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#!/usr/bin/perl -w
#
# cmpVERSION - compare the current Perl source tree and a given tag
# for modules that have identical version numbers but different contents.
#
# with -d option, output the diffs too
# with -x option, exclude files from modules where blead is not upstream
#
# (after all, there are tools like core-cpan-diff that can already deal with
# them)
#
# Original by slaven@rezic.de, modified by jhi and matt.w.johnson@gmail.com.
# Adaptation to produce TAP by Abigail, folded back into this file by Nicholas
use strict;
use 5.006;
use ExtUtils::MakeMaker;
use File::Spec::Functions qw(devnull);
use Getopt::Long;
my ($diffs, $exclude_upstream, $tag_to_compare, $tap);
unless (GetOptions('diffs' => \$diffs,
'exclude|x' => \$exclude_upstream,
'tag=s' => \$tag_to_compare,
'tap' => \$tap,
) && @ARGV == 0) {
die "usage: $0 [ -d -x --tag TAG --tap]";
}
die "$0: This does not look like a Perl directory\n"
unless -f "perl.h" && -d "Porting";
die "$0: 'This is a Perl directory but does not look like Git working directory\n"
unless -d ".git";
my $null = devnull();
unless (defined $tag_to_compare) {
my $check = 'HEAD';
while(1) {
$check = `git describe --abbrev=0 $check 2>$null`;
chomp $check;
last unless $check =~ /-RC/;
$check .= '^';
}
$tag_to_compare = $check;
# Thanks to David Golden for this suggestion.
}
unless (length $tag_to_compare) {
die "$0: Git found, but no Git tags found\n"
unless $tap;
print "1..0 # SKIP: Git found, but no Git tags found\n";
exit 0;
}
my $tag_exists = `git --no-pager tag -l $tag_to_compare 2>$null`;
chomp $tag_exists;
unless ($tag_exists eq $tag_to_compare) {
die "$0: '$tag_to_compare' is not a known Git tag\n" unless $tap;
print "1..0 # SKIP: '$tag_to_compare' is not a known Git tag\n";
exit 0;
}
my %upstream_files;
if ($exclude_upstream) {
unshift @INC, 'Porting';
require Maintainers;
for my $m (grep {!defined $Maintainers::Modules{$_}{UPSTREAM}
or $Maintainers::Modules{$_}{UPSTREAM} ne 'blead'}
keys %Maintainers::Modules) {
$upstream_files{$_} = 1 for Maintainers::get_module_files($m);
}
}
# Files to skip from the check for one reason or another,
# usually because they pull in their version from some other file.
my %skip;
@skip{
'lib/Carp/Heavy.pm',
'lib/Config.pm', # no version number but contents will vary
'lib/Exporter/Heavy.pm',
'win32/FindExt.pm',
} = ();
# Files to skip just for particular version(s),
# usually due to some # mix-up
my %skip_versions = (
# 'some/sample/file.pm' => [ '1.23', '1.24' ],
'dist/threads/lib/threads.pm' => [ '1.83' ],
);
my $skip_dirs = qr|^t/lib|;
sub pm_file_from_xs {
my $xs = shift;
foreach my $try (sub {
# First try a .pm at the same level as the .xs file
# with the same basename
return shift =~ s/\.xs\z//r;
},
sub {
# Try for a (different) .pm at the same level, based
# on the directory name:
my ($path) = shift =~ m!^(.*)/!;
my ($last) = $path =~ m!([^-/]+)\z!;
return "$path/$last";
},
sub {
# Try to work out the extension's full package, and
# look for a .pm in lib/ based on that:
my ($path) = shift =~ m!^(.*)/!;
my ($last) = $path =~ m!([^/]+)\z!;
$last =~ tr !-!/!;
return "$path/lib/$last";
}) {
# For all cases, first look to see if the .pm file is generated.
my $base = $try->($xs);
return "${base}_pm.PL" if -f "${base}_pm.PL";
return "${base}.pm" if -f "${base}.pm";
}
die "No idea which .pm file corresponds to '$xs', so aborting";
}
# Key is the .pm file from which we check the version.
# Value is a reference to an array of files to check for differences
# The trivial case is a pure perl module, where the array holds one element,
# the perl module's file. The "fun" comes with XS modules, and the real fun
# with XS modules with more than one XS file, and "interesting" layouts.
my %module_diffs;
foreach (`git --no-pager diff --name-only $tag_to_compare --diff-filter=ACMRTUXB`) {
chomp;
next unless m/^(.*)\//;
my $this_dir = $1;
next if $this_dir =~ $skip_dirs || exists $skip{$_};
next if exists $upstream_files{$_};
if (/\.pm\z/ || m|^lib/.*\.pl\z| || /_pm\.PL\z/) {
push @{$module_diffs{$_}}, $_;
} elsif (/\.xs\z/ && !/\bt\b/) {
push @{$module_diffs{pm_file_from_xs($_)}}, $_;
}
}
unless (%module_diffs) {
print "1..1\nok 1 - No difference found\n" if $tap;
exit;
}
printf "1..%d\n" => scalar keys %module_diffs if $tap;
my $count;
my $diff_cmd = "git --no-pager diff $tag_to_compare ";
my $q = ($^O eq 'MSWin32' || $^O eq 'NetWare' || $^O eq 'VMS') ? '"' : "'";
my (@diff);
foreach my $pm_file (sort keys %module_diffs) {
# git has already told us that the files differ, so no need to grab each as
# a blob from git, and do the comparison ourselves.
my $pm_version = eval {MM->parse_version($pm_file)};
my $orig_pm_content = get_file_from_git($pm_file, $tag_to_compare);
my $orig_pm_version = eval {MM->parse_version(\$orig_pm_content)};
++$count;
if (!defined $orig_pm_version || $orig_pm_version eq 'undef') { # sigh
print "ok $count - SKIP Can't parse \$VERSION in $pm_file\n"
if $tap;
} elsif (!defined $pm_version || $pm_version eq 'undef') {
print "not ok $count - in $pm_file version was $orig_pm_version, now unparsable\n" if $tap;
} elsif ($pm_version ne $orig_pm_version) { # good
print "ok $count - $pm_file\n" if $tap;
} else {
if ($tap) {
foreach (sort @{$module_diffs{$pm_file}}) {
print "# $_" for `$diff_cmd $q$_$q`;
}
if (exists $skip_versions{$pm_file}
and grep $pm_version eq $_, @{$skip_versions{$pm_file}}) {
print "ok $count - SKIP $pm_file version $pm_version\n";
} else {
print "not ok $count - $pm_file\n";
}
} else {
push @diff, @{$module_diffs{$pm_file}};
print "$pm_file\n";
}
}
}
sub get_file_from_git {
my ($file, $tag) = @_;
local $/;
return scalar `git --no-pager show $tag:$file 2>$null`;
}
if ($diffs) {
for (sort @diff) {
print "\n";
system "$diff_cmd $q$_$q";
}
}
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