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>.
100 foreach my $i (0..$#sequence) {
101 if ($command eq $sequence[$i]) {
107 foreach my $i (0..$#sequence) {
108 if ($sequence[$i] =~ /\Q$command\E/) {
113 error "command specification \"$command\" does not match any command in the sequence"
122 To see what commands are included in a sequence, without actually doing
125 dh binary-arch --no-act
127 This is a very simple rules file, for packages where the default seqences of
128 commands work with no additional options.
134 This is a simple rules file that is a good starting place for customisation.
135 (It's also available in F</usr/share/doc/debhelper/examples/rules.simple>
151 binary-indep: install
154 binary: binary-arch binary-indep
156 Often you'll want to pass an option to ./configure. This uses dh to run all
157 commands before L<dh_auto_configure(1)>, then runs that command by hand,
158 and then finished up by running the rest of the sequence. You could also
159 run ./configure by hand, instead of bothering with using dh_auto_configure.
160 And if necessary, you can add commands to run automake, etc here too.
163 dh build --before configure
164 dh_auto_configure --kitchen-sink=yes
165 dh build --after configure
167 Here's how to skip two automated in a row (configure and build), and
168 instead run the commands by hand.
171 dh build --before configure
173 make universe-explode-in-delight
174 dh build --after build
176 Another common case is wanting to run some code manually after a particular
177 debhelper command is run.
180 dh install --until dh_fixperms
181 # dh_fixperms has run, now override it for one program
182 chmod 4755 debian/foo/usr/bin/foo
184 dh install --after dh_fixperms
186 It's also fine to run debhelper commands early. Just make sure that at
187 least dh_prep is run from the squence first, and be sure to use the
188 B<--remaining> option to ensure that commands that normally come before
189 those in the sequence are still run.
192 dh install --until dh_prep
193 dh_installdocs README TODO
194 dh_installchangelogs Changes
195 dh install --remaining
199 dh binary-arch --remaining
203 # Stash this away before init modifies it.
209 # Definitions of sequences.
211 $sequences{build} = [qw{
217 $sequences{clean} = [qw{
222 $sequences{install} = [@{$sequences{build}}, qw{
270 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
271 $sequences{binary} = [@{$sequences{install}}, qw{
276 $sequences{'binary-arch'} = [@{$sequences{binary}}];
278 # --with python-support is enabled by default, at least for now
279 push @{$dh{WITH}}, "python-support";
281 # sequence addon interface
286 foreach my $sequence (keys %sequences) {
287 my @list=@{$sequences{$sequence}};
288 next unless grep $existing, @list;
290 foreach my $command (@list) {
291 if ($command eq $existing) {
292 push @new, $new if $offset < 0;
294 push @new, $new if $offset > 0;
300 $sequences{$sequence}=\@new;
309 foreach my $addon (@{$dh{WITH}}) {
310 my $mod="Debian::Debhelper::Sequence::$addon";
314 error("--with $addon not supported or failed to load module $mod");
318 # Get the sequence of commands to run.
320 error "specify a sequence to run";
323 if (! exists $sequences{$sequence}) {
324 error "Unknown sequence $sequence (chose from: ".
325 join(" ", sort keys %sequences).")";
327 my @sequence=@{$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)$/) {
355 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before)=)/) {
361 # Figure out at what point in the sequence to start for each package.
364 foreach my $package (@packages) {
365 my @log=loadlog($package);
367 # Run commands in the sequence that come after the
369 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
370 # Write a dummy log entry indicating that the specified
371 # command was, in fact, run. This handles the case where
372 # no commands remain to run after it, communicating to
373 # future dh instances that the specified command should not
375 writelog($package, $sequence[$startpoint{$package}-1]);
377 elsif ($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, $package;
418 if (@exclude eq @packages) {
419 # Command already done for all packages.
423 # Run command for all packages.
424 run($sequence[$i], @options);
427 # Run command for only a subset of packages.
428 run($sequence[$i], @options,
429 map { "-N$_" } @exclude);
437 # 3 space indent lines the command being run up under the
438 # sequence name after "dh ".
439 print " ".escape_shell($command, @options)."\n";
442 my $ret=system($command, @options);
443 if ($ret >> 8 != 0) {
454 my $ext=pkgext($package);
457 open(LOG, "<", "debian/${ext}debhelper.log") || return;
461 $logged{$package}{$_}=1;
470 my $ext=pkgext($package);
472 open(LOG, ">>", "debian/${ext}debhelper.log") || error("failed to write to log");
481 This program is a part of debhelper.
485 Joey Hess <joeyh@debian.org>