File: installman

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#!./perl -w

BEGIN {
    @INC = qw(lib);

    # This needs to be at BEGIN time, before any use of Config
    # install_lib itself loads and imports Config into main::
    require './install_lib.pl';
}

use strict;

use Getopt::Long;
use ExtUtils::Packlist;
use Pod::Man;
use vars qw(%opts $packlist);

require './Porting/pod_lib.pl';
my %man1 = (map {($_->[0], $_->[1])} @{get_pod_metadata()->{master}});

$ENV{SHELL} = 'sh' if $^O eq 'os2';

my $patchlevel = substr($],3,2);
die "Patchlevel of perl ($patchlevel)",
    "and patchlevel of config.sh ($Config{'PERL_VERSION'}) don't match\n"
	if $patchlevel != $Config{'PERL_VERSION'};

my $usage =
"Usage:  installman --man1dir=/usr/wherever --man1ext=1
                   --man3dir=/usr/wherever --man3ext=3
	           --notify --verbose --silent --help
	Defaults are:
	man1dir = $Config{'installman1dir'};
	man1ext = $Config{'man1ext'};
	man3dir = $Config{'installman3dir'};
	man3ext = $Config{'man3ext'};
	--notify  (or -n) just lists commands that would be executed.
        --verbose (or -V) report all progress.
        --silent  (or -S) be silent. Only report errors.\n";

# --strip intentionally does nothing. By permitting installman to accept it
# without error, the Makefile can pass the same options to installperl and
# installman, which permits more simplification there than this comment costs.
GetOptions( \%opts,
            qw( man1dir=s man1ext=s man3dir=s man3ext=s
                destdir:s notify|n help|h|? silent|S verbose|V strip))
	|| die $usage;
die $usage if $opts{help};
$opts{destdir} //= '';

foreach my $pre (qw(man1 man3)) {
    $opts{"${pre}dir"} //= $opts{destdir} . $Config{"install${pre}dir"};
    $opts{"${pre}ext"} //= $Config{"${pre}ext"};
}
$opts{verbose} ||= $opts{notify};

#Sanity checks

-x  "./perl$Config{exe_ext}"
  or warn "./perl$Config{exe_ext} not found!  Have you run make?\n";
-d  "$opts{destdir}$Config{'installprivlib'}"
	|| warn "Perl library directory $Config{'installprivlib'} not found.
		Have you run make install?.  (Installing anyway.)\n";
-x "t/perl$Config{exe_ext}"		|| warn "WARNING: You've never run 'make test'!!!",
	"  (Installing anyway.)\n";

$packlist = ExtUtils::Packlist->new("$opts{destdir}$Config{installarchlib}/.packlist");

# Install the main pod pages.
pod2man(\%man1, $opts{man1dir}, $opts{man1ext}, 'pod');

# Install the pods for library modules.
{
    my $found = pods_to_install();
    pod2man($found->{$_}, $opts{man3dir}, $opts{man3ext}, 'lib')
        foreach qw(MODULE PRAGMA);
}

# Install the pods embedded in the installed scripts
my $has_man1dir = $opts{man1dir} ne '' && -d $opts{man1dir};
my $fh = open_or_die('utils.lst');
while (<$fh>) {
    next if /^#/;
    chomp;
    my ($path, $leaf) = m|^(\S*/(\S+))|;
    # Have we already installed the manpage for this? (eg perldoc)
    next if $man1{$leaf};
    pod2man({$leaf, $path}, $opts{man1dir}, $opts{man1ext});
    if ($has_man1dir) {
        if (my ($link) = m|#.*link\s*=\s*\S+/(\S+)|) {
            my $old = "$opts{man1dir}/$leaf.$opts{man1ext}";
            my $new = "$opts{man1dir}/$link.$opts{man1ext}";
	    unlink($new);
	    link($old, $new);
            $old =~ s/^\Q$opts{destdir}\E// if $opts{destdir};
            $new =~ s/^\Q$opts{destdir}\E// if $opts{destdir};
            $packlist->{$new} = { from => $old, type => 'link' };
	}
    }
}
close $fh or my_die("close 'utils.lst': $!");

sub pod2man {
    my($modpods, $mandir, $manext, $where) = @_;
    if ($mandir eq ' ' or $mandir eq '') {
        if ($where) {
            warn "Skipping installation of $where man pages.\n"
        } else {
            warn "Skipping installation of $_ man page.\n"
                foreach values %$modpods;
        }
        return;
    }

    if ($opts{verbose}) {
        if ($where) {
            print "installing from $where\n";
        } else {
            print "installing $_\n"
                foreach sort keys %$modpods;
        }
    }

    mkpath($mandir);

    foreach my $manpage (sort keys %$modpods) {
        my $mod = $modpods->{$manpage};

	# Skip files without pod docs
	my $has_pod;
        my $fh = open_or_die($mod);
        while (my $line = <$fh>) {
            if ($line =~ /^=head1\b/) {
                ++$has_pod;
                last;
            }
        }
	close $fh or my_die("close '$mod': $!");
        # Sadly it doesn't seem possible to re-use this handle for the call
        # to parse_from_file() below, as Pod::Man relies on source_filename(),
        # which Pod::Simple only sets accurately if it opens the file itself.

	unless ($has_pod)
	{
	    print "no documentation in $mod\n" if $opts{verbose};
	    next;
	}

	if ($^O eq 'os2' || $^O eq 'amigaos' || $^O eq 'uwin' || $^O eq 'cygwin') {
            $manpage =~ s#::#.#g;
	}
        my $tmp = "${mandir}/${manpage}.tmp";
	$manpage = "${mandir}/${manpage}.${manext}";

        my $parser = Pod::Man->new( section => $manext,
                                    utf8    => 1,
                                    official=> 1,
                                    center  => 'Perl Programmers Reference Guide'
                                  );
	my $xmanpage = $manpage;
	$xmanpage =~ s/^\Q$opts{'destdir'}\E// if $opts{'destdir'};
        print "  $xmanpage\n" unless $opts{silent};
        if (!$opts{notify} && $parser->parse_from_file($mod, $tmp)) {
            if (-s $tmp) {
                if (safe_rename($tmp, $manpage)) {
                    $packlist->{$xmanpage} = { type => 'file' };
                    next;
                }
            }
            unlink($tmp);
	}
    }
}

$packlist->write() unless $opts{notify};
print "  Installation complete\n" if $opts{verbose};

# ex: set ts=8 sts=4 sw=4 et: