_[1], \%CMD, \%OPTDESC);
531 my ($self, $cmd, $argv) = @_;
532 # allow _complete --help to complete, not show help
533 return 1 if substr($cmd, 0, 1) eq '_';
535 $OPT = $self->{opt} //= {};
536 my $info = $CMD{$cmd} // [ '[...]' ];
537 my ($proto, undef, @spec) = @$info;
538 my $glp = ref($spec[-1]) eq ref($GLP) ? pop(@spec) : $GLP;
539 push @spec, qw(help|h);
541 if ($spec[0] =~ s/\|\z//s) { # "stdin|" or "clear|" allows "-" alias
542 $lone_dash = $spec[0];
543 $OPT->{$spec[0]} = \(my $var);
544 push @spec, '' => \$var;
546 $glp->getoptionsfromarray($argv, $OPT, @spec) or
547 return _help($self, "bad arguments or options for $cmd");
548 return _help($self) if $OPT->{help};
550 push @$argv, @{$OPT->{-argv}} if defined($OPT->{-argv});
552 # "-" aliases "stdin" or "clear"
553 $OPT->{$lone_dash} = ${$OPT->{$lone_dash}} if defined $lone_dash;
556 my $POS_ARG = '[A-Z][A-Z0-9_]+';
558 my @args = split(/ /, $proto);
559 for my $var (@args) {
560 if ($var =~ /\A$POS_ARG\.\.\.\z/o) { # >= 1 args;
561 $inf = defined($argv->[$i]) and last;
562 $var =~ s/\.\.\.\z//;
563 $err = "$var not supplied";
564 } elsif ($var =~ /\A$POS_ARG\z/o) { # required arg at $i
565 $argv->[$i++] // ($err = "$var not supplied");
566 } elsif ($var =~ /\.\.\.\]\z/) { # optional args start
569 } elsif ($var =~ /\A\[-?$POS_ARG\]\z/) { # one optional arg
571 } elsif ($var =~ /\A.+?\|/) { # required FOO|--stdin
572 $inf = 1 if index($var, '...') > 0;
573 my @or = split(/\|/, $var);
576 if ($o =~ /\A--([a-z0-9\-]+)/) {
577 $ok = defined($OPT->{$1});
579 } elsif (defined($argv->[$i])) {
583 } # else continue looping
587 $err = join(', ', @or) . " or $last must be set";
589 warn "BUG: can't parse `$var' in $proto";
593 if (!$inf && scalar(@$argv) > scalar(@args)) {
594 $err //= 'too many arguments';
596 $err ? fail($self, "usage: lei $cmd $proto\nE: $err") : 1;
599 sub _tmp_cfg { # for lei -c <name>=<value> ...
601 my $cfg = _lei_cfg($self, 1);
603 my $ft = File::Temp->new(TEMPLATE => 'lei_cfg-XXXX', TMPDIR => 1);
604 my $tmp = { '-f' => $ft->filename, -tmp => $ft };
606 print $ft <<EOM or return fail($self, "$tmp->{-f}: $!");
610 $tmp = $self->{cfg} = bless { %$cfg, %$tmp }, ref($cfg);
611 for (@{$self->{opt}->{c}}) {
612 /\A([^=\.]+\.[^=]+)(?:=(.*))?\z/ or return fail($self, <<EOM);
613 `-c $_' is not of the form -c <name>=<value>'
617 _config($self, '--add', $name, $value);
618 if (defined(my $v = $tmp->{$name})) {
619 if (ref($v) eq 'ARRAY') {
622 $tmp->{$name} = [ $v, $value ];
625 $tmp->{$name} = $value;
631 my ($self, $cmd, $pfx) = @_;
635 $cb = $self->can($pfx.$ucmd) and return $cb;
637 $base =~ s/_([a-z])/\u$1/g;
638 my $pkg = "PublicInbox::Lei\u$base";
639 ($INC{"PublicInbox/Lei\u$base.pm"} // eval("require $pkg")) ?
640 $pkg->can($pfx.$ucmd) : undef;
644 my ($self, $cmd, @argv) = @_;
645 local $current_lei = $self; # for __WARN__
646 dump_and_clear_log("from previous run\n");
647 return _help($self, 'no command given') unless defined($cmd);
648 # do not support Getopt bundling for this
649 while ($cmd eq '-C' || $cmd eq '-c') {
650 my $v = shift(@argv) // return fail($self, $cmd eq '-C' ?
651 '-C DIRECTORY' : '-c <name>=<value>');
652 push @{$self->{opt}->{substr($cmd, 1, 1)}}, $v;
653 $cmd = shift(@argv) // return _help($self, 'no command given');
655 if (my $cb = lazy_cb(__PACKAGE__, $cmd, 'lei_')) {
656 optparse($self, $cmd, \@argv) or return;
657 $self->{opt}->{c} and (_tmp_cfg($self) // return);
658 if (my $chdir = $self->{opt}->{C}) {
659 for my $d (@$chdir) {
660 next if $d eq ''; # same as git(1)
661 chdir $d or return fail($self, "cd $d: $!");
663 if (delete $self->{3}) { # update cwd for rel2abs
664 opendir my $dh, '.' or
665 return fail($self, "opendir . $!");
670 } elsif (grep(/\A-/, $cmd, @argv)) { # --help or -h only
671 $GLP->getoptionsfromarray([$cmd, @argv], {}, qw(help|h C=s@))
672 or return _help($self, 'bad arguments or options');
675 fail($self, "`$cmd' is not an lei command");
680 my ($self, $creat) = @_;
681 return $self->{cfg} if $self->{cfg};
682 my $f = _config_path($self);
684 my $cur_st = @st ? pack('dd', $st[10], $st[7]) : ''; # 10:ctime, 7:size
686 if (my $cfg = $PATH2CFG{$f}) { # reuse existing object in common case
687 return ($self->{cfg} = $cfg) if $cur_st eq $cfg->{-st};
688 ($sto, $sto_dir) = @$cfg{qw(-lei_store leistore.dir)};
693 return bless {}, 'PublicInbox::Config';
695 my (undef, $cfg_dir, undef) = File::Spec->splitpath($f);
696 -d $cfg_dir or mkpath($cfg_dir) or die "mkpath($cfg_dir): $!\n";
697 open my $fh, '>>', $f or die "open($f): $!\n";
698 @st = stat($fh) or die "fstat($f): $!\n";
699 $cur_st = pack('dd', $st[10], $st[7]);
700 qerr($self, "# $f created") if $self->{cmd} ne 'config';
702 my $cfg = PublicInbox::Config::git_config_dump($f);
703 bless $cfg, 'PublicInbox::Config';
704 $cfg->{-st} = $cur_st;
706 if ($sto && File::Spec->canonpath($sto_dir // store_path($self))
707 eq File::Spec->canonpath($cfg->{'leistore.dir'} //
708 store_path($self))) {
709 $cfg->{-lei_store} = $sto;
711 if (scalar(keys %PATH2CFG) > 5) {
712 # FIXME: use inotify/EVFILT_VNODE to detect unlinked configs
713 for my $k (keys %PATH2CFG) {
714 delete($PATH2CFG{$k}) unless -f $k
717 $self->{cfg} = $PATH2CFG{$f} = $cfg;
720 sub _lei_store ($;$) {
721 my ($self, $creat) = @_;
722 my $cfg = _lei_cfg($self, $creat);
723 $cfg->{-lei_store} //= do {
724 require PublicInbox::LeiStore;
725 my $dir = $cfg->{'leistore.dir'} // store_path($self);
726 return unless $creat || -d $dir;
727 PublicInbox::LeiStore->new($dir, { creat => $creat });
732 my ($self, @argv) = @_;
733 my %env = (%{$self->{env}}, GIT_CONFIG => undef);
734 my $cfg = _lei_cfg($self, 1);
735 my $cmd = [ qw(git config -f), $cfg->{'-f'}, @argv ];
736 my %rdr = map { $_ => $self->{$_} } (0..2);
737 waitpid(spawn($cmd, \%env, \%rdr), 0);
741 my ($self, @argv) = @_;
742 $self->{opt}->{'config-file'} and return fail $self,
743 "config file switches not supported by `lei config'";
745 x_it($self, $?) if $?;
749 my ($self, $dir) = @_;
750 my $cfg = _lei_cfg($self, 1);
751 my $cur = $cfg->{'leistore.dir'};
752 $dir //= store_path($self);
753 $dir = rel2abs($self, $dir);
754 my @cur = stat($cur) if defined($cur);
755 $cur = File::Spec->canonpath($cur // $dir);
756 my @dir = stat($dir);
757 my $exists = "# leistore.dir=$cur already initialized" if @dir;
760 _lei_store($self, 1)->done;
761 return qerr($self, $exists);
764 # some folks like symlinks and bind mounts :P
765 if (@dir && "@cur[1,0]" eq "@dir[1,0]") {
766 lei_config($self, 'leistore.dir', $dir);
767 _lei_store($self, 1)->done;
768 return qerr($self, "$exists (as $cur)");
770 return fail($self, <<"");
771 E: leistore.dir=$cur already initialized and it is not $dir
774 lei_config($self, 'leistore.dir', $dir);
775 _lei_store($self, 1)->done;
776 $exists //= "# leistore.dir=$dir newly initialized";
777 return qerr($self, $exists);
780 sub lei_daemon_pid { puts shift, $$ }
782 sub lei_daemon_kill {
784 my $sig = $self->{opt}->{signal} // 'TERM';
785 kill($sig, $$) or fail($self, "kill($sig, $$): $!");
788 # Shell completion helper. Used by lei-completion.bash and hopefully
789 # other shells. Try to do as much here as possible to avoid redundancy
790 # and improve maintainability.
792 my ($self, @argv) = @_; # argv = qw(lei and any other args...)
793 shift @argv; # ignore "lei", the entire command is sent
794 @argv or return puts $self, grep(!/^_/, keys %CMD), qw(--help -h -C);
795 my $cmd = shift @argv;
796 my $info = $CMD{$cmd} // do { # filter matching commands
797 @argv or puts $self, grep(/\A\Q$cmd\E/, keys %CMD);
800 my ($proto, undef, @spec) = @$info;
802 my $re = defined($cur) ? qr/\A\Q$cur\E/ : qr/./;
803 if (substr(my $_cur = $cur // '-', 0, 1) eq '-') { # --switches
804 # gross special case since the only git-config options
805 # Consider moving to a table if we need more special cases
806 # we use Getopt::Long for are the ones we reject, so these
807 # are the ones we don't reject:
808 if ($cmd eq 'config') {
809 puts $self, grep(/$re/, keys %CONFIG_KEYS);
810 @spec = qw(add z|null get get-all unset unset-all
811 replace-all get-urlmatch
812 remove-section rename-section
813 name-only list|l edit|e
814 get-color-name get-colorbool);
817 # generate short/long names from Getopt::Long specs
818 puts $self, grep(/$re/, qw(--help -h -C), map {
819 if (s/[:=].+\z//) { # req/optional args, e.g output|o=i
820 } elsif (s/\+\z//) { # verbose|v+
822 # negation: solve! => no-solve|solve
823 s/([\w\-]+)/$1|no-$1/g
826 my $x = length > 1 ? "--$_" : "-$_";
827 $x eq $_cur ? () : $x;
828 } grep(!/_/, split(/\|/, $_, -1)) # help|h
829 } grep { $OPTDESC{"$_\t$cmd"} || $OPTDESC{$_} } @spec);
830 } elsif ($cmd eq 'config' && !@argv && !$CONFIG_KEYS{$cur}) {
831 puts $self, grep(/$re/, keys %CONFIG_KEYS);
834 # switch args (e.g. lei q -f mbox<TAB>)
835 if (($argv[-1] // $cur // '') =~ /\A--?([\w\-]+)\z/) {
836 my $opt = quotemeta $1;
838 my $v = $OPTDESC{$_};
839 my @v = ref($v) ? split(/\|/, $v->[0]) : ();
840 # get rid of ALL CAPS placeholder (e.g "OUT")
841 # (TODO: completion for external paths)
842 shift(@v) if scalar(@v) && uc($v[0]) eq $v[0];
844 } grep(/\A(?:[\w-]+\|)*$opt\b.*?(?:\t$cmd)?\z/, keys %OPTDESC);
846 if (my $cb = lazy_cb($self, $cmd, '_complete_')) {
847 puts $self, $cb->($self, @argv, $cur ? ($cur) : ());
849 # TODO: URLs, pathnames, OIDs, MIDs, etc... See optparse() for
854 my ($argv, $env) = @_;
855 my $argc = scalar @$argv;
856 my $buf = 'exec '.join("\0", scalar(@$argv), @$argv);
857 while (my ($k, $v) = each %$env) { $buf .= "\0$k=$v" };
863 my $mua = $self->{opt}->{mua} // return;
864 my $mfolder = $self->{ovv}->{dst};
865 my (@cmd, $replaced);
866 if ($mua =~ /\A(?:mutt|mailx|mail|neomutt)\z/) {
868 # TODO: help wanted: other common FOSS MUAs
870 require Text::ParseWords;
871 @cmd = Text::ParseWords::shellwords($mua);
872 # mutt uses '%f' for open-hook with compressed mbox, we follow
873 @cmd = map { $_ eq '%f' ? ($replaced = $mfolder) : $_ } @cmd;
875 push @cmd, $mfolder unless defined($replaced);
876 if (my $sock = $self->{sock}) { # lei(1) client process runs it
877 send($sock, exec_buf(\@cmd, {}), MSG_EOR);
878 } elsif ($self->{oneshot}) {
879 $self->{"pid.$self.$$"}->{spawn(\@cmd)} = \@cmd;
881 if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
882 syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
884 $self->{opt}->{quiet} = 1;
885 delete $self->{-progress};
886 delete $self->{opt}->{verbose};
889 sub send_exec_cmd { # tell script/lei to execute a command
890 my ($self, $io, $cmd, $env) = @_;
891 my $sock = $self->{sock} // die 'lei client gone';
892 my $fds = [ map { fileno($_) } @$io ];
893 $send_cmd->($sock, $fds, exec_buf($cmd, $env), MSG_EOR);
896 sub poke_mua { # forces terminal MUAs to wake up and hopefully notice new mail
898 my $alerts = $self->{opt}->{alert} // return;
899 while (my $op = shift(@$alerts)) {
900 if ($op eq ':WINCH') {
901 # hit the process group that started the MUA
903 send($self->{sock}, '-WINCH', MSG_EOR);
904 } elsif ($self->{oneshot}) {
907 } elsif ($op eq ':bell') {
909 } elsif ($op =~ /(?<!\\),/) { # bare ',' (not ',,')
910 push @$alerts, split(/(?<!\\),/, $op);
911 } elsif ($op =~ m!\A([/a-z0-9A-Z].+)!) {
912 my $cmd = $1; # run an arbitrary command
913 require Text::ParseWords;
914 $cmd = [ Text::ParseWords::shellwords($cmd) ];
915 if (my $s = $self->{sock}) {
916 send($s, exec_buf($cmd, {}), MSG_EOR);
917 } elsif ($self->{oneshot}) {
918 $self->{"pid.$self.$$"}->{spawn($cmd)} = $cmd;
921 err($self, "W: unsupported --alert=$op"); # non-fatal
926 my %path_to_fd = ('/dev/stdin' => 0, '/dev/stdout' => 1, '/dev/stderr' => 2);
927 $path_to_fd{"/dev/fd/$_"} = $_ for (0..2);
929 # this also normalizes the path
931 my ($self, $path) = @_;
932 $path = rel2abs($self, $path);
934 $path_to_fd{$path} // (
935 ($path =~ m!\A/(?:dev|proc/self)/fd/[0-9]+\z!) ?
936 fail($self, "cannot open $path from daemon") : -1
940 # caller needs to "-t $self->{1}" to check if tty
943 my $fh = popen_rd([qw(git var GIT_PAGER)]);
944 chomp(my $pager = <$fh> // '');
945 close($fh) or warn "`git var PAGER' error: \$?=$?";
946 return if $pager eq 'cat' || $pager eq '';
947 my $new_env = { LESS => 'FRX', LV => '-c' };
948 $new_env->{MORE} = 'FRX' if $^O eq 'freebsd';
949 pipe(my ($r, $wpager)) or return warn "pipe: $!";
950 my $rdr = { 0 => $r, 1 => $self->{1}, 2 => $self->{2} };
951 my $pgr = [ undef, @$rdr{1, 2} ];
952 my $env = $self->{env};
953 if ($self->{sock}) { # lei(1) process runs it
954 delete @$new_env{keys %$env}; # only set iff unset
955 send_exec_cmd($self, [ @$rdr{0..2} ], [$pager], $new_env);
956 } elsif ($self->{oneshot}) {
958 $self->{"pid.$self.$$"}->{spawn($cmd, $new_env, $rdr)} = $cmd;
960 die 'BUG: start_pager w/o socket';
962 $self->{1} = $wpager;
963 $self->{2} = $wpager if -t $self->{2};
964 $env->{GIT_PAGER_IN_USE} = 'true'; # we may spawn git
970 my $pgr = delete($self->{pgr}) or return;
971 $self->{2} = $pgr->[2];
972 # do not restore original stdout, just close it so we error out
973 close(delete($self->{1})) if $self->{1};
976 sub accept_dispatch { # Listener {post_accept} callback
977 my ($sock) = @_; # ignore other
979 my $self = bless { sock => $sock }, __PACKAGE__;
980 vec(my $rvec = '', fileno($sock), 1) = 1;
981 select($rvec, undef, undef, 60) or
982 return send($sock, 'timed out waiting to recv FDs', MSG_EOR);
983 # (4096 * 33) >MAX_ARG_STRLEN
984 my @fds = $recv_cmd->($sock, my $buf, 4096 * 33) or return; # EOF
985 if (!defined($fds[0])) {
986 warn(my $msg = "recv_cmd failed: $!");
987 return send($sock, $msg, MSG_EOR);
991 open($self->{$i++}, '+<&=', $fd) and next;
992 send($sock, "open(+<&=$fd) (FD=$i): $!", MSG_EOR);
994 return if scalar(@fds) != 4;
996 $self->{2}->autoflush(1); # keep stdout buffered until x_it|DESTROY
997 # $ENV_STR = join('', map { "\0$_=$ENV{$_}" } keys %ENV);
998 # $buf = "$argc\0".join("\0", @ARGV).$ENV_STR."\0\0";
999 substr($buf, -2, 2, '') eq "\0\0" or # s/\0\0\z//
1000 return send($sock, 'request command truncated', MSG_EOR);
1001 my ($argc, @argv) = split(/\0/, $buf, -1);
1003 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
1004 if (chdir($self->{3})) {
1006 $self->{env} = \%env;
1007 eval { dispatch($self, @argv) };
1008 send($sock, $@, MSG_EOR) if $@;
1010 send($sock, "fchdir: $!", MSG_EOR); # implicit close
1016 delete $self->{-progress};
1017 for my $f (@WQ_KEYS) {
1018 my $wq = delete $self->{$f} or next;
1020 $wq->wq_close(0, undef, $self);
1021 } elsif ($wq->wq_kill_old) {
1022 $wq->wq_wait_old(undef, $self);
1025 close(delete $self->{1}) if $self->{1}; # may reap_compress
1026 $self->close if $self->{-event_init_done}; # PublicInbox::DS::close
1029 # for long-running results
1032 local %ENV = %{$self->{env}};
1033 my $sock = $self->{sock};
1034 local $current_lei = $self;
1036 while (my @fds = $recv_cmd->($sock, my $buf, 4096)) {
1037 if (scalar(@fds) == 1 && !defined($fds[0])) {
1038 return if $! == EAGAIN;
1039 next if $! == EINTR;
1040 last if $! == ECONNRESET;
1044 open my $rfh, '+<&=', $fd;
1046 die "unrecognized client signal: $buf";
1051 eval { $self->fail($err) };
1056 sub event_step_init {
1058 return if $self->{-event_init_done}++;
1059 if (my $sock = $self->{sock}) { # using DS->EventLoop
1060 $self->SUPER::new($sock, EPOLLIN|EPOLLET);
1066 sub oldset { $oldset }
1068 sub dump_and_clear_log {
1069 if (defined($errors_log) && -s STDIN && seek(STDIN, 0, SEEK_SET)) {
1071 unshift(@pfx, "$errors_log ") if @pfx;
1072 warn @pfx, do { local $/; <STDIN> };
1073 truncate(STDIN, 0) or warn "ftruncate ($errors_log): $!";
1077 # lei(1) calls this when it can't connect
1079 my ($path, $errno, $narg) = @_;
1080 local ($errors_log, $listener);
1081 ($errors_log) = ($path =~ m!\A(.+?/)[^/]+\z!);
1082 $errors_log .= 'errors.log';
1083 my $addr = pack_sockaddr_un($path);
1084 my $lk = bless { lock_path => $errors_log }, 'PublicInbox::Lock';
1086 socket($listener, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
1087 if ($errno == ECONNREFUSED || $errno == ENOENT) {
1088 return if connect($listener, $addr); # another process won
1089 if ($errno == ECONNREFUSED && -S $path) {
1090 unlink($path) or die "unlink($path): $!";
1093 $! = $errno; # allow interpolation to stringify in die
1094 die "connect($path): $!";
1096 umask(077) // die("umask(077): $!");
1097 bind($listener, $addr) or die "bind($path): $!";
1098 listen($listener, 1024) or die "listen: $!";
1101 my @st = stat($path) or die "stat($path): $!";
1102 my $dev_ino_expect = pack('dd', $st[0], $st[1]); # dev+ino
1103 local $oldset = PublicInbox::DS::block_signals();
1105 $send_cmd = PublicInbox::Spawn->can('send_cmd4');
1106 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4') // do {
1107 require PublicInbox::CmdIPC4;
1108 $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4');
1109 PublicInbox::CmdIPC4->can('recv_cmd4');
1112 $recv_cmd or die <<"";
1113 (Socket::MsgHdr || Inline::C) missing/unconfigured (narg=$narg);
1115 require PublicInbox::Listener;
1116 require PublicInbox::EOFpipe;
1117 (-p STDOUT) or die "E: stdout must be a pipe\n";
1118 open(STDIN, '+>>', $errors_log) or die "open($errors_log): $!";
1119 STDIN->autoflush(1);
1120 dump_and_clear_log("from previous daemon process:\n");
1121 POSIX::setsid() > 0 or die "setsid: $!";
1122 my $pid = fork // die "fork: $!";
1124 $0 = "lei-daemon $path";
1126 $listener->blocking(0);
1128 my $pil = PublicInbox::Listener->new($listener, \&accept_dispatch);
1130 pipe(my ($eof_r, $eof_w)) or die "pipe: $!";
1131 PublicInbox::EOFpipe->new($eof_r, \&noop, undef);
1133 $exit_code //= shift;
1134 my $lis = $pil or exit($exit_code);
1135 # closing eof_w triggers \&noop wakeup
1136 $listener = $eof_w = $pil = $path = undef;
1137 $lis->close; # DS::close
1138 PublicInbox::DS->SetLoopTimeout(1000);
1142 CHLD => \&PublicInbox::DS::enqueue_reap,
1150 my $sigfd = PublicInbox::Sigfd->new($sig, SFD_NONBLOCK);
1151 local @SIG{keys %$sig} = values(%$sig) unless $sigfd;
1153 local $SIG{PIPE} = 'IGNORE';
1154 if ($sigfd) { # TODO: use inotify/kqueue to detect unlinked sockets
1156 PublicInbox::DS->SetLoopTimeout(5000);
1158 # wake up every second to accept signals if we don't
1159 # have signalfd or IO::KQueue:
1160 PublicInbox::DS::sig_setmask($oldset);
1161 PublicInbox::DS->SetLoopTimeout(1000);
1163 PublicInbox::DS->SetPostLoopCallback(sub {
1164 my ($dmap, undef) = @_;
1165 if (@st = defined($path) ? stat($path) : ()) {
1166 if ($dev_ino_expect ne pack('dd', $st[0], $st[1])) {
1167 warn "$path dev/ino changed, quitting\n";
1170 } elsif (defined($path)) { # ENOENT is common
1171 warn "stat($path): $!, quitting ...\n" if $! != ENOENT;
1175 return 1 if defined($path);
1178 for my $s (values %$dmap) {
1179 $s->can('busy') or next;
1180 if ($s->busy($now)) {
1186 $n; # true: continue, false: stop
1189 # STDIN was redirected to /dev/null above, closing STDERR and
1190 # STDOUT will cause the calling `lei' client process to finish
1191 # reading the <$daemon> pipe.
1192 local $SIG{__WARN__} = sub {
1193 $current_lei ? err($current_lei, @_) : warn(
1194 strftime('%Y-%m-%dT%H:%M:%SZ', gmtime(time))," $$ ", @_);
1196 open STDERR, '>&STDIN' or die "redirect stderr failed: $!";
1197 open STDOUT, '>&STDIN' or die "redirect stdout failed: $!";
1198 # $daemon pipe to `lei' closed, main loop begins:
1199 PublicInbox::DS->EventLoop;
1200 exit($exit_code // 0);
1203 sub busy { 1 } # prevent daemon-shutdown if client is connected
1205 # for users w/o Socket::Msghdr installed or Inline::C enabled
1207 my ($main_pkg) = @_;
1208 my $exit = $main_pkg->can('exit'); # caller may override exit()
1209 local $quit = $exit if $exit;
1211 umask(077) // die("umask(077): $!");
1219 dispatch($self, @ARGV);
1220 x_it($self, $self->{child_error}) if $self->{child_error};
1223 # ensures stdout hits the FS before sock disconnects so a client
1224 # can immediately reread it
1227 $self->{1}->autoflush(1) if $self->{1};
1230 my $oneshot_pids = delete $self->{"pid.$self.$$"} or return;
1231 waitpid($_, 0) for keys %$oneshot_pids;
1232 $? = $err if $err; # preserve ->fail or ->x_it code