3 # Library functions for debhelper programs, perl version.
5 # Joey Hess, GPL copyright 1997-2008.
7 package Debian::Debhelper::Dh_Lib;
11 use vars qw(@ISA @EXPORT %dh);
13 @EXPORT=qw(&init &doit &complex_doit &verbose_print &error &warning &tmpdir
14 &pkgfile &pkgext &pkgfilename &isnative &autoscript &filearray
15 &filedoublearray &getpackages &basename &dirname &xargs %dh
16 &compat &addsubstvar &delsubstvar &excludefile &package_arch
17 &is_udeb &udeb_filename &debhelper_script_subst &escape_shell
18 &inhibit_log &load_log &write_log &dpkg_architecture_value
20 &is_make_jobserver_unavailable &clean_jobserver_makeflags);
27 # Check to see if an option line starts with a dash,
28 # or DH_OPTIONS is set.
29 # If so, we need to pass this off to the resource intensive
30 # Getopt::Long, which I'd prefer to avoid loading at all if possible.
31 if ((defined $ENV{DH_OPTIONS} && length $ENV{DH_OPTIONS}) ||
32 (defined $ENV{DH_INTERNAL_OPTIONS} && length $ENV{DH_INTERNAL_OPTIONS}) ||
34 eval "use Debian::Debhelper::Dh_Getopt";
36 Debian::Debhelper::Dh_Getopt::parseopts(%params);
39 # Another way to set excludes.
40 if (exists $ENV{DH_ALWAYS_EXCLUDE} && length $ENV{DH_ALWAYS_EXCLUDE}) {
41 push @{$dh{EXCLUDE}}, split(":", $ENV{DH_ALWAYS_EXCLUDE});
44 # Generate EXCLUDE_FIND.
47 foreach (@{$dh{EXCLUDE}}) {
51 $dh{EXCLUDE_FIND}.="-regex .\\*$x.\\* -or ";
53 $dh{EXCLUDE_FIND}=~s/ -or $//;
56 # Check to see if DH_VERBOSE environment variable was set, if so,
57 # make sure verbose is on.
58 if (defined $ENV{DH_VERBOSE} && $ENV{DH_VERBOSE} ne "") {
62 # Check to see if DH_NO_ACT environment variable was set, if so,
63 # make sure no act mode is on.
64 if (defined $ENV{DH_NO_ACT} && $ENV{DH_NO_ACT} ne "") {
68 # Get the name of the main binary package (first one listed in
69 # debian/control). Only if the main package was not set on the
71 if (! exists $dh{MAINPACKAGE} || ! defined $dh{MAINPACKAGE}) {
72 my @allpackages=getpackages();
73 $dh{MAINPACKAGE}=$allpackages[0];
76 # Check if packages to build have been specified, if not, fall back to
77 # the default, building all relevant packages.
78 if (! defined $dh{DOPACKAGES} || ! @{$dh{DOPACKAGES}}) {
79 push @{$dh{DOPACKAGES}}, getpackages('both');
82 # Check to see if -P was specified. If so, we can only act on a single
84 if ($dh{TMPDIR} && $#{$dh{DOPACKAGES}} > 0) {
85 error("-P was specified, but multiple packages would be acted on (".join(",",@{$dh{DOPACKAGES}}).").");
88 # Figure out which package is the first one we were instructed to build.
89 # This package gets special treatement: files and directories specified on
90 # the command line may affect it.
91 $dh{FIRSTPACKAGE}=${$dh{DOPACKAGES}}[0];
93 # If no error handling function was specified, just propigate
95 if (! exists $dh{ERROR_HANDLER} || ! defined $dh{ERROR_HANDLER}) {
96 $dh{ERROR_HANDLER}='exit \$?';
100 # Run at exit. Add the command to the log files for the packages it acted
101 # on, if it's exiting successfully.
104 if ($? == 0 && $write_log) {
105 write_log(basename($0), @{$dh{DOPACKAGES}});
110 my ($package, $db)=@_;
111 my $ext=pkgext($package);
114 open(LOG, "<", "debian/${ext}debhelper.log") || return;
118 $db->{$package}{$_}=1 if defined $db;
128 foreach my $package (@packages) {
129 my $ext=pkgext($package);
130 my $log="debian/${ext}debhelper.log";
131 open(LOG, ">>", $log) || error("failed to write to ${log}: $!");
141 # Pass it an array containing the arguments of a shell command like would
142 # be run by exec(). It turns that into a line like you might enter at the
143 # shell, escaping metacharacters and quoting arguments that contain spaces.
148 foreach my $word (@args) {
150 # Escape only a few things since it will be quoted.
151 # Note we use double quotes because you cannot
152 # escape ' in single quotes, while " can be escaped
154 # This does make -V"foo bar" turn into "-Vfoo bar",
155 # but that will be parsed identically by the shell
157 $word=~s/([\n`\$"\\])/\\$1/g;
158 push @ret, "\"$word\"";
161 # This list is from _Unix in a Nutshell_. (except '#')
162 $word=~s/([\s!"\$()*+#;<>?@\[\]\\`|~])/\\$1/g;
166 return join(' ', @ret);
169 # Run a command, and display the command to stdout if verbose mode is on.
170 # All commands that modifiy files in $TMP should be ran via this
173 # Note that this cannot handle complex commands, especially anything
174 # involving redirection. Use complex_doit instead.
176 verbose_print(escape_shell(@_));
179 system(@_) == 0 || _error_exitcode(join(" ", @_));
183 # Run a command and display the command to stdout if verbose mode is on.
184 # Use doit() if you can, instead of this function, because this function
185 # forks a shell. However, this function can handle more complicated stuff
188 verbose_print(join(" ",@_));
191 # The join makes system get a scalar so it forks off a shell.
192 system(join(" ", @_)) == 0 || _error_exitcode(join(" ", @_))
196 sub _error_exitcode {
199 error("$command failed to to execute: $!");
202 error("$command died with signal ".($? & 127));
205 error("$command returned exit code ".($? >> 8));
209 # Run a command that may have a huge number of arguments, like xargs does.
210 # Pass in a reference to an array containing the arguments, and then other
211 # parameters that are the command and any parameters that should be passed to
216 # The kernel can accept command lines up to 20k worth of characters.
217 my $command_max=20000; # LINUX SPECIFIC!!
218 # (And obsolete; it's bigger now.)
219 # I could use POSIX::ARG_MAX, but that would be slow.
221 # Figure out length of static portion of command.
224 $static_length+=length($_)+1;
228 my $length=$static_length;
230 if (length($_) + 1 + $static_length > $command_max) {
231 error("This command is greater than the maximum command size allowed by the kernel, and cannot be split up further. What on earth are you doing? \"@_ $_\"");
233 $length+=length($_) + 1;
234 if ($length < $command_max) {
238 doit(@_,@collect) if $#collect > -1;
240 $length=$static_length + length($_) + 1;
243 doit(@_,@collect) if $#collect > -1;
246 # Print something if the verbose flag is on.
251 print "\t$message\n";
255 # Output an error message and die (can be caught).
259 die basename($0).": $message\n";
266 print STDERR basename($0).": $message\n";
269 # Returns the basename of the argument passed to it.
273 $fn=~s/\/$//g; # ignore trailing slashes
274 $fn=~s:^.*/(.*?)$:$1:;
278 # Returns the directory name of the argument passed to it.
282 $fn=~s/\/$//g; # ignore trailing slashes
283 $fn=~s:^(.*)/.*?$:$1:;
287 # Pass in a number, will return true iff the current compatibility level
288 # is less than or equal to that number.
298 if (defined $ENV{DH_COMPAT}) {
301 elsif (-e 'debian/compat') {
303 open (COMPAT_IN, "debian/compat") || error "debian/compat: $!";
306 if (! defined $l || ! length $l) {
307 warning("debian/compat is empty, assuming level $c");
316 if ($c <= 4 && ! $warned_compat) {
317 warning("Compatibility levels before 5 are deprecated.");
321 if ($c > $max_compat) {
322 error("Sorry, but $max_compat is the highest compatibility level supported by this debhelper.");
329 # Pass it a name of a binary package, it returns the name of the tmp dir to
330 # use, for that package.
337 elsif (compat(1) && $package eq $dh{MAINPACKAGE}) {
338 # This is for back-compatibility with the debian/tmp tradition.
342 return "debian/$package";
346 # Pass this the name of a binary package, and the name of the file wanted
347 # for the package, and it will return the actual existing filename to use.
349 # It tries several filenames:
350 # * debian/package.filename.buildarch
351 # * debian/package.filename.buildos
352 # * debian/package.filename
353 # * debian/filename (if the package is the main package)
354 # If --name was specified then the files
355 # must have the name after the package name:
356 # * debian/package.name.filename.buildarch
357 # * debian/package.name.filename.buildos
358 # * debian/package.name.filename
359 # * debian/name.filename (if the package is the main package)
364 if (defined $dh{NAME}) {
365 $filename="$dh{NAME}.$filename";
368 # First, check for files ending in buildarch and buildos.
370 foreach my $file (glob("debian/$package.$filename.*")) {
372 next if $dh{IGNORE} && exists $dh{IGNORE}->{$file};
373 if ($file eq "debian/$package.$filename.".buildarch()) {
375 # buildarch files are used in preference to buildos files.
378 elsif ($file eq "debian/$package.$filename.".buildos()) {
382 return $match if defined $match;
384 my @try=("debian/$package.$filename");
385 if ($package eq $dh{MAINPACKAGE}) {
386 push @try, "debian/$filename";
389 foreach my $file (@try) {
391 (! $dh{IGNORE} || ! exists $dh{IGNORE}->{$file})) {
401 # Pass it a name of a binary package, it returns the name to prefix to files
402 # in debian/ for this package.
406 if (compat(1) and $package eq $dh{MAINPACKAGE}) {
412 # Pass it the name of a binary package, it returns the name to install
413 # files by in eg, etc. Normally this is the same, but --name can override
418 if (defined $dh{NAME}) {
424 # Returns 1 if the package is a native debian package, null otherwise.
425 # As a side effect, sets $dh{VERSION} to the version of this package.
427 # Caches return code so it only needs to run dpkg-parsechangelog once.
433 return $isnative_cache{$package} if defined $isnative_cache{$package};
435 # Make sure we look at the correct changelog.
436 my $isnative_changelog=pkgfile($package,"changelog");
437 if (! $isnative_changelog) {
438 $isnative_changelog="debian/changelog";
440 # Get the package version.
441 my $version=`dpkg-parsechangelog -l$isnative_changelog`;
442 ($dh{VERSION})=$version=~m/Version:\s*(.*)/m;
443 # Did the changelog parse fail?
444 if (! defined $dh{VERSION}) {
445 error("changelog parse failure");
448 # Is this a native Debian package?
449 if ($dh{VERSION}=~m/.*-/) {
450 return $isnative_cache{$package}=0;
453 return $isnative_cache{$package}=1;
458 # Automatically add a shell script snippet to a debian script.
459 # Only works if the script has #DEBHELPER# in it.
463 # 2: script to add to
464 # 3: filename of snippet
465 # 4: sed to run on the snippet. Ie, s/#PACKAGE#/$PACKAGE/
472 # This is the file we will modify.
473 my $outfile="debian/".pkgext($package)."$script.debhelper";
475 # Figure out what shell script snippet to use.
477 if (defined($ENV{DH_AUTOSCRIPTDIR}) &&
478 -e "$ENV{DH_AUTOSCRIPTDIR}/$filename") {
479 $infile="$ENV{DH_AUTOSCRIPTDIR}/$filename";
482 if (-e "/usr/share/debhelper/autoscripts/$filename") {
483 $infile="/usr/share/debhelper/autoscripts/$filename";
486 error("/usr/share/debhelper/autoscripts/$filename does not exist");
490 if (-e $outfile && ($script eq 'postrm' || $script eq 'prerm')
492 # Add fragments to top so they run in reverse order when removing.
493 complex_doit("echo \"# Automatically added by ".basename($0)."\"> $outfile.new");
494 complex_doit("sed \"$sed\" $infile >> $outfile.new");
495 complex_doit("echo '# End automatically added section' >> $outfile.new");
496 complex_doit("cat $outfile >> $outfile.new");
497 complex_doit("mv $outfile.new $outfile");
500 complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
501 complex_doit("sed \"$sed\" $infile >> $outfile");
502 complex_doit("echo '# End automatically added section' >> $outfile");
506 # Removes a whole substvar line.
511 my $ext=pkgext($package);
512 my $substvarfile="debian/${ext}substvars";
514 if (-e $substvarfile) {
515 complex_doit("grep -s -v '^${substvar}=' $substvarfile > $substvarfile.new || true");
516 doit("mv", "$substvarfile.new","$substvarfile");
520 # Adds a dependency on some package to the specified
521 # substvar in a package's substvar's file.
525 my $deppackage=shift;
529 my $ext=pkgext($package);
530 my $substvarfile="debian/${ext}substvars";
532 $str.=" ($verinfo)" if defined $verinfo && length $verinfo;
534 # Figure out what the line will look like, based on what's there
535 # now, and what we're to add or remove.
537 if (-e $substvarfile) {
539 open(SUBSTVARS_IN, "$substvarfile") || error "read $substvarfile: $!";
540 while (<SUBSTVARS_IN>) {
542 if (/^\Q$substvar\E=(.*)/) {
543 %items = map { $_ => 1} split(", ", $1);
555 $line=join(", ", sort keys %items);
562 complex_doit("(grep -s -v ${substvar} $substvarfile; echo ".escape_shell("${substvar}=$line").") > $substvarfile.new");
563 doit("mv", "$substvarfile.new", $substvarfile);
566 delsubstvar($package,$substvar);
570 # Reads in the specified file, one line at a time. splits on words,
571 # and returns an array of arrays of the contents.
572 # If a value is passed in as the second parameter, then glob
573 # expansion is done in the directory specified by the parameter ("." is
574 # frequently a good choice).
575 sub filedoublearray {
580 open (DH_FARRAY_IN, $file) || error("cannot read $file: $1");
581 while (<DH_FARRAY_IN>) {
583 # Only ignore comments and empty lines in v5 mode.
585 next if /^#/ || /^$/;
588 # Only do glob expansion in v3 mode.
590 # The tricky bit is that the glob expansion is done
591 # as if we were in the specified directory, so the
592 # filenames that come out are relative to it.
593 if (defined $globdir && ! compat(2)) {
594 foreach (map { glob "$globdir/$_" } split) {
609 # Reads in the specified file, one word at a time, and returns an array of
610 # the result. Can do globbing as does filedoublearray.
612 return map { @$_ } filedoublearray(@_);
615 # Passed a filename, returns true if -X says that file should be excluded.
617 my $filename = shift;
618 foreach my $f (@{$dh{EXCLUDE}}) {
619 return 1 if $filename =~ /\Q$f\E/;
625 my %dpkg_arch_output;
626 sub dpkg_architecture_value {
628 if (! exists($dpkg_arch_output{$var})) {
630 open(PIPE, '-|', 'dpkg-architecture')
631 or error("dpkg-architecture failed");
634 my ($k, $v) = split(/=/, $_, 2);
635 $dpkg_arch_output{$k} = $v;
639 return $dpkg_arch_output{$var};
643 # Returns the build architecture.
645 dpkg_architecture_value('DEB_HOST_ARCH');
648 # Returns the build OS.
650 dpkg_architecture_value("DEB_HOST_ARCH_OS");
653 # Passed an arch and a list of arches to match against, returns true if matched
659 my @archlist=split(/\s+/,shift);
661 foreach my $a (@archlist) {
662 # Avoid expensive dpkg-architecture call to compare
663 # with a simple architecture name. "linux-any" and
664 # other architecture wildcards are (currently)
667 return 1 if $arch eq $a;
669 elsif (exists $knownsame{$arch}{$a}) {
670 return 1 if $knownsame{$arch}{$a};
672 elsif (system("dpkg-architecture", "-a$arch", "-i$a") == 0) {
673 return $knownsame{$arch}{$a}=1;
676 $knownsame{$arch}{$a}=0;
684 # Returns source package name
686 open (CONTROL, 'debian/control') ||
687 error("cannot read debian/control: $!\n");
691 if (/^Source:\s*(.*)/) {
698 error("could not find Source: line in control file.");
701 # Returns a list of packages in the control file.
702 # Pass "arch" or "indep" to specify arch-dependant (that will be built
703 # for the system's arch) or independant. If nothing is specified,
704 # returns all packages. Also, "both" returns the union of "arch" and "indep"
706 # As a side effect, populates %package_arches and %package_types with the
707 # types of all packages (not only those returned).
708 my (%package_types, %package_arches);
715 $type="" if ! defined $type;
722 open (CONTROL, 'debian/control') ||
723 error("cannot read debian/control: $!\n");
727 if (/^Package:\s*(.*)/) {
729 # Detect duplicate package names in the same control file.
730 if (! $seen{$package}) {
734 error("debian/control has a duplicate entry for $package");
738 if (/^Architecture:\s*(.*)/) {
741 if (/^(?:X[BC]*-)?Package-Type:\s*(.*)/) {
745 if (!$_ or eof) { # end of stanza.
747 $package_types{$package}=$package_type;
748 $package_arches{$package}=$arch;
752 ((($type eq 'indep' || $type eq 'both') && $arch eq 'all') ||
753 (($type eq 'arch' || $type eq 'both') && ($arch eq 'any' ||
755 samearch(buildarch(), $arch)))) ||
757 push @list, $package;
768 # Returns the arch a package will build for.
772 if (! exists $package_arches{$package}) {
773 warning "package $package is not in control info";
776 return $package_arches{$package} eq 'all' ? "all" : buildarch();
779 # Return true if a given package is really a udeb.
783 if (! exists $package_types{$package}) {
784 warning "package $package is not in control info";
787 return $package_types{$package} eq 'udeb';
790 # Generates the filename that is used for a udeb package.
794 my $filearch=package_arch($package);
795 isnative($package); # side effect
796 my $version=$dh{VERSION};
797 $version=~s/^[0-9]+://; # strip any epoch
798 return "${package}_${version}_$filearch.udeb";
801 # Handles #DEBHELPER# substitution in a script; also can generate a new
802 # script from scratch if none exists but there is a .debhelper file for it.
803 sub debhelper_script_subst {
807 my $tmp=tmpdir($package);
808 my $ext=pkgext($package);
809 my $file=pkgfile($package,$script);
812 if (-f "debian/$ext$script.debhelper") {
813 # Add this into the script, where it has #DEBHELPER#
814 complex_doit("perl -pe 's~#DEBHELPER#~qx{cat debian/$ext$script.debhelper}~eg' < $file > $tmp/DEBIAN/$script");
817 # Just get rid of any #DEBHELPER# in the script.
818 complex_doit("sed s/#DEBHELPER#// < $file > $tmp/DEBIAN/$script");
820 doit("chown","0:0","$tmp/DEBIAN/$script");
821 doit("chmod",755,"$tmp/DEBIAN/$script");
823 elsif ( -f "debian/$ext$script.debhelper" ) {
824 complex_doit("printf '#!/bin/sh\nset -e\n' > $tmp/DEBIAN/$script");
825 complex_doit("cat debian/$ext$script.debhelper >> $tmp/DEBIAN/$script");
826 doit("chown","0:0","$tmp/DEBIAN/$script");
827 doit("chmod",755,"$tmp/DEBIAN/$script");
831 # Checks if make's jobserver is enabled via MAKEFLAGS, but
832 # the FD used to communicate with it is actually not available.
833 sub is_make_jobserver_unavailable {
834 if (exists $ENV{MAKEFLAGS} &&
835 $ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
836 if (!open(my $in, "<&$1")) {
837 return 1; # unavailable
841 return 0; # available
845 return; # no jobserver specified
848 # Cleans out jobserver options from MAKEFLAGS.
849 sub clean_jobserver_makeflags {
850 if (exists $ENV{MAKEFLAGS}) {
851 if ($ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
852 $ENV{MAKEFLAGS} =~ s/(?:^|\s)--jobserver-fds=\S+//g;
853 $ENV{MAKEFLAGS} =~ s/(?:^|\s)-j\b//g;
855 delete $ENV{MAKEFLAGS} if $ENV{MAKEFLAGS} =~ /^\s*$/;