| 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 | -u/--upstream only print modules with the given upstream (defaults to all) |
| 79 | |
| 80 | -v/--verbose List the fate of *all* files in the tarball, not just those |
| 81 | that differ or are missing. |
| 82 | |
| 83 | -x|crosscheck List the distributions whose current CPAN version differs from |
| 84 | that in blead (i.e. the DISTRIBUTION field in Maintainers.pl). |
| 85 | |
| 86 | By default (i.e. without the --crosscheck option), for each listed module |
| 87 | (or with -a, all CPAN modules listed in Maintainers.pl), grab the tarball |
| 88 | from CPAN associated with that module, and compare the files in it with |
| 89 | those in the perl source tree. |
| 90 | |
| 91 | Must be run from the root of the perl source tree. |
| 92 | Module names must match the keys of %Modules in Maintainers.pl. |
| 93 | HERE |
| 94 | exit(1); |
| 95 | } |
| 96 | |
| 97 | |
| 98 | sub run { |
| 99 | my $scan_all; |
| 100 | my $diff_opts; |
| 101 | my $reverse = 0; |
| 102 | my @wanted_upstreams; |
| 103 | my $cache_dir; |
| 104 | my $use_diff; |
| 105 | my $output_file; |
| 106 | my $verbose; |
| 107 | my $force; |
| 108 | my $do_crosscheck; |
| 109 | |
| 110 | GetOptions( |
| 111 | 'a|all' => \$scan_all, |
| 112 | 'c|cachedir=s' => \$cache_dir, |
| 113 | 'd|diff' => \$use_diff, |
| 114 | 'diffopts:s' => \$diff_opts, |
| 115 | 'f|force' => \$force, |
| 116 | 'h|help' => \&usage, |
| 117 | 'o|output=s' => \$output_file, |
| 118 | 'r|reverse' => \$reverse, |
| 119 | 'u|upstream=s@'=> \@wanted_upstreams, |
| 120 | 'v|verbose' => \$verbose, |
| 121 | 'x|crosscheck' => \$do_crosscheck, |
| 122 | ) or usage; |
| 123 | |
| 124 | |
| 125 | my @modules; |
| 126 | |
| 127 | usage("Cannot mix -a with module list") if $scan_all && @ARGV; |
| 128 | |
| 129 | if ($do_crosscheck) { |
| 130 | usage("can't use -r, -d, --diffopts, -v with --crosscheck") |
| 131 | if ($reverse || $use_diff || $diff_opts || $verbose); |
| 132 | } |
| 133 | else { |
| 134 | $diff_opts = '-u' unless defined $diff_opts; |
| 135 | usage("can't use -f without --crosscheck") if $force; |
| 136 | } |
| 137 | |
| 138 | @modules = $scan_all |
| 139 | ? grep $Maintainers::Modules{$_}{CPAN}, |
| 140 | (sort {lc $a cmp lc $b } keys %Maintainers::Modules) |
| 141 | : @ARGV; |
| 142 | usage("No modules specified") unless @modules; |
| 143 | |
| 144 | |
| 145 | my $outfh; |
| 146 | if (defined $output_file) { |
| 147 | open $outfh, '>', $output_file |
| 148 | or die "ERROR: could not open file '$output_file' for writing: $!\n"; |
| 149 | } |
| 150 | else { |
| 151 | open $outfh, ">&STDOUT" |
| 152 | or die "ERROR: can't dup STDOUT: $!\n"; |
| 153 | } |
| 154 | |
| 155 | if (defined $cache_dir) { |
| 156 | die "ERROR: no such directory: '$cache_dir'\n" unless -d $cache_dir; |
| 157 | } |
| 158 | |
| 159 | if ($do_crosscheck) { |
| 160 | do_crosscheck($outfh, $cache_dir, $force, \@modules); |
| 161 | } |
| 162 | else { |
| 163 | do_compare(\@modules, $outfh, $output_file, $cache_dir, $verbose, $use_diff, |
| 164 | $reverse, $diff_opts, \@wanted_upstreams); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | |
| 169 | |
| 170 | # compare a list of modules against their CPAN equivalents |
| 171 | |
| 172 | sub do_compare { |
| 173 | my ($modules, $outfh, $output_file, $cache_dir, $verbose, |
| 174 | $use_diff, $reverse, $diff_opts, $wanted_upstreams) = @_; |
| 175 | |
| 176 | |
| 177 | # first, make sure we have a directory where they can all be untarred, |
| 178 | # and if its a permanent directory, clear any previous content |
| 179 | my $untar_dir; |
| 180 | if ($cache_dir) { |
| 181 | $untar_dir = File::Spec->catdir($cache_dir, UNTAR_DIR); |
| 182 | if (-d $untar_dir) { |
| 183 | File::Path::rmtree($untar_dir) |
| 184 | or die "failed to remove $untar_dir\n"; |
| 185 | } |
| 186 | mkdir $untar_dir |
| 187 | or die "mkdir $untar_dir: $!\n"; |
| 188 | } |
| 189 | else { |
| 190 | $untar_dir = File::Temp::tempdir( CLEANUP => 1 ); |
| 191 | } |
| 192 | |
| 193 | my %ignorable = map { ($_ => 1) } @Maintainers::IGNORABLE; |
| 194 | |
| 195 | my %seen_dist; |
| 196 | for my $module (@$modules) { |
| 197 | warn "Processing $module ...\n" if defined $output_file; |
| 198 | |
| 199 | my $m = $Maintainers::Modules{$module} |
| 200 | or die "ERROR: No such module in Maintainers.pl: '$module'\n"; |
| 201 | |
| 202 | unless ($m->{CPAN}) { |
| 203 | print $outfh "WARNING: $module is not dual-life; skipping\n"; |
| 204 | next; |
| 205 | } |
| 206 | |
| 207 | my $dist = $m->{DISTRIBUTION}; |
| 208 | die "ERROR: $module has no DISTRIBUTION entry\n" unless defined $dist; |
| 209 | |
| 210 | if ($seen_dist{$dist}) { |
| 211 | warn "WARNING: duplicate entry for $dist in $module\n" |
| 212 | } |
| 213 | |
| 214 | my $upstream = $m->{UPSTREAM} || 'UNKNOWN'; |
| 215 | next if @$wanted_upstreams and ! ($upstream ~~ $wanted_upstreams); |
| 216 | print $outfh "\n$module - ".$Maintainers::Modules{$module}->{DISTRIBUTION}."\n" unless $use_diff; |
| 217 | print $outfh " upstream is: ".($m->{UPSTREAM} || 'UNKNOWN!')."\n"; |
| 218 | |
| 219 | $seen_dist{$dist}++; |
| 220 | |
| 221 | my $cpan_dir; |
| 222 | eval { |
| 223 | $cpan_dir = get_distribution($cache_dir, $untar_dir, $module, $dist) |
| 224 | }; |
| 225 | if ($@) { |
| 226 | print $outfh " ", $@; |
| 227 | print $outfh " (skipping)\n"; |
| 228 | next; |
| 229 | } |
| 230 | |
| 231 | my @perl_files = Maintainers::get_module_files($module); |
| 232 | |
| 233 | my $manifest = File::Spec->catfile($cpan_dir, 'MANIFEST'); |
| 234 | die "ERROR: no such file: $manifest\n" unless -f $manifest; |
| 235 | |
| 236 | my $cpan_files = ExtUtils::Manifest::maniread($manifest); |
| 237 | my @cpan_files = sort keys %$cpan_files; |
| 238 | |
| 239 | my ($excluded, $map) = get_map($m, $module, \@perl_files); |
| 240 | |
| 241 | my %perl_unseen; |
| 242 | @perl_unseen{@perl_files} = (); |
| 243 | my %perl_files = %perl_unseen; |
| 244 | |
| 245 | foreach my $cpan_file (@cpan_files) { |
| 246 | my $mapped_file = cpan_to_perl($excluded, $map, $cpan_file); |
| 247 | unless (defined $mapped_file) { |
| 248 | print $outfh " Excluded: $cpan_file\n" if $verbose; |
| 249 | next; |
| 250 | } |
| 251 | |
| 252 | if (exists $perl_files{$mapped_file}) { |
| 253 | delete $perl_unseen{$mapped_file}; |
| 254 | } |
| 255 | else { |
| 256 | # some CPAN files foo are stored in core as foo.packed, |
| 257 | # which are then unpacked by 'make test_prep' |
| 258 | my $packed_file = "$mapped_file.packed"; |
| 259 | if (exists $perl_files{$packed_file} ) { |
| 260 | if (! -f $mapped_file and -f $packed_file) { |
| 261 | print $outfh <<EOF; |
| 262 | WARNING: $mapped_file not found, but .packed variant exists. |
| 263 | Perhaps you need to run 'make test_prep'? |
| 264 | EOF |
| 265 | next; |
| 266 | } |
| 267 | delete $perl_unseen{$packed_file}; |
| 268 | } |
| 269 | else { |
| 270 | if ($ignorable{$cpan_file}) { |
| 271 | print $outfh " Ignored: $cpan_file\n" if $verbose; |
| 272 | next; |
| 273 | } |
| 274 | |
| 275 | unless ($use_diff) { |
| 276 | print $outfh " CPAN only: $cpan_file", |
| 277 | ($cpan_file eq $mapped_file) ? "\n" |
| 278 | : " (expected $mapped_file)\n"; |
| 279 | } |
| 280 | next; |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | |
| 285 | my $abs_cpan_file = File::Spec->catfile($cpan_dir, $cpan_file); |
| 286 | |
| 287 | # should never happen |
| 288 | die "ERROR: can't find file $abs_cpan_file\n" unless -f $abs_cpan_file; |
| 289 | |
| 290 | # might happen if the FILES entry in Maintainers.pl is wrong |
| 291 | unless (-f $mapped_file) { |
| 292 | print $outfh "WARNING: perl file not found: $mapped_file\n"; |
| 293 | next; |
| 294 | } |
| 295 | |
| 296 | my $relative_mapped_file = $mapped_file; |
| 297 | $relative_mapped_file =~ s/^(cpan|dist|ext)\/.*?\///; |
| 298 | |
| 299 | if (File::Compare::compare($abs_cpan_file, $mapped_file)) { |
| 300 | |
| 301 | |
| 302 | if ($use_diff) { |
| 303 | file_diff($outfh, $abs_cpan_file, $mapped_file, |
| 304 | $reverse, $diff_opts); |
| 305 | } |
| 306 | else { |
| 307 | if ($cpan_file eq $relative_mapped_file) { |
| 308 | print $outfh " Modified: $relative_mapped_file\n"; |
| 309 | } |
| 310 | else { |
| 311 | print $outfh " Modified: $cpan_file $relative_mapped_file\n"; |
| 312 | } |
| 313 | } |
| 314 | } |
| 315 | elsif ($verbose) { |
| 316 | if ($cpan_file eq $relative_mapped_file) { |
| 317 | print $outfh " Unchanged: $cpan_file\n"; |
| 318 | } |
| 319 | else { |
| 320 | print $outfh " Unchanged: $cpan_file $relative_mapped_file\n"; |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | for (sort keys %perl_unseen) { |
| 325 | print $outfh " Perl only: $_\n" unless $use_diff; |
| 326 | } |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | # given FooBar-1.23_45.tar.gz, return FooBar |
| 331 | |
| 332 | sub distro_base { |
| 333 | my $d = shift; |
| 334 | $d =~ s/\.tar\.gz$//; |
| 335 | $d =~ s/\.gip$//; |
| 336 | $d =~ s/[\d\-_\.]+$//; |
| 337 | return $d; |
| 338 | } |
| 339 | |
| 340 | # process --crosscheck action: |
| 341 | # ie list all distributions whose CPAN versions differ from that listed in |
| 342 | # Maintainers.pl |
| 343 | |
| 344 | sub do_crosscheck { |
| 345 | my ($outfh, $cache_dir, $force, $modules) = @_; |
| 346 | |
| 347 | my $file = '02packages.details.txt'; |
| 348 | my $download_dir = $cache_dir || File::Temp::tempdir( CLEANUP => 1 ); |
| 349 | my $path = File::Spec->catfile($download_dir, $file); |
| 350 | my $gzfile = "$path.gz"; |
| 351 | |
| 352 | # grab 02packages.details.txt |
| 353 | |
| 354 | my $url = 'http://www.cpan.org/modules/02packages.details.txt.gz'; |
| 355 | |
| 356 | if (! -f $gzfile or $force) { |
| 357 | unlink $gzfile; |
| 358 | my_getstore($url, $gzfile); |
| 359 | } |
| 360 | unlink $path; |
| 361 | IO::Uncompress::Gunzip::gunzip($gzfile, $path) |
| 362 | or die "ERROR: failed to ungzip $gzfile: $IO::Uncompress::Gunzip::GunzipError\n"; |
| 363 | |
| 364 | # suck in the data from it |
| 365 | |
| 366 | open my $fh, '<', $path |
| 367 | or die "ERROR: open: $file: $!\n"; |
| 368 | |
| 369 | my %distros; |
| 370 | my %modules; |
| 371 | |
| 372 | while (<$fh>) { |
| 373 | next if 1../^$/; |
| 374 | chomp; |
| 375 | my @f = split ' ', $_; |
| 376 | if (@f != 3) { |
| 377 | warn "WARNING: $file:$.: line doesn't have three fields (skipping)\n"; |
| 378 | next; |
| 379 | } |
| 380 | my $distro = $f[2]; |
| 381 | $distro =~ s{^[A-Z]/[A-Z]{2}/}{}; # strip leading A/AB/ |
| 382 | $modules{$f[0]} = $distro; |
| 383 | |
| 384 | (my $short_distro = $distro) =~ s{^.*/}{}; |
| 385 | |
| 386 | $distros{distro_base($short_distro)}{$distro} = 1; |
| 387 | } |
| 388 | |
| 389 | for my $module (@$modules) { |
| 390 | my $m = $Maintainers::Modules{$module} |
| 391 | or die "ERROR: No such module in Maintainers.pl: '$module'\n"; |
| 392 | |
| 393 | unless ($m->{CPAN}) { |
| 394 | print $outfh "\nWARNING: $module is not dual-life; skipping\n"; |
| 395 | next; |
| 396 | } |
| 397 | |
| 398 | # given an entry like |
| 399 | # Foo::Bar 1.23 foo-bar-1.23.tar.gz, |
| 400 | # first compare the module name against Foo::Bar, and failing that, |
| 401 | # against foo-bar |
| 402 | |
| 403 | my $pdist = $m->{DISTRIBUTION}; |
| 404 | die "ERROR: $module has no DISTRIBUTION entry\n" unless defined $pdist; |
| 405 | |
| 406 | my $cdist = $modules{$module}; |
| 407 | (my $short_pdist = $pdist) =~ s{^.*/}{}; |
| 408 | |
| 409 | unless (defined $cdist) { |
| 410 | my $d = $distros{distro_base($short_pdist)}; |
| 411 | unless (defined $d) { |
| 412 | print $outfh "\n$module: Can't determine current CPAN entry\n"; |
| 413 | next; |
| 414 | } |
| 415 | if (keys %$d > 1) { |
| 416 | print $outfh "\n$module: (found more than one CPAN candidate):\n"; |
| 417 | print $outfh " perl: $pdist\n"; |
| 418 | print $outfh " CPAN: $_\n" for sort keys %$d; |
| 419 | next; |
| 420 | } |
| 421 | $cdist = (keys %$d)[0]; |
| 422 | } |
| 423 | |
| 424 | if ($cdist ne $pdist) { |
| 425 | print $outfh "\n$module:\n Perl: $pdist\n CPAN: $cdist\n"; |
| 426 | } |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | |
| 431 | |
| 432 | # get the EXCLUDED and MAP entries for this module, or |
| 433 | # make up defauts if they don't exist |
| 434 | |
| 435 | sub get_map { |
| 436 | my ($m, $module_name, $perl_files) = @_; |
| 437 | |
| 438 | my ($excluded, $map) = @$m{qw(EXCLUDED MAP)}; |
| 439 | |
| 440 | $excluded ||= []; |
| 441 | |
| 442 | return $excluded, $map if $map; |
| 443 | |
| 444 | # all files under ext/foo-bar (plus maybe some under t/lib)??? |
| 445 | |
| 446 | my $ext; |
| 447 | for (@$perl_files) { |
| 448 | if (m{^((?:ext|dist|cpan)/[^/]+/)}) { |
| 449 | if (defined $ext and $ext ne $1) { |
| 450 | # more than one ext/$ext/ |
| 451 | undef $ext; |
| 452 | last; |
| 453 | } |
| 454 | $ext = $1; |
| 455 | } |
| 456 | elsif (m{^t/lib/}) { |
| 457 | next; |
| 458 | } |
| 459 | else { |
| 460 | undef $ext; |
| 461 | last; |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | if (defined $ext) { |
| 466 | $map = { '' => $ext }, |
| 467 | } |
| 468 | else { |
| 469 | (my $base = $module_name) =~ s{::}{/}g; |
| 470 | $base ="lib/$base"; |
| 471 | $map = { |
| 472 | 'lib/' => 'lib/', |
| 473 | '' => "$base/", |
| 474 | }; |
| 475 | } |
| 476 | return $excluded, $map; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | # Given an exclude list and a mapping hash, convert a CPAN filename |
| 481 | # (eg 't/bar.t') to the equivalent perl filename (eg 'lib/Foo/Bar/t/bar.t'). |
| 482 | # Returns an empty list for an excluded file |
| 483 | |
| 484 | sub cpan_to_perl { |
| 485 | my ($excluded, $map, $cpan_file) = @_; |
| 486 | |
| 487 | for my $exclude (@$excluded) { |
| 488 | # may be a simple string to match exactly, or a pattern |
| 489 | if (ref $exclude) { |
| 490 | return if $cpan_file =~ $exclude; |
| 491 | } |
| 492 | else { |
| 493 | return if $cpan_file eq $exclude; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | my $perl_file = $cpan_file; |
| 498 | |
| 499 | # try longest prefix first, then alphabetically on tie-break |
| 500 | for my $prefix (sort { length($b) <=> length($a) || $a cmp $b } keys %$map) |
| 501 | { |
| 502 | last if $perl_file =~ s/^\Q$prefix/$map->{$prefix}/; |
| 503 | } |
| 504 | return $perl_file; |
| 505 | } |
| 506 | |
| 507 | |
| 508 | |
| 509 | # do LWP::Simple::getstore, possibly without LWP::Simple being available |
| 510 | |
| 511 | my $lwp_simple_available; |
| 512 | |
| 513 | sub my_getstore { |
| 514 | my ($url, $file) = @_; |
| 515 | unless (defined $lwp_simple_available) { |
| 516 | eval { require LWP::Simple }; |
| 517 | $lwp_simple_available = $@ eq ''; |
| 518 | } |
| 519 | if ($lwp_simple_available) { |
| 520 | return LWP::Simple::is_success(LWP::Simple::getstore($url, $file)); |
| 521 | } |
| 522 | else { |
| 523 | return system(WGET_CMD, "-O", $file, $url) == 0; |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | |
| 528 | # download and unpack a distribution |
| 529 | # Returns the full pathname of the extracted directory |
| 530 | # (eg '/tmp/XYZ/Foo_bar-1.23') |
| 531 | |
| 532 | # cache_dir: where to dowenload the .tar.gz file to |
| 533 | # untar_dir: where to untar or unzup the file |
| 534 | # module: name of module |
| 535 | # dist: name of the distribution |
| 536 | |
| 537 | sub get_distribution { |
| 538 | my ($cache_dir, $untar_dir, $module, $dist) = @_; |
| 539 | |
| 540 | $dist =~ m{.+/([^/]+)$} |
| 541 | or die "ERROR: $module: invalid DISTRIBUTION name (no AUTHOR/ prefix): $dist\n"; |
| 542 | my $filename = $1; |
| 543 | |
| 544 | my $download_dir = $cache_dir || File::Temp::tempdir( CLEANUP => 1 ); |
| 545 | my $download_file = File::Spec->catfile($download_dir, $filename); |
| 546 | |
| 547 | # download distribution |
| 548 | |
| 549 | if (-f $download_file and ! -s $download_file ) { |
| 550 | # wget can leave a zero-length file on failed download |
| 551 | unlink $download_file; |
| 552 | } |
| 553 | |
| 554 | unless (-f $download_file) { |
| 555 | # not cached |
| 556 | $dist =~ /^([A-Z])([A-Z])/ |
| 557 | or die "ERROR: $module: invalid DISTRIBUTION name (not /^[A-Z]{2}/): $dist\n"; |
| 558 | |
| 559 | my $url = "http://www.cpan.org/modules/by-authors/id/$1/$1$2/$dist"; |
| 560 | my_getstore($url, $download_file) |
| 561 | or die "ERROR: Could not fetch '$url'\n"; |
| 562 | } |
| 563 | |
| 564 | # extract distribution |
| 565 | |
| 566 | my $ae = Archive::Extract->new( archive => $download_file); |
| 567 | $ae->extract( to => $untar_dir ) |
| 568 | or die "ERROR: failed to extract distribution '$download_file to temp. dir: " . $ae->error() . "\n"; |
| 569 | |
| 570 | # get the name of the extracted distribution dir |
| 571 | |
| 572 | my $path = File::Spec->catfile($untar_dir, $filename); |
| 573 | |
| 574 | $path =~ s/\.tar\.gz$// or |
| 575 | $path =~ s/\.zip$// or |
| 576 | die "ERROR: downloaded file does not have a recognised suffix: $path\n"; |
| 577 | |
| 578 | die "ERROR: Extracted tarball does not appear as $path\n" unless -d $path; |
| 579 | |
| 580 | return $path; |
| 581 | } |
| 582 | |
| 583 | |
| 584 | # produce the diff of a single file |
| 585 | sub file_diff { |
| 586 | my $outfh = shift; |
| 587 | my $cpan_file = shift; |
| 588 | my $perl_file = shift; |
| 589 | my $reverse = shift; |
| 590 | my $diff_opts = shift; |
| 591 | |
| 592 | |
| 593 | my @cmd = (DIFF_CMD, split ' ', $diff_opts); |
| 594 | if ($reverse) { |
| 595 | push @cmd, $perl_file, $cpan_file; |
| 596 | } |
| 597 | else { |
| 598 | push @cmd, $cpan_file, $perl_file; |
| 599 | } |
| 600 | my $result = `@cmd`; |
| 601 | |
| 602 | $result =~ s{^(--- |\+\+\+ )/tmp/[^/]+/}{$1}gm; |
| 603 | |
| 604 | print $outfh $result; |
| 605 | } |
| 606 | |
| 607 | |
| 608 | run(); |
| 609 | |