5 dh - debhelper command sequencer
10 use Debian::Debhelper::Dh_Lib;
15 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>>]
19 dh runs a sequence of debhelper commands. The supported sequences
20 correspond to the targets of a debian/rules file: "build", "clean",
21 "install", "binary-arch", "binary-indep", and "binary".
23 Commands in the binary-indep sequence are passed the "-i" option to ensure
24 they only work on binary independent packages, and commands in the
25 binary-arch sequences are passed the "-a" option to ensure they only work
26 on architecture dependent packages.
28 Each debhelper command will record when it's successfully run in
29 debian/package.debhelper.log. (Which dh_clean deletes.) So dh can tell
30 which commands have already been run, for which packages, and skip running
33 Each time dh is run, it examines the log, and finds the last logged command
34 that is in the specified sequence. It then continues with the next command
35 in the sequence. The B<--until>, B<--before>, B<--after>, and B<--remaining>
36 options can override this behavior.
38 If debian/rules contains a target with a name like "override_I<dh_command>",
39 then when it gets to that command in the sequence, dh will run that
40 target from the rules file, rather than running the actual command. The
41 override target can then run the command with additional options, or run
42 entirely different commands instead. (Note that to use this feature,
43 you should Build-Depend on debhelper 7.0.50 or above.)
49 =item B<--with> I<addon>[,I<addon>,...]
51 Add the debhelper commands specified by the given addon to appropriate places
52 in the sequence of commands that is run. This option can be repeated more
53 than once, or multiple addons can be listed, separated by commas.
54 This is used when there is a third-party package that provides
55 debhelper commands. See the PROGRAMMING file for documentation about
56 the sequence addon interface.
58 =item B<--without> I<addon>
60 The inverse of --with, disables using the given addon.
62 =item B<--list>, B<-l>
64 List all available addons.
66 =item B<--until> I<cmd>
68 Run commands in the sequence until and including I<cmd>, then stop.
70 =item B<--before> I<cmd>
72 Run commands in the sequence before I<cmd>, then stop.
74 =item B<--after> I<cmd>
76 Run commands in the sequence that come after I<cmd>.
80 Run all commands in the sequence that have yet to be run.
84 All other options passed to dh are passed on to each command it runs. This
85 can be used to set an option like "-v" or "-X" or "-N", as well as for more
88 =head1 COMMAND SPECIFICATION
90 I<cmd> can be a full name of a debhelper command, or a substring. It'll first
91 search for a command in the sequence exactly matching the name, to avoid any
92 ambiguity. If there are multiple substring matches, the last one in the
93 sequence will be used.
101 foreach my $i (0..$#sequence) {
102 if ($command eq $sequence[$i]) {
108 foreach my $i (0..$#sequence) {
109 if ($sequence[$i] =~ /\Q$command\E/) {
114 error "command specification \"$command\" does not match any command in the sequence"
123 To see what commands are included in a sequence, without actually doing
126 dh binary-arch --no-act
128 This is a very simple rules file, for packages where the default sequences of
129 commands work with no additional options.
135 Often you'll want to pass an option to a specific debhelper command. The
136 easy way to do with is by adding an override target for that command.
145 override_dh_installdocs:
146 dh_installdocs README TODO
148 Sometimes the automated dh_auto_configure and dh_auto_build can't guess
149 what to do for a strange package. Here's how to avoid running either
150 and instead run your own commands.
156 override_dh_auto_configure:
159 override_dh_auto_build:
160 make universe-explode-in-delight
162 Another common case is wanting to do something manually before or
163 after a particular debhelper command is run.
169 override_dh_fixperms:
171 chmod 4755 debian/foo/usr/bin/foo
173 If your package is a python package, dh will use dh_pysupport by
174 default. This is how to use dh_pycentral instead.
178 dh --with python-central $@
180 To patch your package using quilt, you can tell dh to use quilt's dh
181 sequence addons like this:
187 Here is an example of overriding where the dh_auto_* commands find
188 the package's source, for a package where the source is located in a
189 subdirectory. It also forces use of perl's Module::Build build system,
190 which can be necessary if debhelper wrongly detects that the package
195 dh --sourcedirectory=src --buildsystem=perl_build $@
199 # Stash this away before init modifies it.
202 # python-support is enabled by default, at least for now
203 # (and comes first so python-central loads later and can disable it).
204 unshift @ARGV, "--with=python-support";
206 # Disable complaints about unknown options for both dh and the commands
207 # it runs. This is done because dh accepts and passes on options that may
208 # be specific to only some debhelper commands.
209 $ENV{DH_IGNORE_UNKNOWN_OPTIONS}=1;
212 "until=s" => \$dh{UNTIL},
213 "after=s" => \$dh{AFTER},
214 "before=s" => \$dh{BEFORE},
215 "remaining" => \$dh{REMAINING},
217 my ($option,$value)=@_;
218 push @{$dh{WITH}},split(",", $value);
221 my ($option,$value)=@_;
222 @{$dh{WITH}} = grep { $_ ne $value } @{$dh{WITH}};
225 "list" => \$dh{LIST},
229 # Definitions of sequences.
231 $sequences{build} = [qw{
237 $sequences{clean} = [qw{
242 $sequences{install} = [@{$sequences{build}}, qw{
289 $sequences{'binary-indep'} = [@{$sequences{install}}, @b];
290 $sequences{binary} = [@{$sequences{install}}, qw{
295 $sequences{'binary-arch'} = [@{$sequences{binary}}];
297 # sequence addon interface
302 foreach my $sequence (keys %sequences) {
303 my @list=@{$sequences{$sequence}};
304 next unless grep $existing, @list;
306 foreach my $command (@list) {
307 if ($command eq $existing) {
308 push @new, $new if $offset < 0;
310 push @new, $new if $offset > 0;
316 $sequences{$sequence}=\@new;
327 foreach my $sequence (keys %sequences) {
328 $sequences{$sequence}=[grep { $_ ne $command } @{$sequences{$sequence}}];
335 unshift @{$sequences{$sequence}}, $command;
342 my $path = File::Spec->catdir($inc, "Debian/Debhelper/Sequence");
344 for my $module_path (glob "$path/*.pm") {
345 my $name = basename($module_path);
353 for my $name (sort keys %addons) {
360 foreach my $addon (@{$dh{WITH}}) {
361 my $mod="Debian::Debhelper::Sequence::$addon";
365 error("--with $addon not supported or failed to load module $mod");
369 # Get the sequence of commands to run.
371 error "specify a sequence to run";
374 if ($sequence eq 'debian/rules' ||
375 $sequence =~ /^override_dh_/) {
376 # make -B causes the rules file to be run as a target
377 # and support completly empty override targets
380 elsif (! exists $sequences{$sequence}) {
381 error "Unknown sequence $sequence (choose from: ".
382 join(" ", sort keys %sequences).")";
384 my @sequence=@{$sequences{$sequence}};
386 # The list of all packages that can be acted on.
387 my @packages=@{$dh{DOPACKAGES}};
389 # Get the options to pass to commands in the sequence.
390 # Filter out options intended only for this program.
392 if ($sequence eq 'binary-arch') {
394 # as an optimisation, remove from the list any packages
395 # that are not arch dependent
396 my %arch_packages = map { $_ => 1 } getpackages("arch");
397 @packages = grep { $arch_packages{$_} } @packages;
399 elsif ($sequence eq 'binary-indep') {
401 # ditto optimisation for arch indep
402 my %indep_packages = map { $_ => 1 } getpackages("indep");
403 @packages = grep { $indep_packages{$_} } @packages;
406 my $opt=shift @ARGV_orig;
407 next if $opt eq $sequence;
408 if ($opt =~ /^--?(after|until|before|with|without)$/) {
412 elsif ($opt =~ /^--?(no-act|remaining|(after|until|before|with|without)=)/) {
418 # Figure out at what point in the sequence to start for each package.
421 foreach my $package (@packages) {
422 my @log=load_log($package, \%logged);
424 # Run commands in the sequence that come after the
426 $startpoint{$package}=command_pos($dh{AFTER}, @sequence) + 1;
427 # Write a dummy log entry indicating that the specified
428 # command was, in fact, run. This handles the case where
429 # no commands remain to run after it, communicating to
430 # future dh instances that the specified command should not
432 write_log($sequence[$startpoint{$package}-1], $package);
434 elsif ($dh{REMAINING}) {
435 # Start at the beginning so all remaining commands will get
437 $startpoint{$package}=0;
440 # Find the last logged command that is in the sequence, and
441 # continue with the next command after it. If no logged
442 # command is in the sequence, we're starting at the beginning..
443 $startpoint{$package}=0;
444 COMMAND: foreach my $command (reverse @log) {
445 foreach my $i (0..$#sequence) {
446 if ($command eq $sequence[$i]) {
447 $startpoint{$package}=$i+1;
455 # Figure out what point in the sequence to go to.
456 my $stoppoint=$#sequence;
458 $stoppoint=command_pos($dh{UNTIL}, @sequence);
460 elsif ($dh{BEFORE}) {
461 $stoppoint=command_pos($dh{BEFORE}, @sequence) - 1;
464 # Now run the commands in the sequence.
465 foreach my $i (0..$stoppoint) {
466 # Figure out which packages need to run this command.
468 foreach my $package (@packages) {
469 if ($startpoint{$package} > $i ||
470 $logged{$package}{$sequence[$i]}) {
471 push @exclude, $package;
475 if (@exclude eq @packages) {
476 # Command already done for all packages.
480 run($sequence[$i], \@packages, \@exclude, @options);
485 my @packages=@{shift()};
486 my @exclude=@{shift()};
489 # If some packages are excluded, add flags
490 # to prevent them from being acted on.
491 push @options, map { "-N$_" } @exclude;
493 # Check for override targets in debian/rules and
494 # run them instead of running the command directly.
495 my $override_command;
496 if (rules_explicit_target("override_".$command)) {
497 $override_command=$command;
498 # This passes the options through to commands called
500 $ENV{DH_INTERNAL_OPTIONS}=join("\x1e", @options);
501 $command="debian/rules";
502 @options="override_".$override_command;
505 # 3 space indent lines the command being run up under the
506 # sequence name after "dh ".
507 print " ".escape_shell($command, @options)."\n";
510 my $ret=system($command, @options);
511 if ($ret >> 8 != 0) {
518 if (defined $override_command) {
519 delete $ENV{DH_INTERNAL_OPTIONS};
520 # Need to handle logging for overriden commands here,
521 # because the actual debhelper command may not have
522 # been run by the rules file target.
523 # (But avoid logging for dh_clean since it removes
525 if ($override_command ne 'dh_clean') {
526 my %packages=map { $_ => 1 } @packages;
527 map { delete $packages{$_} } @exclude;
528 write_log($override_command, keys %packages);
538 sub rules_explicit_target {
539 # Checks if a specified target exists as an explicit target
543 if (! $rules_parsed) {
544 my $processing_targets = 0;
545 my $not_a_target = 0;
546 open(MAKE, "LC_ALL=C make -Rrnpsf debian/rules debhelper-fail-me 2>/dev/null |");
548 if ($processing_targets) {
549 if (/^# Not a target:/) {
553 if (!$not_a_target && /^([^#:]+)::?/) {
555 # NOTE: if it is a depenency
556 # of .PHONY it will be
557 # defined too but that's ok.
560 # "Not a target:" is always followed by
561 # a target name, so resetting this one
565 } elsif (/^# Files$/) {
566 $processing_targets = 1;
573 return exists $targets{$target};
582 This program is a part of debhelper.
586 Joey Hess <joeyh@debian.org>