1 # This module is part of debbugs, and is released
2 # under the terms of the GPL version 2, or any later
3 # version at your option.
4 # See the file README and COPYING for more information.
6 # [Other people have contributed to this file; their copyrights should
8 # Copyright 2007 by Don Armstrong <don@donarmstrong.com>.
10 package Debbugs::Common;
14 Debbugs::Common -- Common routines for all of Debbugs
18 use Debbugs::Common qw(:url :html);
23 This module is a replacement for the general parts of errorlib.pl.
24 subroutines in errorlib.pl will be gradually phased out and replaced
25 with equivalent (or better) functionality here.
33 use vars qw($VERSION $DEBUG %EXPORT_TAGS @EXPORT_OK @EXPORT);
34 use base qw(Exporter);
38 $DEBUG = 0 unless defined $DEBUG;
41 %EXPORT_TAGS = (util => [qw(getbugcomponent getbuglocation getlocationpath get_hashname),
42 qw(appendfile buglog getparsedaddrs getmaintainers),
43 qw(getmaintainers_reverse),
46 misc => [qw(make_list globify_scalar english_join checkpid)],
47 date => [qw(secs_to_english)],
49 lock => [qw(filelock unfilelock lockpid)],
52 Exporter::export_ok_tags(qw(lock quit date util misc));
53 $EXPORT_TAGS{all} = [@EXPORT_OK];
56 #use Debbugs::Config qw(:globals);
60 use Debbugs::Config qw(:config);
63 use Debbugs::MIME qw(decode_rfc1522);
69 our $DEBUG_FH = \*STDERR if not defined $DEBUG_FH;
73 The following functions are exported by the C<:util> tag
75 =head2 getbugcomponent
77 my $file = getbugcomponent($bug_number,$extension,$location)
79 Returns the path to the bug file in location C<$location>, bug number
80 C<$bugnumber> and extension C<$extension>
85 my ($bugnum, $ext, $location) = @_;
87 if (not defined $location) {
88 $location = getbuglocation($bugnum, $ext);
89 # Default to non-archived bugs only for now; CGI scripts want
90 # archived bugs but most of the backend scripts don't. For now,
91 # anything that is prepared to accept archived bugs should call
92 # getbuglocation() directly first.
93 return undef if defined $location and
94 ($location ne 'db' and $location ne 'db-h');
95 # if there is no location, the bug doesn't exist
96 return undef if not defined $location;
98 my $dir = getlocationpath($location);
99 return undef if not defined $dir;
100 if (defined $location and $location eq 'db') {
101 return "$dir/$bugnum.$ext";
103 my $hash = get_hashname($bugnum);
104 return "$dir/$hash/$bugnum.$ext";
108 =head2 getbuglocation
110 getbuglocation($bug_number,$extension)
112 Returns the the location in which a particular bug exists; valid
113 locations returned currently are archive, db-h, or db. If the bug does
114 not exist, returns undef.
119 my ($bugnum, $ext) = @_;
120 my $archdir = get_hashname($bugnum);
121 return 'archive' if -r getlocationpath('archive')."/$archdir/$bugnum.$ext";
122 return 'db-h' if -r getlocationpath('db-h')."/$archdir/$bugnum.$ext";
123 return 'db' if -r getlocationpath('db')."/$bugnum.$ext";
128 =head2 getlocationpath
130 getlocationpath($location)
132 Returns the path to a specific location
136 sub getlocationpath {
138 if (defined $location and $location eq 'archive') {
139 return "$config{spool_dir}/archive";
140 } elsif (defined $location and $location eq 'db') {
141 return "$config{spool_dir}/db";
143 return "$config{spool_dir}/db-h";
152 Returns the hash of the bug which is the location within the archive
157 return "" if ( $_[ 0 ] < 0 );
158 return sprintf "%02d", $_[ 0 ] % 100;
165 Returns the path to the logfile corresponding to the bug.
171 my $location = getbuglocation($bugnum, 'log');
172 return getbugcomponent($bugnum, 'log', $location) if ($location);
173 $location = getbuglocation($bugnum, 'log.gz');
174 return getbugcomponent($bugnum, 'log.gz', $location);
180 appendfile($file,'data','to','append');
182 Opens a file for appending and writes data to it.
187 my ($file,@data) = @_;
188 my $fh = IO::File->new($file,'a') or
189 die "Unable top open $file for appending: $!";
190 print {$fh} @data or die "Unable to write to $file: $!";
191 close $fh or die "Unable to close $file: $!";
194 =head2 getparsedaddrs
196 my $address = getparsedaddrs($address);
197 my @address = getparsedaddrs($address);
199 Returns the output from Mail::Address->parse, or the cached output if
200 this address has been parsed before. In SCALAR context returns the
201 first address parsed.
209 return () unless defined $addr;
210 return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0]
211 if exists $_parsedaddrs{$addr};
213 # don't display the warnings from Mail::Address->parse
214 local $SIG{__WARN__} = sub { };
215 @{$_parsedaddrs{$addr}} = Mail::Address->parse($addr);
217 return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0];
220 =head2 getmaintainers
222 my $maintainer = getmaintainers()->{debbugs}
224 Returns a hashref of package => maintainer pairs.
229 our $_maintainer_rev;
231 return $_maintainer if $_maintainer;
234 for my $file (@config{qw(maintainer_file maintainer_file_override pseduo_maint_file)}) {
235 next unless defined $file;
236 my $maintfile = IO::File->new($file,'r') or
237 die "Unable to open maintainer file $file: $!";
238 while(<$maintfile>) {
239 next unless m/^(\S+)\s+(\S.*\S)\s*$/;
243 for my $maint (map {lc($_->address)} getparsedaddrs($b)) {
244 push @{$maintainer_rev{$maint}},$a;
249 $_maintainer = \%maintainer;
250 $_maintainer_rev = \%maintainer_rev;
254 =head2 getmaintainers_reverse
256 my @packages = @{getmaintainers_reverse->{'don@debian.org'}||[]};
258 Returns a hashref of maintainer => [qw(list of packages)] pairs.
262 sub getmaintainers_reverse{
263 return $_maintainer_rev if $_maintainer_rev;
265 return $_maintainer_rev;
270 my $pseudopkgdesc = getpseudodesc(...);
272 Returns the entry for a pseudo package from the
273 $config{pseudo_desc_file}. In cases where pseudo_desc_file is not
274 defined, returns an empty arrayref.
276 This function can be used to see if a particular package is a
277 pseudopackage or not.
283 return $_pseudodesc if $_pseudodesc;
286 if (not defined $config{pseudo_desc_file}) {
290 my $pseudo = IO::File->new($config{pseudo_desc_file},'r')
291 or die "Unable to open $config{pseudo_desc_file}: $!";
293 next unless m/^(\S+)\s+(\S.*\S)\s*$/;
294 $pseudodesc{lc $1} = $2;
297 $_pseudodesc = \%pseudodesc;
304 my $english = secs_to_english($seconds);
305 my ($days,$english) = secs_to_english($seconds);
307 XXX This should probably be changed to use Date::Calc
314 my $days = int($seconds / 86400);
315 my $years = int($days / 365);
319 push @age, "1 year" if ($years == 1);
320 push @age, "$years years" if ($years > 1);
321 push @age, "1 day" if ($days == 1);
322 push @age, "$days days" if ($days > 1);
323 $result .= join(" and ", @age);
325 return wantarray?(int($seconds/86400),$result):$result;
331 These functions are exported with the :lock tag
337 FLOCKs the passed file. Use unfilelock to unlock it.
344 # NB - NOT COMPATIBLE WITH `with-lock'
346 if ($lockfile !~ m{^/}) {
347 $lockfile = cwd().'/'.$lockfile;
350 $count= 10; $errors= '';
353 my $fh2 = IO::File->new($lockfile,'w')
354 or die "Unable to open $lockfile for writing: $!";
355 flock($fh2,LOCK_EX|LOCK_NB)
356 or die "Unable to lock $lockfile $!";
363 push @filelocks, {fh => $fh, file => $lockfile};
368 die "failed to get lock on $lockfile -- $errors";
374 # clean up all outstanding locks at end time
386 Unlocks the file most recently locked.
388 Note that it is not currently possible to unlock a specific file
389 locked with filelock.
394 if (@filelocks == 0) {
395 warn "unfilelock called with no active filelocks!\n";
398 my %fl = %{pop(@filelocks)};
399 flock($fl{fh},LOCK_UN)
400 or warn "Unable to unlock lockfile $fl{file}: $!";
402 or warn "Unable to close lockfile $fl{file}: $!";
404 or warn "Unable to unlink lockfile $fl{file}: $!";
410 lockpid('/path/to/pidfile');
412 Creates a pidfile '/path/to/pidfile' if one doesn't exist or if the
413 pid in the file does not respond to kill 0.
415 Returns 1 on success, false on failure; dies on unusual errors.
422 my $pid = checkpid($pidfile);
423 die "Unable to read pidfile $pidfile: $!" if not defined $pid;
424 return 0 if $pid != 0;
426 die "Unable to unlink stale pidfile $pidfile $!";
428 my $pidfh = IO::File->new($pidfile,'w') or
429 die "Unable to open $pidfile for writing: $!";
430 print {$pidfh} $$ or die "Unable to write to $pidfile $!";
431 close $pidfh or die "Unable to close $pidfile $!";
437 checkpid('/path/to/pidfile');
439 Checks a pid file and determines if the process listed in the pidfile
440 is still running. Returns the pid if it is, 0 if it isn't running, and
441 undef if the pidfile doesn't exist or cannot be read.
448 my $pidfh = IO::File->new($pidfile, 'r') or
453 ($pid) = $pid =~ /(\d+)/;
454 if (defined $pid and kill(0,$pid)) {
467 These functions are exported with the :quit tag.
473 Exits the program by calling die.
475 Usage of quit is deprecated; just call die instead.
480 print {$DEBUG_FH} "quitting >$_[0]<\n" if $DEBUG;
481 carp "quit() is deprecated; call die directly instead";
487 These functions are exported with the :misc tag
491 LIST = make_list(@_);
493 Turns a scalar or an arrayref into a list; expands a list of arrayrefs
496 That is, make_list([qw(a b c)]); returns qw(a b c); make_list([qw(a
497 b)],[qw(c d)] returns qw(a b c d);
502 return map {(ref($_) eq 'ARRAY')?@{$_}:$_} @_;
508 print english_join(', ',' and ',@list);
510 Joins list properly to make an english phrase.
517 my ($normal,$last,@list) = @_;
519 return @list?$list[0]:'';
521 my $ret = $last . pop(@list);
522 $ret = join($normal,@list) . $ret;
527 =head2 globify_scalar
529 my $handle = globify_scalar(\$foo);
531 if $foo isn't already a glob or a globref, turn it into one using
532 IO::Scalar. Gives a new handle to /dev/null if $foo isn't defined.
534 Will carp if given a scalar which isn't a scalarref or a glob (or
535 globref), and return /dev/null. May return undef if IO::Scalar or
536 IO::File fails. (Check $!)
543 if (defined $scalar) {
544 if (defined ref($scalar)) {
545 if (ref($scalar) eq 'SCALAR' and
546 not UNIVERSAL::isa($scalar,'GLOB')) {
547 return IO::Scalar->new($scalar);
553 elsif (UNIVERSAL::isa(\$scalar,'GLOB')) {
557 carp "Given a non-scalar reference, non-glob to globify_scalar; returning /dev/null handle";
560 return IO::File->new('/dev/null','w');