5 dh - debhelper command sequencer
10 use Debian::Debhelper::Dh_Lib;
14 B<dh> sequence [B<--until> I<cmd>] [B<--before> I<cmd>] [B<--after> I<cmd>] [B<--remaining>] [B<--with> I<addon>] [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.
41 =item B<--until> I<cmd>
43 Run commands in the sequence until and including I<cmd>, then stop.
45 =item B<--before> I<cmd>
47 Run commands in the sequence before I<cmd>, then stop.
49 =item B<--after> I<cmd>
51 Run commands in the sequence that come after I<cmd>.
55 Run all commands in the sequence that have yet to be run.
57 =item B<--with> I<addon>
59 Add the debhelper commands specified by the given addon to appropriate places
60 in the sequence of commands that is run. This option can be repeated more
61 than once, and is used when there is a third-party package that provides
62 debhelper commands. See "SEQUENCE ADDONS" below for documentation about what
63 such packages should do to be supported by --with.
67 All other options passed to dh are passed on to each command it runs. This
68 can be used to set an option like "-v" or "-X" or "-N", as well as for more
71 =head1 COMMAND SPECIFICATION
73 I<cmd> can be a full name of a debhelper command, or a substring. It'll first
74 search for a command in the sequence exactly matching the name, to avoid any
75 ambiguity. If there are multiple substring matches, the last one in the
76 sequence will be used.
78 =head1 SEQUENCE ADDONS
80 When B<--with> I<addon> is used, dh loads the perl module
81 Debian::Debhelper::Sequence::I<addon>. Two functions are provided to let
82 the module add its commands to sequences:
86 =item Debian::Debhelper::Dh_Lib::insert_before(existing_command, new_command)
88 Insert I<new_command> in sequences before I<existing_command>.
90 =item Debian::Debhelper::Dh_Lib::insert_after(existing_command, new_command)
92 Insert I<new_command> in sequences after I<existing_command>.
94 =item Debian::Debhelper::Dh_Lib::remove_command(existing_command)
96 Remove I<existing_command> from the list of commands to run.
106 foreach my $i (0..$#sequence) {
107 if ($command eq $sequence[$i]) {
113 foreach my $i (0..$#sequence) {
114 if ($sequence[$i] =~ /\Q$command\E/) {
119 error "command specification \"$command\" does not match any command in the sequence"
128 To see what commands are included in a sequence, without actually doing
131 dh binary-arch --no-act
133 This is a very simple rules file, for packages where the default sequences of
134 commands work with no additional options.
140 This is a simple rules file that is a good starting place for customisation.
141 (It's also available in F</usr/share/doc/debhelper/examples/rules.simple>
157 binary-indep: install
160 binary: binary-arch binary-indep
162 Often you'll want to pass an option to ./configure. This uses dh to run all
163 commands before L<dh_auto_configure(1)>, then runs that command by hand,
164 and then finished up by running the rest of the sequence. You could also
165 run ./configure by hand, instead of bothering with using dh_auto_configure.
166 And if necessary, you can add commands to run automake, etc here too.
169 dh build --before configure
170 dh_auto_configure -- --kitchen-sink=yes
171 dh build --after configure
173 Here's how to skip two automated in a row (configure and build), and
174 instead run the commands by hand.
177 dh build --before configure
179 make universe-explode-in-delight
180 dh build --after build
182 Another common case is wanting to run some code manually after a particular
183 debhelper command is run.
186 dh install --until dh_fixperms
187 # dh_fixperms has run, now override it for one program
188 chmod 4755 debian/foo/usr/bin/foo
190 dh install --after dh_fixperms
192 It's also fine to run debhelper commands early. Just make sure that at
193 least dh_prep is run from the sequence first, and be sure to use the
194 B<--remaining> option to ensure that commands that normally come before
195 those in the sequence are still run.
198 dh install --until dh_prep
199 dh_installdocs README TODO
200 dh_installchangelogs Changes
201 dh install --remaining
205 dh binary-arch --remaining
209 # Stash this away before init modifies it.
215 # Definitions of sequences.
217 $sequences{build} = [qw{
223 $sequences{clean} = [qw{
228 $sequences{install} = [@{$sequences{build}}, qw{
276 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
277 $sequences{binary} = [@{$sequences{install}}, qw{
282 $sequences{'binary-arch'} = [@{$sequences{binary}}];
284 # --with python-support is enabled by default, at least for now
285 push @{$dh{WITH}}, "python-support";
287 # sequence addon interface
292 foreach my $sequence (keys %sequences) {
293 my @list=@{$sequences{$sequence}};
294 next unless grep $existing, @list;
296 foreach my $command (@list) {
297 if ($command eq $existing) {
298 push @new, $new if $offset < 0;
300 push @new, $new if $offset > 0;
306 $sequences{$sequence}=\@new;
317 foreach my $sequence (keys %sequences) {
318 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
322 foreach my $addon (@{$dh{WITH}}) {
323 my $mod="Debian::Debhelper::Sequence::$addon";
327 error("--with $addon not supported or failed to load module $mod");
331 # Get the sequence of commands to run.
333 error "specify a sequence to run";
336 if (! exists $sequences{$sequence}) {
337 error "Unknown sequence $sequence (chose from: ".
338 join(" ", sort keys %sequences).")";
340 my @sequence=@{$sequences{$sequence}};
342 # The list of all packages that can be acted on.
343 my @packages=@{$dh{DOPACKAGES}};
345 # Get the options to pass to commands in the sequence.
346 # Filter out options intended only for this program.
348 if ($sequence eq 'binary-arch') {
350 # as an optimisation, remove from the list any packages
351 # that are not arch dependent
352 my %arch_packages = map { $_ => 1 } getpackages("arch");
353 @packages = grep { $arch_packages{$_} } @packages;
355 elsif ($sequence eq 'binary-indep') {
357 # ditto optimisation for arch indep
358 my %indep_packages = map { $_ => 1 } getpackages("indep");
359 @packages = grep { $indep_packages{$_} } @packages;
362 my $opt=shift @ARGV_orig;
363 next if $opt eq $sequence;
364 if ($opt =~ /^--?(after|until|before)$/) {
368 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before)=)/) {
374 # Figure out at what point in the sequence to start for each package.
377 foreach my $package (@packages) {
378 my @log=loadlog($package);
380 # Run commands in the sequence that come after the
382 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
383 # Write a dummy log entry indicating that the specified
384 # command was, in fact, run. This handles the case where
385 # no commands remain to run after it, communicating to
386 # future dh instances that the specified command should not
388 writelog($package, $sequence[$startpoint{$package}-1]);
390 elsif ($dh{REMAINING}) {
391 # Start at the beginning so all remaining commands will get
393 $startpoint{$package}=0;
396 # Find the last logged command that is in the sequence, and
397 # continue with the next command after it. If no logged
398 # command is in the sequence, we're starting at the beginning..
399 $startpoint{$package}=0;
400 COMMAND: foreach my $command (reverse @log) {
401 foreach my $i (0..$#sequence) {
402 if ($command eq $sequence[$i]) {
403 $startpoint{$package}=$i+1;
411 # Figure out what point in the sequence to go to.
412 my $stoppoint=$#sequence;
414 $stoppoint=command_pos($dh{UNTIL}, @sequence);
416 elsif ($dh{BEFORE}) {
417 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
420 # Now run the commands in the sequence.
421 foreach my $i (0..$stoppoint) {
422 # Figure out which packages need to run this command.
424 foreach my $package (@packages) {
425 if ($startpoint{$package} > $i ||
426 $logged{$package}{$sequence[$i]}) {
427 push @exclude, $package;
431 if (@exclude eq @packages) {
432 # Command already done for all packages.
436 # Run command for all packages.
437 run($sequence[$i], @options);
440 # Run command for only a subset of packages.
441 run($sequence[$i], @options,
442 map { "-N$_" } @exclude);
450 # 3 space indent lines the command being run up under the
451 # sequence name after "dh ".
452 print " ".escape_shell($command, @options)."\n";
455 my $ret=system($command, @options);
456 if ($ret >> 8 != 0) {
467 my $ext=pkgext($package);
470 open(LOG, "<", "debian/${ext}debhelper.log") || return;
474 $logged{$package}{$_}=1;
483 my $ext=pkgext($package);
485 open(LOG, ">>", "debian/${ext}debhelper.log") || error("failed to write to log");
494 This program is a part of debhelper.
498 Joey Hess <joeyh@debian.org>