3 # Library functions for debhelper programs, perl version.
5 # Joey Hess, GPL copyright 1997-2000.
7 package Debian::Debhelper::Dh_Lib;
11 use vars qw(@ISA @EXPORT %dh);
13 @EXPORT=qw(&init &doit &complex_doit &verbose_print &error &warning &tmpdir
14 &pkgfile &pkgext &isnative &autoscript &filearray &GetPackages
15 &basename &dirname &xargs %dh &compat &addsubstvar &delsubstvar);
20 # If DH_OPTIONS is set, prepend it @ARGV.
21 if (defined($ENV{DH_OPTIONS})) {
22 unshift @ARGV,split(/\s+/,$ENV{DH_OPTIONS});
25 # Check to see if an argument on the command line starts with a dash.
26 # if so, we need to pass this off to the resource intensive
27 # Getopt::Long, which I'd prefer to avoid loading at all if possible.
30 foreach $arg (@ARGV) {
37 eval "use Debian::Debhelper::Dh_Getopt";
39 %dh=Debian::Debhelper::Dh_Getopt::parseopts();
42 # Check to see if DH_VERBOSE environment variable was set, if so,
43 # make sure verbose is on.
44 if (defined $ENV{DH_VERBOSE} && $ENV{DH_VERBOSE} ne "") {
48 # Check to see if DH_NO_ACT environment variable was set, if so,
49 # make sure no act mode is on.
50 if (defined $ENV{DH_NO_ACT} && $ENV{DH_NO_ACT} ne "") {
54 # Get the name of the main binary package (first one listed in
56 my @allpackages=GetPackages();
57 $dh{MAINPACKAGE}=$allpackages[0];
59 # Check if packages to build have been specified, if not, fall back to
60 # the default, doing them all.
61 if (! defined $dh{DOPACKAGES} || ! @{$dh{DOPACKAGES}}) {
62 if ($dh{DOINDEP} || $dh{DOARCH} || $dh{DOSAME}) {
63 error("You asked that all arch in(dep) packages be built, but there are none of that type.");
65 push @{$dh{DOPACKAGES}},@allpackages;
68 # Check to see if -P was specified. If so, we can only act on a single
70 if ($dh{TMPDIR} && $#{$dh{DOPACKAGES}} > 0) {
71 error("-P was specified, but multiple packages would be acted on (".join(",",@{$dh{DOPACKAGES}}).").");
74 # Figure out which package is the first one we were instructed to build.
75 # This package gets special treatement: files and directories specified on
76 # the command line may affect it.
77 $dh{FIRSTPACKAGE}=${$dh{DOPACKAGES}}[0];
80 # Pass it an array containing the arguments of a shell command like would
81 # be run by exec(). It turns that into a line like you might enter at the
82 # shell, escaping metacharacters and quoting qrguments that contain spaces.
87 foreach my $word (@args) {
89 # Escape only a few things since it will be quoted.
90 # Note we use double quotes because you cannot
91 # escape ' in qingle quotes, while " can be escaped
93 # This does make -V"foo bar" turn into "-Vfoo bar",
94 # but that will be parsed identically by the shell
96 $word=~s/([\n`\$"\\])/\$1/g;
97 push @ret, "\"$word\"";
100 # This list is from _Unix in a Nutshell_. (except '#')
101 $word=~s/([\s!"\$()*+#;<>?@\[\]\\`|~])/\\$1/g;
105 return join(' ', @ret);
108 # Run a command, and display the command to stdout if verbose mode is on.
109 # All commands that modifiy files in $TMP should be ran via this
112 # Note that this cannot handle complex commands, especially anything
113 # involving redirection. Use complex_doit instead.
115 verbose_print(escape_shell(@_));
118 system(@_) == 0 || error("command returned error code");
122 # Run a command and display the command to stdout if verbose mode is on.
123 # Use doit() if you can, instead of this function, because this function
124 # forks a shell. However, this function can handle more complicated stuff
127 verbose_print(join(" ",@_));
130 # The join makes system get a scalar so it forks off a shell.
131 system(join(" ",@_)) == 0
132 || error("command returned error code");
136 # Run a command that may have a huge number of arguments, like xargs does.
137 # Pass in a reference to an array containing the arguments, and then other
138 # parameters that are the command and any parameters that should be passed to
143 # The kernel can accept command lines up to 20k worth of characters.
144 my $command_max=20000; # LINUX SPECIFIC!!
145 # I could use POSIX::ARG_MAX, but that would be slow.
147 # Figure out length of static portion of command.
150 $static_length+=length($_)+1;
154 my $length=$static_length;
156 if (length($_) + 1 + $static_length > $command_max) {
157 error("This command is greater than the maximum command size allowed by the kernel, and cannot be split up further. What on earth are you doing? \"@_ $_\"");
159 $length+=length($_) + 1;
160 if ($length < $command_max) {
164 doit(@_,@collect) if $#collect > -1;
166 $length=$static_length + length($_) + 1;
169 doit(@_,@collect) if $#collect > -1;
172 # Print something if the verbose flag is on.
177 print "\t$message\n";
181 # Output an error message and exit.
193 print STDERR basename($0).": $message\n";
196 # Returns the basename of the argument passed to it.
200 $fn=~s:^.*/(.*?)$:$1:;
204 # Returns the directory name of the argument passed to it.
208 $fn=~s:^(.*)/.*?$:$1:;
212 # Pass in a number, will return true iff the current compatibility level
213 # is less than or equal to that number.
218 if (defined $ENV{DH_COMPAT}) {
221 elsif (-e 'debian/compat') {
223 open (COMPAT_IN, "debian/compat") || die "debian/compat: $!";
228 if ($c > $max_compat) {
229 error("Sorry, but $max_compat is the highest compatibility level of debhelper currently supported.");
235 # Pass it a name of a binary package, it returns the name of the tmp dir to
236 # use, for that package.
243 elsif (compat(1) && $package eq $dh{MAINPACKAGE}) {
244 # This is for back-compatibility with the debian/tmp tradition.
248 return "debian/$package";
252 # Pass this the name of a binary package, and the name of the file wanted
253 # for the package, and it will return the actual existing filename to use.
255 # It tries several filenames:
256 # * debian/package.filename.buildarch
257 # * debian/package.filename
258 # * debian/file (if the package is the main package)
263 if (-f "debian/$package.$filename.".buildarch()) {
264 return "debian/$package.$filename.".buildarch();
266 elsif (-f "debian/$package.$filename") {
267 return "debian/$package.$filename";
269 elsif ($package eq $dh{MAINPACKAGE} && -f "debian/$filename") {
270 return "debian/$filename";
277 # Pass it a name of a binary package, it returns the name to prefix to files
278 # in debian for this package.
282 if (compat(1) and $package eq $dh{MAINPACKAGE}) {
288 # Returns 1 if the package is a native debian package, null otherwise.
289 # As a side effect, sets $dh{VERSION} to the version of this package.
291 # Caches return code so it only needs to run dpkg-parsechangelog once.
297 return $isnative_cache{$package} if defined $isnative_cache{$package};
299 # Make sure we look at the correct changelog.
300 my $isnative_changelog=pkgfile($package,"changelog");
301 if (! $isnative_changelog) {
302 $isnative_changelog="debian/changelog";
304 # Get the package version.
305 my $version=`dpkg-parsechangelog -l$isnative_changelog`;
306 ($dh{VERSION})=$version=~m/Version:\s*(.*)/m;
307 # Did the changelog parse fail?
308 if (! defined $dh{VERSION}) {
309 error("changelog parse failure");
312 # Is this a native Debian package?
313 if ($dh{VERSION}=~m/.*-/) {
314 return $isnative_cache{$package}=0;
317 return $isnative_cache{$package}=1;
322 # Automatically add a shell script snippet to a debian script.
323 # Only works if the script has #DEBHELPER# in it.
327 # 2: script to add to
328 # 3: filename of snippet
329 # 4: sed to run on the snippet. Ie, s/#PACKAGE#/$PACKAGE/
336 # This is the file we will append to.
337 my $outfile="debian/".pkgext($package)."$script.debhelper";
339 # Figure out what shell script snippet to use.
341 if (defined($ENV{DH_AUTOSCRIPTDIR}) &&
342 -e "$ENV{DH_AUTOSCRIPTDIR}/$filename") {
343 $infile="$ENV{DH_AUTOSCRIPTDIR}/$filename";
346 if (-e "/usr/share/debhelper/autoscripts/$filename") {
347 $infile="/usr/share/debhelper/autoscripts/$filename";
350 error("/usr/share/debhelper/autoscripts/$filename does not exist");
354 complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
355 complex_doit("sed \"$sed\" $infile >> $outfile");
356 complex_doit("echo '# End automatically added section' >> $outfile");
359 # Removes a whole substvar line.
364 my $ext=pkgext($package);
365 my $substvarfile="debian/${ext}substvars";
367 complex_doit("grep -v '^${substvar}=' $substvarfile > $substvarfile.new || true");
368 doit("mv", "$substvarfile.new","$substvarfile");
371 # Adds a dependency on some package to the specified
372 # substvar in a package's substvar's file.
376 my $deppackage=shift;
380 my $ext=pkgext($package);
381 my $substvarfile="debian/${ext}substvars";
383 $str.=" ($verinfo)" if length $verinfo;
385 # Figure out what the line will look like, based on what's there
386 # now, and what we're to add or remove.
388 if (-e $substvarfile) {
390 open(SUBSTVARS_IN, "$substvarfile") || die "read $substvarfile: $!";
391 while (<SUBSTVARS_IN>) {
393 if (/^\Q$substvar\E=(.*)/) {
394 %items = map { $_ => 1} split(", ", $1);
406 $line=join(", ", keys %items);
413 complex_doit("echo '${substvar}=$line' >> $substvarfile");
417 # Reads in the specified file, one word at a time, and returns an array of
418 # the result. If a value is passed in as the second parameter, then glob
419 # expansion is done in the directory specified by the parameter ("." is
420 # frequently a good choice).
426 open (DH_FARRAY_IN, $file) || error("cannot read $file: $1");
427 while (<DH_FARRAY_IN>) {
428 # Only do glob expansion in v3 mode.
430 # The tricky bit is that the glob expansion is done
431 # as if we were in the specified directory, so the
432 # filenames that come out are relative to it.
433 if (defined $globdir && ! compat(2)) {
434 for (map { glob "$globdir/$_" } split) {
448 # Returns the build architecture. (Memoized)
453 return $arch if defined $arch;
455 $arch=`dpkg --print-architecture` || error($!);
461 # Returns a list of packages in the control file.
462 # Must pass "arch" or "indep" or "same" to specify arch-dependant or
463 # -independant or same arch packages. If nothing is specified, returns all
468 $type="" if ! defined $type;
470 # Look up the build arch if we need to.
472 if ($type eq 'same') {
473 $buildarch=buildarch();
480 open (CONTROL, 'debian/control') ||
481 error("cannot read debian/control: $!\n");
485 if (/^Package:\s*(.*)/) {
487 # Detect duplicate package names in the same control file.
488 if (! $seen{$package}) {
492 error("debian/control has a duplicate entry for $package");
495 if (/^Architecture:\s*(.*)/) {
499 if (!$_ or eof) { # end of stanza.
501 (($type eq 'indep' && $arch eq 'all') ||
502 ($type eq 'arch' && $arch ne 'all') ||
503 ($type eq 'same' && ($arch eq 'any' || $arch =~ /\b$buildarch\b/)) ||
505 push @list, $package;