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 &filedoublearray
15 &GetPackages &basename &dirname &xargs %dh &compat &addsubstvar
16 &delsubstvar &excludefile);
21 # If DH_OPTIONS is set, prepend it @ARGV.
22 if (defined($ENV{DH_OPTIONS})) {
23 # Ignore leading/trailing whitespace.
24 $ENV{DH_OPTIONS}=~s/^\s+//;
25 $ENV{DH_OPTIONS}=~s/\s+$//;
26 unshift @ARGV,split(/\s+/,$ENV{DH_OPTIONS});
29 # Check to see if an argument on the command line starts with a dash.
30 # if so, we need to pass this off to the resource intensive
31 # Getopt::Long, which I'd prefer to avoid loading at all if possible.
34 foreach $arg (@ARGV) {
41 eval "use Debian::Debhelper::Dh_Getopt";
43 %dh=Debian::Debhelper::Dh_Getopt::parseopts();
46 # Another way to set excludes.
47 if (exists $ENV{DH_ALWAYS_EXCLUDE} && length $ENV{DH_ALWAYS_EXCLUDE}) {
48 push @{$dh{EXCLUDE}}, $ENV{DH_ALWAYS_EXCLUDE};
51 # Generate EXCLUDE_FIND.
54 foreach (@{$dh{EXCLUDE}}) {
58 $dh{EXCLUDE_FIND}.="-regex .\\*$x.\\* -or ";
60 $dh{EXCLUDE_FIND}=~s/ -or $//;
63 # Check to see if DH_VERBOSE environment variable was set, if so,
64 # make sure verbose is on.
65 if (defined $ENV{DH_VERBOSE} && $ENV{DH_VERBOSE} ne "") {
69 # Check to see if DH_NO_ACT environment variable was set, if so,
70 # make sure no act mode is on.
71 if (defined $ENV{DH_NO_ACT} && $ENV{DH_NO_ACT} ne "") {
75 my @allpackages=GetPackages();
76 # Get the name of the main binary package (first one listed in
77 # debian/control). Only if the main package was not set on the
79 if (! exists $dh{MAINPACKAGE} || ! defined $dh{MAINPACKAGE}) {
80 $dh{MAINPACKAGE}=$allpackages[0];
83 # Check if packages to build have been specified, if not, fall back to
84 # the default, doing them all.
85 if (! defined $dh{DOPACKAGES} || ! @{$dh{DOPACKAGES}}) {
86 if ($dh{DOINDEP} || $dh{DOARCH} || $dh{DOSAME}) {
87 error("You asked that all arch in(dep) packages be built, but there are none of that type.");
89 push @{$dh{DOPACKAGES}},@allpackages;
92 # Check to see if -P was specified. If so, we can only act on a single
94 if ($dh{TMPDIR} && $#{$dh{DOPACKAGES}} > 0) {
95 error("-P was specified, but multiple packages would be acted on (".join(",",@{$dh{DOPACKAGES}}).").");
98 # Figure out which package is the first one we were instructed to build.
99 # This package gets special treatement: files and directories specified on
100 # the command line may affect it.
101 $dh{FIRSTPACKAGE}=${$dh{DOPACKAGES}}[0];
104 # Pass it an array containing the arguments of a shell command like would
105 # be run by exec(). It turns that into a line like you might enter at the
106 # shell, escaping metacharacters and quoting arguments that contain spaces.
111 foreach my $word (@args) {
113 # Escape only a few things since it will be quoted.
114 # Note we use double quotes because you cannot
115 # escape ' in single quotes, while " can be escaped
117 # This does make -V"foo bar" turn into "-Vfoo bar",
118 # but that will be parsed identically by the shell
120 $word=~s/([\n`\$"\\])/\$1/g;
121 push @ret, "\"$word\"";
124 # This list is from _Unix in a Nutshell_. (except '#')
125 $word=~s/([\s!"\$()*+#;<>?@\[\]\\`|~])/\\$1/g;
129 return join(' ', @ret);
132 # Run a command, and display the command to stdout if verbose mode is on.
133 # All commands that modifiy files in $TMP should be ran via this
136 # Note that this cannot handle complex commands, especially anything
137 # involving redirection. Use complex_doit instead.
139 verbose_print(escape_shell(@_));
142 system(@_) == 0 || error("command returned error code");
146 # Run a command and display the command to stdout if verbose mode is on.
147 # Use doit() if you can, instead of this function, because this function
148 # forks a shell. However, this function can handle more complicated stuff
151 verbose_print(join(" ",@_));
154 # The join makes system get a scalar so it forks off a shell.
155 system(join(" ",@_)) == 0
156 || error("command returned error code");
160 # Run a command that may have a huge number of arguments, like xargs does.
161 # Pass in a reference to an array containing the arguments, and then other
162 # parameters that are the command and any parameters that should be passed to
167 # The kernel can accept command lines up to 20k worth of characters.
168 my $command_max=20000; # LINUX SPECIFIC!!
169 # I could use POSIX::ARG_MAX, but that would be slow.
171 # Figure out length of static portion of command.
174 $static_length+=length($_)+1;
178 my $length=$static_length;
180 if (length($_) + 1 + $static_length > $command_max) {
181 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? \"@_ $_\"");
183 $length+=length($_) + 1;
184 if ($length < $command_max) {
188 doit(@_,@collect) if $#collect > -1;
190 $length=$static_length + length($_) + 1;
193 doit(@_,@collect) if $#collect > -1;
196 # Print something if the verbose flag is on.
201 print "\t$message\n";
205 # Output an error message and exit.
217 print STDERR basename($0).": $message\n";
220 # Returns the basename of the argument passed to it.
224 $fn=~s/\/$//g; # ignore trailing slashes
225 $fn=~s:^.*/(.*?)$:$1:;
229 # Returns the directory name of the argument passed to it.
233 $fn=~s/\/$//g; # ignore trailing slashes
234 $fn=~s:^(.*)/.*?$:$1:;
238 # Pass in a number, will return true iff the current compatibility level
239 # is less than or equal to that number.
244 if (defined $ENV{DH_COMPAT}) {
247 elsif (-e 'debian/compat') {
249 open (COMPAT_IN, "debian/compat") || die "debian/compat: $!";
254 if ($c > $max_compat) {
255 error("Sorry, but $max_compat is the highest compatibility level of debhelper currently supported.");
261 # Pass it a name of a binary package, it returns the name of the tmp dir to
262 # use, for that package.
269 elsif (compat(1) && $package eq $dh{MAINPACKAGE}) {
270 # This is for back-compatibility with the debian/tmp tradition.
274 return "debian/$package";
278 # Pass this the name of a binary package, and the name of the file wanted
279 # for the package, and it will return the actual existing filename to use.
281 # It tries several filenames:
282 # * debian/package.filename.buildarch
283 # * debian/package.filename
284 # * debian/file (if the package is the main package)
289 if (-f "debian/$package.$filename.".buildarch()) {
290 return "debian/$package.$filename.".buildarch();
292 elsif (-f "debian/$package.$filename") {
293 return "debian/$package.$filename";
295 elsif ($package eq $dh{MAINPACKAGE} && -f "debian/$filename") {
296 return "debian/$filename";
303 # Pass it a name of a binary package, it returns the name to prefix to files
304 # in debian for this package.
308 if (compat(1) and $package eq $dh{MAINPACKAGE}) {
314 # Returns 1 if the package is a native debian package, null otherwise.
315 # As a side effect, sets $dh{VERSION} to the version of this package.
317 # Caches return code so it only needs to run dpkg-parsechangelog once.
323 return $isnative_cache{$package} if defined $isnative_cache{$package};
325 # Make sure we look at the correct changelog.
326 my $isnative_changelog=pkgfile($package,"changelog");
327 if (! $isnative_changelog) {
328 $isnative_changelog="debian/changelog";
330 # Get the package version.
331 my $version=`dpkg-parsechangelog -l$isnative_changelog`;
332 ($dh{VERSION})=$version=~m/Version:\s*(.*)/m;
333 # Did the changelog parse fail?
334 if (! defined $dh{VERSION}) {
335 error("changelog parse failure");
338 # Is this a native Debian package?
339 if ($dh{VERSION}=~m/.*-/) {
340 return $isnative_cache{$package}=0;
343 return $isnative_cache{$package}=1;
348 # Automatically add a shell script snippet to a debian script.
349 # Only works if the script has #DEBHELPER# in it.
353 # 2: script to add to
354 # 3: filename of snippet
355 # 4: sed to run on the snippet. Ie, s/#PACKAGE#/$PACKAGE/
362 # This is the file we will append to.
363 my $outfile="debian/".pkgext($package)."$script.debhelper";
365 # Figure out what shell script snippet to use.
367 if (defined($ENV{DH_AUTOSCRIPTDIR}) &&
368 -e "$ENV{DH_AUTOSCRIPTDIR}/$filename") {
369 $infile="$ENV{DH_AUTOSCRIPTDIR}/$filename";
372 if (-e "/usr/share/debhelper/autoscripts/$filename") {
373 $infile="/usr/share/debhelper/autoscripts/$filename";
376 error("/usr/share/debhelper/autoscripts/$filename does not exist");
380 complex_doit("echo \"# Automatically added by ".basename($0)."\">> $outfile");
381 complex_doit("sed \"$sed\" $infile >> $outfile");
382 complex_doit("echo '# End automatically added section' >> $outfile");
385 # Removes a whole substvar line.
390 my $ext=pkgext($package);
391 my $substvarfile="debian/${ext}substvars";
393 if (-e $substvarfile) {
394 complex_doit("grep -v '^${substvar}=' $substvarfile > $substvarfile.new || true");
395 doit("mv", "$substvarfile.new","$substvarfile");
399 # Adds a dependency on some package to the specified
400 # substvar in a package's substvar's file.
404 my $deppackage=shift;
408 my $ext=pkgext($package);
409 my $substvarfile="debian/${ext}substvars";
411 $str.=" ($verinfo)" if defined $verinfo && length $verinfo;
413 # Figure out what the line will look like, based on what's there
414 # now, and what we're to add or remove.
416 if (-e $substvarfile) {
418 open(SUBSTVARS_IN, "$substvarfile") || die "read $substvarfile: $!";
419 while (<SUBSTVARS_IN>) {
421 if (/^\Q$substvar\E=(.*)/) {
422 %items = map { $_ => 1} split(", ", $1);
434 $line=join(", ", keys %items);
441 complex_doit("echo '${substvar}=$line' >> $substvarfile");
445 # Reads in the specified file, one line at a time. splits on words,
446 # and returns an array of arrays of the contents.
447 # If a value is passed in as the second parameter, then glob
448 # expansion is done in the directory specified by the parameter ("." is
449 # frequently a good choice).
450 sub filedoublearray {
455 open (DH_FARRAY_IN, $file) || error("cannot read $file: $1");
456 while (<DH_FARRAY_IN>) {
458 # Only do glob expansion in v3 mode.
460 # The tricky bit is that the glob expansion is done
461 # as if we were in the specified directory, so the
462 # filenames that come out are relative to it.
463 if (defined $globdir && ! compat(2)) {
464 for (map { glob "$globdir/$_" } split) {
479 # Reads in the specified file, one word at a time, and returns an array of
480 # the result. Can do globbing as does filedoublearray.
482 return map { @$_ } filedoublearray(@_);
485 # Passed a filename, returns true if -X says that file should be excluded.
487 my $filename = shift;
488 foreach my $f (@{$dh{EXCLUDE}}) {
489 return 1 if $filename =~ /\Q$f\E/;
494 # Returns the build architecture. (Memoized)
499 return $arch if defined $arch;
501 $arch=`dpkg --print-architecture` || error($!);
507 # Returns a list of packages in the control file.
508 # Must pass "arch" or "indep" or "same" to specify arch-dependant or
509 # -independant or same arch packages. If nothing is specified, returns all
514 $type="" if ! defined $type;
516 # Look up the build arch if we need to.
518 if ($type eq 'same') {
519 $buildarch=buildarch();
526 open (CONTROL, 'debian/control') ||
527 error("cannot read debian/control: $!\n");
531 if (/^Package:\s*(.*)/) {
533 # Detect duplicate package names in the same control file.
534 if (! $seen{$package}) {
538 error("debian/control has a duplicate entry for $package");
541 if (/^Architecture:\s*(.*)/) {
545 if (!$_ or eof) { # end of stanza.
547 (($type eq 'indep' && $arch eq 'all') ||
548 ($type eq 'arch' && $arch ne 'all') ||
549 ($type eq 'same' && ($arch eq 'any' || $arch =~ /\b$buildarch\b/)) ||
551 push @list, $package;