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<--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 All other options passed to dh are passed on to each command it runs. This
75 can be used to set an option like "-v" or "-X" or "-N", as well as for more
78 =head1 COMMAND SPECIFICATION
80 I<cmd> can be a full name of a debhelper command, or a substring. It'll first
81 search for a command in the sequence exactly matching the name, to avoid any
82 ambiguity. If there are multiple substring matches, the last one in the
83 sequence will be used.
91 foreach my $i (0..$#sequence) {
92 if ($command eq $sequence[$i]) {
98 foreach my $i (0..$#sequence) {
99 if ($sequence[$i] =~ /\Q$command\E/) {
104 error "command specification \"$command\" does not match any command in the sequence"
113 To see what commands are included in a sequence, without actually doing
116 dh binary-arch --no-act
118 This is a very simple rules file, for packages where the default sequences of
119 commands work with no additional options.
125 Often you'll want to pass an option to a specific debhelper command. The
126 easy way to do with is by adding an override target for that command.
135 override_dh_installdocs:
136 dh_installdocs README TODO
138 Sometimes the automated dh_auto_configure and dh_auto_build can't guess
139 what to do for a strange package. Here's how to avoid running either
140 and instead run your own commands.
146 override_dh_auto_configure:
149 override_dh_auto_build:
150 make universe-explode-in-delight
152 Another common case is wanting to do something manually before or
153 after a particular debhelper command is run.
159 override_dh_fixperms:
161 chmod 4755 debian/foo/usr/bin/foo
163 If your package is a python package, dh will use dh_pysupport by
164 default. This is how to use dh_pycentral instead.
168 dh --with python-central $@
172 # Stash this away before init modifies it.
176 "until=s" => \$dh{UNTIL},
177 "after=s" => \$dh{AFTER},
178 "before=s" => \$dh{BEFORE},
179 "remaining" => \$dh{REMAINING},
181 my ($option,$value)=@_;
182 push @{$dh{WITH}},$value;
187 # Definitions of sequences.
189 $sequences{build} = [qw{
195 $sequences{clean} = [qw{
200 $sequences{install} = [@{$sequences{build}}, qw{
248 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
249 $sequences{binary} = [@{$sequences{install}}, qw{
254 $sequences{'binary-arch'} = [@{$sequences{binary}}];
256 # --with python-support is enabled by default, at least for now
257 unshift @{$dh{WITH}}, "python-support";
259 # sequence addon interface
264 foreach my $sequence (keys %sequences) {
265 my @list=@{$sequences{$sequence}};
266 next unless grep $existing, @list;
268 foreach my $command (@list) {
269 if ($command eq $existing) {
270 push @new, $new if $offset < 0;
272 push @new, $new if $offset > 0;
278 $sequences{$sequence}=\@new;
289 foreach my $sequence (keys %sequences) {
290 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
294 foreach my $addon (@{$dh{WITH}}) {
295 my $mod="Debian::Debhelper::Sequence::$addon";
299 error("--with $addon not supported or failed to load module $mod");
303 # Get the sequence of commands to run.
305 error "specify a sequence to run";
308 if ($sequence eq 'debian/rules' ||
309 $sequence =~ /^override_dh_/) {
310 # make -B causes the rules file to be run as a target
311 # and support completly empty override targets
314 elsif (! exists $sequences{$sequence}) {
315 error "Unknown sequence $sequence (choose from: ".
316 join(" ", sort keys %sequences).")";
318 my @sequence=@{$sequences{$sequence}};
320 # The list of all packages that can be acted on.
321 my @packages=@{$dh{DOPACKAGES}};
323 # Get the options to pass to commands in the sequence.
324 # Filter out options intended only for this program.
326 if ($sequence eq 'binary-arch') {
328 # as an optimisation, remove from the list any packages
329 # that are not arch dependent
330 my %arch_packages = map { $_ => 1 } getpackages("arch");
331 @packages = grep { $arch_packages{$_} } @packages;
333 elsif ($sequence eq 'binary-indep') {
335 # ditto optimisation for arch indep
336 my %indep_packages = map { $_ => 1 } getpackages("indep");
337 @packages = grep { $indep_packages{$_} } @packages;
340 my $opt=shift @ARGV_orig;
341 next if $opt eq $sequence;
342 if ($opt =~ /^--?(after|until|before|with)$/) {
346 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with)=)/) {
352 # Figure out at what point in the sequence to start for each package.
355 foreach my $package (@packages) {
356 my @log=load_log($package, \%logged);
358 # Run commands in the sequence that come after the
360 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
361 # Write a dummy log entry indicating that the specified
362 # command was, in fact, run. This handles the case where
363 # no commands remain to run after it, communicating to
364 # future dh instances that the specified command should not
366 write_log($sequence[$startpoint{$package}-1], $package);
368 elsif ($dh{REMAINING}) {
369 # Start at the beginning so all remaining commands will get
371 $startpoint{$package}=0;
374 # Find the last logged command that is in the sequence, and
375 # continue with the next command after it. If no logged
376 # command is in the sequence, we're starting at the beginning..
377 $startpoint{$package}=0;
378 COMMAND: foreach my $command (reverse @log) {
379 foreach my $i (0..$#sequence) {
380 if ($command eq $sequence[$i]) {
381 $startpoint{$package}=$i+1;
389 # Figure out what point in the sequence to go to.
390 my $stoppoint=$#sequence;
392 $stoppoint=command_pos($dh{UNTIL}, @sequence);
394 elsif ($dh{BEFORE}) {
395 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
398 # Now run the commands in the sequence.
399 foreach my $i (0..$stoppoint) {
400 # Figure out which packages need to run this command.
402 foreach my $package (@packages) {
403 if ($startpoint{$package} > $i ||
404 $logged{$package}{$sequence[$i]}) {
405 push @exclude, $package;
409 if (@exclude eq @packages) {
410 # Command already done for all packages.
414 run($sequence[$i], \@packages, \@exclude, @options);
419 my @packages=@{shift()};
420 my @exclude=@{shift()};
423 # If some packages are excluded, add flags
424 # to prevent them from being acted on.
425 push @options, map { "-N$_" } @exclude;
427 # Check for override targets in debian/rules and
428 # run them instead of running the command directly.
429 my $override_command;
430 if (rules_explicit_target("override_".$command)) {
431 $override_command=$command;
432 # This passes the options through to commands called
434 $ENV{DH_INTERNAL_OPTIONS}=join(" ", @options);
435 $command="debian/rules";
436 @options="override_".$override_command;
439 # 3 space indent lines the command being run up under the
440 # sequence name after "dh ".
441 print " ".escape_shell($command, @options)."\n";
444 my $ret=system($command, @options);
445 if ($ret >> 8 != 0) {
452 if (defined $override_command) {
453 delete $ENV{DH_INTERNAL_OPTIONS};
454 # Need to handle logging for overriden commands here,
455 # because the actual debhelper command may not have
456 # been run by the rules file target.
457 my %packages=map { $_ => 1 } @packages;
458 map { delete $packages{$_} } @exclude;
459 write_log($override_command, keys %packages);
468 sub rules_explicit_target {
469 # Checks if a specified target exists as an explicit target
473 if (! $rules_parsed) {
474 my $processing_targets = 0;
475 my $not_a_target = 0;
476 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
478 if ($processing_targets) {
479 if (/^# Not a target:/) {
483 if (!$not_a_target && /^([^#:]+)::?/) {
485 # NOTE: if it is a depenency
486 # of .PHONY it will be
487 # defined too but that's ok.
490 # "Not a target:" is always followed by
491 # a target name, so resetting this one
495 } elsif (/^# Files$/) {
496 $processing_targets = 1;
503 return exists $targets{$target};
512 This program is a part of debhelper.
516 Joey Hess <joeyh@debian.org>