5 dh - debhelper command sequencer
10 use Debian::Debhelper::Dh_Lib;
14 B<dh> sequence [B<--with> I<addon>[,I<addon>,...]] [B<--list>] [B<--until> I<cmd>] [B<--before> I<cmd>] [B<--after> I<cmd>] [B<--remaining>] [S<I<debhelper options>>]
18 dh runs a sequence of debhelper commands. The supported sequences
19 correspond to the targets of a debian/rules file: "build", "clean",
20 "install", "binary-arch", "binary-indep", and "binary".
22 Commands in the binary-indep sequence are passed the "-i" option to ensure
23 they only work on binary independent packages, and commands in the
24 binary-arch sequences are passed the "-a" option to ensure they only work
25 on architecture dependent packages.
27 Each debhelper command will record when it's successfully run in
28 debian/package.debhelper.log. (Which dh_clean deletes.) So dh can tell
29 which commands have already been run, for which packages, and skip running
32 Each time dh is run, it examines the log, and finds the last logged command
33 that is in the specified sequence. It then continues with the next command
34 in the sequence. The B<--until>, B<--before>, B<--after>, and B<--remaining>
35 options can override this behavior.
37 If debian/rules contains a target with a name like "override_I<dh_command>",
38 then when it would normally run I<dh_command>, dh will instead call that
39 target. The override target can then run the command with additional options,
40 or run entirely different commands instead. See examples below. (Note that to
41 use this feature, you should Build-Depend on debhelper 7.0.50 or above.)
47 =item B<--with> I<addon>[,I<addon>,...]
49 Add the debhelper commands specified by the given addon to appropriate places
50 in the sequence of commands that is run. This option can be repeated more
51 than once, or multiple addons can be listed, separated by commas.
52 This is used when there is a third-party package that provides
53 debhelper commands. See the PROGRAMMING file for documentation about
54 the sequence addon interface.
56 =item B<--without> I<addon>
58 The inverse of --with, disables using the given addon.
60 =item B<--list>, B<-l>
62 List all available addons.
64 =item B<--until> I<cmd>
66 Run commands in the sequence until and including I<cmd>, then stop.
68 =item B<--before> I<cmd>
70 Run commands in the sequence before I<cmd>, then stop.
72 =item B<--after> I<cmd>
74 Run commands in the sequence that come after I<cmd>.
78 Run all commands in the sequence that have yet to be run.
82 Prints commands that would run for a given sequence, but does not run them.
86 All other options passed to dh are passed on to each command it runs. This
87 can be used to set an option like "-v" or "-X" or "-N", as well as for more
90 In the above options, I<cmd> can be a full name of a debhelper command, or
91 a substring. It'll first search for a command in the sequence exactly
92 matching the name, to avoid any ambiguity. If there are multiple substring
93 matches, the last one in the sequence will be used.
101 foreach my $i (0..$#sequence) {
102 if ($command eq $sequence[$i]) {
108 foreach my $i (0..$#sequence) {
109 if ($sequence[$i] =~ /\Q$command\E/) {
114 error "command specification \"$command\" does not match any command in the sequence"
123 To see what commands are included in a sequence, without actually doing
126 dh binary-arch --no-act
128 This is a very simple rules file, for packages where the default sequences of
129 commands work with no additional options.
135 Often you'll want to pass an option to a specific debhelper command. The
136 easy way to do with is by adding an override target for that command.
145 override_dh_installdocs:
146 dh_installdocs README TODO
148 Sometimes the automated dh_auto_configure and dh_auto_build can't guess
149 what to do for a strange package. Here's how to avoid running either
150 and instead run your own commands.
156 override_dh_auto_configure:
159 override_dh_auto_build:
160 make universe-explode-in-delight
162 Another common case is wanting to do something manually before or
163 after a particular debhelper command is run.
169 override_dh_fixperms:
171 chmod 4755 debian/foo/usr/bin/foo
173 If your package is a python package, dh will use dh_pysupport by
174 default. This is how to use dh_pycentral instead.
178 dh $@ --with python-central
180 Here is how to force use of perl's Module::Build build system,
181 which can be necessary if debhelper wrongly detects that the package
186 dh $@ --buildsystem=perl_build
188 To patch your package using quilt, you can tell dh to use quilt's dh
189 sequence addons like this:
195 Here is an example of overriding where the dh_auto_* commands find
196 the package's source, for a package where the source is located in a
201 dh $@ --sourcedirectory=src
203 And here is an example of how to tell the dh_auto_* commands to build
204 in a subdirectory, which will be removed on clean.
208 dh $@ --builddirectory=build
210 Finally, here is a way to prevent dh from running several commands
211 that you don't want it to run, by defining empty override targets for each
218 # Commands not to run:
219 override_dh_auto_test override_dh_compress override_dh_fixperms:
223 # Stash this away before init modifies it.
226 # python-support is enabled by default, at least for now
227 # (and comes first so python-central loads later and can disable it).
228 unshift @ARGV, "--with=python-support";
231 "until=s" => \$dh{UNTIL},
232 "after=s" => \$dh{AFTER},
233 "before=s" => \$dh{BEFORE},
234 "remaining" => \$dh{REMAINING},
236 my ($option,$value)=@_;
237 push @{$dh{WITH}},split(",", $value);
240 my ($option,$value)=@_;
241 @{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
244 "list" => \$dh{LIST},
246 # Disable complaints about unknown options; they are passed on the
247 # debhelper commands.
248 ignore_unknown_options => 1,
253 # If make is using a jobserver, but it is not available
254 # to this process, clean out MAKEFLAGS. This avoids
255 # ugly warnings when calling make.
256 if (is_make_jobserver_unavailable()) {
257 clean_jobserver_makeflags();
260 # Definitions of sequences.
262 $sequences{build} = [qw{
268 $sequences{clean} = [qw{
273 $sequences{install} = [@{$sequences{build}}, qw{
319 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
320 $sequences{binary} = [@{$sequences{install}}, qw{
325 $sequences{'binary-arch'} = [@{$sequences{binary}}];
327 # Additional command options
330 # sequence addon interface
335 foreach my $sequence (keys %sequences) {
336 my @list=@{$sequences{$sequence}};
337 next unless grep $existing, @list;
339 foreach my $command (@list) {
340 if ($command eq $existing) {
341 push @new, $new if $offset < 0;
343 push @new, $new if $offset > 0;
349 $sequences{$sequence}=\@new;
360 foreach my $sequence (keys %sequences) {
361 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
368 unshift @{$sequences{$sequence}}, $command;
370 sub add_command_options {
372 push @{$command_opts{$command}}, @_;
374 sub remove_command_options {
377 # Remove only specified options
378 if (my $opts = $command_opts{$command}) {
379 foreach my $opt (@_) {
380 $opts = [ grep { $_ ne $opt } @$opts ];
382 $command_opts{$command} = $opts;
386 # Clear all additional options
387 delete $command_opts{$command};
395 eval q{use File::Spec};
396 my $path = File::Spec->catdir($inc, "Debian/Debhelper/Sequence");
398 for my $module_path (glob "$path/*.pm") {
399 my $name = basename($module_path);
407 for my $name (sort keys %addons) {
414 foreach my $addon (@{$dh{WITH}}) {
415 my $mod="Debian::Debhelper::Sequence::$addon";
419 error("unable to load addon $addon: $@");
423 # Get the sequence of commands to run.
425 error "specify a sequence to run";
428 if ($sequence eq 'debian/rules' ||
429 $sequence =~ /^override_dh_/) {
430 # make -B causes the rules file to be run as a target
431 # and support completly empty override targets
434 elsif (! exists $sequences{$sequence}) {
435 error "Unknown sequence $sequence (choose from: ".
436 join(" ", sort keys %sequences).")";
438 my @sequence=@{$sequences{$sequence}};
440 # The list of all packages that can be acted on.
441 my @packages=@{$dh{DOPACKAGES}};
443 # Get the options to pass to commands in the sequence.
444 # Filter out options intended only for this program.
446 if ($sequence eq 'binary-arch') {
448 # as an optimisation, remove from the list any packages
449 # that are not arch dependent
450 my %arch_packages = map { $_ => 1 } getpackages("arch");
451 @packages = grep { $arch_packages{$_} } @packages;
453 elsif ($sequence eq 'binary-indep') {
455 # ditto optimisation for arch indep
456 my %indep_packages = map { $_ => 1 } getpackages("indep");
457 @packages = grep { $indep_packages{$_} } @packages;
460 my $opt=shift @ARGV_orig;
461 next if $opt eq $sequence;
462 if ($opt =~ /^--?(after|until|before|with|without)$/) {
466 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with|without)=)/) {
470 push @options, "-O".$opt;
473 if ($options[$#options]=~/^-O--/) {
474 $options[$#options].="=".$opt;
477 $options[$#options].=$opt;
482 # Figure out at what point in the sequence to start for each package.
485 foreach my $package (@packages) {
486 my @log=load_log($package, \%logged);
488 # Run commands in the sequence that come after the
490 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
491 # Write a dummy log entry indicating that the specified
492 # command was, in fact, run. This handles the case where
493 # no commands remain to run after it, communicating to
494 # future dh instances that the specified command should not
496 write_log($sequence[$startpoint{$package}-1], $package);
498 elsif ($dh{REMAINING}) {
499 # Start at the beginning so all remaining commands will get
501 $startpoint{$package}=0;
504 # Find the last logged command that is in the sequence, and
505 # continue with the next command after it. If no logged
506 # command is in the sequence, we're starting at the beginning..
507 $startpoint{$package}=0;
508 COMMAND: foreach my $command (reverse @log) {
509 foreach my $i (0..$#sequence) {
510 if ($command eq $sequence[$i]) {
511 $startpoint{$package}=$i+1;
519 # Figure out what point in the sequence to go to.
520 my $stoppoint=$#sequence;
522 $stoppoint=command_pos($dh{UNTIL}, @sequence);
524 elsif ($dh{BEFORE}) {
525 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
528 # Now run the commands in the sequence.
529 foreach my $i (0..$stoppoint) {
530 # Figure out which packages need to run this command.
532 foreach my $package (@packages) {
533 if ($startpoint{$package} > $i ||
534 $logged{$package}{$sequence[$i]}) {
535 push @exclude, $package;
539 if (@exclude eq @packages) {
540 # Command already done for all packages.
544 run($sequence[$i], \@packages, \@exclude, @options);
549 my @packages=@{shift()};
550 my @exclude=@{shift()};
553 # If some packages are excluded, add flags
554 # to prevent them from being acted on.
555 push @options, map { "-N$_" } @exclude;
557 # Check for override targets in debian/rules and
558 # run them instead of running the command directly.
559 my $override_command;
560 my $has_explicit_target = rules_explicit_target("override_".$command);
561 if (defined $has_explicit_target) {
562 $override_command=$command;
563 # Check if target isn't noop
564 if ($has_explicit_target) {
565 # This passes the options through to commands called
567 $ENV{DH_INTERNAL_OPTIONS}=join("\x1e", @options);
568 $command="debian/rules";
569 @options="override_".$override_command;
576 # Pass additional command options if any
577 unshift @options, @{$command_opts{$command}} if exists $command_opts{$command};
580 if (defined $command) {
581 # 3 space indent lines the command being run up under the
582 # sequence name after "dh ".
583 print " ".escape_shell($command, @options)."\n";
586 print " ", "# Skipping ", $override_command, " - empty override", "\n";
590 if (defined $command) {
591 my $ret=system($command, @options);
592 if ($ret >> 8 != 0) {
600 if (defined $override_command) {
601 delete $ENV{DH_INTERNAL_OPTIONS};
602 # Need to handle logging for overriden commands here,
603 # because the actual debhelper command may not have
604 # been run by the rules file target.
605 # (But avoid logging for dh_clean since it removes
607 if ($override_command ne 'dh_clean') {
608 my %packages=map { $_ => 1 } @packages;
609 map { delete $packages{$_} } @exclude;
610 write_log($override_command, keys %packages);
620 sub rules_explicit_target {
621 # Checks if a specified target exists as an explicit target
623 # undef is returned if target does not exist, 0 if target is noop
624 # and 1 if target has dependencies or executes commands.
627 if (! $rules_parsed) {
628 my $processing_targets = 0;
629 my $not_a_target = 0;
631 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
633 if ($processing_targets) {
634 if (/^# Not a target:/) {
638 if (!$not_a_target && /^([^#:]+)::?\s*(.*)$/) {
639 # Target is defined. NOTE: if it is a depenency of
640 # .PHONY it will be defined too but that's ok.
641 # $2 contains target dependencies if any.
642 $current_target = $1;
643 $targets{$current_target} = ($2) ? 1 : 0;
646 if (defined $current_target) {
648 # Check if target has commands to execute
649 if (/^#\s*commands to execute/) {
650 $targets{$current_target} = 1;
655 $current_target = undef;
659 # "Not a target:" is always followed by
660 # a target name, so resetting this one
665 elsif (/^# Files$/) {
666 $processing_targets = 1;
673 return $targets{$target};
682 This program is a part of debhelper.
686 Joey Hess <joeyh@debian.org>