5 use Config qw(%Config);
8 use File::Path qw(mkpath);
9 use File::Spec::Functions qw(curdir catfile);
11 our($VERSION, @ISA, @EXPORT, @EXPORT_OK, $Verbose, $Keep, $Maxlen,
12 $CheckForAutoloader, $CheckModTime);
16 @EXPORT = qw(&autosplit &autosplit_lib_modules);
17 @EXPORT_OK = qw($Verbose $Keep $Maxlen $CheckForAutoloader $CheckModTime);
21 AutoSplit - split a package for autoloading
25 autosplit($file, $dir, $keep, $check, $modtime);
27 autosplit_lib_modules(@modules);
31 This function will split up your program into files that the AutoLoader
32 module can handle. It is used by both the standard perl libraries and by
33 the MakeMaker utility, to automatically configure libraries for autoloading.
35 The C<autosplit> interface splits the specified file into a hierarchy
36 rooted at the directory C<$dir>. It creates directories as needed to reflect
37 class hierarchy, and creates the file F<autosplit.ix>. This file acts as
38 both forward declaration of all package routines, and as timestamp for the
39 last update of the hierarchy.
41 The remaining three arguments to C<autosplit> govern other options to
48 If the third argument, I<$keep>, is false, then any
49 pre-existing C<*.al> files in the autoload directory are removed if
50 they are no longer part of the module (obsoleted functions).
56 fourth argument, I<$check>, instructs C<autosplit> to check the module
57 currently being split to ensure that it does include a C<use>
58 specification for the AutoLoader module, and skips the module if
59 AutoLoader is not detected.
64 Lastly, the I<$modtime> argument specifies
65 that C<autosplit> is to check the modification time of the module
66 against that of the C<autosplit.ix> file, and only split the module if
68 $modtime defaults to 1.
72 Typical use of AutoSplit in the perl MakeMaker utility is via the command-line
75 perl -e 'use AutoSplit; autosplit($ARGV[0], $ARGV[1], 0, 1, 1)'
77 Defined as a Make macro, it is invoked with file and directory arguments;
78 C<autosplit> will split the specified file into the specified directory and
79 delete obsolete C<.al> files, after checking first that the module does use
80 the AutoLoader, and ensuring that the module is not already currently split
81 in its current form (the modtime test).
83 The C<autosplit_lib_modules> form is used in the building of perl. It takes
84 as input a list of files (modules) that are assumed to reside in a directory
85 B<lib> relative to the current directory. Each file is sent to the
86 autosplitter one at a time, to be split into the directory B<lib/auto>.
88 In both usages of the autosplitter, only subroutines defined following the
89 perl I<__END__> token are split out into separate files. Some
90 routines may be placed prior to this marker to force their immediate loading
93 =head2 Multiple packages
95 As of version 1.01 of the AutoSplit module it is possible to have
96 multiple packages within a single file. Both of the following cases
102 package NAME::option1;
104 package NAME::option2;
110 sub NAME::option1::BBB { ... }
111 sub NAME::option2::BBB { ... }
115 C<AutoSplit> will inform the user if it is necessary to create the
116 top-level directory specified in the invocation. It is preferred that
117 the script or installation process that invokes C<AutoSplit> have
118 created the full directory path ahead of time. This warning may
119 indicate that the module is being split into an incorrect path.
121 C<AutoSplit> will warn the user of all subroutines whose name causes
122 potential file naming conflicts on machines with drastically limited
123 (8 characters or less) file name length. Since the subroutine name is
124 used as the file name, these warnings can aid in portability to such
127 Warnings are issued and the file skipped if C<AutoSplit> cannot locate
128 either the I<__END__> marker or a "package Name;"-style specification.
130 C<AutoSplit> will also emit general diagnostics for inability to
131 create directories or files.
135 # for portability warn about names longer than $maxlen
136 $Maxlen = 8; # 8 for dos, 11 (14-".al") for SYSVR3
137 $Verbose = 1; # 0=none, 1=minimal, 2=list .al files
139 $CheckForAutoloader = 1;
142 my $IndexFile = "autosplit.ix"; # file also serves as timestamp
144 $maxflen = 14 if $Config{'d_flexfnam'} ne 'define';
145 if (defined (&Dos::UseLFN)) {
146 $maxflen = Dos::UseLFN() ? 255 : 11;
148 my $Is_VMS = ($^O eq 'VMS');
150 # allow checking for valid ': attrlist' attachments
152 $nested = qr{ \( (?: (?> [^()]+ ) | (??{ $nested }) )* \) }x;
153 my $one_attr = qr{ (?> (?! \d) \w+ (?:$nested)? ) (?:\s*\:\s*|\s+(?!\:)) }x;
154 my $attr_list = qr{ \s* : \s* (?: $one_attr )* }x;
159 my($file, $autodir, $keep, $ckal, $ckmt) = @_;
160 # $file - the perl source file to be split (after __END__)
161 # $autodir - the ".../auto" dir below which to write split subs
162 # Handle optional flags:
163 $keep = $Keep unless defined $keep;
164 $ckal = $CheckForAutoloader unless defined $ckal;
165 $ckmt = $CheckModTime unless defined $ckmt;
166 autosplit_file($file, $autodir, $keep, $ckal, $ckmt);
170 # This function is used during perl building/installation
171 # ./miniperl -e 'use AutoSplit; autosplit_lib_modules(@ARGV)' ...
173 sub autosplit_lib_modules{
174 my(@modules) = @_; # list of Module names
176 while(defined($_ = shift @modules)){
177 while (m#(.*?[^:])::([^:].*)#) { # in case specified as ABC::XYZ
178 $_ = catfile($1, $2);
180 s|\\|/|g; # bug in ksh OS/2
181 my($lib) = catfile(curdir(), "lib");
182 s#^$lib\W+##s; # incase specified as lib/*.pm
183 if ($Is_VMS && /[:>\]]/) { # may need to convert VMS-style filespecs
184 my ($dir,$name) = (/(.*])(.*)/s);
185 $dir =~ s/.*lib[\.\]]//s;
186 $dir =~ s#[\.\]]#/#g;
189 autosplit_file(catfile($lib, $_), catfile($lib, "auto"),
190 $Keep, $CheckForAutoloader, $CheckModTime);
199 my($filename, $autodir, $keep, $check_for_autoloader, $check_mod_time)
205 # where to write output files
206 $autodir ||= catfile(curdir(), "lib", "auto");
208 ($autodir = VMS::Filespec::unixpath($autodir)) =~ s|/\z||;
209 $filename = VMS::Filespec::unixify($filename); # may have dirs
211 unless (-d $autodir){
212 mkpath($autodir,0,0755);
213 # We should never need to create the auto dir
214 # here. installperl (or similar) should have done
215 # it. Expecting it to exist is a valuable sanity check against
216 # autosplitting into some random directory by mistake.
217 print "Warning: AutoSplit had to create top-level " .
218 "$autodir unexpectedly.\n";
221 # allow just a package name to be used
222 $filename .= ".pm" unless ($filename =~ m/\.pm\z/);
224 open(IN, "<$filename") or die "AutoSplit: Can't open $filename: $!\n";
225 my($pm_mod_time) = (stat($filename))[9];
226 my($autoloader_seen) = 0;
228 my($def_package,$last_package,$this_package,$fnr);
232 $in_pod = 1 if /^=\w/;
233 $in_pod = 0 if /^=cut/;
234 next if ($in_pod || /^=cut/);
236 # record last package name seen
237 $def_package = $1 if (m/^\s*package\s+([\w:]+)\s*;/);
238 ++$autoloader_seen if m/^\s*(use|require)\s+AutoLoader\b/;
239 ++$autoloader_seen if m/\bISA\s*=.*\bAutoLoader\b/;
242 if ($check_for_autoloader && !$autoloader_seen){
243 print "AutoSplit skipped $filename: no AutoLoader used\n"
247 $_ or die "Can't find __END__ in $filename\n";
249 $def_package or die "Can't find 'package Name;' in $filename\n";
251 my($modpname) = _modpname($def_package);
253 # this _has_ to match so we have a reasonable timestamp file
254 die "Package $def_package ($modpname.pm) does not ".
255 "match filename $filename"
256 unless ($filename =~ m/\Q$modpname.pm\E$/ or
257 ($^O eq 'dos') or ($^O eq 'MSWin32') or
258 $Is_VMS && $filename =~ m/$modpname.pm/i);
260 my($al_idx_file) = "$autodir/$modpname/$IndexFile";
262 if ($check_mod_time){
263 my($al_ts_time) = (stat("$al_idx_file"))[9] || 1;
264 if ($al_ts_time >= $pm_mod_time){
265 print "AutoSplit skipped ($al_idx_file newer than $filename)\n"
267 return undef; # one undef, not a list
271 my($modnamedir) = catfile($autodir, $modpname);
272 print "AutoSplitting $filename ($modnamedir)\n"
275 unless (-d "$modnamedir"){
276 mkpath("$modnamedir",0,0777);
279 # We must try to deal with some SVR3 systems with a limit of 14
280 # characters for file names. Sadly we *cannot* simply truncate all
281 # file names to 14 characters on these systems because we *must*
282 # create filenames which exactly match the names used by AutoLoader.pm.
283 # This is a problem because some systems silently truncate the file
284 # names while others treat long file names as an error.
286 my $Is83 = $maxflen==11; # plain, case INSENSITIVE dos filenames
288 my(@subnames, $subname, %proto, %package);
294 $in_pod = 1 if /^=\w/;
295 $in_pod = 0 if /^=cut/;
296 next if ($in_pod || /^=cut/);
297 # the following (tempting) old coding gives big troubles if a
298 # cut is forgotten at EOF:
299 # next if /^=\w/ .. /^=cut/;
300 if (/^package\s+([\w:]+)\s*;/) {
301 $this_package = $def_package = $1;
303 if (/^sub\s+([\w:]+)(\s*(?:\(.*?\))?(?:$attr_list)?)/) {
304 print OUT "# end of $last_package\::$subname\n1;\n"
307 my $proto = $2 || '';
308 if ($subname =~ s/(.*):://){
311 $this_package = $def_package;
313 my $fq_subname = "$this_package\::$subname";
314 $package{$fq_subname} = $this_package;
315 $proto{$fq_subname} = $proto;
316 push(@subnames, $fq_subname);
317 my($lname, $sname) = ($subname, substr($subname,0,$maxflen-3));
318 $modpname = _modpname($this_package);
319 my($modnamedir) = catfile($autodir, $modpname);
320 mkpath("$modnamedir",0,0777);
321 my($lpath) = catfile($modnamedir, "$lname.al");
322 my($spath) = catfile($modnamedir, "$sname.al");
324 if (!$Is83 and open(OUT, ">$lpath")){
326 print " writing $lpath\n" if ($Verbose>=2);
328 open(OUT, ">$spath") or die "Can't create $spath: $!\n";
330 print " writing $spath (with truncated name)\n"
333 push(@outfiles, $path);
335 # NOTE: Derived from $filename.
336 # Changes made here will be lost when autosplit again.
338 package $this_package;
340 #line $fnr "$filename (autosplit into $path)"
347 push(@cache, $_) if @cache || /\S/;
359 $last_package = $this_package if defined $this_package;
362 print OUT @cache,"1;\n# end of $last_package\::$subname\n";
367 if (!$keep){ # don't keep any obsolete *.al files in the directory
369 # @outfiles{@outfiles} = @outfiles;
370 # perl downcases all filenames on VMS (which upcases all filenames) so
371 # we'd better downcase the sub name list too, or subs with upper case
372 # letters in them will get their .al files deleted right after they're
373 # created. (The mixed case sub name won't match the all-lowercase
374 # filename, and so be cleaned up as a scrap file)
375 if ($Is_VMS or $Is83) {
376 %outfiles = map {lc($_) => lc($_) } @outfiles;
378 @outfiles{@outfiles} = @outfiles;
380 my(%outdirs,@outdirs);
382 $outdirs{File::Basename::dirname($_)}||=1;
384 for my $dir (keys %outdirs) {
385 opendir(OUTDIR,$dir);
386 foreach (sort readdir(OUTDIR)){
387 next unless /\.al\z/;
388 my($file) = catfile($dir, $_);
389 $file = lc $file if $Is83 or $Is_VMS;
390 next if $outfiles{$file};
391 print " deleting $file\n" if ($Verbose>=2);
392 my($deleted,$thistime); # catch all versions on VMS
393 do { $deleted += ($thistime = unlink $file) } while ($thistime);
394 carp "Unable to delete $file: $!" unless $deleted;
400 open(TS,">$al_idx_file") or
401 carp "AutoSplit: unable to create timestamp file ($al_idx_file): $!";
402 print TS "# Index created by AutoSplit for $filename\n";
403 print TS "# (file acts as timestamp)\n";
405 for my $fqs (@subnames) {
407 $subname =~ s/.*:://;
408 print TS "package $package{$fqs};\n"
409 unless $last_package eq $package{$fqs};
410 print TS "sub $subname $proto{$fqs};\n";
411 $last_package = $package{$fqs};
416 _check_unique($filename, $Maxlen, 1, @outfiles);
423 my $modpname = $package;
424 if ($^O eq 'MSWin32') {
425 $modpname =~ s#::#\\#g;
427 while ($modpname =~ m#(.*?[^:])::([^:].*)#) {
428 $modpname = catfile($1, $2);
435 my($filename, $maxlen, $warn, @outfiles) = @_;
439 length(File::Basename::basename($_))
445 my($dir) = File::Basename::dirname($_);
446 my($file) = File::Basename::basename($_);
447 my($trunc) = substr($file,0,$maxlen);
448 $notuniq{$dir}{$trunc} = 1 if $shorts{$dir}{$trunc};
449 $shorts{$dir}{$trunc} = $shorts{$dir}{$trunc} ?
450 "$shorts{$dir}{$trunc}, $file" : $file;
452 if (%notuniq && $warn){
453 print "$filename: some names are not unique when " .
454 "truncated to $maxlen characters:\n";
455 foreach my $dir (sort keys %notuniq){
456 print " directory $dir:\n";
457 foreach my $trunc (sort keys %{$notuniq{$dir}}) {
458 print " $shorts{$dir}{$trunc} truncate to $trunc\n";
467 # test functions so AutoSplit.pm can be applied to itself:
468 sub test1 ($) { "test 1\n"; }
469 sub test2 ($$) { "test 2\n"; }
470 sub test3 ($$$) { "test 3\n"; }
471 sub testtesttesttest4_1 { "test 4\n"; }
472 sub testtesttesttest4_2 { "duplicate test 4\n"; }
473 sub Just::Another::test5 { "another test 5\n"; }
474 sub test6 { return join ":", __FILE__,__LINE__; }
475 package Yet::Another::AutoSplit;
476 sub testtesttesttest4_1 ($) { "another test 4\n"; }
477 sub testtesttesttest4_2 ($$) { "another duplicate test 4\n"; }
478 package Yet::More::Attributes;
479 sub test_a1 ($) : locked :locked { 1; }
480 sub test_a2 : locked { 1; }