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a0d0e21e |
1 | package AutoSplit; |
2 | |
3 | require 5.000; |
4 | require Exporter; |
5 | |
6 | use Config; |
7 | use Carp; |
8 | |
9 | @ISA = qw(Exporter); |
10 | @EXPORT = qw(&autosplit &autosplit_lib_modules); |
11 | @EXPORT_OK = qw($Verbose $Keep); |
12 | |
13 | # for portability warn about names longer than $maxlen |
14 | $Maxlen = 8; # 8 for dos, 11 (14-".al") for SYSVR3 |
15 | $Verbose = 1; # 0=none, 1=minimal, 2=list .al files |
16 | $Keep = 0; |
17 | $IndexFile = "autosplit.ix"; # file also serves as timestamp |
18 | |
19 | $maxflen = 255; |
20 | $maxflen = 14 if $Config{'d_flexfnam'} ne 'define'; |
21 | $vms = ($Config{'osname'} eq 'VMS'); |
22 | |
23 | sub autosplit{ |
24 | my($file, $autodir) = @_; |
25 | autosplit_file($file, $autodir, $Keep, 1, 0); |
26 | } |
27 | |
28 | |
29 | |
30 | # This function is used during perl building/installation |
31 | # ./miniperl -e 'use AutoSplit; autosplit_modules(@ARGV)' ... |
32 | |
33 | sub autosplit_lib_modules{ |
34 | my(@modules) = @_; # list of Module names |
35 | |
36 | foreach(@modules){ |
37 | s#::#/#g; # incase specified as ABC::XYZ |
38 | s#^lib/##; # incase specified as lib/*.pm |
39 | if ($vms && /[:>\]]/) { # may need to convert VMS-style filespecs |
40 | my ($dir,$name) = (/(.*])(.*)/); |
41 | $dir =~ s/.*lib[\.\]]//; |
42 | $dir =~ s#[\.\]]#/#g; |
43 | $_ = $dir . $name; |
44 | } |
45 | autosplit_file("lib/$_", "lib/auto", $Keep, 1, 1); |
46 | } |
47 | 0; |
48 | } |
49 | |
50 | |
51 | # private functions |
52 | |
53 | sub autosplit_file{ |
54 | my($filename, $autodir, $keep, $check_for_autoloader, $check_mod_time) = @_; |
55 | my(@names); |
56 | |
57 | # where to write output files |
58 | $autodir = "lib/auto" unless $autodir; |
59 | die "autosplit directory $autodir does not exist" unless -d $autodir; |
60 | |
61 | # allow just a package name to be used |
62 | $filename .= ".pm" unless ($filename =~ m/\.pm$/); |
63 | |
64 | open(IN, "<$filename") || die "AutoSplit: Can't open $filename: $!\n"; |
65 | my($pm_mod_time) = (stat($filename))[9]; |
66 | my($autoloader_seen) = 0; |
67 | while (<IN>) { |
68 | # record last package name seen |
69 | $package = $1 if (m/^\s*package\s+([\w:]+)\s*;/); |
70 | ++$autoloader_seen if m/^\s*use\s+AutoLoader\b/; |
71 | ++$autoloader_seen if m/\bISA\s*=.*\bAutoLoader\b/; |
72 | last if /^__END__/; |
73 | } |
74 | return 0 if ($check_for_autoloader && !$autoloader_seen); |
75 | $_ or die "Can't find __END__ in $filename\n"; |
76 | |
77 | $package or die "Can't find 'package Name;' in $filename\n"; |
78 | |
79 | my($modpname) = $package; $modpname =~ s#::#/#g; |
80 | my($al_idx_file) = "$autodir/$modpname/$IndexFile"; |
81 | |
82 | die "Package $package does not match filename $filename" |
83 | unless ($filename =~ m/$modpname.pm$/ or |
84 | $vms && $filename =~ m/$modpname.pm/i); |
85 | |
86 | if ($check_mod_time){ |
87 | my($al_ts_time) = (stat("$al_idx_file"))[9] || 1; |
88 | if ($al_ts_time >= $pm_mod_time){ |
89 | print "AutoSplit skipped ($al_idx_file newer that $filename)\n" |
90 | if ($Verbose >= 2); |
91 | return undef; # one undef, not a list |
92 | } |
93 | } |
94 | |
95 | my($from) = ($Verbose>=2) ? "$filename => " : ""; |
96 | print "AutoSplitting $package ($from$autodir/$modpname)\n" |
97 | if $Verbose; |
98 | |
99 | unless (-d "$autodir/$modpname"){ |
100 | local($", @p)="/"; |
101 | foreach(split(/\//,"$autodir/$modpname")){ |
102 | push(@p, $_); |
42793c05 |
103 | next if -d "@p/"; |
a0d0e21e |
104 | mkdir("@p",0777) or die "AutoSplit unable to mkdir @p: $!"; |
105 | } |
106 | } |
107 | |
108 | # We must try to deal with some SVR3 systems with a limit of 14 |
109 | # characters for file names. Sadly we *cannot* simply truncate all |
110 | # file names to 14 characters on these systems because we *must* |
111 | # create filenames which exactly match the names used by AutoLoader.pm. |
112 | # This is a problem because some systems silently truncate the file |
113 | # names while others treat long file names as an error. |
114 | |
115 | # We do not yet deal with multiple packages within one file. |
116 | # Ideally both of these styles should work. |
117 | # |
118 | # package NAME; |
119 | # __END__ |
120 | # sub AAA { ... } |
121 | # package NAME::option1; |
122 | # sub BBB { ... } |
123 | # package NAME::option2; |
124 | # sub BBB { ... } |
125 | # |
126 | # package NAME; |
127 | # __END__ |
128 | # sub AAA { ... } |
129 | # sub NAME::option1::BBB { ... } |
130 | # sub NAME::option2::BBB { ... } |
131 | # |
132 | # For now both of these produce warnings. |
133 | |
134 | open(OUT,">/dev/null") || open(OUT,">nla0:"); # avoid 'not opened' warning |
135 | my(@subnames); |
136 | while (<IN>) { |
137 | if (/^package ([\w:]+)\s*;/) { |
138 | warn "package $1; in AutoSplit section ignored. Not currently supported."; |
139 | } |
140 | if (/^sub ([\w:]+)/) { |
141 | print OUT "1;\n"; |
142 | my($subname) = $1; |
143 | if ($subname =~ m/::/){ |
144 | warn "subs with package names not currently supported in AutoSplit section"; |
145 | } |
146 | push(@subnames, $subname); |
147 | my($lname, $sname) = ($subname, substr($subname,0,$maxflen-3)); |
148 | my($lpath) = "$autodir/$modpname/$lname.al"; |
149 | my($spath) = "$autodir/$modpname/$sname.al"; |
150 | unless(open(OUT, ">$lpath")){ |
151 | open(OUT, ">$spath") or die "Can't create $spath: $!\n"; |
152 | push(@names, $sname); |
153 | print " writing $spath (with truncated name)\n" |
154 | if ($Verbose>=1); |
155 | }else{ |
156 | push(@names, $lname); |
157 | print " writing $lpath\n" if ($Verbose>=2); |
158 | } |
159 | print OUT "# NOTE: Derived from $filename. ", |
160 | "Changes made here will be lost.\n"; |
161 | print OUT "package $package;\n\n"; |
162 | } |
163 | print OUT $_; |
164 | } |
165 | print OUT "1;\n"; |
166 | close(OUT); |
167 | close(IN); |
168 | |
169 | if (!$keep){ # don't keep any obsolete *.al files in the directory |
170 | my(%names); |
171 | @names{@names} = @names; |
172 | opendir(OUTDIR,"$autodir/$modpname"); |
173 | foreach(sort readdir(OUTDIR)){ |
174 | next unless /\.al$/; |
175 | my($subname) = m/(.*)\.al$/; |
176 | next if $names{substr($subname,0,$maxflen-3)}; |
177 | my($file) = "$autodir/$modpname/$_"; |
178 | print " deleting $file\n" if ($Verbose>=2); |
179 | unlink $file or carp "Unable to delete $file: $!"; |
180 | } |
181 | closedir(OUTDIR); |
182 | } |
183 | |
184 | open(TS,">$al_idx_file") or |
185 | carp "AutoSplit: unable to create timestamp file ($al_idx_file): $!"; |
186 | print TS "# Index created by AutoSplit for $filename (file acts as timestamp)\n"; |
187 | print TS map("sub $_ ;\n", @subnames); |
188 | close(TS); |
189 | |
190 | check_unique($package, $Maxlen, 1, @names); |
191 | |
192 | @names; |
193 | } |
194 | |
195 | |
196 | sub check_unique{ |
197 | my($module, $maxlen, $warn, @names) = @_; |
198 | my(%notuniq) = (); |
199 | my(%shorts) = (); |
200 | my(@toolong) = grep(length > $maxlen, @names); |
201 | |
202 | foreach(@toolong){ |
203 | my($trunc) = substr($_,0,$maxlen); |
204 | $notuniq{$trunc}=1 if $shorts{$trunc}; |
205 | $shorts{$trunc} = ($shorts{$trunc}) ? "$shorts{$trunc}, $_" : $_; |
206 | } |
207 | if (%notuniq && $warn){ |
208 | print "$module: some names are not unique when truncated to $maxlen characters:\n"; |
209 | foreach(keys %notuniq){ |
210 | print " $shorts{$_} truncate to $_\n"; |
211 | } |
212 | } |
213 | %notuniq; |
214 | } |
215 | |
216 | 1; |
217 | __END__ |
218 | |
219 | # test functions so AutoSplit.pm can be applied to itself: |
220 | sub test1{ "test 1\n"; } |
221 | sub test2{ "test 2\n"; } |
222 | sub test3{ "test 3\n"; } |
223 | sub test4{ "test 4\n"; } |
224 | |
225 | |