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 notmally 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 =head1 COMMAND SPECIFICATION
92 I<cmd> can be a full name of a debhelper command, or a substring. It'll first
93 search for a command in the sequence exactly matching the name, to avoid any
94 ambiguity. If there are multiple substring matches, the last one in the
95 sequence will be used.
103 foreach my $i (0..$#sequence) {
104 if ($command eq $sequence[$i]) {
110 foreach my $i (0..$#sequence) {
111 if ($sequence[$i] =~ /\Q$command\E/) {
116 error "command specification \"$command\" does not match any command in the sequence"
125 To see what commands are included in a sequence, without actually doing
128 dh binary-arch --no-act
130 This is a very simple rules file, for packages where the default sequences of
131 commands work with no additional options.
137 Often you'll want to pass an option to a specific debhelper command. The
138 easy way to do with is by adding an override target for that command.
147 override_dh_installdocs:
148 dh_installdocs README TODO
150 Sometimes the automated dh_auto_configure and dh_auto_build can't guess
151 what to do for a strange package. Here's how to avoid running either
152 and instead run your own commands.
158 override_dh_auto_configure:
161 override_dh_auto_build:
162 make universe-explode-in-delight
164 Another common case is wanting to do something manually before or
165 after a particular debhelper command is run.
171 override_dh_fixperms:
173 chmod 4755 debian/foo/usr/bin/foo
175 If your package is a python package, dh will use dh_pysupport by
176 default. This is how to use dh_pycentral instead.
180 dh --with python-central $@
182 To patch your package using quilt, you can tell dh to use quilt's dh
183 sequence addons like this:
189 Here is an example of overriding where the dh_auto_* commands find
190 the package's source, for a package where the source is located in a
191 subdirectory. It also forces use of perl's Module::Build build system,
192 which can be necessary if debhelper wrongly detects that the package
197 dh --sourcedirectory=src --buildsystem=perl_build $@
201 # Stash this away before init modifies it.
204 # python-support is enabled by default, at least for now
205 # (and comes first so python-central loads later and can disable it).
206 unshift @ARGV, "--with=python-support";
208 # Disable complaints about unknown options for both dh and the commands
209 # it runs. This is done because dh accepts and passes on options that may
210 # be specific to only some debhelper commands.
211 $ENV{DH_IGNORE_UNKNOWN_OPTIONS}=1;
214 "until=s" => \$dh{UNTIL},
215 "after=s" => \$dh{AFTER},
216 "before=s" => \$dh{BEFORE},
217 "remaining" => \$dh{REMAINING},
219 my ($option,$value)=@_;
220 push @{$dh{WITH}},split(",", $value);
223 my ($option,$value)=@_;
224 @{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
227 "list" => \$dh{LIST},
231 # If make is using a jobserver, but it is not available
232 # to this process, clean out MAKEFLAGS. This avoids
233 # ugly warnings when calling make.
234 if (is_make_jobserver_unavailable()) {
235 clean_jobserver_makeflags();
238 # Definitions of sequences.
240 $sequences{build} = [qw{
246 $sequences{clean} = [qw{
251 $sequences{install} = [@{$sequences{build}}, qw{
297 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
298 $sequences{binary} = [@{$sequences{install}}, qw{
303 $sequences{'binary-arch'} = [@{$sequences{binary}}];
305 # Additional command options
308 # sequence addon interface
313 foreach my $sequence (keys %sequences) {
314 my @list=@{$sequences{$sequence}};
315 next unless grep $existing, @list;
317 foreach my $command (@list) {
318 if ($command eq $existing) {
319 push @new, $new if $offset < 0;
321 push @new, $new if $offset > 0;
327 $sequences{$sequence}=\@new;
338 foreach my $sequence (keys %sequences) {
339 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
346 unshift @{$sequences{$sequence}}, $command;
348 sub add_command_options {
350 push @{$command_opts{$command}}, @_;
352 sub remove_command_options {
355 # Remove only specified options
356 if (my $opts = $command_opts{$command}) {
357 foreach my $opt (@_) {
358 $opts = [ grep { $_ ne $opt } @$opts ];
360 $command_opts{$command} = $opts;
364 # Clear all additional options
365 delete $command_opts{$command};
373 eval q{use File::Spec};
374 my $path = File::Spec->catdir($inc, "Debian/Debhelper/Sequence");
376 for my $module_path (glob "$path/*.pm") {
377 my $name = basename($module_path);
385 for my $name (sort keys %addons) {
392 foreach my $addon (@{$dh{WITH}}) {
393 my $mod="Debian::Debhelper::Sequence::$addon";
397 error("unable to load addon $addon: $@");
401 # Get the sequence of commands to run.
403 error "specify a sequence to run";
406 if ($sequence eq 'debian/rules' ||
407 $sequence =~ /^override_dh_/) {
408 # make -B causes the rules file to be run as a target
409 # and support completly empty override targets
412 elsif (! exists $sequences{$sequence}) {
413 error "Unknown sequence $sequence (choose from: ".
414 join(" ", sort keys %sequences).")";
416 my @sequence=@{$sequences{$sequence}};
418 # The list of all packages that can be acted on.
419 my @packages=@{$dh{DOPACKAGES}};
421 # Get the options to pass to commands in the sequence.
422 # Filter out options intended only for this program.
424 if ($sequence eq 'binary-arch') {
426 # as an optimisation, remove from the list any packages
427 # that are not arch dependent
428 my %arch_packages = map { $_ => 1 } getpackages("arch");
429 @packages = grep { $arch_packages{$_} } @packages;
431 elsif ($sequence eq 'binary-indep') {
433 # ditto optimisation for arch indep
434 my %indep_packages = map { $_ => 1 } getpackages("indep");
435 @packages = grep { $indep_packages{$_} } @packages;
438 my $opt=shift @ARGV_orig;
439 next if $opt eq $sequence;
440 if ($opt =~ /^--?(after|until|before|with|without)$/) {
444 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with|without)=)/) {
450 # Figure out at what point in the sequence to start for each package.
453 foreach my $package (@packages) {
454 my @log=load_log($package, \%logged);
456 # Run commands in the sequence that come after the
458 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
459 # Write a dummy log entry indicating that the specified
460 # command was, in fact, run. This handles the case where
461 # no commands remain to run after it, communicating to
462 # future dh instances that the specified command should not
464 write_log($sequence[$startpoint{$package}-1], $package);
466 elsif ($dh{REMAINING}) {
467 # Start at the beginning so all remaining commands will get
469 $startpoint{$package}=0;
472 # Find the last logged command that is in the sequence, and
473 # continue with the next command after it. If no logged
474 # command is in the sequence, we're starting at the beginning..
475 $startpoint{$package}=0;
476 COMMAND: foreach my $command (reverse @log) {
477 foreach my $i (0..$#sequence) {
478 if ($command eq $sequence[$i]) {
479 $startpoint{$package}=$i+1;
487 # Figure out what point in the sequence to go to.
488 my $stoppoint=$#sequence;
490 $stoppoint=command_pos($dh{UNTIL}, @sequence);
492 elsif ($dh{BEFORE}) {
493 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
496 # Now run the commands in the sequence.
497 foreach my $i (0..$stoppoint) {
498 # Figure out which packages need to run this command.
500 foreach my $package (@packages) {
501 if ($startpoint{$package} > $i ||
502 $logged{$package}{$sequence[$i]}) {
503 push @exclude, $package;
507 if (@exclude eq @packages) {
508 # Command already done for all packages.
512 run($sequence[$i], \@packages, \@exclude, @options);
517 my @packages=@{shift()};
518 my @exclude=@{shift()};
521 # If some packages are excluded, add flags
522 # to prevent them from being acted on.
523 push @options, map { "-N$_" } @exclude;
525 # Check for override targets in debian/rules and
526 # run them instead of running the command directly.
527 my $override_command;
528 if (rules_explicit_target("override_".$command)) {
529 $override_command=$command;
530 # This passes the options through to commands called
532 $ENV{DH_INTERNAL_OPTIONS}=join("\x1e", @options);
533 $command="debian/rules";
534 @options="override_".$override_command;
537 # Pass additional command options if any
538 unshift @options, @{$command_opts{$command}} if exists $command_opts{$command};
541 # 3 space indent lines the command being run up under the
542 # sequence name after "dh ".
543 print " ".escape_shell($command, @options)."\n";
546 my $ret=system($command, @options);
547 if ($ret >> 8 != 0) {
554 if (defined $override_command) {
555 delete $ENV{DH_INTERNAL_OPTIONS};
556 # Need to handle logging for overriden commands here,
557 # because the actual debhelper command may not have
558 # been run by the rules file target.
559 # (But avoid logging for dh_clean since it removes
561 if ($override_command ne 'dh_clean') {
562 my %packages=map { $_ => 1 } @packages;
563 map { delete $packages{$_} } @exclude;
564 write_log($override_command, keys %packages);
574 sub rules_explicit_target {
575 # Checks if a specified target exists as an explicit target
579 if (! $rules_parsed) {
580 my $processing_targets = 0;
581 my $not_a_target = 0;
582 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
584 if ($processing_targets) {
585 if (/^# Not a target:/) {
589 if (!$not_a_target && /^([^#:]+)::?/) {
591 # NOTE: if it is a depenency
592 # of .PHONY it will be
593 # defined too but that's ok.
596 # "Not a target:" is always followed by
597 # a target name, so resetting this one
601 } elsif (/^# Files$/) {
602 $processing_targets = 1;
609 return exists $targets{$target};
618 This program is a part of debhelper.
622 Joey Hess <joeyh@debian.org>