+# This module is part of debbugs, and is released
+# under the terms of the GPL version 2, or any later
+# version at your option.
+# See the file README and COPYING for more information.
+#
+# [Other people have contributed to this file; their copyrights should
+# go here too.]
+# Copyright 2007 by Don Armstrong <don@donarmstrong.com>.
package Debbugs::Common;
subroutines in errorlib.pl will be gradually phased out and replaced
with equivalent (or better) functionality here.
-=head1 BUGS
-
-This module currently requires /etc/debbugs/config; it should use a
-general configuration module so that more intelligent things can be
-done.
-
=head1 FUNCTIONS
=cut
$DEBUG = 0 unless defined $DEBUG;
@EXPORT = ();
- %EXPORT_TAGS = (#status => [qw(getbugstatus)],
- read => [qw(readbug)],
- util => [qw(getbugcomponent getbuglocation getlocationpath get_hashname),
+ %EXPORT_TAGS = (util => [qw(getbugcomponent getbuglocation getlocationpath get_hashname),
+ qw(appendfile buglog getparsedaddrs getmaintainers),
+ qw(getmaintainers_reverse),
+ qw(getpseudodesc),
],
+ misc => [qw(make_list globify_scalar english_join checkpid)],
+ date => [qw(secs_to_english)],
+ quit => [qw(quit)],
+ lock => [qw(filelock unfilelock lockpid)],
);
@EXPORT_OK = ();
- Exporter::export_ok_tags(qw(read util));
+ Exporter::export_ok_tags(qw(lock quit date util misc));
$EXPORT_TAGS{all} = [@EXPORT_OK];
}
#use Debbugs::Config qw(:globals);
+
+use Carp;
+
use Debbugs::Config qw(:config);
use IO::File;
+use IO::Scalar;
use Debbugs::MIME qw(decode_rfc1522);
+use Mail::Address;
+use Cwd qw(cwd);
-=head2 readbug
-
- readbug($bug_number,$location)
-
-Reads a summary file from the archive given a bug number and a bug
-location. Valid locations are those understood by L</getbugcomponent>
-
-=cut
-
-
-my %fields = (originator => 'submitter',
- date => 'date',
- subject => 'subject',
- msgid => 'message-id',
- 'package' => 'package',
- keywords => 'tags',
- done => 'done',
- forwarded => 'forwarded-to',
- mergedwith => 'merged-with',
- severity => 'severity',
- owner => 'owner',
- found_versions => 'found-in',
- fixed_versions => 'fixed-in',
- blocks => 'blocks',
- blockedby => 'blocked-by',
- );
-
-# Fields which need to be RFC1522-decoded in format versions earlier than 3.
-my @rfc1522_fields = qw(originator subject done forwarded owner);
-
-sub readbug {
- my ($lref, $location) = @_;
- my $status = getbugcomponent($lref, 'summary', $location);
- return undef unless defined $status;
- my $status_fh = new IO::File $status, 'r' or
- warn "Unable to open $status for reading: $!" and return undef;
-
- my %data;
- my @lines;
- my $version = 2;
- local $_;
-
- while (<$status_fh>) {
- chomp;
- push @lines, $_;
- $version = $1 if /^Format-Version: ([0-9]+)/i;
- }
-
- # Version 3 is the latest format version currently supported.
- return undef if $version > 3;
-
- my %namemap = reverse %fields;
- for my $line (@lines) {
- if ($line =~ /(\S+?): (.*)/) {
- my ($name, $value) = (lc $1, $2);
- $data{$namemap{$name}} = $value if exists $namemap{$name};
- }
- }
- for my $field (keys %fields) {
- $data{$field} = '' unless exists $data{$field};
- }
-
- $data{severity} = $config{default_severity} if $data{severity} eq '';
- $data{found_versions} = [split ' ', $data{found_versions}];
- $data{fixed_versions} = [split ' ', $data{fixed_versions}];
-
- if ($version < 3) {
- for my $field (@rfc1522_fields) {
- $data{$field} = decode_rfc1522($data{$field});
- }
- }
-
- return \%data;
-}
+use Fcntl qw(:flock);
+our $DEBUG_FH = \*STDERR if not defined $DEBUG_FH;
=head1 UTILITIES
return undef if defined $location and
($location ne 'db' and $location ne 'db-h');
}
- return undef if not defined $location;
my $dir = getlocationpath($location);
return undef if not defined $dir;
- if ($location eq 'db') {
+ if (defined $location and $location eq 'db') {
return "$dir/$bugnum.$ext";
} else {
my $hash = get_hashname($bugnum);
return sprintf "%02d", $_[ 0 ] % 100;
}
+=head2 buglog
+
+ buglog($bugnum);
+
+Returns the path to the logfile corresponding to the bug.
+
+=cut
+
+sub buglog {
+ my $bugnum = shift;
+ my $location = getbuglocation($bugnum, 'log');
+ return getbugcomponent($bugnum, 'log', $location) if ($location);
+ $location = getbuglocation($bugnum, 'log.gz');
+ return getbugcomponent($bugnum, 'log.gz', $location);
+}
+
+
+=head2 appendfile
+
+ appendfile($file,'data','to','append');
+
+Opens a file for appending and writes data to it.
+
+=cut
+
+sub appendfile {
+ my ($file,@data) = @_;
+ my $fh = IO::File->new($file,'a') or
+ die "Unable top open $file for appending: $!";
+ print {$fh} @data or die "Unable to write to $file: $!";
+ close $fh or die "Unable to close $file: $!";
+}
+
+=head2 getparsedaddrs
+
+ my $address = getparsedaddrs($address);
+ my @address = getparsedaddrs($address);
+
+Returns the output from Mail::Address->parse, or the cached output if
+this address has been parsed before. In SCALAR context returns the
+first address parsed.
+
+=cut
+
+
+our %_parsedaddrs;
+sub getparsedaddrs {
+ my $addr = shift;
+ return () unless defined $addr;
+ return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0]
+ if exists $_parsedaddrs{$addr};
+ {
+ # don't display the warnings from Mail::Address->parse
+ local $SIG{__WARN__} = sub { };
+ @{$_parsedaddrs{$addr}} = Mail::Address->parse($addr);
+ }
+ return wantarray?@{$_parsedaddrs{$addr}}:$_parsedaddrs{$addr}[0];
+}
+
+=head2 getmaintainers
+
+ my $maintainer = getmaintainers()->{debbugs}
+
+Returns a hashref of package => maintainer pairs.
+
+=cut
+
+our $_maintainer;
+our $_maintainer_rev;
+sub getmaintainers {
+ return $_maintainer if $_maintainer;
+ my %maintainer;
+ my %maintainer_rev;
+ for my $file (@config{qw(maintainer_file maintainer_file_override pseduo_maint_file)}) {
+ next unless defined $file;
+ my $maintfile = IO::File->new($file,'r') or
+ die "Unable to open maintainer file $file: $!";
+ while(<$maintfile>) {
+ next unless m/^(\S+)\s+(\S.*\S)\s*$/;
+ ($a,$b)=($1,$2);
+ $a =~ y/A-Z/a-z/;
+ $maintainer{$a}= $b;
+ for my $maint (map {lc($_->address)} getparsedaddrs($b)) {
+ push @{$maintainer_rev{$maint}},$a;
+ }
+ }
+ close($maintfile);
+ }
+ $_maintainer = \%maintainer;
+ $_maintainer_rev = \%maintainer_rev;
+ return $_maintainer;
+}
+
+=head2 getmaintainers_reverse
+
+ my @packages = @{getmaintainers_reverse->{'don@debian.org'}||[]};
+
+Returns a hashref of maintainer => [qw(list of packages)] pairs.
+
+=cut
+
+sub getmaintainers_reverse{
+ return $_maintainer_rev if $_maintainer_rev;
+ getmaintainers();
+ return $_maintainer_rev;
+}
+
+=head2 getpseudodesc
+
+ my $pseudopkgdesc = getpseudodesc(...);
+
+Returns the entry for a pseudo package from the
+$config{pseudo_desc_file}. In cases where pseudo_desc_file is not
+defined, returns an empty arrayref.
+
+This function can be used to see if a particular package is a
+pseudopackage or not.
+
+=cut
+
+our $_pseudodesc;
+sub getpseudodesc {
+ return $_pseudodesc if $_pseudodesc;
+ my %pseudodesc;
+
+ if (not defined $config{pseudo_desc_file}) {
+ $_pseudodesc = {};
+ return $_pseudodesc;
+ }
+ my $pseudo = IO::File->new($config{pseudo_desc_file},'r')
+ or die "Unable to open $config{pseudo_desc_file}: $!";
+ while(<$pseudo>) {
+ next unless m/^(\S+)\s+(\S.*\S)\s*$/;
+ $pseudodesc{lc $1} = $2;
+ }
+ close($pseudo);
+ $_pseudodesc = \%pseudodesc;
+ return $_pseudodesc;
+}
+
+
+=head1 DATE
+
+ my $english = secs_to_english($seconds);
+ my ($days,$english) = secs_to_english($seconds);
+
+XXX This should probably be changed to use Date::Calc
+
+=cut
+
+sub secs_to_english{
+ my ($seconds) = @_;
+
+ my $days = int($seconds / 86400);
+ my $years = int($days / 365);
+ $days %= 365;
+ my $result;
+ my @age;
+ push @age, "1 year" if ($years == 1);
+ push @age, "$years years" if ($years > 1);
+ push @age, "1 day" if ($days == 1);
+ push @age, "$days days" if ($days > 1);
+ $result .= join(" and ", @age);
+
+ return wantarray?(int($seconds/86400),$result):$result;
+}
+
+
+=head1 LOCK
+
+These functions are exported with the :lock tag
+
+=head2 filelock
+ filelock
+
+FLOCKs the passed file. Use unfilelock to unlock it.
+
+=cut
+
+our @filelocks;
+
+sub filelock {
+ # NB - NOT COMPATIBLE WITH `with-lock'
+ my ($lockfile) = @_;
+ if ($lockfile !~ m{^/}) {
+ $lockfile = cwd().'/'.$lockfile;
+ }
+ my ($count,$errors);
+ $count= 10; $errors= '';
+ for (;;) {
+ my $fh = eval {
+ my $fh2 = IO::File->new($lockfile,'w')
+ or die "Unable to open $lockfile for writing: $!";
+ flock($fh2,LOCK_EX|LOCK_NB)
+ or die "Unable to lock $lockfile $!";
+ return $fh2;
+ };
+ if ($@) {
+ $errors .= $@;
+ }
+ if ($fh) {
+ push @filelocks, {fh => $fh, file => $lockfile};
+ last;
+ }
+ if (--$count <=0) {
+ $errors =~ s/\n+$//;
+ die "failed to get lock on $lockfile -- $errors";
+ }
+ sleep 10;
+ }
+}
+
+# clean up all outstanding locks at end time
+END {
+ while (@filelocks) {
+ unfilelock();
+ }
+}
+
+
+=head2 unfilelock
+
+ unfilelock()
+
+Unlocks the file most recently locked.
+
+Note that it is not currently possible to unlock a specific file
+locked with filelock.
+
+=cut
+
+sub unfilelock {
+ if (@filelocks == 0) {
+ warn "unfilelock called with no active filelocks!\n";
+ return;
+ }
+ my %fl = %{pop(@filelocks)};
+ flock($fl{fh},LOCK_UN)
+ or warn "Unable to unlock lockfile $fl{file}: $!";
+ close($fl{fh})
+ or warn "Unable to close lockfile $fl{file}: $!";
+ unlink($fl{file})
+ or warn "Unable to unlink lockfile $fl{file}: $!";
+}
+
+
+=head2 lockpid
+
+ lockpid('/path/to/pidfile');
+
+Creates a pidfile '/path/to/pidfile' if one doesn't exist or if the
+pid in the file does not respond to kill 0.
+
+Returns 1 on success, false on failure; dies on unusual errors.
+
+=cut
+
+sub lockpid {
+ my ($pidfile) = @_;
+ if (-e $pidfile) {
+ my $pid = checkpid($pidfile);
+ die "Unable to read pidfile $pidfile: $!" if not defined $pid;
+ return 0 if $pid != 0;
+ unlink $pidfile or
+ die "Unable to unlink stale pidfile $pidfile $!";
+ }
+ my $pidfh = IO::File->new($pidfile,'w') or
+ die "Unable to open $pidfile for writing: $!";
+ print {$pidfh} $$ or die "Unable to write to $pidfile $!";
+ close $pidfh or die "Unable to close $pidfile $!";
+ return 1;
+}
+
+=head2 checkpid
+
+ checkpid('/path/to/pidfile');
+
+Checks a pid file and determines if the process listed in the pidfile
+is still running. Returns the pid if it is, 0 if it isn't running, and
+undef if the pidfile doesn't exist or cannot be read.
+
+=cut
+
+sub checkpid{
+ my ($pidfile) = @_;
+ if (-e $pidfile) {
+ my $pidfh = IO::File->new($pidfile, 'r') or
+ return undef;
+ local $/;
+ my $pid = <$pidfh>;
+ close $pidfh;
+ ($pid) = $pid =~ /(\d+)/;
+ if (defined $pid and kill(0,$pid)) {
+ return $pid;
+ }
+ return 0;
+ }
+ else {
+ return undef;
+ }
+}
+
+
+=head1 QUIT
+
+These functions are exported with the :quit tag.
+
+=head2 quit
+
+ quit()
+
+Exits the program by calling die.
+
+Usage of quit is deprecated; just call die instead.
+
+=cut
+
+sub quit {
+ print {$DEBUG_FH} "quitting >$_[0]<\n" if $DEBUG;
+ carp "quit() is deprecated; call die directly instead";
+}
+
+
+=head1 MISC
+
+These functions are exported with the :misc tag
+
+=head2 make_list
+
+ LIST = make_list(@_);
+
+Turns a scalar or an arrayref into a list; expands a list of arrayrefs
+into a list.
+
+That is, make_list([qw(a b c)]); returns qw(a b c); make_list([qw(a
+b)],[qw(c d)] returns qw(a b c d);
+
+=cut
+
+sub make_list {
+ return map {(ref($_) eq 'ARRAY')?@{$_}:$_} @_;
+}
+
+
+=head2 english_join
+
+ print english_join(', ',' and ',@list);
+
+Joins list properly to make an english phrase.
+
+
+
+=cut
+
+sub english_join {
+ my ($normal,$last,@list) = @_;
+ if (@list <= 1) {
+ return @list?$list[0]:'';
+ }
+ my $ret = $last . pop(@list);
+ $ret = join($normal,@list) . $ret;
+ return $ret;
+}
+
+
+=head2 globify_scalar
+
+ my $handle = globify_scalar(\$foo);
+
+if $foo isn't already a glob or a globref, turn it into one using
+IO::Scalar. Gives a new handle to /dev/null if $foo isn't defined.
+
+Will carp if given a scalar which isn't a scalarref or a glob (or
+globref), and return /dev/null. May return undef if IO::Scalar or
+IO::File fails. (Check $!)
+
+=cut
+
+sub globify_scalar {
+ my ($scalar) = @_;
+ my $handle;
+ if (defined $scalar) {
+ if (defined ref($scalar)) {
+ if (ref($scalar) eq 'SCALAR' and
+ not UNIVERSAL::isa($scalar,'GLOB')) {
+ return IO::Scalar->new($scalar);
+ }
+ else {
+ return $scalar;
+ }
+ }
+ elsif (UNIVERSAL::isa(\$scalar,'GLOB')) {
+ return $scalar;
+ }
+ else {
+ carp "Given a non-scalar reference, non-glob to globify_scalar; returning /dev/null handle";
+ }
+ }
+ return IO::File->new('/dev/null','w');
+}
1;
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