#!/usr/bin/perl

# Copyright 2001-2016, Paul Johnson (paul@pjcj.net)

# This software is free.  It is licensed under the same terms as Perl itself.

# The latest version of this software should be available from my homepage:
# http://www.pjcj.net

require 5.006001;

use strict;
use warnings;

use Cwd;
use ExtUtils::MakeMaker;
use File::Copy;

$| = 1;

my $Version = "1.23";
my $Author  = 'paul@pjcj.net';
my @perlbug = ("perlbug", "-a", $Author,
                          "-s", "Installation of Devel::Cover $Version");
my $Perlbug = join " ", map { / / ? "'$_'" : $_ } @perlbug;
my $base    = "./";
my %inc     = map { -d $_ ? (($_ eq "." ? $_ : Cwd::abs_path($_)) => 1) : () }
                  @INC;
my @inc     = sort keys %inc;

open I, ">lib/Devel/Cover/Inc.pm"
    or die "Cannot open lib/Devel/Cover/Inc.pm: $!";
print I <<"EOI";
# Copyright 2001-2016, Paul Johnson (paul\@pjcj.net)

# This software is free.  It is licensed under the same terms as Perl itself.

# The latest version of this software should be available from my homepage:
# http://www.pjcj.net

# This file was automatically generated by Makefile.PL.

package Devel::Cover::Inc;

use strict;
use warnings;

our \$VERSION      = "$Version";
our \$Perl_version = '$]';
our \$Base         = '$base';
our \@Inc          = qw( @inc );
chomp (our \$Perl  = <<'EOV');  # Careful with \\\\ in the path
$^X
EOV

if (\$Perl_version ne \$]) {
    print STDERR <<"EOM";

This version of Devel::Cover was built with Perl version \$Perl_version.
It is now being run with Perl version \$].
Attempting to make adjustments, but you may find that some of your modules do
not have coverage data collected.  You may need to alter the +-inc, +-ignore
and +-select options.

EOM
    eval "use Cwd";
    my \%inc = map { -d \$_ ? ((\$_ eq "." ? \$_ : Cwd::abs_path(\$_)) => 1) : () }
                   \@INC;
    \@Inc = sort keys \%inc;
}

# TODO - check for threadedness, 64bits etc. ?

1
EOI
close I or die "Cannot close lib/Devel/Cover/Inc.pm: $!";

print "Writing tests ........ ";

for my $d (qw( t t/e2e )) {
    unless (mkdir $d) {
        die "Cannot mkdir $d: $!" unless -d $d;
    }
}

my @tests;
opendir D, "tests" or die "Cannot opendir tests: $!";
for my $t (readdir D) {
    next unless -f "tests/$t";
    next if $t =~ /\.(pm|pl|org|bak|uncoverable)$/;
    next if $t =~ /~$/;

    push @tests, $t;

    if ($t =~ /\.t/) {
        copy("tests/$t", "t/e2e/$t")
            or die "Cannot copy tests/$t to t/e2e/$t: $!";
        next
    }

    open T, ">t/e2e/a$t.t" or die "Cannot open t/e2e/a$t.t: $!";
    print T <<EOT;
#!$^X

# Copyright 2002-2016, Paul Johnson (paul\@pjcj.net)

# This software is free.  It is licensed under the same terms as Perl itself.

# The latest version of this software should be available from my homepage:
# http://www.pjcj.net

use strict;
use warnings;

use lib "$base/lib";
use lib "$base/blib/lib";
use lib "$base/blib/arch";
use lib "$base/t";

use Devel::Cover::Test;

my \$test = Devel::Cover::Test->new("$t");
\$test->run_test;
no warnings;
\$test  # for create_gold
EOT
    close T or die "Cannot close t/e2e/a$t.t: $!";
}
closedir D or die "Cannot closedir tests: $!";

s/^/tests\// for @tests;
push @tests, grep !/e2e/, glob "t/*/*.t";

if ($ENV{DEVEL_COVER_NO_TESTS}) {
    # don't run tests under p5cover
    print "removing all tests with DEVEL_COVER_NO_TESTS\n";
    system "rm -rf t/*";  # TODO portability
    @tests = ();
}

print "done\n\n";

my %checked;

sub check {
    my ($module, $text, $version) = @_;

    printf "checking for %-18s %-16s .... ",
           $module, $version ? "version $version" : "";

    {
        local $SIG{__WARN__} = sub {};
        eval "use $module";
    }
    (my $mod = $module) =~ s/::/\//g;
    if (my $m = $INC{"$mod.pm"}) {
        my $v = eval { no warnings; eval "\$${module}::VERSION" };
        printf "%-8s $m\n", $v;
        if ($version && $v < $version) {
            print "\n\n\n$text\n" unless $checked{$text}++;
            print "\n";
        }
    } else {
        print "not found";
        print "\n\n\n$text\n" unless $checked{$text}++;
        print "\n";
    }
};

my $d = <<EOM;
The coverage database can be stored in any of the Storable, JSON or Sereal
formats.  To use the Storable format, the Storable module is required.  This has
been a core module since perl-5.8.0.  To store the database in JSON format
JSON::PP can be used.  This has been a core module since perl-5.14.0.  If you
wish, you may install the JSON module which will be used in preference.  To use
the Sereal format, the Sereal module should be installed.  This is available on
CPAN.

Sereal is used if it is available.  Otherwise JSON is used, if available.
Otherwise Storable will be used.  The Sereal and JSON formats should be portable
between all systems, whereas Storable format may not be.
EOM

check "Storable", $d;
check "JSON",     $d;
check "JSON::PP", $d;
check "Sereal",   $d;

check "Digest::MD5", <<EOM;
Digest::MD5 is required to check whether covered files have changed.  You can
download Digest::MD5 from CPAN.
EOM

check "Test::More", <<EOM;
Test::More is required to run the Devel::Cover tests.  You can download
Test::More from CPAN.
EOM

check "Template", <<EOM, "2.00";
Template 2.00 is required to run the some HTML backends to cover and for
cpancover.  Unless you have specific requirements this should not be a problem,
but you will not be able to use these reports until you install the Template
Toolkit, available from CPAN.  In the meantime you may continue to use the rest
of Devel::Cover.
EOM

my $m = <<EOM;
One of PPI::HTML 1.07 or Perl::Tidy 20060719 is required to add syntax
highlighting to some HTML backends to cover and for cpancover.  Unless you have
specific requirements this should not be a problem, but you will not be able to
use syntax highlighting in these reports until you install PPI::HTML or
Perl::Tidy, available from the CPAN.  However, the rest of Devel::Cover will be
available as usual.
EOM

check "PPI::HTML",  $m, "1.07";
check "Perl::Tidy", $m, "20060719";

print "checking for Pod::Coverage      version 0.06     .... ";
my $e = <<EOM;
Pod::Coverage 0.06 is required to do pod coverage.  This will tell you how well
you have documented your modules.  Pod coverage will be unavailable until you
install this module, available from CPAN.  In the meantime, you may continue to
use the rest of Devel::Cover.
EOM

eval "use Pod::Coverage";
if (my $m = $INC{"Pod/Coverage.pm"}) {
    my $v = eval { no warnings; $Pod::Coverage::VERSION };
    print $v < 0.06 ? "$v\n\n\n$e\n\n" : "$v     $m\n";
    print "checking for Pod::Coverage::CountParents         .... ";
    $e = <<EOM;
Pod::Coverage::CountParents.pm is used for Pod coverage if it is available.  We
will fall back to using Pod::Coverage.pm.  If you want to use
Pod::Coverage::CountParents.pm, just install it from CPAN.
EOM
    eval "use Pod::Coverage::CountParents";
    if (my $m = $INC{"Pod/Coverage/CountParents.pm"}) {
        my $v = eval { no warnings; $Pod::Coverage::CountParents::VERSION };
        $v ||= "    ";
        print "$v     $m\n";
    } else {
        print "not found\n\n\n$e\n\n";
    }
} else {
    print "not found\n\n$e\n";
}

check "Test::Differences", <<EOM;
Test::Differences is used to display output from failed tests.  Hopefully there
won't be any failed tests, but if there are you will get output that may not be
a model of clarity.  If you do get test failures and you fancy helping me by
debugging them, then you might like to consider installing Test::Differences.
You can download Test::Differences from CPAN.
EOM

check "Browser::Open", <<EOM;
Browser::Open is used to launch a web browser when the -launch flag is specified
with HTML report formats. You can download Browser::Open from CPAN.
EOM

check "HTML::Entities", <<EOM;
HTML::Entities is used to run the HTML reports.  If you would like to use the
HTML report, please install HTML::Entities.  Otherwise, other reports will be
available as usual.  Because HTML reports are expected, HTML::Entities has been
added to the prerequisites.
EOM

my $latest_tested = "5.023009";
print <<EOM if $] > $latest_tested;

Devel::Cover $Version has not been tested with perl $].
Testing will take place against expected output from perl $latest_tested.
You may well find failing tests.

EOM

if ($] < 5.008001) {
    print <<EOM;

================================================================================

                                   IMPORTANT
                                   ---------

Devel::Cover $Version is not supported on perl $].  The last version of
Devel::Cover which was supported was version 1.22.  This version may not work.
I have not tested it.  If it does work it will not be fully functional.

If you decide to use it anyway, you are on your own.  If it works at all, there
will be some constructs for which coverage will not be collected, and you may
well encounter bugs which have been fixed in subsequent versions of perl.
EOM

    print <<EOM if $^O eq "MSWin32";

And things are even worse under Windows.  You may well find random bugs of
various severities.
EOM
    print <<EOM;

If you are actually using this version of Devel::Cover with perl $], please let
me know.  I don't want to know if you are just testing Devel::Cover, only if you
are seriously using this version to do code coverage analysis of real code.  If
I get no reports of such usage then I will remove support and delete the
workarounds for versions of perl below 5.8.1.

In order to use this version of Devel::Cover with perl $] you must set the
environment variable \$DEVEL_COVER_UNSUPPORTED

================================================================================

EOM
} elsif ($] < 5.008002) {
    print <<EOM;

Devel::Cover $Version mostly works on perl $], but you may encounter strange
behaviours (bugs) which have been fixed in subsequent versions of perl.  This is
particularly true if you are running a threaded perl.  Perl versions 5.8.2 and
above should work better.

EOM
}

print "\n" x 3;

$ExtUtils::MakeMaker::Verbose = 0;

my $opts = {
    NAME             => "Devel::Cover",
    VERSION          => $Version,
    AUTHOR           => 'Paul Johnson <paul@pjcj.net>',
    ABSTRACT_FROM    => "lib/Devel/Cover.pm",
    DIR              => [],
    EXE_FILES        => [ map "bin/$_", qw( cover gcov2perl cpancover ) ],
    PERL_MALLOC_OK   => 1,
    PREREQ_PM        => {
                            Storable      => 0,
                            "Digest::MD5" => 0,
                            "HTML::Entities" => 3.69,
                            $ENV{DEVEL_COVER_NO_TESTS}
                                ? ()
                                : ( "Test::More" => 0 )
                        },
    TYPEMAPS         => [ "utils/typemap" ],
    clean            => {
                            FILES => "t/e2e/* cover_db* t/e2e/*cover_db " .
                                     "README *.gcov *.out"
                        },
    dist             => { COMPRESS => "gzip --best --force" },
    test             => {
                            TESTS => $ENV{DEVEL_COVER_NO_TESTS}
                                         ? ""
                                         : "t/*/*.t"
                        },
    realclean        => $] < 5.008008 ?
                        {
                            FILES  => "lib/Devel/Cover/Inc.pm",
                            POSTOP => "\$(RM_RF) cover_db t/e2e"
                        } :
                        { FILES => "lib/Devel/Cover/Inc.pm cover_db t/e2e" },
};
# use Data::Dumper; print Dumper $opts;
WriteMakefile(%$opts);

print "\n";
print <<EOM if 0;

--------------------------------------------------------------------------------

I like to have some idea of the distribution of this software.  To that end I
would be very grateful for mail from you.  This will be used only to satisfy my
curiosity and to help me make decisions which may involve changes to the
module.

If you can run perlbug you can send me a success report with "make ok".
Failure reports with "make nok" are also appreciated.

If you have any questions or comments, mailing list details are available in the
README file, or send mail to me directly.

EOM

sub MY::postamble {
    my %tests;
    @tests{@tests} = map { (my $t = $_) =~ s/\W/_/g; "cover_db_$t" } @tests;
    my @reports = qw(
        compilation html_basic html_minimal html html_subtle sort text2 text vim
    );

    qq[
tags : pure_all
\t ctags --recurse --exclude=blib --exclude=Devel-Cover-* .

README : lib/Devel/Cover.pm
\t TERMCAP= COLUMNS=80 pod2text -s lib/Devel/Cover.pm | \\
    \$(PERL) -n \\
    -e 'print if (/NAME/         ... /^[A-Z ]+\$\$/) =~ /^\\d+\$\$/;' \\
    -e 'print if (/SYNOPSIS/     ... /^[A-Z ]+\$\$/) =~ /^\\d+\$\$/;' \\
    -e 'print if (/DESCRIPTION/  ... /^[A-Z ]+\$\$/) =~ /^\\d+\$\$/;' \\
    > README

show_version :
\t \@echo \$(VERSION)

ppm : ppd pure_all
\t tar cf Devel-Cover.tar blib
\t gzip --best --force Devel-Cover.tar
\t \$(PERL) -pi.bak \\
    -e 's/(OS NAME=")[^"]*/\$\$1MSWin32/;' \\
    -e 's/(ARCHITECTURE NAME=")[^"]*/\$\$1MSWin32-x86-multi-thread/;' \\
    -e 's/(CODEBASE HREF=")[^"]*/\$\$1Devel-Cover.tar.gz/;' \\
    Devel-Cover.ppd

TAINT = -T
TAINT =
COVER_OPTIONS =
PERL5OPT =

_run : pure_all
\t \$(PERL) \$(TAINT) -Iblib/lib -Iblib/arch -MDevel::Cover=-merge,0,`\$(PERL) -e '\$\$l = qx|grep __COVER__ \$\$ARGV[0]|; \$\$l =~ /__COVER__\\s+criteria\\s+(.*)/; (\$\$c = \$\$1 || "all") =~ s/\\s+/,/g; \$\$p = "\$\$1," if \$\$l =~ /__COVER__\\s+test_parameters\\s+(.*)/; print "\$\$p-coverage,\$\$c"' tests/\$(TEST)`,\$(COVER_OPTIONS) tests/\$(TEST)

COVER_PARAMETERS = \$(PERL) -e '\$\$l = qx|grep __COVER__ \$\$ARGV[0]|; \$\$u = "-uncoverable_file \$\$1" if \$\$l =~ /__COVER__\\s+uncoverable_file\\s+(.*)/; (\$\$p) = \$\$l =~ /__COVER__\\s+cover_parameters\\s+(.*)/; print "\$\$u \$\$p"' tests/\$(TEST)

html : _run
\t \$(PERL) -Mblib bin/cover `\$(COVER_PARAMETERS)` -report html

basic : _run
\t \$(PERL) -Mblib bin/cover `\$(COVER_PARAMETERS)` -report html_basic

out : _run
\t \$(PERL) -Mblib bin/cover `\$(COVER_PARAMETERS)` -report text > \$(TEST).out

text : out
\t \$(VISUAL) \$(TEST).out

wrun : pure_all
\t \$(PERL) \$(TAINT) -Iblib/lib -Iblib/arch -MDevel::Cover=-ignore,blib,-merge,0 tests/\$(TEST)

prove : pure_all
\t \$(PERL) -Iutils -MDevel::Cover::BuildUtils=prove_command -le '\$\$c = prove_command and print \$\$c and system \$\$c'

t : pure_all
\t \$(PERL) -Mblib bin/cover -delete
\t exec make test HARNESS_OPTIONS=j`\$(PERL) -Iutils -MDevel::Cover::BuildUtils=nice_cpus -e 'print nice_cpus'`:c HARNESS_TIMER=1

no_replace_ops_t : pure_all
\t DEVEL_COVER_OPTIONS=-replace_ops,0 exec make t

DB = cover_db

dump :
\t \$(PERL) -Mblib bin/cover -dump_db \$(DB)

diff : out
\t \$(PERL) utils/makeh strip_criterion 'time' \$(TEST).out
\t \$(PERL) utils/makeh strip_criterion ' pod' \$(TEST).out
\t gold="`\$(PERL) -Mblib -MDevel::Cover::Test -e '\$\$t = Devel::Cover::Test->new(qq(\$(TEST))); print join qq(.), \$\$t->cover_gold'`" && \$(EDITOR) -d "\$\$gold" \$(TEST).out

gold : pure_all
\t \$(PERL) utils/create_gold \$(TEST)

all_test :
\t exec \$(PERL) utils/all_versions make t

all_gold :
\t \$(PERL) utils/create_all_gold \$(TEST)

_delete_db : pure_all
\t rm -rf cover_db

_self_cover_tests : @{[sort values %tests]}
\t DEVEL_COVER_SELF=1 \$(PERL) -Mblib -MDevel::Cover bin/cover -silent -write cover_db @{[sort values %tests]}

self_cover : _self_cover_reports
\t \$(PERL) -Mblib bin/cover -report html_basic -launch
\t \$(PERL) -Mblib bin/cover -report vim

ok :
\t \@$Perlbug -okay  || echo "Please send your report manually to $Author"

nok :
\t \@$Perlbug -nokay || echo "Please send your report manually to $Author"
    ] . "\n" .

    join "\n",
         map("$tests{$_} : _delete_db\n" .
             "\t \@echo Running $tests{$_}\n" .
             "\t \@rm -rf $tests{$_}\n" .
             "\t \@DEVEL_COVER_SELF=1 \$(PERL) -Mblib -MDevel::Cover=-db,$tests{$_},-silent,1,-coverage,all,-ignore,tests/,-coverage,pod-also_private-xx $_\n",
             sort keys %tests),

         "_self_cover_reports : @{[map qq(report_$_), @reports]}\n",

         map("report_$_ : _self_cover_tests\n" .
             "\t \@echo Generating $_ report\n" .
             "\t \@DEVEL_COVER_SELF=1 \$(PERL) -Mblib -MDevel::Cover bin/cover -silent -report $_ > /dev/null\n",
             @reports)
}