#
# 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;
use vars qw(@ISA @EXPORT %dh);
@ISA=qw(Exporter);
@EXPORT=qw(&init &doit &complex_doit &verbose_print &error &warning &tmpdir
- &pkgfile &pkgext &isnative &autoscript &filearray &GetPackages
- &basename &xargs %dh &compat);
+ &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
+ &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=3;
+my $max_compat=10;
sub init {
- # If DH_OPTIONS is set, prepend it @ARGV.
- if (defined($ENV{DH_OPTIONS})) {
- 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.
+ if (exists $ENV{DH_ALWAYS_EXCLUDE} && length $ENV{DH_ALWAYS_EXCLUDE}) {
+ push @{$dh{EXCLUDE}}, split(":", $ENV{DH_ALWAYS_EXCLUDE});
+ }
+
+ # Generate EXCLUDE_FIND.
+ if ($dh{EXCLUDE}) {
+ $dh{EXCLUDE_FIND}='';
+ foreach (@{$dh{EXCLUDE}}) {
+ my $x=$_;
+ $x=escape_shell($x);
+ $x=~s/\./\\\\./g;
+ $dh{EXCLUDE_FIND}.="-regex .\\*$x.\\* -or ";
+ }
+ $dh{EXCLUDE_FIND}=~s/ -or $//;
+ }
+
# Check to see if DH_VERBOSE environment variable was set, if so,
# make sure verbose is on.
if (defined $ENV{DH_VERBOSE} && $ENV{DH_VERBOSE} ne "") {
}
# Get the name of the main binary package (first one listed in
- # debian/control).
- my @allpackages=GetPackages();
- $dh{MAINPACKAGE}=$allpackages[0];
+ # 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
# This package gets special treatement: files and directories specified on
# the command line may affect it.
$dh{FIRSTPACKAGE}=${$dh{DOPACKAGES}}[0];
+
+ # If no error handling function was specified, just propigate
+ # errors out.
+ if (! exists $dh{ERROR_HANDLER} || ! defined $dh{ERROR_HANDLER}) {
+ $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
# be run by exec(). It turns that into a line like you might enter at the
-# shell, escaping metacharacters and quoting qrguments that contain spaces.
+# shell, escaping metacharacters and quoting arguments that contain spaces.
sub escape_shell {
my @args=@_;
my $line="";
if ($word=~/\s/) {
# Escape only a few things since it will be quoted.
# Note we use double quotes because you cannot
- # escape ' in qingle quotes, while " can be escaped
+ # escape ' in single quotes, while " can be escaped
# in double.
# This does make -V"foo bar" turn into "-Vfoo bar",
# but that will be parsed identically by the shell
# anyway..
- $word=~s/([\n`\$"\\])/\$1/g;
+ $word=~s/([\n`\$"\\])/\\$1/g;
push @ret, "\"$word\"";
}
else {
verbose_print(escape_shell(@_));
if (! $dh{NO_ACT}) {
- system(@_) == 0 || error("command returned error code");
+ system(@_) == 0 || _error_exitcode(join(" ", @_));
}
}
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
# 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.
}
}
-# 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.
# Returns the basename of the argument passed to it.
sub basename {
my $fn=shift;
-
+
+ $fn=~s/\/$//g; # ignore trailing slashes
$fn=~s:^.*/(.*?)$:$1:;
return $fn;
}
sub dirname {
my $fn=shift;
+ $fn=~s/\/$//g; # ignore trailing slashes
$fn=~s:^(.*)/.*?$:$1:;
return $fn;
}
# Pass in a number, will return true iff the current compatibility level
# is less than or equal to that number.
-sub compat {
- my $num=shift;
+{
+ my $warned_compat=0;
+ my $c;
+
+ sub compat {
+ my $num=shift;
+ my $nowarn=shift;
- my $c=1;
- if (defined $ENV{DH_COMPAT}) {
- $c=$ENV{DH_COMPAT};
- }
+ if (! defined $c) {
+ $c=1;
+ 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")
+ 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 ($c > $max_compat) {
- error("Sorry, but $max_compat is the highest compatibility level of debhelper currently supported.");
- }
+ if (defined $ENV{DH_COMPAT}) {
+ $c=$ENV{DH_COMPAT};
+ }
+ }
- return ($c <= $num);
+ if ($c <= 4 && ! $warned_compat && ! $nowarn) {
+ warning("Compatibility levels before 5 are deprecated (level $c in use)");
+ $warned_compat=1;
+ }
+
+ if ($c > $max_compat) {
+ error("Sorry, but $max_compat is the highest compatibility level supported by this debhelper.");
+ }
+
+ return ($c <= $num);
+ }
}
# Pass it a name of a binary package, it returns the name of the tmp dir to
#
# It tries several filenames:
# * debian/package.filename.buildarch
+# * debian/package.filename.buildos
# * debian/package.filename
-# * debian/file (if the package is the main package)
+# * 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 $filename=shift;
- if (-f "debian/$package.$filename.".buildarch()) {
- return "debian/$package.$filename.".buildarch();
+ if (defined $dh{NAME}) {
+ $filename="$dh{NAME}.$filename";
}
- elsif (-f "debian/$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
-# in debian for this package.
+# in debian/ for this package.
sub pkgext {
my $package=shift;
return "$package.";
}
+# Pass it the name of a binary package, it returns the name to install
+# files by in eg, etc. Normally this is the same, but --name can override
+# it.
+sub pkgfilename {
+ my $package=shift;
+
+ if (defined $dh{NAME}) {
+ return $dh{NAME};
+ }
+ return $package;
+}
+
# Returns 1 if the package is a native debian package, null otherwise.
# As a side effect, sets $dh{VERSION} to the version of this package.
{
# 1: package
# 2: script to add to
# 3: filename of snippet
-# 4: sed to run on the snippet. Ie, s/#PACKAGE#/$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.
}
}
- 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");
+ }
}
-# Reads in the specified file, one word at a time, and returns an array of
-# the result. If a value is passed in as the second parameter, then glob
+# Removes a whole substvar line.
+sub delsubstvar {
+ my $package=shift;
+ my $substvar=shift;
+
+ my $ext=pkgext($package);
+ my $substvarfile="debian/${ext}substvars";
+
+ if (-e $substvarfile) {
+ complex_doit("grep -s -v '^${substvar}=' $substvarfile > $substvarfile.new || true");
+ doit("mv", "$substvarfile.new","$substvarfile");
+ }
+}
+
+# Adds a dependency on some package to the specified
+# substvar in a package's substvar's file.
+sub addsubstvar {
+ my $package=shift;
+ my $substvar=shift;
+ my $deppackage=shift;
+ my $verinfo=shift;
+ my $remove=shift;
+
+ my $ext=pkgext($package);
+ my $substvarfile="debian/${ext}substvars";
+ my $str=$deppackage;
+ $str.=" ($verinfo)" if defined $verinfo && length $verinfo;
+
+ # Figure out what the line will look like, based on what's there
+ # now, and what we're to add or remove.
+ my $line="";
+ if (-e $substvarfile) {
+ my %items;
+ open(SUBSTVARS_IN, "$substvarfile") || error "read $substvarfile: $!";
+ while (<SUBSTVARS_IN>) {
+ chomp;
+ if (/^\Q$substvar\E=(.*)/) {
+ %items = map { $_ => 1} split(", ", $1);
+
+ last;
+ }
+ }
+ close SUBSTVARS_IN;
+ if (! $remove) {
+ $items{$str}=1;
+ }
+ else {
+ delete $items{$str};
+ }
+ $line=join(", ", sort keys %items);
+ }
+ elsif (! $remove) {
+ $line=$str;
+ }
+
+ if (length $line) {
+ complex_doit("(grep -s -v ${substvar} $substvarfile; echo ".escape_shell("${substvar}=$line").") > $substvarfile.new");
+ doit("mv", "$substvarfile.new", $substvarfile);
+ }
+ else {
+ delsubstvar($package,$substvar);
+ }
+}
+
+# Reads in the specified file, one line at a time. splits on words,
+# and returns an array of arrays of the contents.
+# If a value is passed in as the second parameter, then glob
# expansion is done in the directory specified by the parameter ("." is
# frequently a good choice).
-sub filearray {
+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) && ! $x) {
+ next if /^#/ || /^$/;
+ }
+ my @line;
# Only do glob expansion in v3 mode.
#
# 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 @ret, $_;
+ push @line, $_;
}
}
else {
- push @ret, split;
+ @line = split;
}
+ push @ret, [@line];
}
- close DH_FARRAY_IN;
+
+ close DH_FARRAY_IN || error("problem reading $file: $!");
return @ret;
}
-# Returns the build architecture. (Memoized)
+# Reads in the specified file, one word at a time, and returns an array of
+# the result. Can do globbing as does filedoublearray.
+sub filearray {
+ return map { @$_ } filedoublearray(@_);
+}
+
+# Passed a filename, returns true if -X says that file should be excluded.
+sub excludefile {
+ my $filename = shift;
+ foreach my $f (@{$dh{EXCLUDE}}) {
+ return 1 if $filename =~ /\Q$f\E/;
+ }
+ return 0;
+}
+
{
- 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);
- sub buildarch {
- return $arch if defined $arch;
+ 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;
+ }
+ }
+
+ return 0;
+ }
+}
- $arch=`dpkg --print-architecture` || error($!);
- 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.
-sub GetPackages {
+# As a side effect, populates %package_arches and %package_types with the
+# types of all packages (not only those returned).
+my (%package_types, %package_arches);
+sub getpackages {
my $type=shift;
+
+ %package_types=();
+ %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="";
+ my $package_type;
my @list=();
+ my %seen;
open (CONTROL, 'debian/control') ||
error("cannot read debian/control: $!\n");
while (<CONTROL>) {
s/\s+$//;
if (/^Package:\s*(.*)/) {
$package=$1;
+ # Detect duplicate package names in the same control file.
+ if (! $seen{$package}) {
+ $seen{$package}=1;
+ }
+ else {
+ error("debian/control has a duplicate entry for $package");
+ }
+ $package_type="deb";
}
if (/^Architecture:\s*(.*)/) {
$arch=$1;
}
+ if (/^(?:X[BC]*-)?Package-Type:\s*(.*)/) {
+ $package_type=$1;
+ }
+
if (!$_ or eof) { # end of stanza.
+ if ($package) {
+ $package_types{$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="";
return @list;
}
+# Returns the arch a package will build for.
+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();
+}
+
+# Return true if a given package is really a udeb.
+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';
+}
+
+# Generates the filename that is used for a udeb package.
+sub udeb_filename {
+ my $package=shift;
+
+ my $filearch=package_arch($package);
+ isnative($package); # side effect
+ my $version=$dh{VERSION};
+ $version=~s/^[0-9]+://; # strip any epoch
+ return "${package}_${version}_$filearch.udeb";
+}
+
+# Handles #DEBHELPER# substitution in a script; also can generate a new
+# script from scratch if none exists but there is a .debhelper file for it.
+sub debhelper_script_subst {
+ my $package=shift;
+ my $script=shift;
+
+ my $tmp=tmpdir($package);
+ my $ext=pkgext($package);
+ my $file=pkgfile($package,$script);
+
+ if ($file ne '') {
+ if (-f "debian/$ext$script.debhelper") {
+ # Add this into the script, where it has #DEBHELPER#
+ complex_doit("perl -pe 's~#DEBHELPER#~qx{cat debian/$ext$script.debhelper}~eg' < $file > $tmp/DEBIAN/$script");
+ }
+ else {
+ # Just get rid of any #DEBHELPER# in the script.
+ complex_doit("sed s/#DEBHELPER#// < $file > $tmp/DEBIAN/$script");
+ }
+ doit("chown","0:0","$tmp/DEBIAN/$script");
+ doit("chmod",755,"$tmp/DEBIAN/$script");
+ }
+ elsif ( -f "debian/$ext$script.debhelper" ) {
+ complex_doit("printf '#!/bin/sh\nset -e\n' > $tmp/DEBIAN/$script");
+ complex_doit("cat debian/$ext$script.debhelper >> $tmp/DEBIAN/$script");
+ doit("chown","0:0","$tmp/DEBIAN/$script");
+ doit("chmod",755,"$tmp/DEBIAN/$script");
+ }
+}
+
+# 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;
+ }
+ }
+}
+
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