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 return if defined $ENV{DH_INHIBIT_LOG} && $cmd eq $ENV{DH_INHIBIT_LOG};
130 foreach my $package (@packages) {
131 my $ext=pkgext($package);
132 my $log="debian/${ext}debhelper.log";
133 open(LOG, ">>", $log) || error("failed to write to ${log}: $!");
143 # Pass it an array containing the arguments of a shell command like would
144 # be run by exec(). It turns that into a line like you might enter at the
145 # shell, escaping metacharacters and quoting arguments that contain spaces.
150 foreach my $word (@args) {
152 # Escape only a few things since it will be quoted.
153 # Note we use double quotes because you cannot
154 # escape ' in single quotes, while " can be escaped
156 # This does make -V"foo bar" turn into "-Vfoo bar",
157 # but that will be parsed identically by the shell
159 $word=~s/([\n`\$"\\])/\\$1/g;
160 push @ret, "\"$word\"";
163 # This list is from _Unix in a Nutshell_. (except '#')
164 $word=~s/([\s!"\$()*+#;<>?@\[\]\\`|~])/\\$1/g;
168 return join(' ', @ret);
171 # Run a command, and display the command to stdout if verbose mode is on.
172 # All commands that modifiy files in $TMP should be ran via this
175 # Note that this cannot handle complex commands, especially anything
176 # involving redirection. Use complex_doit instead.
178 verbose_print(escape_shell(@_));
181 system(@_) == 0 || _error_exitcode(join(" ", @_));
185 # Run a command and display the command to stdout if verbose mode is on.
186 # Use doit() if you can, instead of this function, because this function
187 # forks a shell. However, this function can handle more complicated stuff
190 verbose_print(join(" ",@_));
193 # The join makes system get a scalar so it forks off a shell.
194 system(join(" ", @_)) == 0 || _error_exitcode(join(" ", @_))
198 sub _error_exitcode {
201 error("$command failed to to execute: $!");
204 error("$command died with signal ".($? & 127));
207 error("$command returned exit code ".($? >> 8));
211 # Run a command that may have a huge number of arguments, like xargs does.
212 # Pass in a reference to an array containing the arguments, and then other
213 # parameters that are the command and any parameters that should be passed to
218 # The kernel can accept command lines up to 20k worth of characters.
219 my $command_max=20000; # LINUX SPECIFIC!!
220 # (And obsolete; it's bigger now.)
221 # I could use POSIX::ARG_MAX, but that would be slow.
223 # Figure out length of static portion of command.
226 $static_length+=length($_)+1;
230 my $length=$static_length;
232 if (length($_) + 1 + $static_length > $command_max) {
233 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? \"@_ $_\"");
235 $length+=length($_) + 1;
236 if ($length < $command_max) {
240 doit(@_,@collect) if $#collect > -1;
242 $length=$static_length + length($_) + 1;
245 doit(@_,@collect) if $#collect > -1;
248 # Print something if the verbose flag is on.
253 print "\t$message\n";
257 # Output an error message and die (can be caught).
261 die basename($0).": $message\n";
268 print STDERR basename($0).": $message\n";
271 # Returns the basename of the argument passed to it.
275 $fn=~s/\/$//g; # ignore trailing slashes
276 $fn=~s:^.*/(.*?)$:$1:;
280 # Returns the directory name of the argument passed to it.
284 $fn=~s/\/$//g; # ignore trailing slashes
285 $fn=~s:^(.*)/.*?$:$1:;
289 # Pass in a number, will return true iff the current compatibility level
290 # is less than or equal to that number.
300 if (defined $ENV{DH_COMPAT}) {
303 elsif (-e 'debian/compat') {
305 open (COMPAT_IN, "debian/compat") || error "debian/compat: $!";
308 if (! defined $l || ! length $l) {
309 warning("debian/compat is empty, assuming level $c");
318 if ($c <= 4 && ! $warned_compat) {
319 warning("Compatibility levels before 5 are deprecated.");
323 if ($c > $max_compat) {
324 error("Sorry, but $max_compat is the highest compatibility level supported by this debhelper.");
331 # Pass it a name of a binary package, it returns the name of the tmp dir to
332 # use, for that package.
339 elsif (compat(1) && $package eq $dh{MAINPACKAGE}) {
340 # This is for back-compatibility with the debian/tmp tradition.
344 return "debian/$package";
348 # Pass this the name of a binary package, and the name of the file wanted
349 # for the package, and it will return the actual existing filename to use.
351 # It tries several filenames:
352 # * debian/package.filename.buildarch
353 # * debian/package.filename.buildos
354 # * debian/package.filename
355 # * debian/filename (if the package is the main package)
356 # If --name was specified then the files
357 # must have the name after the package name:
358 # * debian/package.name.filename.buildarch
359 # * debian/package.name.filename.buildos
360 # * debian/package.name.filename
361 # * debian/name.filename (if the package is the main package)
366 if (defined $dh{NAME}) {
367 $filename="$dh{NAME}.$filename";
370 # First, check for files ending in buildarch and buildos.
372 foreach my $file (glob("debian/$package.$filename.*")) {
374 next if $dh{IGNORE} && exists $dh{IGNORE}->{$file};
375 if ($file eq "debian/$package.$filename.".buildarch()) {
377 # buildarch files are used in preference to buildos files.
380 elsif ($file eq "debian/$package.$filename.".buildos()) {
384 return $match if defined $match;
386 my @try=("debian/$package.$filename");
387 if ($package eq $dh{MAINPACKAGE}) {
388 push @try, "debian/$filename";
391 foreach my $file (@try) {
393 (! $dh{IGNORE} || ! exists $dh{IGNORE}->{$file})) {
403 # Pass it a name of a binary package, it returns the name to prefix to files
404 # in debian/ for this package.
408 if (compat(1) and $package eq $dh{MAINPACKAGE}) {
414 # Pass it the name of a binary package, it returns the name to install
415 # files by in eg, etc. Normally this is the same, but --name can override
420 if (defined $dh{NAME}) {
426 # Returns 1 if the package is a native debian package, null otherwise.
427 # As a side effect, sets $dh{VERSION} to the version of this package.
429 # Caches return code so it only needs to run dpkg-parsechangelog once.
435 return $isnative_cache{$package} if defined $isnative_cache{$package};
437 # Make sure we look at the correct changelog.
438 my $isnative_changelog=pkgfile($package,"changelog");
439 if (! $isnative_changelog) {
440 $isnative_changelog="debian/changelog";
442 # Get the package version.
443 my $version=`dpkg-parsechangelog -l$isnative_changelog`;
444 ($dh{VERSION})=$version=~m/Version:\s*(.*)/m;
445 # Did the changelog parse fail?
446 if (! defined $dh{VERSION}) {
447 error("changelog parse failure");
450 # Is this a native Debian package?
451 if ($dh{VERSION}=~m/.*-/) {
452 return $isnative_cache{$package}=0;
455 return $isnative_cache{$package}=1;
460 # Automatically add a shell script snippet to a debian script.
461 # Only works if the script has #DEBHELPER# in it.
465 # 2: script to add to
466 # 3: filename of snippet
467 # 4: sed to run on the snippet. Ie, s/#PACKAGE#/$PACKAGE/
474 # This is the file we will modify.
475 my $outfile="debian/".pkgext($package)."$script.debhelper";
477 # Figure out what shell script snippet to use.
479 if (defined($ENV{DH_AUTOSCRIPTDIR}) &&
480 -e "$ENV{DH_AUTOSCRIPTDIR}/$filename") {
481 $infile="$ENV{DH_AUTOSCRIPTDIR}/$filename";
484 if (-e "/usr/share/debhelper/autoscripts/$filename") {
485 $infile="/usr/share/debhelper/autoscripts/$filename";
488 error("/usr/share/debhelper/autoscripts/$filename does not exist");
492 if (-e $outfile && ($script eq 'postrm' || $script eq 'prerm')
494 # Add fragments to top so they run in reverse order when removing.
495 complex_doit("echo \"# Automatically added by ".basename($0)."\"> $outfile.new");
496 complex_doit("sed \"$sed\" $infile >> $outfile.new");
497 complex_doit("echo '# End automatically added section' >> $outfile.new");
498 complex_doit("cat $outfile >> $outfile.new");
499 complex_doit("mv $outfile.new $outfile");
502 complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
503 complex_doit("sed \"$sed\" $infile >> $outfile");
504 complex_doit("echo '# End automatically added section' >> $outfile");
508 # Removes a whole substvar line.
513 my $ext=pkgext($package);
514 my $substvarfile="debian/${ext}substvars";
516 if (-e $substvarfile) {
517 complex_doit("grep -s -v '^${substvar}=' $substvarfile > $substvarfile.new || true");
518 doit("mv", "$substvarfile.new","$substvarfile");
522 # Adds a dependency on some package to the specified
523 # substvar in a package's substvar's file.
527 my $deppackage=shift;
531 my $ext=pkgext($package);
532 my $substvarfile="debian/${ext}substvars";
534 $str.=" ($verinfo)" if defined $verinfo && length $verinfo;
536 # Figure out what the line will look like, based on what's there
537 # now, and what we're to add or remove.
539 if (-e $substvarfile) {
541 open(SUBSTVARS_IN, "$substvarfile") || error "read $substvarfile: $!";
542 while (<SUBSTVARS_IN>) {
544 if (/^\Q$substvar\E=(.*)/) {
545 %items = map { $_ => 1} split(", ", $1);
557 $line=join(", ", sort keys %items);
564 complex_doit("(grep -s -v ${substvar} $substvarfile; echo ".escape_shell("${substvar}=$line").") > $substvarfile.new");
565 doit("mv", "$substvarfile.new", $substvarfile);
568 delsubstvar($package,$substvar);
572 # Reads in the specified file, one line at a time. splits on words,
573 # and returns an array of arrays of the contents.
574 # If a value is passed in as the second parameter, then glob
575 # expansion is done in the directory specified by the parameter ("." is
576 # frequently a good choice).
577 sub filedoublearray {
582 open (DH_FARRAY_IN, $file) || error("cannot read $file: $1");
583 while (<DH_FARRAY_IN>) {
585 # Only ignore comments and empty lines in v5 mode.
587 next if /^#/ || /^$/;
590 # Only do glob expansion in v3 mode.
592 # The tricky bit is that the glob expansion is done
593 # as if we were in the specified directory, so the
594 # filenames that come out are relative to it.
595 if (defined $globdir && ! compat(2)) {
596 foreach (map { glob "$globdir/$_" } split) {
611 # Reads in the specified file, one word at a time, and returns an array of
612 # the result. Can do globbing as does filedoublearray.
614 return map { @$_ } filedoublearray(@_);
617 # Passed a filename, returns true if -X says that file should be excluded.
619 my $filename = shift;
620 foreach my $f (@{$dh{EXCLUDE}}) {
621 return 1 if $filename =~ /\Q$f\E/;
627 my %dpkg_arch_output;
628 sub dpkg_architecture_value {
630 if (! exists($dpkg_arch_output{$var})) {
632 open(PIPE, '-|', 'dpkg-architecture')
633 or error("dpkg-architecture failed");
636 my ($k, $v) = split(/=/, $_, 2);
637 $dpkg_arch_output{$k} = $v;
641 return $dpkg_arch_output{$var};
645 # Returns the build architecture.
647 dpkg_architecture_value('DEB_HOST_ARCH');
650 # Returns the build OS.
652 dpkg_architecture_value("DEB_HOST_ARCH_OS");
655 # Passed an arch and a list of arches to match against, returns true if matched
661 my @archlist=split(/\s+/,shift);
663 foreach my $a (@archlist) {
664 # Avoid expensive dpkg-architecture call to compare
665 # with a simple architecture name. "linux-any" and
666 # other architecture wildcards are (currently)
669 return 1 if $arch eq $a;
671 elsif (exists $knownsame{$arch}{$a}) {
672 return 1 if $knownsame{$arch}{$a};
674 elsif (system("dpkg-architecture", "-a$arch", "-i$a") == 0) {
675 return $knownsame{$arch}{$a}=1;
678 $knownsame{$arch}{$a}=0;
686 # Returns source package name
688 open (CONTROL, 'debian/control') ||
689 error("cannot read debian/control: $!\n");
693 if (/^Source:\s*(.*)/) {
700 error("could not find Source: line in control file.");
703 # Returns a list of packages in the control file.
704 # Pass "arch" or "indep" to specify arch-dependant (that will be built
705 # for the system's arch) or independant. If nothing is specified,
706 # returns all packages. Also, "both" returns the union of "arch" and "indep"
708 # As a side effect, populates %package_arches and %package_types with the
709 # types of all packages (not only those returned).
710 my (%package_types, %package_arches);
717 $type="" if ! defined $type;
724 open (CONTROL, 'debian/control') ||
725 error("cannot read debian/control: $!\n");
729 if (/^Package:\s*(.*)/) {
731 # Detect duplicate package names in the same control file.
732 if (! $seen{$package}) {
736 error("debian/control has a duplicate entry for $package");
740 if (/^Architecture:\s*(.*)/) {
743 if (/^(?:X[BC]*-)?Package-Type:\s*(.*)/) {
747 if (!$_ or eof) { # end of stanza.
749 $package_types{$package}=$package_type;
750 $package_arches{$package}=$arch;
754 ((($type eq 'indep' || $type eq 'both') && $arch eq 'all') ||
755 (($type eq 'arch' || $type eq 'both') && ($arch eq 'any' ||
757 samearch(buildarch(), $arch)))) ||
759 push @list, $package;
770 # Returns the arch a package will build for.
774 if (! exists $package_arches{$package}) {
775 warning "package $package is not in control info";
778 return $package_arches{$package} eq 'all' ? "all" : buildarch();
781 # Return true if a given package is really a udeb.
785 if (! exists $package_types{$package}) {
786 warning "package $package is not in control info";
789 return $package_types{$package} eq 'udeb';
792 # Generates the filename that is used for a udeb package.
796 my $filearch=package_arch($package);
797 isnative($package); # side effect
798 my $version=$dh{VERSION};
799 $version=~s/^[0-9]+://; # strip any epoch
800 return "${package}_${version}_$filearch.udeb";
803 # Handles #DEBHELPER# substitution in a script; also can generate a new
804 # script from scratch if none exists but there is a .debhelper file for it.
805 sub debhelper_script_subst {
809 my $tmp=tmpdir($package);
810 my $ext=pkgext($package);
811 my $file=pkgfile($package,$script);
814 if (-f "debian/$ext$script.debhelper") {
815 # Add this into the script, where it has #DEBHELPER#
816 complex_doit("perl -pe 's~#DEBHELPER#~qx{cat debian/$ext$script.debhelper}~eg' < $file > $tmp/DEBIAN/$script");
819 # Just get rid of any #DEBHELPER# in the script.
820 complex_doit("sed s/#DEBHELPER#// < $file > $tmp/DEBIAN/$script");
822 doit("chown","0:0","$tmp/DEBIAN/$script");
823 doit("chmod",755,"$tmp/DEBIAN/$script");
825 elsif ( -f "debian/$ext$script.debhelper" ) {
826 complex_doit("printf '#!/bin/sh\nset -e\n' > $tmp/DEBIAN/$script");
827 complex_doit("cat debian/$ext$script.debhelper >> $tmp/DEBIAN/$script");
828 doit("chown","0:0","$tmp/DEBIAN/$script");
829 doit("chmod",755,"$tmp/DEBIAN/$script");
833 # Checks if make's jobserver is enabled via MAKEFLAGS, but
834 # the FD used to communicate with it is actually not available.
835 sub is_make_jobserver_unavailable {
836 if (exists $ENV{MAKEFLAGS} &&
837 $ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
838 if (!open(my $in, "<&$1")) {
839 return 1; # unavailable
843 return 0; # available
847 return; # no jobserver specified
850 # Cleans out jobserver options from MAKEFLAGS.
851 sub clean_jobserver_makeflags {
852 if (exists $ENV{MAKEFLAGS}) {
853 if ($ENV{MAKEFLAGS} =~ /(?:^|\s)--jobserver-fds=(\d+)/) {
854 $ENV{MAKEFLAGS} =~ s/(?:^|\s)--jobserver-fds=\S+//g;
855 $ENV{MAKEFLAGS} =~ s/(?:^|\s)-j\b//g;
857 delete $ENV{MAKEFLAGS} if $ENV{MAKEFLAGS} =~ /^\s*$/;