5 dh - debhelper command sequencer
10 use Debian::Debhelper::Dh_Lib;
14 B<dh> sequence [B<--with> I<addon>] [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 gets to that command in the sequence, dh will run that
39 target from the rules file, rather than running the actual command. The
40 override target can then run the command with additional options, or run
41 entirely different commands instead. (Note that to use this feature,
42 you should Build-Depend on debhelper 7.0.50 or above.)
48 =item B<--with> I<addon>
50 Add the debhelper commands specified by the given addon to appropriate places
51 in the sequence of commands that is run. This option can be repeated more
52 than once, and 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<--until> I<cmd>
62 Run commands in the sequence until and including I<cmd>, then stop.
64 =item B<--before> I<cmd>
66 Run commands in the sequence before I<cmd>, then stop.
68 =item B<--after> I<cmd>
70 Run commands in the sequence that come after I<cmd>.
74 Run all commands in the sequence that have yet to be run.
78 All other options passed to dh are passed on to each command it runs. This
79 can be used to set an option like "-v" or "-X" or "-N", as well as for more
82 =head1 COMMAND SPECIFICATION
84 I<cmd> can be a full name of a debhelper command, or a substring. It'll first
85 search for a command in the sequence exactly matching the name, to avoid any
86 ambiguity. If there are multiple substring matches, the last one in the
87 sequence will be used.
95 foreach my $i (0..$#sequence) {
96 if ($command eq $sequence[$i]) {
102 foreach my $i (0..$#sequence) {
103 if ($sequence[$i] =~ /\Q$command\E/) {
108 error "command specification \"$command\" does not match any command in the sequence"
117 To see what commands are included in a sequence, without actually doing
120 dh binary-arch --no-act
122 This is a very simple rules file, for packages where the default sequences of
123 commands work with no additional options.
129 Often you'll want to pass an option to a specific debhelper command. The
130 easy way to do with is by adding an override target for that command.
139 override_dh_installdocs:
140 dh_installdocs README TODO
142 Sometimes the automated dh_auto_configure and dh_auto_build can't guess
143 what to do for a strange package. Here's how to avoid running either
144 and instead run your own commands.
150 override_dh_auto_configure:
153 override_dh_auto_build:
154 make universe-explode-in-delight
156 Another common case is wanting to do something manually before or
157 after a particular debhelper command is run.
163 override_dh_fixperms:
165 chmod 4755 debian/foo/usr/bin/foo
167 If your package is a python package, dh will use dh_pysupport by
168 default. This is how to use dh_pycentral instead.
172 dh --with python-central $@
176 # Stash this away before init modifies it.
179 # python-support is enabled by default, at least for now
180 # (and comes first so python-central loads later and can disable it).
181 unshift @ARGV, "--with=python-support";
184 "until=s" => \$dh{UNTIL},
185 "after=s" => \$dh{AFTER},
186 "before=s" => \$dh{BEFORE},
187 "remaining" => \$dh{REMAINING},
189 my ($option,$value)=@_;
190 push @{$dh{WITH}},$value;
193 my ($option,$value)=@_;
194 @{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
199 # Definitions of sequences.
201 $sequences{build} = [qw{
207 $sequences{clean} = [qw{
212 $sequences{install} = [@{$sequences{build}}, qw{
260 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
261 $sequences{binary} = [@{$sequences{install}}, qw{
266 $sequences{'binary-arch'} = [@{$sequences{binary}}];
268 # sequence addon interface
273 foreach my $sequence (keys %sequences) {
274 my @list=@{$sequences{$sequence}};
275 next unless grep $existing, @list;
277 foreach my $command (@list) {
278 if ($command eq $existing) {
279 push @new, $new if $offset < 0;
281 push @new, $new if $offset > 0;
287 $sequences{$sequence}=\@new;
298 foreach my $sequence (keys %sequences) {
299 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
303 foreach my $addon (@{$dh{WITH}}) {
304 my $mod="Debian::Debhelper::Sequence::$addon";
308 error("--with $addon not supported or failed to load module $mod");
312 # Get the sequence of commands to run.
314 error "specify a sequence to run";
317 if ($sequence eq 'debian/rules' ||
318 $sequence =~ /^override_dh_/) {
319 # make -B causes the rules file to be run as a target
320 # and support completly empty override targets
323 elsif (! exists $sequences{$sequence}) {
324 error "Unknown sequence $sequence (choose from: ".
325 join(" ", sort keys %sequences).")";
327 my @sequence=@{$sequences{$sequence}};
329 # The list of all packages that can be acted on.
330 my @packages=@{$dh{DOPACKAGES}};
332 # Get the options to pass to commands in the sequence.
333 # Filter out options intended only for this program.
335 if ($sequence eq 'binary-arch') {
337 # as an optimisation, remove from the list any packages
338 # that are not arch dependent
339 my %arch_packages = map { $_ => 1 } getpackages("arch");
340 @packages = grep { $arch_packages{$_} } @packages;
342 elsif ($sequence eq 'binary-indep') {
344 # ditto optimisation for arch indep
345 my %indep_packages = map { $_ => 1 } getpackages("indep");
346 @packages = grep { $indep_packages{$_} } @packages;
349 my $opt=shift @ARGV_orig;
350 next if $opt eq $sequence;
351 if ($opt =~ /^--?(after|until|before|with|without)$/) {
355 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with|without)=)/) {
361 # Figure out at what point in the sequence to start for each package.
364 foreach my $package (@packages) {
365 my @log=load_log($package, \%logged);
367 # Run commands in the sequence that come after the
369 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
370 # Write a dummy log entry indicating that the specified
371 # command was, in fact, run. This handles the case where
372 # no commands remain to run after it, communicating to
373 # future dh instances that the specified command should not
375 write_log($sequence[$startpoint{$package}-1], $package);
377 elsif ($dh{REMAINING}) {
378 # Start at the beginning so all remaining commands will get
380 $startpoint{$package}=0;
383 # Find the last logged command that is in the sequence, and
384 # continue with the next command after it. If no logged
385 # command is in the sequence, we're starting at the beginning..
386 $startpoint{$package}=0;
387 COMMAND: foreach my $command (reverse @log) {
388 foreach my $i (0..$#sequence) {
389 if ($command eq $sequence[$i]) {
390 $startpoint{$package}=$i+1;
398 # Figure out what point in the sequence to go to.
399 my $stoppoint=$#sequence;
401 $stoppoint=command_pos($dh{UNTIL}, @sequence);
403 elsif ($dh{BEFORE}) {
404 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
407 # Now run the commands in the sequence.
408 foreach my $i (0..$stoppoint) {
409 # Figure out which packages need to run this command.
411 foreach my $package (@packages) {
412 if ($startpoint{$package} > $i ||
413 $logged{$package}{$sequence[$i]}) {
414 push @exclude, $package;
418 if (@exclude eq @packages) {
419 # Command already done for all packages.
423 run($sequence[$i], \@packages, \@exclude, @options);
428 my @packages=@{shift()};
429 my @exclude=@{shift()};
432 # If some packages are excluded, add flags
433 # to prevent them from being acted on.
434 push @options, map { "-N$_" } @exclude;
436 # Check for override targets in debian/rules and
437 # run them instead of running the command directly.
438 my $override_command;
439 if (rules_explicit_target("override_".$command)) {
440 $override_command=$command;
441 # This passes the options through to commands called
443 $ENV{DH_INTERNAL_OPTIONS}=join(" ", @options);
444 $command="debian/rules";
445 @options="override_".$override_command;
448 # 3 space indent lines the command being run up under the
449 # sequence name after "dh ".
450 print " ".escape_shell($command, @options)."\n";
453 my $ret=system($command, @options);
454 if ($ret >> 8 != 0) {
461 if (defined $override_command) {
462 delete $ENV{DH_INTERNAL_OPTIONS};
463 # Need to handle logging for overriden commands here,
464 # because the actual debhelper command may not have
465 # been run by the rules file target.
466 my %packages=map { $_ => 1 } @packages;
467 map { delete $packages{$_} } @exclude;
468 write_log($override_command, keys %packages);
477 sub rules_explicit_target {
478 # Checks if a specified target exists as an explicit target
482 if (! $rules_parsed) {
483 my $processing_targets = 0;
484 my $not_a_target = 0;
485 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
487 if ($processing_targets) {
488 if (/^# Not a target:/) {
492 if (!$not_a_target && /^([^#:]+)::?/) {
494 # NOTE: if it is a depenency
495 # of .PHONY it will be
496 # defined too but that's ok.
499 # "Not a target:" is always followed by
500 # a target name, so resetting this one
504 } elsif (/^# Files$/) {
505 $processing_targets = 1;
512 return exists $targets{$target};
521 This program is a part of debhelper.
525 Joey Hess <joeyh@debian.org>