use warnings;
use strict;
use vars qw($VERSION $DEBUG %EXPORT_TAGS @EXPORT_OK @EXPORT);
-use base qw(Exporter);
+use Exporter qw(import);
+use v5.10;
BEGIN{
$VERSION = 1.00;
@EXPORT = ();
%EXPORT_TAGS = (util => [qw(getbugcomponent getbuglocation getlocationpath get_hashname),
- qw(appendfile buglog getparsedaddrs getmaintainers),
+ qw(appendfile overwritefile buglog getparsedaddrs getmaintainers),
+ qw(getsourcemaintainers getsourcemaintainers_reverse),
qw(bug_status),
qw(getmaintainers_reverse),
qw(getpseudodesc),
qw(package_maintainer),
+ qw(sort_versions),
+ qw(open_compressed_file),
+ qw(walk_bugs),
],
misc => [qw(make_list globify_scalar english_join checkpid),
qw(cleanup_eval_fail),
+ qw(hash_slice),
],
date => [qw(secs_to_english)],
quit => [qw(quit)],
- lock => [qw(filelock unfilelock lockpid)],
+ lock => [qw(filelock unfilelock lockpid simple_filelock simple_unlockfile)],
);
@EXPORT_OK = ();
- Exporter::export_ok_tags(qw(lock quit date util misc));
+ Exporter::export_ok_tags(keys %EXPORT_TAGS);
$EXPORT_TAGS{all} = [@EXPORT_OK];
}
#use Debbugs::Config qw(:globals);
use Carp;
+$Carp::Verbose = 1;
use Debbugs::Config qw(:config);
use IO::File;
use Debbugs::MIME qw(decode_rfc1522);
use Mail::Address;
use Cwd qw(cwd);
+use Storable qw(dclone);
+use Time::HiRes qw(usleep);
+use File::Path qw(mkpath);
+use File::Basename qw(dirname);
+use MLDBM qw(DB_File Storable);
+$MLDBM::DumpMeth='portable';
+use List::AllUtils qw(natatime);
use Params::Validate qw(validate_with :types);
-use Fcntl qw(:flock);
+use Fcntl qw(:DEFAULT :flock);
+use Encode qw(is_utf8 decode_utf8);
our $DEBUG_FH = \*STDERR if not defined $DEBUG_FH;
close $fh or die "Unable to close $file: $!";
}
+=head2 overwritefile
+
+ ovewritefile($file,'data','to','append');
+
+Opens file.new, writes data to it, then moves file.new to file.
+
+=cut
+
+sub overwritefile {
+ my ($file,@data) = @_;
+ my $fh = IO::File->new("${file}.new",'w') or
+ die "Unable top open ${file}.new for writing: $!";
+ print {$fh} @data or die "Unable to write to ${file}.new: $!";
+ close $fh or die "Unable to close ${file}.new: $!";
+ rename("${file}.new",$file) or
+ die "Unable to rename ${file}.new to $file: $!";
+}
+
+=head2 open_compressed_file
+
+ my $fh = open_compressed_file('foo.gz') or
+ die "Unable to open compressed file: $!";
+
+
+Opens a file; if the file ends in .gz, .xz, or .bz2, the appropriate
+decompression program is forked and output from it is read.
+
+This routine by default opens the file with UTF-8 encoding; if you want some
+other encoding, specify it with the second option.
+
+=cut
+sub open_compressed_file {
+ my ($file,$encoding) = @_;
+ $encoding //= ':encoding(UTF-8)';
+ my $fh;
+ my $mode = "<$encoding";
+ my @opts;
+ if ($file =~ /\.gz$/) {
+ $mode = "-|$encoding";
+ push @opts,'gzip','-dc';
+ }
+ if ($file =~ /\.xz$/) {
+ $mode = "-|$encoding";
+ push @opts,'xz','-dc';
+ }
+ if ($file =~ /\.bz2$/) {
+ $mode = "-|$encoding";
+ push @opts,'bzip2','-dc';
+ }
+ open($fh,$mode,@opts,$file);
+ return $fh;
+}
+
+=head2 walk_bugs
+
+Walk through directories of bugs, calling a subroutine with a list of bugs
+found.
+
+C<walk_bugs(callback => sub {print map {qq($_\n)} @_},dirs => [qw(db-h)];>
+
+=over
+
+=item callback -- CODEREF of a subroutine to call with a list of bugs
+
+=item dirs -- ARRAYREF of directories to get bugs from. Like C<[qw(db-h archive)]>.
+
+=item bugs -- ARRAYREF of bugs to walk through. If both C<dirs> and C<bugs> are
+provided, both are walked through.
+
+=item bugs_per_call -- maximum number of bugs to provide to callback
+
+=item progress_bar -- optional L<Term::ProgressBar>
+
+=item bug_file -- bug file to look for (generally C<summary>)
+
+=item logging -- optional filehandle to output logging information
+
+=back
+
+=cut
+
+sub walk_bugs {
+ state $spec =
+ {dirs => {type => ARRAYREF,
+ default => [],
+ },
+ bugs => {type => ARRAYREF,
+ default => [],
+ },
+ progress_bar => {type => OBJECT|UNDEF,
+ optional => 1,
+ },
+ bug_file => {type => SCALAR,
+ default => 'summary',
+ },
+ logging => {type => HANDLE,
+ optional => 1,
+ },
+ callback => {type => CODEREF,
+ },
+ bugs_per_call => {type => SCALAR,
+ default => 1,
+ },
+ };
+ my %param = validate_with(params => \@_,
+ spec => $spec
+ );
+ my @dirs = @{$param{dirs}};
+ my @initial_bugs = ();
+ if (@{$param{bugs}}) {
+ unshift @dirs,'';
+ @initial_bugs = @{$param{bugs}};
+ }
+ my $tot_dirs = @dirs;
+ my $done_dirs = 0;
+ my $avg_subfiles = 0;
+ my $completed_files = 0;
+ my $dir;
+ while ($dir = shift @dirs or defined $dir) {
+ my @list;
+ my @subdirs;
+ if (not length $dir and @initial_bugs) {
+ push @list,@initial_bugs;
+ @initial_bugs = ();
+ } else {
+ printf {$param{verbose}} "Doing dir %s ...\n", $dir
+ if defined $param{verbose};
+ opendir(my $DIR, "$dir/.") or
+ die "opendir $dir: $!";
+ @subdirs = readdir($DIR) or
+ die "Unable to readdir $dir: $!";
+ closedir($DIR) or
+ die "Unable to closedir $dir: $!";
+
+ @list = map { m/^(\d+)\.$param{bug_file}$/?($1):() } @subdirs;
+ }
+ $tot_dirs -= @dirs;
+ push @dirs, map { m/^(\d+)$/ && -d "$dir/$1"?("$dir/$1"):() } @subdirs;
+ $tot_dirs += @dirs;
+ if ($param{progress_bar}) {
+ if ($avg_subfiles == 0) {
+ $avg_subfiles = @list;
+ }
+ $param{progress_bar}->
+ target($avg_subfiles*($tot_dirs-$done_dirs)+$completed_files+@list);
+ $avg_subfiles = ($avg_subfiles * $done_dirs + @list) / ($done_dirs+1);
+ $done_dirs += 1;
+ }
+
+ my $it = natatime $param{bugs_per_call},@list;
+ while (my @bugs = $it->()) {
+ $param{callback}->(@bugs);
+ $completed_files += scalar @bugs;
+ if ($param{progress_bar}) {
+ $param{progress_bar}->update($completed_files) if $param{progress_bar};
+ }
+ if ($completed_files % 100 == 0 and
+ defined $param{verbose}) {
+ print {$param{verbose}} "Up to $completed_files bugs...\n"
+ }
+ }
+ }
+ $param{progress_bar}->remove() if $param{progress_bar};
+}
+
+
=head2 getparsedaddrs
my $address = getparsedaddrs($address);
return $_maintainer_rev;
}
+=head2 getsourcemaintainers
+
+ my $maintainer = getsourcemaintainers()->{debbugs}
+
+Returns a hashref of src_package => maintainer pairs.
+
+=cut
+
+our $_source_maintainer = undef;
+our $_source_maintainer_rev = undef;
+sub getsourcemaintainers {
+ return $_source_maintainer if defined $_source_maintainer;
+ package_maintainer(rehash => 1);
+ return $_source_maintainer;
+}
+
+=head2 getsourcemaintainers_reverse
+
+ my @src_packages = @{getsourcemaintainers_reverse->{'don@debian.org'}||[]};
+
+Returns a hashref of maintainer => [qw(list of source packages)] pairs.
+
+=cut
+
+sub getsourcemaintainers_reverse{
+ return $_source_maintainer_rev if defined $_source_maintainer_rev;
+ package_maintainer(rehash => 1);
+ return $_source_maintainer_rev;
+}
+
=head2 package_maintainer
my @s = package_maintainer(source => [qw(foo bar baz)],
maintainers for; automatically returns source package maintainer if
the package name starts with 'src:', defaults to the empty arrayref.
-=item reverse -- whether to return the source/binary packages a
-maintainer maintains instead
+=item maintainer -- scalar or arrayref of maintainers to return source packages
+for. If given, binary and source cannot be given.
=item rehash -- whether to reread the maintainer and source maintainer
files; defaults to 0
+=item schema -- Debbugs::DB schema. If set, uses the database for maintainer
+information.
+
=back
=cut
-our $_source_maintainer = undef;
-our $_source_maintainer_rev = undef;
sub package_maintainer {
my %param = validate_with(params => \@_,
spec => {source => {type => SCALAR|ARRAYREF,
binary => {type => SCALAR|ARRAYREF,
default => [],
},
+ maintainer => {type => SCALAR|ARRAYREF,
+ default => [],
+ },
rehash => {type => BOOLEAN,
default => 0,
},
reverse => {type => BOOLEAN,
default => 0,
},
+ schema => {type => OBJECT,
+ optional => 1,
+ }
},
);
+ my @binary = make_list($param{binary});
+ my @source = make_list($param{source});
+ my @maintainers = make_list($param{maintainer});
+ if ((@binary or @source) and @maintainers) {
+ croak "It is nonsensical to pass both maintainers and source or binary";
+ }
+ if (@binary) {
+ @source = grep {/^src:/} @binary;
+ @binary = grep {!/^src:/} @binary;
+ }
+ # remove leading src: from source package names
+ s/^src:// foreach @source;
+ if ($param{schema}) {
+ my $s = $param{schema};
+ if (@maintainers) {
+ my $m_rs = $s->resultset('SrcPkg')->
+ search({'correspondent.addr' => [@maintainers]},
+ {join => {src_vers =>
+ {maintainer =>
+ 'correspondent'},
+ },
+ columns => ['pkg'],
+ group_by => [qw(me.pkg)],
+ });
+ return $m_rs->get_column('pkg')->all();
+ } elsif (@binary or @source) {
+ my $rs = $s->resultset('Maintainer');
+ if (@binary) {
+ $rs =
+ $rs->search({'bin_pkg.pkg' => [@binary]},
+ {join => {src_vers =>
+ {bin_vers => 'bin_pkg'},
+ },
+ columns => ['name'],
+ group_by => [qw(me.name)],
+ }
+ );
+ }
+ if (@source) {
+ $rs =
+ $rs->search({'src_pkg.pkg' => [@source]},
+ {join => {src_vers =>
+ 'src_pkg',
+ },
+ columns => ['name'],
+ group_by => [qw(me.name)],
+ }
+ );
+ }
+ return $rs->get_column('name')->all();
+ }
+ return ();
+ }
if ($param{rehash}) {
$_source_maintainer = undef;
$_source_maintainer_rev = undef;
not defined $_source_maintainer_rev) {
$_source_maintainer = {};
$_source_maintainer_rev = {};
- for my $fn (@config{('source_maintainer_file',
- 'source_maintainer_file_override',
- 'pseduo_maint_file')}) {
- next unless defined $fn;
- if (not -e $fn) {
- warn "Missing source maintainer file '$fn'";
- next;
+ if (-e $config{spool_dir}.'/source_maintainers.idx' and
+ -e $config{spool_dir}.'/source_maintainers_reverse.idx'
+ ) {
+ tie %{$_source_maintainer},
+ MLDBM => $config{spool_dir}.'/source_maintainers.idx',
+ O_RDONLY or
+ die "Unable to tie source maintainers: $!";
+ tie %{$_source_maintainer_rev},
+ MLDBM => $config{spool_dir}.'/source_maintainers_reverse.idx',
+ O_RDONLY or
+ die "Unable to tie source maintainers reverse: $!";
+ } else {
+ for my $fn (@config{('source_maintainer_file',
+ 'source_maintainer_file_override',
+ 'pseudo_maint_file')}) {
+ next unless defined $fn and length $fn;
+ if (not -e $fn) {
+ warn "Missing source maintainer file '$fn'";
+ next;
+ }
+ __add_to_hash($fn,$_source_maintainer,
+ $_source_maintainer_rev);
}
- __add_to_hash($fn,$_source_maintainer,
- $_source_maintainer_rev);
}
}
if (not defined $_maintainer or
not defined $_maintainer_rev) {
$_maintainer = {};
$_maintainer_rev = {};
- for my $fn (@config{('maintainer_file',
- 'maintainer_file_override',
- 'pseduo_maint_file')}) {
- next unless defined $fn;
- if (not -e $fn) {
- warn "Missing maintainer file '$fn'";
- next;
- }
- __add_to_hash($fn,$_maintainer,
+ if (-e $config{spool_dir}.'/maintainers.idx' and
+ -e $config{spool_dir}.'/maintainers_reverse.idx'
+ ) {
+ tie %{$_maintainer},
+ MLDBM => $config{spool_dir}.'/binary_maintainers.idx',
+ O_RDONLY or
+ die "Unable to tie binary maintainers: $!";
+ tie %{$_maintainer_rev},
+ MLDBM => $config{spool_dir}.'/binary_maintainers_reverse.idx',
+ O_RDONLY or
+ die "Unable to binary maintainers reverse: $!";
+ } else {
+ for my $fn (@config{('maintainer_file',
+ 'maintainer_file_override',
+ 'pseudo_maint_file')}) {
+ next unless defined $fn and length $fn;
+ if (not -e $fn) {
+ warn "Missing maintainer file '$fn'";
+ next;
+ }
+ __add_to_hash($fn,$_maintainer,
$_maintainer_rev);
+ }
}
}
my @return;
- my @extra_source;
- my $b = $param{reverse}?$_maintainer_rev:$_maintainer;
- for my $binary (make_list($param{binary})) {
- if (not $param{reverse} and $binary =~ /^src:/) {
- push @extra_source,$binary;
+ for my $binary (@binary) {
+ if ($binary =~ /^src:/) {
+ push @source,$binary;
next;
}
- push @return,grep {defined $_} make_list($b->{$binary});
+ push @return,grep {defined $_} make_list($_maintainer->{$binary});
}
- my $s = $param{reverse}?$_source_maintainer_rev:$_source_maintainer;
- for my $source (make_list($param{source},@extra_source)) {
+ for my $source (@source) {
$source =~ s/^src://;
- push @return,grep {defined $_} make_list($s->{$source});
+ push @return,grep {defined $_} make_list($_source_maintainer->{$source});
+ }
+ for my $maintainer (grep {defined $_} @maintainers) {
+ push @return,grep {defined $_}
+ make_list($_maintainer_rev->{$maintainer});
+ push @return,map {$_ !~ /^src:/?'src:'.$_:$_}
+ grep {defined $_}
+ make_list($_source_maintainer_rev->{$maintainer});
}
return @return;
}
}
$type //= 'address';
my $fh = IO::File->new($fn,'r') or
- die "Unable to open $fn for reading: $!";
+ croak "Unable to open $fn for reading: $!";
+ binmode($fh,':encoding(UTF-8)');
while (<$fh>) {
chomp;
- next unless m/^(\S+)\s+(\S.*\S)\s*$/;
- my ($key,$value)=($1,$2);
+ next unless m/^(\S+)\s+(\S.*\S)\s*$/;
+ my ($key,$value)=($1,$2);
$key = lc $key;
$forward->{$key}= $value;
if (defined $reverse) {
return $_pseudodesc if defined $_pseudodesc;
$_pseudodesc = {};
__add_to_hash($config{pseudo_desc_file},$_pseudodesc) if
- defined $config{pseudo_desc_file};
+ defined $config{pseudo_desc_file} and
+ length $config{pseudo_desc_file};
return $_pseudodesc;
}
+=head2 sort_versions
+
+ sort_versions('1.0-2','1.1-2');
+
+Sorts versions using AptPkg::Versions::compare if it is available, or
+Debbugs::Versions::Dpkg::vercmp if it isn't.
+
+=cut
+
+our $vercmp;
+BEGIN{
+ use Debbugs::Versions::Dpkg;
+ $vercmp=\&Debbugs::Versions::Dpkg::vercmp;
+
+# eventually we'll use AptPkg:::Version or similar, but the current
+# implementation makes this *super* difficult.
+
+# eval {
+# use AptPkg::Version;
+# $vercmp=\&AptPkg::Version::compare;
+# };
+}
+
+sub sort_versions{
+ return sort {$vercmp->($a,$b)} @_;
+}
+
=head1 DATE
=head2 filelock
- filelock
+ filelock($lockfile);
+ filelock($lockfile,$locks);
FLOCKs the passed file. Use unfilelock to unlock it.
+Can be passed an optional $locks hashref, which is used to track which
+files are locked (and how many times they have been locked) to allow
+for cooperative locking.
+
=cut
our @filelocks;
+use Carp qw(cluck);
+
sub filelock {
# NB - NOT COMPATIBLE WITH `with-lock'
- my ($lockfile) = @_;
+ my ($lockfile,$locks) = @_;
if ($lockfile !~ m{^/}) {
$lockfile = cwd().'/'.$lockfile;
}
- my ($count,$errors);
- $count= 10; $errors= '';
- for (;;) {
- my $fh = eval {
+ # This is only here to allow for relocking bugs inside of
+ # Debbugs::Control. Nothing else should be using it.
+ if (defined $locks and exists $locks->{locks}{$lockfile} and
+ $locks->{locks}{$lockfile} >= 1) {
+ if (exists $locks->{relockable} and
+ exists $locks->{relockable}{$lockfile}) {
+ $locks->{locks}{$lockfile}++;
+ # indicate that the bug for this lockfile needs to be reread
+ $locks->{relockable}{$lockfile} = 1;
+ push @{$locks->{lockorder}},$lockfile;
+ return;
+ }
+ else {
+ use Data::Dumper;
+ confess "Locking already locked file: $lockfile\n".Data::Dumper->Dump([$lockfile,$locks],[qw(lockfile locks)]);
+ }
+ }
+ my ($fh,$t_lockfile,$errors) =
+ simple_filelock($lockfile,10,1);
+ if ($fh) {
+ push @filelocks, {fh => $fh, file => $lockfile};
+ if (defined $locks) {
+ $locks->{locks}{$lockfile}++;
+ push @{$locks->{lockorder}},$lockfile;
+ }
+ } else {
+ use Data::Dumper;
+ croak "failed to get lock on $lockfile -- $errors".
+ (defined $locks?Data::Dumper->Dump([$locks],[qw(locks)]):'');
+ }
+}
+
+=head2 simple_filelock
+
+ my ($fh,$t_lockfile,$errors) =
+ simple_filelock($lockfile,$count,$wait);
+
+Does a flock of lockfile. If C<$count> is zero, does a blocking lock.
+Otherwise, does a non-blocking lock C<$count> times, waiting C<$wait>
+seconds in between.
+
+In list context, returns the lockfile filehandle, lockfile name, and
+any errors which occured.
+
+When the lockfile filehandle is undef, locking failed.
+
+These lockfiles must be unlocked manually at process end.
+
+
+=cut
+
+sub simple_filelock {
+ my ($lockfile,$count,$wait) = @_;
+ if (not defined $count) {
+ $count = 10;
+ }
+ if ($count < 0) {
+ $count = 0;
+ }
+ if (not defined $wait) {
+ $wait = 1;
+ }
+ my $errors= '';
+ my $fh;
+ while (1) {
+ $fh = eval {
my $fh2 = IO::File->new($lockfile,'w')
or die "Unable to open $lockfile for writing: $!";
- flock($fh2,LOCK_EX|LOCK_NB)
+ # Do a blocking lock if count is zero
+ flock($fh2,LOCK_EX|($count == 0?0: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 -- $errors";
+ if ($fh) {
+ last;
}
- sleep 10;
+ # use usleep for fractional wait seconds
+ usleep($wait * 1_000_000);
+ } continue {
+ last unless (--$count > 0);
+ }
+ if ($fh) {
+ return wantarray?($fh,$lockfile,$errors):$fh
}
+ return wantarray?(undef,$lockfile,$errors):undef;
}
# clean up all outstanding locks at end time
}
}
+=head2 simple_unlockfile
+
+ simple_unlockfile($fh,$lockfile);
+
+
+=cut
+
+sub simple_unlockfile {
+ my ($fh,$lockfile) = @_;
+ flock($fh,LOCK_UN)
+ or warn "Unable to unlock lockfile $lockfile: $!";
+ close($fh)
+ or warn "Unable to close lockfile $lockfile: $!";
+ unlink($lockfile)
+ or warn "Unable to unlink lockfile $lockfile: $!";
+}
+
=head2 unfilelock
unfilelock()
+ unfilelock($locks);
Unlocks the file most recently locked.
=cut
sub unfilelock {
+ my ($locks) = @_;
if (@filelocks == 0) {
- warn "unfilelock called with no active filelocks!\n";
+ carp "unfilelock called with no active filelocks!\n";
return;
}
+ if (defined $locks and ref($locks) ne 'HASH') {
+ croak "hash not passsed to unfilelock";
+ }
+ if (defined $locks and exists $locks->{lockorder} and
+ @{$locks->{lockorder}} and
+ exists $locks->{locks}{$locks->{lockorder}[-1]}) {
+ my $lockfile = pop @{$locks->{lockorder}};
+ $locks->{locks}{$lockfile}--;
+ if ($locks->{locks}{$lockfile} > 0) {
+ return
+ }
+ delete $locks->{locks}{$lockfile};
+ }
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}: $!";
+ simple_unlockfile($fl{fh},$fl{file});
}
unlink $pidfile or
die "Unable to unlink stale pidfile $pidfile $!";
}
- my $pidfh = IO::File->new($pidfile,'w') or
+ mkpath(dirname($pidfile));
+ my $pidfh = IO::File->new($pidfile,O_CREAT|O_EXCL|O_WRONLY) 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 $!";
globref), and return /dev/null. May return undef if IO::Scalar or
IO::File fails. (Check $!)
+The scalar will fill with octets, not perl's internal encoding, so you
+must use decode_utf8() after on the scalar, and encode_utf8() on it
+before. This appears to be a bug in the underlying modules.
+
=cut
+our $_NULL_HANDLE;
+
sub globify_scalar {
my ($scalar) = @_;
my $handle;
if (defined ref($scalar)) {
if (ref($scalar) eq 'SCALAR' and
not UNIVERSAL::isa($scalar,'GLOB')) {
- return IO::Scalar->new($scalar);
+ if (is_utf8(${$scalar})) {
+ ${$scalar} = decode_utf8(${$scalar});
+ carp(q(\$scalar must not be in perl's internal encoding));
+ }
+ open $handle, '>:scalar:utf8', $scalar;
+ return $handle;
}
else {
return $scalar;
else {
carp "Given a non-scalar reference, non-glob to globify_scalar; returning /dev/null handle";
}
+ }
+ if (not defined $_NULL_HANDLE or
+ not $_NULL_HANDLE->opened()
+ ) {
+ $_NULL_HANDLE =
+ IO::File->new('/dev/null','>:encoding(UTF-8)') or
+ die "Unable to open /dev/null for writing: $!";
}
- return IO::File->new('/dev/null','w');
+ return $_NULL_HANDLE;
}
=head2 cleanup_eval_fail()
}
# ditch the "at foo/bar/baz.pm line 5"
$error =~ s/\sat\s\S+\sline\s\d+//;
+ # ditch croak messages
+ $error =~ s/^\t+.+\n?//mg;
# ditch trailing multiple periods in case there was a cascade of
# die messages.
$error =~ s/\.+$/\./;
return $error;
}
+=head2 hash_slice
+
+ hash_slice(%hash,qw(key1 key2 key3))
+
+For each key, returns matching values and keys of the hash if they exist
+
+=cut
+
+
+# NB: We use prototypes here SPECIFICALLY so that we can be passed a
+# hash without uselessly making a reference to first. DO NOT USE
+# PROTOTYPES USELESSLY ELSEWHERE.
+sub hash_slice(\%@) {
+ my ($hashref,@keys) = @_;
+ return map {exists $hashref->{$_}?($_,$hashref->{$_}):()} @keys;
+}
+
1;
projects / debbugs.git / blobdiff