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cb097e7a DM |
1 | #!/usr/bin/env perl |
2 | ||
3 | # core-cpan-diff: Compare CPAN modules with their equivalent in core | |
4 | ||
5 | # Originally based on App::DualLivedDiff by Steffen Mueller. | |
6 | ||
7 | use strict; | |
8 | use warnings; | |
9 | ||
10 | use 5.010; | |
11 | ||
12 | use Getopt::Long; | |
13 | use File::Temp (); | |
14 | use File::Path (); | |
15 | use File::Spec; | |
16 | use Archive::Extract; | |
17 | use IO::Uncompress::Gunzip (); | |
18 | use File::Compare (); | |
19 | use ExtUtils::Manifest; | |
20 | ||
21 | BEGIN { die "Must be run from root of perl source tree\n" unless -d 'Porting' } | |
22 | use lib 'Porting'; | |
23 | use Maintainers (); | |
24 | ||
25 | # if running from blead, we may be doing -Ilib, which means when we | |
26 | # 'chdir /tmp/foo', Archive::Extract may not find Archive::Tar etc. | |
27 | # So preload the things we need, and tell it to check %INC first: | |
28 | ||
29 | use Archive::Tar; | |
30 | use IPC::Open3; | |
31 | use IO::Select; | |
32 | $Module::Load::Conditional::CHECK_INC_HASH = 1; | |
33 | # stop Archive::Extract whinging about lack of Archive::Zip | |
34 | $Archive::Extract::WARN = 0; | |
35 | ||
36 | ||
37 | # Files, which if they exist in CPAN but not in perl, will not generate | |
38 | # an 'Only in CPAN' listing | |
39 | # | |
40 | our %IGNORABLE = map { ($_ => 1) } | |
41 | qw(.cvsignore .dualLivedDiffConfig .gitignore | |
42 | ANNOUNCE Announce Artistic AUTHORS BENCHMARK BUGS Build.PL | |
43 | CHANGELOG ChangeLog CHANGES Changes COPYING Copying CREDITS | |
44 | GOALS HISTORY INSTALL INSTALL.SKIP LICENSE Makefile.PL | |
45 | MANIFEST MANIFEST.SKIP META.yml NEW NOTES ppport.h README | |
46 | SIGNATURE THANKS TODO Todo VERSION WHATSNEW); | |
47 | ||
48 | # where, under the cache dir, to untar stuff to | |
49 | ||
50 | use constant UNTAR_DIR => 'untarred'; | |
51 | ||
52 | use constant DIFF_CMD => 'diff'; | |
53 | use constant WGET_CMD => 'wget'; | |
54 | ||
55 | sub usage { | |
56 | print STDERR "\n@_\n\n" if @_; | |
57 | print STDERR <<HERE; | |
58 | Usage: $0 [opts] [ -d | -v | -x ] [ -a | module ... ] | |
59 | ||
60 | -a/--all Scan all dual-life modules. | |
61 | ||
62 | -c/--cachedir Where to save downloaded CPAN tarball files | |
63 | (defaults to /tmp/something/ with deletion after each run). | |
64 | ||
65 | -d/--diff Display file differences using diff(1), rather than just | |
66 | listing which files have changed. | |
67 | The diff(1) command is assumed to be in your PATH. | |
68 | ||
69 | --diffopts Options to pass to the diff command. Defaults to '-u'. | |
70 | ||
71 | -f|force Force download from CPAN of new 02packages.details.txt file | |
72 | (with --crosscheck only). | |
73 | ||
74 | -o/--output File name to write output to (defaults to STDOUT). | |
75 | ||
76 | -r/--reverse Reverses the diff (perl to CPAN). | |
77 | ||
78 | -v/--verbose List the fate of *all* files in the tarball, not just those | |
79 | that differ or are missing. | |
80 | ||
81 | -x|crosscheck List the distributions whose current CPAN version differs from | |
82 | that in blead (i.e. the DISTRIBUTION field in Maintainers.pl). | |
83 | ||
84 | By default (i.e. without the --crosscheck option), for each listed module | |
85 | (or with -a, all CPAN modules listed in Maintainers.pl), grab the tarball | |
86 | from CPAN associated with that module, and compare the files in it with | |
87 | those in the perl source tree. | |
88 | ||
89 | Must be run from the root of the perl source tree. | |
90 | Module names must match the keys of %Modules in Maintainers.pl. | |
91 | HERE | |
92 | exit(1); | |
93 | } | |
94 | ||
95 | ||
96 | sub run { | |
97 | my $scan_all; | |
98 | my $diff_opts; | |
99 | my $reverse = 0; | |
100 | my $cache_dir; | |
101 | my $use_diff; | |
102 | my $output_file; | |
103 | my $verbose; | |
104 | my $force; | |
105 | my $do_crosscheck; | |
106 | ||
107 | GetOptions( | |
108 | 'a|all' => \$scan_all, | |
109 | 'c|cachedir=s' => \$cache_dir, | |
110 | 'd|diff' => \$use_diff, | |
111 | 'diffopts:s' => \$diff_opts, | |
112 | 'f|force' => \$force, | |
113 | 'h|help' => \&usage, | |
114 | 'o|output=s' => \$output_file, | |
115 | 'r|reverse' => \$reverse, | |
116 | 'v|verbose' => \$verbose, | |
117 | 'x|crosscheck' => \$do_crosscheck, | |
118 | ) or usage; | |
119 | ||
120 | ||
121 | my @modules; | |
122 | ||
123 | usage("Cannot mix -a with module list") if $scan_all && @ARGV; | |
124 | ||
125 | if ($do_crosscheck) { | |
126 | usage("can't use -r, -d, --diffopts, -v with --crosscheck") | |
127 | if ($reverse || $use_diff || $diff_opts || $verbose); | |
128 | } | |
129 | else { | |
130 | $diff_opts = '-u' unless defined $diff_opts; | |
131 | usage("can't use -f without --crosscheck") if $force; | |
132 | } | |
133 | ||
134 | @modules = $scan_all | |
135 | ? grep $Maintainers::Modules{$_}{CPAN}, | |
136 | (sort {lc $a cmp lc $b } keys %Maintainers::Modules) | |
137 | : @ARGV; | |
138 | usage("No modules specified") unless @modules; | |
139 | ||
140 | ||
141 | my $outfh; | |
142 | if (defined $output_file) { | |
143 | open $outfh, '>', $output_file | |
8c814d1a | 144 | or die "ERROR: could not open file '$output_file' for writing: $!\n"; |
cb097e7a DM |
145 | } |
146 | else { | |
147 | open $outfh, ">&STDOUT" | |
8c814d1a | 148 | or die "ERROR: can't dup STDOUT: $!\n"; |
cb097e7a DM |
149 | } |
150 | ||
151 | if (defined $cache_dir) { | |
152 | die "ERROR: no such directory: '$cache_dir'\n" unless -d $cache_dir; | |
153 | } | |
154 | ||
155 | if ($do_crosscheck) { | |
156 | do_crosscheck($outfh, $cache_dir, $force, \@modules); | |
157 | } | |
158 | else { | |
f0ce33d7 | 159 | do_compare(\@modules, $outfh, $output_file, $cache_dir, $verbose, $use_diff, |
cb097e7a DM |
160 | $reverse, $diff_opts); |
161 | } | |
162 | } | |
163 | ||
164 | ||
165 | ||
166 | # compare a list of modules against their CPAN equivalents | |
167 | ||
168 | sub do_compare { | |
f0ce33d7 | 169 | my ($modules, $outfh, $output_file, $cache_dir, $verbose, |
cb097e7a DM |
170 | $use_diff, $reverse, $diff_opts) = @_; |
171 | ||
172 | ||
173 | # first, make sure we have a directory where they can all be untarred, | |
174 | # and if its a permanent directory, clear any previous content | |
175 | my $untar_dir; | |
176 | if ($cache_dir) { | |
177 | $untar_dir = File::Spec->catdir($cache_dir, UNTAR_DIR); | |
178 | if (-d $untar_dir) { | |
179 | File::Path::rmtree($untar_dir) | |
180 | or die "failed to remove $untar_dir\n"; | |
181 | } | |
182 | mkdir $untar_dir | |
183 | or die "mkdir $untar_dir: $!\n"; | |
184 | } | |
185 | else { | |
186 | $untar_dir = File::Temp::tempdir( CLEANUP => 1 ); | |
187 | } | |
188 | ||
189 | my %ignorable = map { ($_ => 1) } @Maintainers::IGNORABLE; | |
190 | ||
191 | my %seen_dist; | |
192 | for my $module (@$modules) { | |
f0ce33d7 | 193 | warn "Processing $module ...\n" if defined $output_file; |
cb097e7a DM |
194 | print $outfh "\n$module\n" unless $use_diff; |
195 | ||
196 | my $m = $Maintainers::Modules{$module} | |
197 | or die "ERROR: No such module in Maintainers.pl: '$module'\n"; | |
198 | ||
199 | unless ($m->{CPAN}) { | |
200 | print $outfh "WARNING: $module is not dual-life; skipping\n"; | |
201 | next; | |
202 | } | |
203 | ||
204 | my $dist = $m->{DISTRIBUTION}; | |
205 | die "ERROR: $module has no DISTRIBUTION entry\n" unless defined $dist; | |
206 | ||
207 | if ($seen_dist{$dist}) { | |
208 | warn "WARNING: duplicate entry for $dist in $module\n" | |
209 | } | |
210 | $seen_dist{$dist}++; | |
211 | ||
8c814d1a DM |
212 | my $cpan_dir; |
213 | eval { | |
214 | $cpan_dir = get_distribution($cache_dir, $untar_dir, $module, $dist) | |
215 | }; | |
216 | if ($@) { | |
217 | print $outfh " ", $@; | |
218 | print $outfh " (skipping)\n"; | |
219 | next; | |
220 | } | |
cb097e7a DM |
221 | |
222 | my @perl_files = Maintainers::get_module_files($module); | |
223 | ||
224 | my $manifest = File::Spec->catfile($cpan_dir, 'MANIFEST'); | |
225 | die "ERROR: no such file: $manifest\n" unless -f $manifest; | |
226 | ||
227 | my $cpan_files = ExtUtils::Manifest::maniread($manifest); | |
228 | my @cpan_files = sort keys %$cpan_files; | |
229 | ||
230 | my ($excluded, $map) = get_map($m, $module, \@perl_files); | |
231 | ||
232 | my %perl_unseen; | |
233 | @perl_unseen{@perl_files} = (); | |
234 | my %perl_files = %perl_unseen; | |
235 | ||
236 | foreach my $cpan_file (@cpan_files) { | |
237 | my $mapped_file = cpan_to_perl($excluded, $map, $cpan_file); | |
238 | unless (defined $mapped_file) { | |
239 | print $outfh " Excluded: $cpan_file\n" if $verbose; | |
240 | next; | |
241 | } | |
242 | ||
243 | if (exists $perl_files{$mapped_file}) { | |
244 | delete $perl_unseen{$mapped_file}; | |
245 | } | |
246 | else { | |
247 | # some CPAN files foo are stored in core as foo.packed, | |
248 | # which are then unpacked by 'make test_prep' | |
249 | my $packed_file = "$mapped_file.packed"; | |
250 | if (exists $perl_files{$packed_file} ) { | |
251 | if (! -f $mapped_file and -f $packed_file) { | |
252 | print $outfh <<EOF; | |
253 | WARNING: $mapped_file not found, but .packed variant exists. | |
254 | Perhaps you need to run 'make test_prep'? | |
255 | EOF | |
256 | next; | |
257 | } | |
258 | delete $perl_unseen{$packed_file}; | |
259 | } | |
260 | else { | |
261 | if ($ignorable{$cpan_file}) { | |
262 | print $outfh " Ignored: $cpan_file\n" if $verbose; | |
263 | next; | |
264 | } | |
265 | ||
266 | unless ($use_diff) { | |
267 | print $outfh " CPAN only: $cpan_file", | |
268 | ($cpan_file eq $mapped_file) ? "\n" | |
269 | : " (expected $mapped_file)\n"; | |
270 | } | |
271 | next; | |
272 | } | |
273 | } | |
274 | ||
275 | ||
276 | my $abs_cpan_file = File::Spec->catfile($cpan_dir, $cpan_file); | |
277 | ||
278 | # should never happen | |
279 | die "ERROR: can't find file $abs_cpan_file\n" unless -f $abs_cpan_file; | |
280 | ||
281 | # might happen if the FILES entry in Maintainers.pl is wrong | |
282 | unless (-f $mapped_file) { | |
283 | print $outfh "WARNING: perl file not found: $mapped_file\n"; | |
284 | next; | |
285 | } | |
286 | ||
287 | ||
288 | if (File::Compare::compare($abs_cpan_file, $mapped_file)) { | |
289 | if ($use_diff) { | |
290 | file_diff($outfh, $abs_cpan_file, $mapped_file, | |
291 | $reverse, $diff_opts); | |
292 | } | |
293 | else { | |
294 | if ($cpan_file eq $mapped_file) { | |
295 | print $outfh " Modified: $cpan_file\n"; | |
296 | } | |
297 | else { | |
298 | print $outfh " Modified: $cpan_file $mapped_file\n"; | |
299 | } | |
300 | } | |
301 | } | |
302 | elsif ($verbose) { | |
303 | if ($cpan_file eq $mapped_file) { | |
304 | print $outfh " Unchanged: $cpan_file\n"; | |
305 | } | |
306 | else { | |
307 | print $outfh " Unchanged: $cpan_file $mapped_file\n"; | |
308 | } | |
309 | } | |
310 | } | |
311 | for (sort keys %perl_unseen) { | |
312 | print $outfh " Perl only: $_\n" unless $use_diff; | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | # given FooBar-1.23_45.tar.gz, return FooBar | |
318 | ||
319 | sub distro_base { | |
320 | my $d = shift; | |
321 | $d =~ s/\.tar\.gz$//; | |
322 | $d =~ s/\.gip$//; | |
323 | $d =~ s/[\d\-_\.]+$//; | |
324 | return $d; | |
325 | } | |
326 | ||
327 | # process --crosscheck action: | |
328 | # ie list all distributions whose CPAN versions differ from that listed in | |
329 | # Maintainers.pl | |
330 | ||
331 | sub do_crosscheck { | |
332 | my ($outfh, $cache_dir, $force, $modules) = @_; | |
333 | ||
334 | my $file = '02packages.details.txt'; | |
335 | my $download_dir = $cache_dir || File::Temp::tempdir( CLEANUP => 1 ); | |
336 | my $path = File::Spec->catfile($download_dir, $file); | |
337 | my $gzfile = "$path.gz"; | |
338 | ||
339 | # grab 02packages.details.txt | |
340 | ||
341 | my $url = 'http://www.cpan.org/modules/02packages.details.txt.gz'; | |
342 | ||
343 | if (! -f $gzfile or $force) { | |
344 | unlink $gzfile; | |
345 | my_getstore($url, $gzfile); | |
346 | } | |
347 | unlink $path; | |
348 | IO::Uncompress::Gunzip::gunzip($gzfile, $path) | |
349 | or die "ERROR: failed to ungzip $gzfile: $IO::Uncompress::Gunzip::GunzipError\n"; | |
350 | ||
351 | # suck in the data from it | |
352 | ||
353 | open my $fh, '<', $path | |
354 | or die "ERROR: open: $file: $!\n"; | |
355 | ||
356 | my %distros; | |
357 | my %modules; | |
358 | ||
359 | while (<$fh>) { | |
360 | next if 1../^$/; | |
361 | chomp; | |
362 | my @f = split ' ', $_; | |
363 | if (@f != 3) { | |
364 | warn "WARNING: $file:$.: line doesn't have three fields (skipping)\n"; | |
365 | next; | |
366 | } | |
cb097e7a | 367 | my $distro = $f[2]; |
f0ce33d7 DM |
368 | $distro =~ s{^[A-Z]/[A-Z]{2}/}{}; # strip leading A/AB/ |
369 | $modules{$f[0]} = $distro; | |
370 | ||
371 | (my $short_distro = $distro) =~ s{^.*/}{}; | |
cb097e7a | 372 | |
f0ce33d7 | 373 | $distros{distro_base($short_distro)}{$distro} = 1; |
cb097e7a DM |
374 | } |
375 | ||
376 | for my $module (@$modules) { | |
377 | my $m = $Maintainers::Modules{$module} | |
378 | or die "ERROR: No such module in Maintainers.pl: '$module'\n"; | |
379 | ||
380 | unless ($m->{CPAN}) { | |
381 | print $outfh "\nWARNING: $module is not dual-life; skipping\n"; | |
382 | next; | |
383 | } | |
384 | ||
f0ce33d7 | 385 | # given an entry like |
cb097e7a DM |
386 | # Foo::Bar 1.23 foo-bar-1.23.tar.gz, |
387 | # first compare the module name against Foo::Bar, and failing that, | |
388 | # against foo-bar | |
389 | ||
390 | my $pdist = $m->{DISTRIBUTION}; | |
391 | die "ERROR: $module has no DISTRIBUTION entry\n" unless defined $pdist; | |
cb097e7a DM |
392 | |
393 | my $cdist = $modules{$module}; | |
f0ce33d7 | 394 | (my $short_pdist = $pdist) =~ s{^.*/}{}; |
cb097e7a | 395 | |
f0ce33d7 DM |
396 | unless (defined $cdist) { |
397 | my $d = $distros{distro_base($short_pdist)}; | |
cb097e7a DM |
398 | unless (defined $d) { |
399 | print $outfh "\n$module: Can't determine current CPAN entry\n"; | |
400 | next; | |
401 | } | |
402 | if (keys %$d > 1) { | |
403 | print $outfh "\n$module: (found more than one CPAN candidate):\n"; | |
404 | print $outfh " perl: $pdist\n"; | |
405 | print $outfh " CPAN: $_\n" for sort keys %$d; | |
406 | next; | |
407 | } | |
408 | $cdist = (keys %$d)[0]; | |
409 | } | |
410 | ||
411 | if ($cdist ne $pdist) { | |
412 | print $outfh "\n$module:\n Perl: $pdist\n CPAN: $cdist\n"; | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | ||
418 | ||
419 | # get the EXCLUDED and MAP entries for this module, or | |
420 | # make up defauts if they don't exist | |
421 | ||
422 | sub get_map { | |
423 | my ($m, $module_name, $perl_files) = @_; | |
424 | ||
425 | my ($excluded, $map) = @$m{qw(EXCLUDED MAP)}; | |
426 | ||
427 | $excluded ||= []; | |
428 | ||
429 | return $excluded, $map if $map; | |
430 | ||
431 | # all files under ext/foo-bar (plus maybe some under t/lib)??? | |
432 | ||
433 | my $ext; | |
434 | for (@$perl_files) { | |
435 | if (m{^(ext/[^/]+/)}) { | |
436 | if (defined $ext and $ext ne $1) { | |
437 | # more than one ext/$ext/ | |
438 | undef $ext; | |
439 | last; | |
440 | } | |
441 | $ext = $1; | |
442 | } | |
443 | elsif (m{^t/lib/}) { | |
444 | next; | |
445 | } | |
446 | else { | |
447 | undef $ext; | |
448 | last; | |
449 | } | |
450 | } | |
451 | ||
452 | if (defined $ext) { | |
453 | $map = { '' => $ext }, | |
454 | } | |
455 | else { | |
456 | (my $base = $module_name) =~ s{::}{/}g; | |
457 | $base ="lib/$base"; | |
458 | $map = { | |
459 | 'lib/' => 'lib/', | |
460 | '' => "$base/", | |
461 | }; | |
462 | } | |
463 | return $excluded, $map; | |
464 | } | |
465 | ||
466 | ||
467 | # Given an exclude list and a mapping hash, convert a CPAN filename | |
468 | # (eg 't/bar.t') to the equivalent perl filename (eg 'lib/Foo/Bar/t/bar.t'). | |
469 | # Returns an empty list for an excluded file | |
470 | ||
471 | sub cpan_to_perl { | |
472 | my ($excluded, $map, $cpan_file) = @_; | |
473 | ||
474 | for my $exclude (@$excluded) { | |
475 | # may be a simple string to match exactly, or a pattern | |
476 | if (ref $exclude) { | |
477 | return if $cpan_file =~ $exclude; | |
478 | } | |
479 | else { | |
480 | return if $cpan_file eq $exclude; | |
481 | } | |
482 | } | |
483 | ||
484 | my $perl_file = $cpan_file; | |
485 | ||
486 | # try longest prefix first, then alphabetically on tie-break | |
487 | for my $prefix (sort { length($b) <=> length($a) || $a cmp $b } keys %$map) | |
488 | { | |
489 | last if $perl_file =~ s/^\Q$prefix/$map->{$prefix}/; | |
490 | } | |
491 | return $perl_file; | |
492 | } | |
493 | ||
494 | ||
495 | ||
496 | # do LWP::Simple::getstore, possibly without LWP::Simple being available | |
497 | ||
498 | my $lwp_simple_available; | |
499 | ||
500 | sub my_getstore { | |
501 | my ($url, $file) = @_; | |
502 | unless (defined $lwp_simple_available) { | |
503 | eval { require LWP::Simple }; | |
504 | $lwp_simple_available = $@ eq ''; | |
505 | } | |
506 | if ($lwp_simple_available) { | |
507 | return LWP::Simple::is_success(LWP::Simple::getstore($url, $file)); | |
508 | } | |
509 | else { | |
510 | return system(WGET_CMD, "-O", $file, $url) == 0; | |
511 | } | |
512 | } | |
513 | ||
514 | ||
515 | # download and unpack a distribution | |
516 | # Returns the full pathname of the extracted directory | |
517 | # (eg '/tmp/XYZ/Foo_bar-1.23') | |
518 | ||
519 | # cache_dir: where to dowenload the .tar.gz file to | |
520 | # untar_dir: where to untar or unzup the file | |
521 | # module: name of module | |
522 | # dist: name of the distribution | |
523 | ||
524 | sub get_distribution { | |
525 | my ($cache_dir, $untar_dir, $module, $dist) = @_; | |
526 | ||
527 | $dist =~ m{.+/([^/]+)$} | |
8c814d1a | 528 | or die "ERROR: $module: invalid DISTRIBUTION name (no AUTHOR/ prefix): $dist\n"; |
cb097e7a DM |
529 | my $filename = $1; |
530 | ||
531 | my $download_dir = $cache_dir || File::Temp::tempdir( CLEANUP => 1 ); | |
532 | my $download_file = File::Spec->catfile($download_dir, $filename); | |
533 | ||
534 | # download distribution | |
535 | ||
536 | if (-f $download_file and ! -s $download_file ) { | |
537 | # wget can leave a zero-length file on failed download | |
538 | unlink $download_file; | |
539 | } | |
540 | ||
541 | unless (-f $download_file) { | |
542 | # not cached | |
543 | $dist =~ /^([A-Z])([A-Z])/ | |
8c814d1a | 544 | or die "ERROR: $module: invalid DISTRIBUTION name (not /^[A-Z]{2}/): $dist\n"; |
cb097e7a DM |
545 | |
546 | my $url = "http://www.cpan.org/modules/by-authors/id/$1/$1$2/$dist"; | |
547 | my_getstore($url, $download_file) | |
8c814d1a | 548 | or die "ERROR: Could not fetch '$url'\n"; |
cb097e7a DM |
549 | } |
550 | ||
551 | # extract distribution | |
552 | ||
553 | my $ae = Archive::Extract->new( archive => $download_file); | |
554 | $ae->extract( to => $untar_dir ) | |
8c814d1a | 555 | or die "ERROR: failed to extract distribution '$download_file to temp. dir: " . $ae->error() . "\n"; |
cb097e7a DM |
556 | |
557 | # get the name of the extracted distribution dir | |
558 | ||
559 | my $path = File::Spec->catfile($untar_dir, $filename); | |
560 | ||
561 | $path =~ s/\.tar\.gz$// or | |
562 | $path =~ s/\.zip$// or | |
563 | die "ERROR: downloaded file does not have a recognised suffix: $path\n"; | |
564 | ||
565 | die "ERROR: Extracted tarball does not appear as $path\n" unless -d $path; | |
566 | ||
567 | return $path; | |
568 | } | |
569 | ||
570 | ||
571 | # produce the diff of a single file | |
572 | sub file_diff { | |
573 | my $outfh = shift; | |
574 | my $cpan_file = shift; | |
575 | my $perl_file = shift; | |
576 | my $reverse = shift; | |
577 | my $diff_opts = shift; | |
578 | ||
579 | ||
580 | my @cmd = (DIFF_CMD, split ' ', $diff_opts); | |
581 | if ($reverse) { | |
582 | push @cmd, $perl_file, $cpan_file; | |
583 | } | |
584 | else { | |
585 | push @cmd, $cpan_file, $perl_file; | |
586 | } | |
587 | my $result = `@cmd`; | |
588 | ||
589 | $result =~ s{^(--- |\+\+\+ )/tmp/[^/]+/}{$1}gm; | |
590 | ||
591 | print $outfh $result; | |
592 | } | |
593 | ||
594 | ||
595 | run(); | |
596 |