X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=Debian%2FDebhelper%2FDh_Lib.pm;h=c83e42b266aa20f64284399c65610f0604100ca1;hb=a3494762925e5a42a42ce82c688f62f163ffad1b;hp=f1b39226be061c4e7fa86475202f0885138b4e21;hpb=0b49e3bc664a3d10b3a54359b8aa4b8d5e505eb2;p=debhelper.git

diff --git a/Debian/Debhelper/Dh_Lib.pm b/Debian/Debhelper/Dh_Lib.pm
index f1b3922..7b550b0 100644
--- a/Debian/Debhelper/Dh_Lib.pm
+++ b/Debian/Debhelper/Dh_Lib.pm
@@ -2,7 +2,7 @@
 #
 # Library functions for debhelper programs, perl version.
 #
-# Joey Hess, GPL copyright 1997-2000.
+# Joey Hess, GPL copyright 1997-2008.
 
 package Debian::Debhelper::Dh_Lib;
 use strict;
@@ -14,34 +14,27 @@ use vars qw(@ISA @EXPORT %dh);
 	    &pkgfile &pkgext &pkgfilename &isnative &autoscript &filearray
 	    &filedoublearray &getpackages &basename &dirname &xargs %dh
 	    &compat &addsubstvar &delsubstvar &excludefile &package_arch
-	    &is_udeb &udeb_filename &debhelper_script_subst &escape_shell);
+	    &is_udeb &udeb_filename &debhelper_script_subst &escape_shell
+	    &inhibit_log &load_log &write_log &commit_override_log
+	    &dpkg_architecture_value &sourcepackage
+	    &is_make_jobserver_unavailable &clean_jobserver_makeflags
+	    &cross_command &set_buildflags &get_buildoption);
 
-my $max_compat=5;
+my $max_compat=10;
 
 sub init {
-	# If DH_OPTIONS is set, prepend it @ARGV.
-	if (defined($ENV{DH_OPTIONS})) {
-		# Ignore leading/trailing whitespace.
-		$ENV{DH_OPTIONS}=~s/^\s+//;
-		$ENV{DH_OPTIONS}=~s/\s+$//;
-		unshift @ARGV,split(/\s+/,$ENV{DH_OPTIONS});
-	}
+	my %params=@_;
 
-	# Check to see if an argument on the command line starts with a dash.
-	# if so, we need to pass this off to the resource intensive 
+	# Check to see if an option line starts with a dash,
+	# or DH_OPTIONS is set.
+	# If so, we need to pass this off to the resource intensive 
 	# Getopt::Long, which I'd prefer to avoid loading at all if possible.
-	my $parseopt=undef;
-	my $arg;
-	foreach $arg (@ARGV) {
-		if ($arg=~m/^-/) {
-			$parseopt=1;
-			last;
-		}       
-	}
-	if ($parseopt) {
+	if ((defined $ENV{DH_OPTIONS} && length $ENV{DH_OPTIONS}) ||
+ 	    (defined $ENV{DH_INTERNAL_OPTIONS} && length $ENV{DH_INTERNAL_OPTIONS}) ||
+	    grep /^-/, @ARGV) {
 		eval "use Debian::Debhelper::Dh_Getopt";
-		error($!) if $@;
-		%dh=Debian::Debhelper::Dh_Getopt::parseopts();
+		error($@) if $@;
+		Debian::Debhelper::Dh_Getopt::parseopts(%params);
 	}
 
 	# Another way to set excludes.
@@ -55,7 +48,7 @@ sub init {
 		foreach (@{$dh{EXCLUDE}}) {
 			my $x=$_;
 			$x=escape_shell($x);
-			$x=~s/\./\\./g;
+			$x=~s/\./\\\\./g;
 			$dh{EXCLUDE_FIND}.="-regex .\\*$x.\\* -or ";
 		}
 		$dh{EXCLUDE_FIND}=~s/ -or $//;
@@ -73,21 +66,18 @@ sub init {
 		$dh{NO_ACT}=1;
 	}
 
-	my @allpackages=getpackages();
 	# Get the name of the main binary package (first one listed in
 	# debian/control). Only if the main package was not set on the
 	# command line.
 	if (! exists $dh{MAINPACKAGE} || ! defined $dh{MAINPACKAGE}) {
+		my @allpackages=getpackages();
 		$dh{MAINPACKAGE}=$allpackages[0];
 	}
 
 	# Check if packages to build have been specified, if not, fall back to
-	# the default, doing them all.
+	# the default, building all relevant packages.
 	if (! defined $dh{DOPACKAGES} || ! @{$dh{DOPACKAGES}}) {
-		if ($dh{DOINDEP} || $dh{DOARCH} || $dh{DOSAME}) {
-			error("You asked that all arch in(dep) packages be built, but there are none of that type.");
-		}
-		push @{$dh{DOPACKAGES}},@allpackages;
+		push @{$dh{DOPACKAGES}}, getpackages('both');
 	}
 
 	# Check to see if -P was specified. If so, we can only act on a single
@@ -104,8 +94,84 @@ sub init {
 	# If no error handling function was specified, just propigate
 	# errors out.
 	if (! exists $dh{ERROR_HANDLER} || ! defined $dh{ERROR_HANDLER}) {
-		$dh{ERROR_HANDLER}='exit $?';
+		$dh{ERROR_HANDLER}='exit \$?';
+	}
+}
+
+# Run at exit. Add the command to the log files for the packages it acted
+# on, if it's exiting successfully.
+my $write_log=1;
+sub END {
+	if ($? == 0 && $write_log) {
+		write_log(basename($0), @{$dh{DOPACKAGES}});
+	}
+}
+
+sub logfile {
+	my $package=shift;
+	my $ext=pkgext($package);
+	return "debian/${ext}debhelper.log"
+}
+
+sub add_override {
+	my $line=shift;
+	$line="override_$ENV{DH_INTERNAL_OVERRIDE} $line"
+		if defined $ENV{DH_INTERNAL_OVERRIDE};
+	return $line;
+}
+
+sub remove_override {
+	my $line=shift;
+	$line=~s/^\Qoverride_$ENV{DH_INTERNAL_OVERRIDE}\E\s+//
+		if defined $ENV{DH_INTERNAL_OVERRIDE};
+	return $line;
+}
+
+sub load_log {
+	my ($package, $db)=@_;
+
+	my @log;
+	open(LOG, "<", logfile($package)) || return;
+	while (<LOG>) {
+		chomp;
+		my $command=remove_override($_);
+		push @log, $command;
+		$db->{$package}{$command}=1 if defined $db;
 	}
+	close LOG;
+	return @log;
+}
+
+sub write_log {
+	my $cmd=shift;
+	my @packages=@_;
+
+	return if $dh{NO_ACT};
+
+	foreach my $package (@packages) {
+		my $log=logfile($package);
+		open(LOG, ">>", $log) || error("failed to write to ${log}: $!");
+		print LOG add_override($cmd)."\n";
+		close LOG;
+	}
+}
+
+sub commit_override_log {
+	my @packages=@_;
+
+	return if $dh{NO_ACT};
+
+	foreach my $package (@packages) {
+		my @log=map { remove_override($_) } load_log($package);
+		my $log=logfile($package);
+		open(LOG, ">", $log) || error("failed to write to ${log}: $!");
+		print LOG $_."\n" foreach @log;
+		close LOG;
+	}
+}
+
+sub inhibit_log {
+	$write_log=0;
 }
 
 # Pass it an array containing the arguments of a shell command like would
@@ -146,8 +212,7 @@ sub doit {
 	verbose_print(escape_shell(@_));
 
 	if (! $dh{NO_ACT}) {
-		my $ret=system(@_);
-		$ret == 0 || error("command returned error code $ret");
+		system(@_) == 0 || _error_exitcode(join(" ", @_));
 	}
 }
 
@@ -160,11 +225,23 @@ sub complex_doit {
 	
 	if (! $dh{NO_ACT}) {
 		# The join makes system get a scalar so it forks off a shell.
-		system(join(" ",@_)) == 0
-			|| error("command returned error code");
+		system(join(" ", @_)) == 0 || _error_exitcode(join(" ", @_))
 	}			
 }
 
+sub _error_exitcode {
+	my $command=shift;
+	if ($? == -1) {
+		error("$command failed to to execute: $!");
+	}
+	elsif ($? & 127) {
+		error("$command died with signal ".($? & 127));
+        }
+	else {
+		error("$command returned exit code ".($? >> 8));
+	}
+}
+
 # Run a command that may have a huge number of arguments, like xargs does.
 # Pass in a reference to an array containing the arguments, and then other
 # parameters that are the command and any parameters that should be passed to
@@ -174,6 +251,7 @@ sub xargs {
 
         # The kernel can accept command lines up to 20k worth of characters.
 	my $command_max=20000; # LINUX SPECIFIC!!
+			# (And obsolete; it's bigger now.)
 			# I could use POSIX::ARG_MAX, but that would be slow.
 
 	# Figure out length of static portion of command.
@@ -210,12 +288,11 @@ sub verbose_print {
 	}
 }
 
-# Output an error message and exit.
+# Output an error message and die (can be caught).
 sub error {
 	my $message=shift;
 
-	warning($message);
-	exit 1;
+	die basename($0).": $message\n";
 }
 
 # Output a warning.
@@ -251,28 +328,35 @@ sub dirname {
 
 	sub compat {
 		my $num=shift;
+		my $nowarn=shift;
 	
 		if (! defined $c) {
 			$c=1;
-			if (defined $ENV{DH_COMPAT}) {
-				$c=$ENV{DH_COMPAT};
-			}
-			elsif (-e 'debian/compat') {
-				# Try the file..
+			if (-e 'debian/compat') {
 				open (COMPAT_IN, "debian/compat") || error "debian/compat: $!";
 				my $l=<COMPAT_IN>;
+				close COMPAT_IN;
 				if (! defined $l || ! length $l) {
-					warning("debian/compat is empty, assuming level $c");
+					warning("debian/compat is empty, assuming level $c")
+						unless defined $ENV{DH_COMPAT};
 				}
 				else {
 					chomp $l;
 					$c=$l;
 				}
 			}
+			else {
+				warning("No compatibility level specified in debian/compat");
+				warning("This package will soon FTBFS; time to fix it!");
+			}
+
+			if (defined $ENV{DH_COMPAT}) {
+				$c=$ENV{DH_COMPAT};
+			}
 		}
 
-		if ($c < 4 && ! $warned_compat) {
-			warning("Compatibility levels before 4 are deprecated.");
+		if ($c <= 4 && ! $warned_compat && ! $nowarn) {
+			warning("Compatibility levels before 5 are deprecated (level $c in use)");
 			$warned_compat=1;
 		}
 	
@@ -306,12 +390,15 @@ sub tmpdir {
 #
 # It tries several filenames:
 #   * debian/package.filename.buildarch
+#   * debian/package.filename.buildos
 #   * debian/package.filename
-#   * debian/file (if the package is the main package)
-# If --name was specified then tonly the first two are tried, and they must
-# have the name after the pacage name:
+#   * debian/filename (if the package is the main package)
+# If --name was specified then the files
+# must have the name after the package name:
 #   * debian/package.name.filename.buildarch
+#   * debian/package.name.filename.buildos
 #   * debian/package.name.filename
+#   * debian/name.filename (if the package is the main package)
 sub pkgfile {
 	my $package=shift;
 	my $filename=shift;
@@ -320,18 +407,37 @@ sub pkgfile {
 		$filename="$dh{NAME}.$filename";
 	}
 	
-	if (-f "debian/$package.$filename.".buildarch()) {
-		return "debian/$package.$filename.".buildarch();
-	}
-	elsif (-f "debian/$package.$filename") {
-		return "debian/$package.$filename";
+	# First, check for files ending in buildarch and buildos.
+	my $match;
+	foreach my $file (glob("debian/$package.$filename.*")) {
+		next if ! -f $file;
+		next if $dh{IGNORE} && exists $dh{IGNORE}->{$file};
+		if ($file eq "debian/$package.$filename.".buildarch()) {
+			$match=$file;
+			# buildarch files are used in preference to buildos files.
+			last;
+		}
+		elsif ($file eq "debian/$package.$filename.".buildos()) {
+			$match=$file;
+		}
 	}
-	elsif ($package eq $dh{MAINPACKAGE} && -f "debian/$filename") {
-		return "debian/$filename";
+	return $match if defined $match;
+
+	my @try=("debian/$package.$filename");
+	if ($package eq $dh{MAINPACKAGE}) {
+		push @try, "debian/$filename";
 	}
-	else {
-		return "";
+	
+	foreach my $file (@try) {
+		if (-f $file &&
+		    (! $dh{IGNORE} || ! exists $dh{IGNORE}->{$file})) {
+			return $file;
+		}
+
 	}
+
+	return "";
+
 }
 
 # Pass it a name of a binary package, it returns the name to prefix to files
@@ -398,14 +504,15 @@ sub pkgfilename {
 # 1: package
 # 2: script to add to
 # 3: filename of snippet
-# 4: sed to run on the snippet. Ie, s/#PACKAGE#/$PACKAGE/
+# 4: either text: shell-quoted sed to run on the snippet. Ie, 's/#PACKAGE#/$PACKAGE/'
+#    or a sub to run on each line of the snippet. Ie sub { s/#PACKAGE#/$PACKAGE/ }
 sub autoscript {
 	my $package=shift;
 	my $script=shift;
 	my $filename=shift;
 	my $sed=shift || "";
 
-	# This is the file we will append to.
+	# This is the file we will modify.
 	my $outfile="debian/".pkgext($package)."$script.debhelper";
 
 	# Figure out what shell script snippet to use.
@@ -423,9 +530,36 @@ sub autoscript {
 		}
 	}
 
-	complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
-	complex_doit("sed \"$sed\" $infile >> $outfile");
-	complex_doit("echo '# End automatically added section' >> $outfile");
+	if (-e $outfile && ($script eq 'postrm' || $script eq 'prerm')
+	   && !compat(5)) {
+		# Add fragments to top so they run in reverse order when removing.
+		complex_doit("echo \"# Automatically added by ".basename($0)."\"> $outfile.new");
+		autoscript_sed($sed, $infile, "$outfile.new");
+		complex_doit("echo '# End automatically added section' >> $outfile.new");
+		complex_doit("cat $outfile >> $outfile.new");
+		complex_doit("mv $outfile.new $outfile");
+	}
+	else {
+		complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
+		autoscript_sed($sed, $infile, $outfile);
+		complex_doit("echo '# End automatically added section' >> $outfile");
+	}
+}
+
+sub autoscript_sed {
+	my $sed = shift;
+	my $infile = shift;
+	my $outfile = shift;
+	if (ref($sed) eq 'CODE') {
+		open(IN, $infile) or die "$infile: $!";
+		open(OUT, ">>$outfile") or die "$outfile: $!";
+		while (<IN>) { $sed->(); print OUT }
+		close(OUT) or die "$outfile: $!";
+		close(IN) or die "$infile: $!";
+	}
+	else {
+		complex_doit("sed \"$sed\" $infile >> $outfile");
+	}
 }
 
 # Removes a whole substvar line.
@@ -477,7 +611,7 @@ sub addsubstvar {
 		else {
 			delete $items{$str};
 		}
-		$line=join(", ", keys %items);
+		$line=join(", ", sort keys %items);
 	}
 	elsif (! $remove) {
 		$line=$str;
@@ -501,12 +635,22 @@ sub filedoublearray {
 	my $file=shift;
 	my $globdir=shift;
 
+	# executable config files are a v9 thing.
+	my $x=! compat(8) && -x $file;
+	if ($x) {
+		require Cwd;
+		my $cmd=Cwd::abs_path($file);
+		open (DH_FARRAY_IN, "$cmd |") || error("cannot run $file: $!");
+	}
+	else {
+		open (DH_FARRAY_IN, $file) || error("cannot read $file: $!");
+	}
+
 	my @ret;
-	open (DH_FARRAY_IN, $file) || error("cannot read $file: $1");
 	while (<DH_FARRAY_IN>) {
 		chomp;
 		# Only ignore comments and empty lines in v5 mode.
-		if (! compat(4)) {
+		if (! compat(4) && ! $x)  {
 			next if /^#/ || /^$/;
 		}
 		my @line;
@@ -515,8 +659,8 @@ sub filedoublearray {
 		# The tricky bit is that the glob expansion is done
 		# as if we were in the specified directory, so the
 		# filenames that come out are relative to it.
-		if (defined $globdir && ! compat(2)) {
-			for (map { glob "$globdir/$_" } split) {
+		if (defined $globdir && ! compat(2) && ! $x) {
+			foreach (map { glob "$globdir/$_" } split) {
 				s#^$globdir/##;
 				push @line, $_;
 			}
@@ -526,7 +670,8 @@ sub filedoublearray {
 		}
 		push @ret, [@line];
 	}
-	close DH_FARRAY_IN;
+
+	close DH_FARRAY_IN || error("problem reading $file: $!");
 	
 	return @ret;
 }
@@ -546,22 +691,87 @@ sub excludefile {
         return 0;
 }
 
-# Returns the build architecture. (Memoized)
 {
-	my $arch;
+	my %dpkg_arch_output;
+	sub dpkg_architecture_value {
+		my $var = shift;
+		if (! exists($dpkg_arch_output{$var})) {
+			local $_;
+			open(PIPE, '-|', 'dpkg-architecture')
+				or error("dpkg-architecture failed");
+			while (<PIPE>) {
+				chomp;
+				my ($k, $v) = split(/=/, $_, 2);
+				$dpkg_arch_output{$k} = $v;
+			}
+			close(PIPE);
+		}
+		return $dpkg_arch_output{$var};
+	}
+}
+
+# Returns the build architecture.
+sub buildarch {
+	dpkg_architecture_value('DEB_HOST_ARCH');
+}
+
+# Returns the build OS.
+sub buildos {
+	dpkg_architecture_value("DEB_HOST_ARCH_OS");
+}
+
+# Passed an arch and a list of arches to match against, returns true if matched
+{
+	my %knownsame;
+
+	sub samearch {
+		my $arch=shift;
+		my @archlist=split(/\s+/,shift);
+	
+		foreach my $a (@archlist) {
+			# Avoid expensive dpkg-architecture call to compare
+			# with a simple architecture name. "linux-any" and
+			# other architecture wildcards are (currently)
+			# always hypenated.
+			if ($a !~ /-/) {
+				return 1 if $arch eq $a;
+			}
+			elsif (exists $knownsame{$arch}{$a}) {
+				return 1 if $knownsame{$arch}{$a};
+			}
+			elsif (system("dpkg-architecture", "-a$arch", "-i$a") == 0) {
+				return $knownsame{$arch}{$a}=1;
+			}
+			else {
+				$knownsame{$arch}{$a}=0;
+			}
+		}
 	
-	sub buildarch {
-  		return $arch if defined $arch;
+		return 0;
+	}
+}
 
-		$arch=`dpkg-architecture -qDEB_HOST_ARCH 2>/dev/null` || error($!);
-		chomp $arch;
-		return $arch;
+# Returns source package name
+sub sourcepackage {
+	open (CONTROL, 'debian/control') ||
+	    error("cannot read debian/control: $!\n");
+	while (<CONTROL>) {
+		chomp;
+		s/\s+$//;
+		if (/^Source:\s*(.*)/) {
+			close CONTROL;
+			return $1;
+		}
 	}
+
+	close CONTROL;
+	error("could not find Source: line in control file.");
 }
 
 # Returns a list of packages in the control file.
-# Must pass "arch" or "indep" or "same" to specify arch-dependant or
-# -independant or same arch packages. If nothing is specified, returns all
+# Pass "arch" or "indep" to specify arch-dependant (that will be built
+# for the system's arch) or independant. If nothing is specified,
+# returns all packages. Also, "both" returns the union of "arch" and "indep"
 # packages.
 # As a side effect, populates %package_arches and %package_types with the
 # types of all packages (not only those returned).
@@ -573,12 +783,6 @@ sub getpackages {
 	%package_arches=();
 	
 	$type="" if ! defined $type;
-	
-	# Look up the build arch if we need to.
-	my $buildarch='';
-	if ($type eq 'same') {
-		$buildarch=buildarch();
-	}
 
 	my $package="";
 	my $arch="";
@@ -604,7 +808,7 @@ sub getpackages {
 		if (/^Architecture:\s*(.*)/) {
 			$arch=$1;
 		}
-		if (/^X[BC]*-Package-Type:\s*(.*)/) {
+		if (/^(?:X[BC]*-)?Package-Type:\s*(.*)/) {
 			$package_type=$1;
 		}
 		
@@ -613,10 +817,12 @@ sub getpackages {
 				$package_types{$package}=$package_type;
 				$package_arches{$package}=$arch;
 			}
+
 			if ($package &&
-			    (($type eq 'indep' && $arch eq 'all') ||
-			     ($type eq 'arch' && $arch ne 'all') ||
-			     ($type eq 'same' && ($arch eq 'any' || $arch =~ /\b$buildarch\b/)) ||
+			    ((($type eq 'indep' || $type eq 'both') && $arch eq 'all') ||
+			     (($type eq 'arch'  || $type eq 'both') && ($arch eq 'any' ||
+					     ($arch ne 'all' &&
+			                      samearch(buildarch(), $arch)))) ||
 			     ! $type)) {
 				push @list, $package;
 				$package="";
@@ -633,6 +839,10 @@ sub getpackages {
 sub package_arch {
 	my $package=shift;
 	
+	if (! exists $package_arches{$package}) {
+		warning "package $package is not in control info";
+		return buildarch();
+	}
 	return $package_arches{$package} eq 'all' ? "all" : buildarch();
 }
 
@@ -640,6 +850,10 @@ sub package_arch {
 sub is_udeb {
 	my $package=shift;
 	
+	if (! exists $package_types{$package}) {
+		warning "package $package is not in control info";
+		return 0;
+	}
 	return $package_types{$package} eq 'udeb';
 }
 
@@ -684,4 +898,83 @@ sub debhelper_script_subst {
 	}
 }
 
+# Checks if make's jobserver is enabled via MAKEFLAGS, but
+# the FD used to communicate with it is actually not available.
+sub is_make_jobserver_unavailable {
+	if (exists $ENV{MAKEFLAGS} && 
+	    $ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
+		if (!open(my $in, "<&$1")) {
+			return 1; # unavailable
+		}
+		else {
+			close $in;
+			return 0; # available
+		}
+	}
+
+	return; # no jobserver specified
+}
+
+# Cleans out jobserver options from MAKEFLAGS.
+sub clean_jobserver_makeflags {
+	if (exists $ENV{MAKEFLAGS}) {
+		if ($ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
+			$ENV{MAKEFLAGS} =~ s/(?:^|\s)--jobserver-fds=\S+//g;
+			$ENV{MAKEFLAGS} =~ s/(?:^|\s)-j\b//g;
+		}
+		delete $ENV{MAKEFLAGS} if $ENV{MAKEFLAGS} =~ /^\s*$/;
+	}
+}
+
+# If cross-compiling, returns appropriate cross version of command.
+sub cross_command {
+	my $command=shift;
+	if (dpkg_architecture_value("DEB_BUILD_GNU_TYPE")
+	    ne dpkg_architecture_value("DEB_HOST_GNU_TYPE")) {
+		return dpkg_architecture_value("DEB_HOST_GNU_TYPE")."-$command";
+	}
+	else {
+		return $command;
+	}
+}
+
+# Sets environment variables from dpkg-buildflags. Avoids changing
+# any existing environment variables.
+sub set_buildflags {
+	return if $ENV{DH_INTERNAL_BUILDFLAGS} || compat(8);
+	$ENV{DH_INTERNAL_BUILDFLAGS}=1;
+
+	eval "use Dpkg::BuildFlags";
+	if ($@) {
+		warning "unable to load build flags: $@";
+		return;
+	}
+
+	my $buildflags = Dpkg::BuildFlags->new();
+	$buildflags->load_config();
+	foreach my $flag ($buildflags->list()) {
+		next unless $flag =~ /^[A-Z]/; # Skip flags starting with lowercase
+		if (! exists $ENV{$flag}) {
+			$ENV{$flag} = $buildflags->get($flag);
+		}
+	}
+}
+
+# Gets a DEB_BUILD_OPTIONS option, if set.
+sub get_buildoption {
+	my $wanted=shift;
+
+	return undef unless exists $ENV{DEB_BUILD_OPTIONS};
+
+	foreach my $opt (split(/\s+/, $ENV{DEB_BUILD_OPTIONS})) {
+		# currently parallel= is the only one with a parameter
+		if ($opt =~ /^parallel=(-?\d+)$/ && $wanted eq 'parallel') {
+			return $1;
+		}
+		elsif ($opt eq $wanted) {
+			return 1;
+		}
+	}
+}
+
 1