5 dh - debhelper command sequencer
10 use Debian::Debhelper::Dh_Lib;
14 B<dh> I<sequence> [B<--with> I<addon>[B<,>I<addon> ...]] [B<--list>] [B<--until> I<cmd>] [B<--before> I<cmd>] [B<--after> I<cmd>] [B<--remaining>] [S<I<debhelper options>>]
18 B<dh> runs a sequence of debhelper commands. The supported I<sequence>s
19 correspond to the targets of a F<debian/rules> file: B<build-arch>,
20 B<build-indep>, B<build>, B<clean>, B<install-indep>, B<install-arch>,
21 B<install>, B<binary-arch>, B<binary-indep>, and B<binary>.
23 Commands in the B<build-indep>, B<install-indep> and B<binary-indep>
24 sequences are passed the B<-i> option to ensure they only work on
25 architecture independent packages, and commands in the B<build-arch>,
26 B<install-arch> and B<binary-arch> sequences are passed the B<-a>
27 option to ensure they only work on architecture dependent packages.
29 If F<debian/rules> contains a target with a name like B<override_>I<dh_command>,
30 then when it would normally run I<dh_command>, B<dh> will instead call that
31 target. The override target can then run the command with additional options,
32 or run entirely different commands instead. See examples below. (Note that to
33 use this feature, you should Build-Depend on debhelper 7.0.50 or above.)
39 =item B<--with> I<addon>[B<,>I<addon> ...]
41 Add the debhelper commands specified by the given addon to appropriate places
42 in the sequence of commands that is run. This option can be repeated more
43 than once, or multiple addons can be listed, separated by commas.
44 This is used when there is a third-party package that provides
45 debhelper commands. See the F<PROGRAMMING> file for documentation about
46 the sequence addon interface.
48 =item B<--without> I<addon>
50 The inverse of B<--with>, disables using the given addon.
52 =item B<--list>, B<-l>
54 List all available addons.
56 =item B<--until> I<cmd>
58 Run commands in the sequence until and including I<cmd>, then stop.
60 =item B<--before> I<cmd>
62 Run commands in the sequence before I<cmd>, then stop.
64 =item B<--after> I<cmd>
66 Run commands in the sequence that come after I<cmd>.
70 Run all commands in the sequence that have yet to be run.
74 Prints commands that would run for a given sequence, but does not run them.
78 All other options passed to B<dh> are passed on to each command it runs. This
79 can be used to set an option like B<-v> or B<-X> or B<-N>, as well as for more
82 In the above options, I<cmd> can be a full name of a debhelper command, or
83 a substring. It'll first search for a command in the sequence exactly
84 matching the name, to avoid any ambiguity. If there are multiple substring
85 matches, the last one in the sequence will be used.
93 foreach my $i (0..$#sequence) {
94 if ($command eq $sequence[$i]) {
100 foreach my $i (0..$#sequence) {
101 if ($sequence[$i] =~ /\Q$command\E/) {
106 error "command specification \"$command\" does not match any command in the sequence"
115 To see what commands are included in a sequence, without actually doing
118 dh binary-arch --no-act
120 This is a very simple rules file, for packages where the default sequences of
121 commands work with no additional options.
127 Often you'll want to pass an option to a specific debhelper command. The
128 easy way to do with is by adding an override target for that command.
137 override_dh_installdocs:
138 dh_installdocs README TODO
140 Sometimes the automated L<dh_auto_configure(1)> and L<dh_auto_build(1)>
141 can't guess what to do for a strange package. Here's how to avoid running
142 either and instead run your own commands.
148 override_dh_auto_configure:
151 override_dh_auto_build:
152 make universe-explode-in-delight
154 Another common case is wanting to do something manually before or
155 after a particular debhelper command is run.
161 override_dh_fixperms:
163 chmod 4755 debian/foo/usr/bin/foo
165 If your package is a Python package, B<dh> will use B<dh_pysupport> by
166 default. This is how to use B<dh_pycentral> instead.
170 dh $@ --with python-central
172 If your package uses autotools and you want to freshen F<config.sub> and
173 F<config.guess> with newer versions from the B<autotools-dev> package
174 at build time, you can use some commands provided in B<autotools-dev>
175 that automate it, like this.
179 dh $@ --with autotools_dev
181 Here is how to force use of Perl's B<Module::Build> build system,
182 which can be necessary if debhelper wrongly detects that the package
187 dh $@ --buildsystem=perl_build
189 To patch your package using quilt, you can tell B<dh> to use quilt's B<dh>
190 sequence addons like this:
196 Here is an example of overriding where the B<dh_auto_>I<*> commands find
197 the package's source, for a package where the source is located in a
202 dh $@ --sourcedirectory=src
204 And here is an example of how to tell the B<dh_auto_>I<*> commands to build
205 in a subdirectory, which will be removed on B<clean>.
209 dh $@ --builddirectory=build
211 If your package can be built in parallel, you can support parallel building
212 as follows. Then B<dpkg-buildpackage -j> will work.
218 Here is a way to prevent B<dh> from running several commands that you don't
219 want it to run, by defining empty override targets for each command.
225 # Commands not to run:
226 override_dh_auto_test override_dh_compress override_dh_fixperms:
228 Sometimes, you may need to make an override target only run commands when a
229 particular package is being built. This can be accomplished using
230 L<dh_listpackages(1)> to test what is being built. For example:
236 override_dh_fixperms:
238 ifneq (,$(filter foo, $(shell dh_listpackages)))
239 chmod 4755 debian/foo/usr/bin/foo
242 Finally, remember that you are not limited to using override targets in the
243 rules file when using B<dh>. You can also explicitly define any of the regular
244 rules file targets when it makes sense to do so. A common reason to do this
245 is when your package needs different B<build-arch> and B<build-indep> targets.
246 For example, a package with a long document build process can put it in
258 Note that in the example above, dh will arrange for "debian/rules build"
259 to call your build-indep and build-arch targets. You do not need to
260 explicitly define the dependencies in the rules file when using dh with
261 compatability level v9. This example would be more complicated with
262 earlier compatability levels.
266 If you're curious about B<dh>'s internals, here's how it works under the hood.
268 Each debhelper command will record when it's successfully run in
269 F<debian/package.debhelper.log>. (Which B<dh_clean> deletes.) So B<dh> can tell
270 which commands have already been run, for which packages, and skip running
271 those commands again.
273 Each time B<dh> is run, it examines the log, and finds the last logged command
274 that is in the specified sequence. It then continues with the next command
275 in the sequence. The B<--until>, B<--before>, B<--after>, and B<--remaining>
276 options can override this behavior.
278 A sequence can also run dependent targets in debian/rules. For
279 example, the "binary" sequence runs the "install" target.
281 B<dh> uses the B<DH_INTERNAL_OPTIONS> environment variable to pass information
282 through to debhelper commands that are run inside override targets. The
283 contents (and indeed, existence) of this environment variable, as the name
284 might suggest, is subject to change at any time.
288 # Stash this away before init modifies it.
291 # python-support is enabled by default, at least for now
292 # (and comes first so python-central loads later and can disable it).
293 unshift @ARGV, "--with=python-support";
296 "until=s" => \$dh{UNTIL},
297 "after=s" => \$dh{AFTER},
298 "before=s" => \$dh{BEFORE},
299 "remaining" => \$dh{REMAINING},
301 my ($option,$value)=@_;
302 push @{$dh{WITH}},split(",", $value);
305 my ($option,$value)=@_;
306 @{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
308 "l" => \&list_addons,
309 "list" => \&list_addons,
311 # Disable complaints about unknown options; they are passed on to
312 # the debhelper commands.
313 ignore_unknown_options => 1,
314 # Bundling does not work well since there are unknown options.
320 # If make is using a jobserver, but it is not available
321 # to this process, clean out MAKEFLAGS. This avoids
322 # ugly warnings when calling make.
323 if (is_make_jobserver_unavailable()) {
324 clean_jobserver_makeflags();
327 # Process the sequence parameter.
330 # From v8, the sequence is the very first parameter.
331 $sequence=shift @ARGV_orig;
332 if ($sequence=~/^-/) {
333 error "Unknown sequence $sequence (options should not come before the sequence)";
337 # Before v8, the sequence could be at any position in the parameters,
338 # so was what was left after parsing.
340 if (defined $sequence) {
341 @ARGV_orig=grep { $_ ne $sequence } @ARGV_orig;
344 if (! defined $sequence) {
345 error "specify a sequence to run";
347 # make -B causes the rules file to be run as a target.
348 # Also support completly empty override targets.
349 # Note: it's not safe to use rules_explicit_target before this check.
350 if ($sequence eq 'debian/rules' ||
351 $sequence =~ /^override_dh_/) {
356 # Definitions of sequences.
423 $sequences{clean} = [qw{
428 $sequences{'build-indep'} = [@bd];
429 $sequences{'build-arch'} = [@bd];
431 # From v9, sequences take standard rules targets into account.
432 if (rules_explicit_target('build-arch') ||
433 rules_explicit_target('build-indep')) {
434 # run sequences separately
435 $sequences{build} = [@bd_minimal, 'rules:build-arch', 'rules:build-indep'];
438 # run standard sequence (this is faster)
439 $sequences{build} = [@bd];
441 $sequences{'install-indep'} = ['rules:build-indep', @i];
442 $sequences{'install-arch'} = ['rules:build-arch', @i];
443 if (rules_explicit_target('install-arch') ||
444 rules_explicit_target('install-indep')) {
445 # run sequences separately
446 $sequences{'install'} = ['rules:build', @i_minimal, 'rules:install-arch', 'rules:install-indep'];
449 # run standard sequence (this is faster)
450 $sequences{'install'} = ['rules:build', @i, 'rules:install-arch', 'rules:install-indep'];
452 $sequences{'binary-indep'} = ['rules:install-indep', @b];
453 $sequences{'binary-arch'} = ['rules:install-arch', @ba, @b];
454 $sequences{binary} = ['rules:install', 'rules:binary-arch', 'rules:binary-indep'];
457 $sequences{build} = [@bd];
458 $sequences{'install'} = [@{$sequences{build}}, @i];
459 $sequences{'install-indep'} = [@{$sequences{'build-indep'}}, @i];
460 $sequences{'install-arch'} = [@{$sequences{'build-arch'}}, @i];
461 $sequences{binary} = [@{$sequences{install}}, @ba, @b];
462 $sequences{'binary-indep'} = [@{$sequences{'install-indep'}}, @b];
463 $sequences{'binary-arch'} = [@{$sequences{'install-arch'}}, @ba, @b];
466 # Additional command options
469 # sequence addon interface
474 foreach my $sequence (keys %sequences) {
475 my @list=@{$sequences{$sequence}};
476 next unless grep $existing, @list;
478 foreach my $command (@list) {
479 if ($command eq $existing) {
480 push @new, $new if $offset < 0;
482 push @new, $new if $offset > 0;
488 $sequences{$sequence}=\@new;
499 foreach my $sequence (keys %sequences) {
500 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
507 unshift @{$sequences{$sequence}}, $command;
509 sub add_command_options {
511 push @{$command_opts{$command}}, @_;
513 sub remove_command_options {
516 # Remove only specified options
517 if (my $opts = $command_opts{$command}) {
518 foreach my $opt (@_) {
519 $opts = [ grep { $_ ne $opt } @$opts ];
521 $command_opts{$command} = $opts;
525 # Clear all additional options
526 delete $command_opts{$command};
534 eval q{use File::Spec};
535 my $path = File::Spec->catdir($inc, "Debian/Debhelper/Sequence");
537 for my $module_path (glob "$path/*.pm") {
538 my $name = basename($module_path);
546 for my $name (sort keys %addons) {
553 # Load addons, which can modify sequences.
554 foreach my $addon (@{$dh{WITH}}) {
555 my $mod="Debian::Debhelper::Sequence::$addon";
559 error("unable to load addon $addon: $@");
563 if (! exists $sequences{$sequence}) {
564 error "Unknown sequence $sequence (choose from: ".
565 join(" ", sort keys %sequences).")";
567 my @sequence=optimize_sequence(@{$sequences{$sequence}});
569 # The list of all packages that can be acted on.
570 my @packages=@{$dh{DOPACKAGES}};
572 # Get the options to pass to commands in the sequence.
573 # Filter out options intended only for this program.
575 if ($sequence eq 'build-arch' ||
576 $sequence eq 'install-arch' ||
577 $sequence eq 'binary-arch') {
579 # as an optimisation, remove from the list any packages
580 # that are not arch dependent
581 my %arch_packages = map { $_ => 1 } getpackages("arch");
582 @packages = grep { $arch_packages{$_} } @packages;
584 elsif ($sequence eq 'build-indep' ||
585 $sequence eq 'install-indep' ||
586 $sequence eq 'binary-indep') {
588 # ditto optimisation for arch indep
589 my %indep_packages = map { $_ => 1 } getpackages("indep");
590 @packages = grep { $indep_packages{$_} } @packages;
593 my $opt=shift @ARGV_orig;
594 if ($opt =~ /^--?(after|until|before|with|without)$/) {
598 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with|without)=)/) {
602 push @options, "-O".$opt;
605 if ($options[$#options]=~/^-O--/) {
606 $options[$#options].="=".$opt;
609 $options[$#options].=$opt;
614 # Figure out at what point in the sequence to start for each package.
617 foreach my $package (@packages) {
618 my @log=load_log($package, \%logged);
620 # Run commands in the sequence that come after the
622 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
623 # Write a dummy log entry indicating that the specified
624 # command was, in fact, run. This handles the case where
625 # no commands remain to run after it, communicating to
626 # future dh instances that the specified command should not
628 write_log($sequence[$startpoint{$package}-1], $package);
630 elsif ($dh{REMAINING}) {
631 # Start at the beginning so all remaining commands will get
633 $startpoint{$package}=0;
636 # Find the last logged command that is in the sequence, and
637 # continue with the next command after it. If no logged
638 # command is in the sequence, we're starting at the beginning..
639 $startpoint{$package}=0;
640 COMMAND: foreach my $command (reverse @log) {
641 foreach my $i (0..$#sequence) {
642 if ($command eq $sequence[$i]) {
643 $startpoint{$package}=$i+1;
651 # Figure out what point in the sequence to go to.
652 my $stoppoint=$#sequence;
654 $stoppoint=command_pos($dh{UNTIL}, @sequence);
656 elsif ($dh{BEFORE}) {
657 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
660 # Now run the commands in the sequence.
661 foreach my $i (0..$stoppoint) {
662 # Figure out which packages need to run this command.
664 foreach my $package (@packages) {
665 if ($startpoint{$package} > $i ||
666 $logged{$package}{$sequence[$i]}) {
667 push @exclude, $package;
671 if (@exclude eq @packages) {
672 # Command already done for all packages.
676 run($sequence[$i], \@packages, \@exclude, @options);
681 my @packages=@{shift()};
682 my @exclude=@{shift()};
685 # If some packages are excluded, add flags
686 # to prevent them from being acted on.
687 push @options, map { "-N$_" } @exclude;
689 # Check for override targets in debian/rules and
690 # run them instead of running the command directly.
691 my $override_command;
692 my $has_explicit_target = rules_explicit_target("override_".$command);
694 # If the command has a rules: prefix, run debian/rules with
695 # the remainder as the target.
696 my $rules_target = rules_target($command);
697 if (defined $rules_target) {
698 # Don't pass DH_ environment variables, since this is
699 # a fresh invocation of debian/rules and any sub-dh
701 $override_command=$command;
702 delete $ENV{DH_INTERNAL_OPTIONS};
703 delete $ENV{DH_INTERNAL_OVERRIDE};
704 $command="debian/rules";
705 @options=$rules_target;
707 elsif (defined $has_explicit_target) {
708 $override_command=$command;
709 # Check if target isn't noop
710 if ($has_explicit_target) {
711 # This passes the options through to commands called
713 $ENV{DH_INTERNAL_OPTIONS}=join("\x1e", @options);
714 $ENV{DH_INTERNAL_OVERRIDE}=$command;
715 $command="debian/rules";
716 @options="override_".$override_command;
723 # Pass additional command options if any
724 unshift @options, @{$command_opts{$command}} if exists $command_opts{$command};
727 if (defined $command) {
728 # 3 space indent lines the command being run up under the
729 # sequence name after "dh ".
730 print " ".escape_shell($command, @options)."\n";
733 print " ", "# Skipping ", $override_command, " - empty override", "\n";
737 if (defined $command) {
738 my $ret=system($command, @options);
740 if ($ret >> 8 != 0) {
748 if (defined $override_command) {
749 # Update log for overridden command now that it has
750 # finished successfully.
751 # (But avoid logging for dh_clean since it removes
753 if ($override_command ne 'dh_clean') {
754 my %packages=map { $_ => 1 } @packages;
755 map { delete $packages{$_} } @exclude;
756 write_log($override_command, keys %packages);
757 commit_override_log(keys %packages);
760 delete $ENV{DH_INTERNAL_OPTIONS};
761 delete $ENV{DH_INTERNAL_OVERRIDE};
766 sub optimize_sequence {
770 # commands can appear multiple times when sequences are
771 # inlined together; only the first should be needed
773 if (! $seen{$command}) {
775 push @sequence, $command;
778 foreach my $command (@_) {
779 my $rules_target=rules_target($command);
780 if (defined $rules_target &&
781 ! defined rules_explicit_target($rules_target)) {
782 # inline the sequence for this implicit target
783 $add->($_) foreach optimize_sequence(@{$sequences{$rules_target}});
794 if ($command =~ /^rules:(.*)/) {
806 sub rules_explicit_target {
807 # Checks if a specified target exists as an explicit target
809 # undef is returned if target does not exist, 0 if target is noop
810 # and 1 if target has dependencies or executes commands.
813 if (! $rules_parsed) {
814 my $processing_targets = 0;
815 my $not_a_target = 0;
817 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
819 if ($processing_targets) {
820 if (/^# Not a target:/) {
824 if (!$not_a_target && /^([^#:]+)::?\s*(.*)$/) {
825 # Target is defined. NOTE: if it is a depenency of
826 # .PHONY it will be defined too but that's ok.
827 # $2 contains target dependencies if any.
828 $current_target = $1;
829 $targets{$current_target} = ($2) ? 1 : 0;
832 if (defined $current_target) {
834 # Check if target has commands to execute
835 if (/^#\s*commands to execute/) {
836 $targets{$current_target} = 1;
841 $current_target = undef;
845 # "Not a target:" is always followed by
846 # a target name, so resetting this one
851 elsif (/^# Files$/) {
852 $processing_targets = 1;
859 return $targets{$target};
868 This program is a part of debhelper.
872 Joey Hess <joeyh@debian.org>