[p5sagit/p5-mst-13.2.git] / lib / ExtUtils / Install.pm

package ExtUtils::Install;

$VERSION = substr q$Revision: 1.28 $, 10;
# $Date: 1998/01/25 07:08:24 $

use Exporter;
use Carp ();
use Config qw(%Config);
use vars qw(@ISA @EXPORT $VERSION);
@ISA = ('Exporter');
@EXPORT = ('install','uninstall','pm_to_blib', 'install_default');
$Is_VMS = $^O eq 'VMS';

my $splitchar = $^O eq 'VMS' ? '|' : ($^O eq 'os2' || $^O eq 'dos') ? ';' : ':';
my @PERL_ENV_LIB = split $splitchar, defined $ENV{'PERL5LIB'} ? $ENV{'PERL5LIB'} : $ENV{'PERLLIB'} || '';
my $Inc_uninstall_warn_handler;

#use vars qw( @EXPORT @ISA $Is_VMS );
#use strict;

sub forceunlink {
    chmod 0666, $_[0];
    unlink $_[0] or Carp::croak("Cannot forceunlink $_[0]: $!")
}

sub install {
    my($hash,$verbose,$nonono,$inc_uninstall) = @_;
    $verbose ||= 0;
    $nonono  ||= 0;

    use Cwd qw(cwd);
    use ExtUtils::MakeMaker; # to implement a MY class
    use ExtUtils::Packlist;
    use File::Basename qw(dirname);
    use File::Copy qw(copy);
    use File::Find qw(find);
    use File::Path qw(mkpath);
    use File::Compare qw(compare);

    my(%hash) = %$hash;
    my(%pack, $dir, $warn_permissions);
    my($packlist) = ExtUtils::Packlist->new();
    # -w doesn't work reliably on FAT dirs
    $warn_permissions++ if $^O eq 'MSWin32';
    local(*DIR);
    for (qw/read write/) {
	$pack{$_}=$hash{$_};
	delete $hash{$_};
    }
    my($source_dir_or_file);
    foreach $source_dir_or_file (sort keys %hash) {
	#Check if there are files, and if yes, look if the corresponding
	#target directory is writable for us
	opendir DIR, $source_dir_or_file or next;
	for (readdir DIR) {
	    next if $_ eq "." || $_ eq ".." || $_ eq ".exists";
	    if (-w $hash{$source_dir_or_file} ||
		mkpath($hash{$source_dir_or_file})) {
		last;
	    } else {
		warn "Warning: You do not have permissions to " .
		    "install into $hash{$source_dir_or_file}"
		    unless $warn_permissions++;
	    }
	}
	closedir DIR;
    }
    $packlist->read($pack{"read"}) if (-f $pack{"read"});
    my $cwd = cwd();
    my $umask = umask 0 unless $Is_VMS;

    my($source);
    MOD_INSTALL: foreach $source (sort keys %hash) {
	#copy the tree to the target directory without altering
	#timestamp and permission and remember for the .packlist
	#file. The packlist file contains the absolute paths of the
	#install locations. AFS users may call this a bug. We'll have
	#to reconsider how to add the means to satisfy AFS users also.

	#October 1997: we want to install .pm files into archlib if
	#there are any files in arch. So we depend on having ./blib/arch
	#hardcoded here.
	my $targetroot = $hash{$source};
	if ($source eq "./blib/lib" and
	    exists $hash{"./blib/arch"} and
	    directory_not_empty("./blib/arch")) {
	    $targetroot = $hash{"./blib/arch"};
	}
	chdir($source) or next;
	find(sub {
	    my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
                         $atime,$mtime,$ctime,$blksize,$blocks) = stat;
	    return unless -f _;
	    return if $_ eq ".exists";
	    my $targetdir = MY->catdir($targetroot,$File::Find::dir);
	    my $targetfile = MY->catfile($targetdir,$_);

	    my $diff = 0;
	    if ( -f $targetfile && -s _ == $size) {
		# We have a good chance, we can skip this one
		$diff = compare($_,$targetfile);
	    } else {
		print "$_ differs\n" if $verbose>1;
		$diff++;
	    }

	    if ($diff){
		if (-f $targetfile){
		    forceunlink($targetfile) unless $nonono;
		} else {
		    mkpath($targetdir,0,0755) unless $nonono;
		    print "mkpath($targetdir,0,0755)\n" if $verbose>1;
		}
		copy($_,$targetfile) unless $nonono;
		print "Installing $targetfile\n";
		utime($atime,$mtime + $Is_VMS,$targetfile) unless $nonono>1;
		print "utime($atime,$mtime,$targetfile)\n" if $verbose>1;
		$mode = 0444 | ( $mode & 0111 ? 0111 : 0 );
		chmod $mode, $targetfile;
		print "chmod($mode, $targetfile)\n" if $verbose>1;
	    } else {
		print "Skipping $targetfile (unchanged)\n" if $verbose;
	    }
	    
	    if (! defined $inc_uninstall) { # it's called 
	    } elsif ($inc_uninstall == 0){
		inc_uninstall($_,$File::Find::dir,$verbose,1); # nonono set to 1
	    } else {
		inc_uninstall($_,$File::Find::dir,$verbose,0); # nonono set to 0
	    }
	    $packlist->{$targetfile}++;

	}, ".");
	chdir($cwd) or Carp::croak("Couldn't chdir to $cwd: $!");
    }
    umask $umask unless $Is_VMS;
    if ($pack{'write'}) {
	$dir = dirname($pack{'write'});
	mkpath($dir,0,0755);
	print "Writing $pack{'write'}\n";
	$packlist->write($pack{'write'});
    }
}

sub directory_not_empty ($) {
  my($dir) = @_;
  my $files = 0;
  find(sub {
	   return if $_ eq ".exists";
	   if (-f) {
	     $File::Find::prune++;
	     $files = 1;
	   }
       }, $dir);
  return $files;
}

sub install_default {
  @_ < 2 or die "install_default should be called with 0 or 1 argument";
  my $FULLEXT = @_ ? shift : $ARGV[0];
  defined $FULLEXT or die "Do not know to where to write install log";
  my $INST_LIB = MM->catdir(MM->curdir,"blib","lib");
  my $INST_ARCHLIB = MM->catdir(MM->curdir,"blib","arch");
  my $INST_BIN = MM->catdir(MM->curdir,'blib','bin');
  my $INST_SCRIPT = MM->catdir(MM->curdir,'blib','script');
  my $INST_MAN1DIR = MM->catdir(MM->curdir,'blib','man1');
  my $INST_MAN3DIR = MM->catdir(MM->curdir,'blib','man3');
  install({
	   read => "$Config{sitearchexp}/auto/$FULLEXT/.packlist",
	   write => "$Config{installsitearch}/auto/$FULLEXT/.packlist",
	   $INST_LIB => (directory_not_empty($INST_ARCHLIB)) ?
			 $Config{installsitearch} :
			 $Config{installsitelib},
	   $INST_ARCHLIB => $Config{installsitearch},
	   $INST_BIN => $Config{installbin} ,
	   $INST_SCRIPT => $Config{installscript},
	   $INST_MAN1DIR => $Config{installman1dir},
	   $INST_MAN3DIR => $Config{installman3dir},
	  },1,0,0);
}

sub uninstall {
    use ExtUtils::Packlist;
    my($fil,$verbose,$nonono) = @_;
    die "no packlist file found: $fil" unless -f $fil;
    # my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
    # require $my_req; # Hairy, but for the first
    my ($packlist) = ExtUtils::Packlist->new($fil);
    foreach (sort(keys(%$packlist))) {
	chomp;
	print "unlink $_\n" if $verbose;
	forceunlink($_) unless $nonono;
    }
    print "unlink $fil\n" if $verbose;
    close P;
    forceunlink($fil) unless $nonono;
}

sub inc_uninstall {
    my($file,$libdir,$verbose,$nonono) = @_;
    my($dir);
    my %seen_dir = ();
    foreach $dir (@INC, @PERL_ENV_LIB, @Config{qw(archlibexp
						  privlibexp
						  sitearchexp
						  sitelibexp)}) {
	next if $dir eq ".";
	next if $seen_dir{$dir}++;
	my($targetfile) = MY->catfile($dir,$libdir,$file);
	next unless -f $targetfile;

	# The reason why we compare file's contents is, that we cannot
	# know, which is the file we just installed (AFS). So we leave
	# an identical file in place
	my $diff = 0;
	if ( -f $targetfile && -s _ == -s $file) {
	    # We have a good chance, we can skip this one
	    $diff = compare($file,$targetfile);
	} else {
	    print "#$file and $targetfile differ\n" if $verbose>1;
	    $diff++;
	}

	next unless $diff;
	if ($nonono) {
	    if ($verbose) {
		$Inc_uninstall_warn_handler ||= new ExtUtils::Install::Warn;
		$libdir =~ s|^\./|| ; # That's just cosmetics, no need to port. It looks prettier.
		$Inc_uninstall_warn_handler->add("$libdir/$file",$targetfile);
	    }
	    # if not verbose, we just say nothing
	} else {
	    print "Unlinking $targetfile (shadowing?)\n";
	    forceunlink($targetfile);
	}
    }
}

sub pm_to_blib {
    my($fromto,$autodir) = @_;

    use File::Basename qw(dirname);
    use File::Copy qw(copy);
    use File::Path qw(mkpath);
    use File::Compare qw(compare);
    use AutoSplit;
    # my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
    # require $my_req; # Hairy, but for the first

    if (!ref($fromto) && -r $fromto)
     {
      # Win32 has severe command line length limitations, but
      # can generate temporary files on-the-fly
      # so we pass name of file here - eval it to get hash 
      open(FROMTO,"<$fromto") or die "Cannot open $fromto:$!";
      my $str = '$fromto = {qw{'.join('',<FROMTO>).'}}';
      eval $str;
      close(FROMTO);
     }

    my $umask = umask 0022 unless $Is_VMS;
    mkpath($autodir,0,0755);
    foreach (keys %$fromto) {
	next if -f $fromto->{$_} && -M $fromto->{$_} < -M $_;
	unless (compare($_,$fromto->{$_})){
	    print "Skip $fromto->{$_} (unchanged)\n";
	    next;
	}
	if (-f $fromto->{$_}){
	    forceunlink($fromto->{$_});
	} else {
	    mkpath(dirname($fromto->{$_}),0,0755);
	}
	copy($_,$fromto->{$_});
	my($mode,$atime,$mtime) = (stat)[2,8,9];
	utime($atime,$mtime+$Is_VMS,$fromto->{$_});
	chmod(0444 | ( $mode & 0111 ? 0111 : 0 ),$fromto->{$_});
	print "cp $_ $fromto->{$_}\n";
	next unless /\.pm$/;
	autosplit($fromto->{$_},$autodir);
    }
    umask $umask unless $Is_VMS;
}

package ExtUtils::Install::Warn;

sub new { bless {}, shift }

sub add {
    my($self,$file,$targetfile) = @_;
    push @{$self->{$file}}, $targetfile;
}

sub DESTROY {
    my $self = shift;
    my($file,$i,$plural);
    foreach $file (sort keys %$self) {
	$plural = @{$self->{$file}} > 1 ? "s" : "";
	print "## Differing version$plural of $file found. You might like to\n";
	for (0..$#{$self->{$file}}) {
	    print "rm ", $self->{$file}[$_], "\n";
	    $i++;
	}
    }
    $plural = $i>1 ? "all those files" : "this file";
    print "## Running 'make install UNINST=1' will unlink $plural for you.\n";
}

1;

__END__

=head1 NAME

ExtUtils::Install - install files from here to there

=head1 SYNOPSIS

B<use ExtUtils::Install;>

B<install($hashref,$verbose,$nonono);>

B<uninstall($packlistfile,$verbose,$nonono);>

B<pm_to_blib($hashref);>

=head1 DESCRIPTION

Both install() and uninstall() are specific to the way
ExtUtils::MakeMaker handles the installation and deinstallation of
perl modules. They are not designed as general purpose tools.

install() takes three arguments. A reference to a hash, a verbose
switch and a don't-really-do-it switch. The hash ref contains a
mapping of directories: each key/value pair is a combination of
directories to be copied. Key is a directory to copy from, value is a
directory to copy to. The whole tree below the "from" directory will
be copied preserving timestamps and permissions.

There are two keys with a special meaning in the hash: "read" and
"write". After the copying is done, install will write the list of
target files to the file named by C<$hashref-E<gt>{write}>. If there is
another file named by C<$hashref-E<gt>{read}>, the contents of this file will
be merged into the written file. The read and the written file may be
identical, but on AFS it is quite likely, people are installing to a
different directory than the one where the files later appear.

install_default() takes one or less arguments.  If no arguments are 
specified, it takes $ARGV[0] as if it was specified as an argument.  
The argument is the value of MakeMaker's C<FULLEXT> key, like F<Tk/Canvas>.  
This function calls install() with the same arguments as the defaults 
the MakeMaker would use.

The argumement-less form is convenient for install scripts like

  perl -MExtUtils::Install -e install_default Tk/Canvas

Assuming this command is executed in a directory with populated F<blib> 
directory, it will proceed as if the F<blib> was build by MakeMaker on 
this machine.  This is useful for binary distributions.

uninstall() takes as first argument a file containing filenames to be
unlinked. The second argument is a verbose switch, the third is a
no-don't-really-do-it-now switch.

pm_to_blib() takes a hashref as the first argument and copies all keys
of the hash to the corresponding values efficiently. Filenames with
the extension pm are autosplit. Second argument is the autosplit
directory.

=cut
Commit	Line	Data
4b6d56d3	1	package ExtUtils::Install;
4b6d56d3	2
456e5c25	3	$VERSION = substr q$Revision: 1.28 $, 10;
456e5c25	4	# $Date: 1998/01/25 07:08:24 $
f1387719	5
08ad6bd5	6	use Exporter;
08ad6bd5	7	use Carp ();
c3648e42	8	use Config qw(%Config);
f1387719	9	use vars qw(@ISA @EXPORT $VERSION);
4b6d56d3	10	@ISA = ('Exporter');
c3648e42	11	@EXPORT = ('install','uninstall','pm_to_blib', 'install_default');
08ad6bd5	12	$Is_VMS = $^O eq 'VMS';
08ad6bd5	13
39e571d4	14	my $splitchar = $^O eq 'VMS' ? '\|' : ($^O eq 'os2' \|\| $^O eq 'dos') ? ';' : ':';
d6abf24b	15	my @PERL_ENV_LIB = split $splitchar, defined $ENV{'PERL5LIB'} ? $ENV{'PERL5LIB'} : $ENV{'PERLLIB'} \|\| '';
f1387719	16	my $Inc_uninstall_warn_handler;
f1387719	17
08ad6bd5	18	#use vars qw( @EXPORT @ISA $Is_VMS );
4b6d56d3	19	#use strict;
4b6d56d3	20
f1387719	21	sub forceunlink {
	22	chmod 0666, $_[0];
	23	unlink $_[0] or Carp::croak("Cannot forceunlink $_[0]: $!")
	24	}
08ad6bd5	25
4b6d56d3	26	sub install {
f1387719	27	my($hash,$verbose,$nonono,$inc_uninstall) = @_;
4b6d56d3	28	$verbose \|\|= 0;
4b6d56d3	29	$nonono \|\|= 0;
08ad6bd5	30
	31	use Cwd qw(cwd);
	32	use ExtUtils::MakeMaker; # to implement a MY class
354f3b56	33	use ExtUtils::Packlist;
08ad6bd5	34	use File::Basename qw(dirname);
	35	use File::Copy qw(copy);
	36	use File::Find qw(find);
	37	use File::Path qw(mkpath);
fb73857a	38	use File::Compare qw(compare);
08ad6bd5	39
4b6d56d3	40	my(%hash) = %$hash;
354f3b56	41	my(%pack, $dir, $warn_permissions);
354f3b56	42	my($packlist) = ExtUtils::Packlist->new();
3e3baf6d	43	# -w doesn't work reliably on FAT dirs
3e3baf6d	44	$warn_permissions++ if $^O eq 'MSWin32';
354f3b56	45	local(*DIR);
4b6d56d3	46	for (qw/read write/) {
	47	$pack{$_}=$hash{$_};
	48	delete $hash{$_};
	49	}
08ad6bd5	50	my($source_dir_or_file);
08ad6bd5	51	foreach $source_dir_or_file (sort keys %hash) {
4b6d56d3	52	#Check if there are files, and if yes, look if the corresponding
4b6d56d3	53	#target directory is writable for us
08ad6bd5	54	opendir DIR, $source_dir_or_file or next;
f1387719	55	for (readdir DIR) {
4b6d56d3	56	next if $_ eq "." \|\| $_ eq ".." \|\| $_ eq ".exists";
456e5c25	57	if (-w $hash{$source_dir_or_file} \|\|
456e5c25	58	mkpath($hash{$source_dir_or_file})) {
4b6d56d3	59	last;
4b6d56d3	60	} else {
456e5c25	61	warn "Warning: You do not have permissions to " .
456e5c25	62	"install into $hash{$source_dir_or_file}"
cee7b94a	63	unless $warn_permissions++;
4b6d56d3	64	}
	65	}
	66	closedir DIR;
	67	}
354f3b56	68	$packlist->read($pack{"read"}) if (-f $pack{"read"});
4b6d56d3	69	my $cwd = cwd();
08ad6bd5	70	my $umask = umask 0 unless $Is_VMS;
4b6d56d3	71
4b6d56d3	72	my($source);
	73	MOD_INSTALL: foreach $source (sort keys %hash) {
	74	#copy the tree to the target directory without altering
	75	#timestamp and permission and remember for the .packlist
	76	#file. The packlist file contains the absolute paths of the
	77	#install locations. AFS users may call this a bug. We'll have
	78	#to reconsider how to add the means to satisfy AFS users also.
456e5c25	79
	80	#October 1997: we want to install .pm files into archlib if
	81	#there are any files in arch. So we depend on having ./blib/arch
	82	#hardcoded here.
	83	my $targetroot = $hash{$source};
	84	if ($source eq "./blib/lib" and
	85	exists $hash{"./blib/arch"} and
	86	directory_not_empty("./blib/arch")) {
	87	$targetroot = $hash{"./blib/arch"};
	88	}
4b6d56d3	89	chdir($source) or next;
	90	find(sub {
	91	my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
	92	$atime,$mtime,$ctime,$blksize,$blocks) = stat;
	93	return unless -f _;
	94	return if $_ eq ".exists";
456e5c25	95	my $targetdir = MY->catdir($targetroot,$File::Find::dir);
456e5c25	96	my $targetfile = MY->catfile($targetdir,$_);
4b6d56d3	97
f1387719	98	my $diff = 0;
4b6d56d3	99	if ( -f $targetfile && -s _ == $size) {
4b6d56d3	100	# We have a good chance, we can skip this one
fb73857a	101	$diff = compare($_,$targetfile);
4b6d56d3	102	} else {
	103	print "$_ differs\n" if $verbose>1;
	104	$diff++;
	105	}
	106
	107	if ($diff){
08ad6bd5	108	if (-f $targetfile){
f1387719	109	forceunlink($targetfile) unless $nonono;
08ad6bd5	110	} else {
	111	mkpath($targetdir,0,0755) unless $nonono;
	112	print "mkpath($targetdir,0,0755)\n" if $verbose>1;
	113	}
4b6d56d3	114	copy($_,$targetfile) unless $nonono;
f1387719	115	print "Installing $targetfile\n";
08ad6bd5	116	utime($atime,$mtime + $Is_VMS,$targetfile) unless $nonono>1;
4b6d56d3	117	print "utime($atime,$mtime,$targetfile)\n" if $verbose>1;
f1387719	118	$mode = 0444 \| ( $mode & 0111 ? 0111 : 0 );
4b6d56d3	119	chmod $mode, $targetfile;
	120	print "chmod($mode, $targetfile)\n" if $verbose>1;
	121	} else {
f1387719	122	print "Skipping $targetfile (unchanged)\n" if $verbose;
	123	}
	124
	125	if (! defined $inc_uninstall) { # it's called
	126	} elsif ($inc_uninstall == 0){
	127	inc_uninstall($_,$File::Find::dir,$verbose,1); # nonono set to 1
	128	} else {
	129	inc_uninstall($_,$File::Find::dir,$verbose,0); # nonono set to 0
4b6d56d3	130	}
354f3b56	131	$packlist->{$targetfile}++;
4b6d56d3	132
4b6d56d3	133	}, ".");
08ad6bd5	134	chdir($cwd) or Carp::croak("Couldn't chdir to $cwd: $!");
4b6d56d3	135	}
08ad6bd5	136	umask $umask unless $Is_VMS;
4b6d56d3	137	if ($pack{'write'}) {
	138	$dir = dirname($pack{'write'});
	139	mkpath($dir,0,0755);
	140	print "Writing $pack{'write'}\n";
354f3b56	141	$packlist->write($pack{'write'});
4b6d56d3	142	}
	143	}
	144
456e5c25	145	sub directory_not_empty ($) {
	146	my($dir) = @_;
	147	my $files = 0;
	148	find(sub {
	149	return if $_ eq ".exists";
	150	if (-f) {
	151	$File::Find::prune++;
	152	$files = 1;
	153	}
	154	}, $dir);
	155	return $files;
	156	}
	157
c3648e42	158	sub install_default {
	159	@_ < 2 or die "install_default should be called with 0 or 1 argument";
	160	my $FULLEXT = @_ ? shift : $ARGV[0];
	161	defined $FULLEXT or die "Do not know to where to write install log";
	162	my $INST_LIB = MM->catdir(MM->curdir,"blib","lib");
	163	my $INST_ARCHLIB = MM->catdir(MM->curdir,"blib","arch");
	164	my $INST_BIN = MM->catdir(MM->curdir,'blib','bin');
	165	my $INST_SCRIPT = MM->catdir(MM->curdir,'blib','script');
	166	my $INST_MAN1DIR = MM->catdir(MM->curdir,'blib','man1');
	167	my $INST_MAN3DIR = MM->catdir(MM->curdir,'blib','man3');
	168	install({
	169	read => "$Config{sitearchexp}/auto/$FULLEXT/.packlist",
	170	write => "$Config{installsitearch}/auto/$FULLEXT/.packlist",
456e5c25	171	$INST_LIB => (directory_not_empty($INST_ARCHLIB)) ?
	172	$Config{installsitearch} :
	173	$Config{installsitelib},
c3648e42	174	$INST_ARCHLIB => $Config{installsitearch},
	175	$INST_BIN => $Config{installbin} ,
	176	$INST_SCRIPT => $Config{installscript},
	177	$INST_MAN1DIR => $Config{installman1dir},
	178	$INST_MAN3DIR => $Config{installman3dir},
	179	},1,0,0);
	180	}
	181
4b6d56d3	182	sub uninstall {
354f3b56	183	use ExtUtils::Packlist;
4b6d56d3	184	my($fil,$verbose,$nonono) = @_;
4b6d56d3	185	die "no packlist file found: $fil" unless -f $fil;
f1387719	186	# my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
f1387719	187	# require $my_req; # Hairy, but for the first
354f3b56	188	my ($packlist) = ExtUtils::Packlist->new($fil);
354f3b56	189	foreach (sort(keys(%$packlist))) {
4b6d56d3	190	chomp;
4b6d56d3	191	print "unlink $_\n" if $verbose;
f1387719	192	forceunlink($_) unless $nonono;
4b6d56d3	193	}
4b6d56d3	194	print "unlink $fil\n" if $verbose;
456e5c25	195	close P;
f1387719	196	forceunlink($fil) unless $nonono;
	197	}
	198
	199	sub inc_uninstall {
	200	my($file,$libdir,$verbose,$nonono) = @_;
	201	my($dir);
f1387719	202	my %seen_dir = ();
456e5c25	203	foreach $dir (@INC, @PERL_ENV_LIB, @Config{qw(archlibexp
	204	privlibexp
	205	sitearchexp
	206	sitelibexp)}) {
f1387719	207	next if $dir eq ".";
f1387719	208	next if $seen_dir{$dir}++;
456e5c25	209	my($targetfile) = MY->catfile($dir,$libdir,$file);
f1387719	210	next unless -f $targetfile;
	211
	212	# The reason why we compare file's contents is, that we cannot
	213	# know, which is the file we just installed (AFS). So we leave
	214	# an identical file in place
	215	my $diff = 0;
	216	if ( -f $targetfile && -s _ == -s $file) {
	217	# We have a good chance, we can skip this one
fb73857a	218	$diff = compare($file,$targetfile);
f1387719	219	} else {
	220	print "#$file and $targetfile differ\n" if $verbose>1;
	221	$diff++;
	222	}
	223
	224	next unless $diff;
	225	if ($nonono) {
	226	if ($verbose) {
	227	$Inc_uninstall_warn_handler \|\|= new ExtUtils::Install::Warn;
	228	$libdir =~ s\|^\./\|\| ; # That's just cosmetics, no need to port. It looks prettier.
	229	$Inc_uninstall_warn_handler->add("$libdir/$file",$targetfile);
	230	}
	231	# if not verbose, we just say nothing
	232	} else {
	233	print "Unlinking $targetfile (shadowing?)\n";
	234	forceunlink($targetfile);
	235	}
	236	}
08ad6bd5	237	}
	238
	239	sub pm_to_blib {
	240	my($fromto,$autodir) = @_;
	241
	242	use File::Basename qw(dirname);
	243	use File::Copy qw(copy);
	244	use File::Path qw(mkpath);
fb73857a	245	use File::Compare qw(compare);
08ad6bd5	246	use AutoSplit;
f1387719	247	# my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
f1387719	248	# require $my_req; # Hairy, but for the first
08ad6bd5	249
68dc0745	250	if (!ref($fromto) && -r $fromto)
	251	{
	252	# Win32 has severe command line length limitations, but
	253	# can generate temporary files on-the-fly
	254	# so we pass name of file here - eval it to get hash
	255	open(FROMTO,"<$fromto") or die "Cannot open $fromto:$!";
	256	my $str = '$fromto = {qw{'.join('',<FROMTO>).'}}';
	257	eval $str;
	258	close(FROMTO);
	259	}
	260
08ad6bd5	261	my $umask = umask 0022 unless $Is_VMS;
	262	mkpath($autodir,0,0755);
	263	foreach (keys %$fromto) {
	264	next if -f $fromto->{$_} && -M $fromto->{$_} < -M $_;
fb73857a	265	unless (compare($_,$fromto->{$_})){
08ad6bd5	266	print "Skip $fromto->{$_} (unchanged)\n";
	267	next;
	268	}
	269	if (-f $fromto->{$_}){
f1387719	270	forceunlink($fromto->{$_});
08ad6bd5	271	} else {
	272	mkpath(dirname($fromto->{$_}),0,0755);
	273	}
	274	copy($_,$fromto->{$_});
cee7b94a	275	my($mode,$atime,$mtime) = (stat)[2,8,9];
	276	utime($atime,$mtime+$Is_VMS,$fromto->{$_});
	277	chmod(0444 \| ( $mode & 0111 ? 0111 : 0 ),$fromto->{$_});
08ad6bd5	278	print "cp $_ $fromto->{$_}\n";
	279	next unless /\.pm$/;
	280	autosplit($fromto->{$_},$autodir);
	281	}
	282	umask $umask unless $Is_VMS;
4b6d56d3	283	}
4b6d56d3	284
f1387719	285	package ExtUtils::Install::Warn;
	286
	287	sub new { bless {}, shift }
	288
	289	sub add {
	290	my($self,$file,$targetfile) = @_;
	291	push @{$self->{$file}}, $targetfile;
	292	}
	293
	294	sub DESTROY {
	295	my $self = shift;
	296	my($file,$i,$plural);
	297	foreach $file (sort keys %$self) {
	298	$plural = @{$self->{$file}} > 1 ? "s" : "";
	299	print "## Differing version$plural of $file found. You might like to\n";
	300	for (0..$#{$self->{$file}}) {
	301	print "rm ", $self->{$file}[$_], "\n";
	302	$i++;
	303	}
	304	}
	305	$plural = $i>1 ? "all those files" : "this file";
	306	print "## Running 'make install UNINST=1' will unlink $plural for you.\n";
	307	}
	308
4b6d56d3	309	1;
	310
	311	__END__
	312
	313	=head1 NAME
	314
	315	ExtUtils::Install - install files from here to there
	316
	317	=head1 SYNOPSIS
	318
	319	B<use ExtUtils::Install;>
	320
	321	B<install($hashref,$verbose,$nonono);>
	322
	323	B<uninstall($packlistfile,$verbose,$nonono);>
	324
08ad6bd5	325	B<pm_to_blib($hashref);>
08ad6bd5	326
4b6d56d3	327	=head1 DESCRIPTION
4b6d56d3	328
08ad6bd5	329	Both install() and uninstall() are specific to the way
4b6d56d3	330	ExtUtils::MakeMaker handles the installation and deinstallation of
	331	perl modules. They are not designed as general purpose tools.
	332
	333	install() takes three arguments. A reference to a hash, a verbose
	334	switch and a don't-really-do-it switch. The hash ref contains a
	335	mapping of directories: each key/value pair is a combination of
	336	directories to be copied. Key is a directory to copy from, value is a
	337	directory to copy to. The whole tree below the "from" directory will
	338	be copied preserving timestamps and permissions.
	339
	340	There are two keys with a special meaning in the hash: "read" and
	341	"write". After the copying is done, install will write the list of
1fef88e7	342	target files to the file named by C<$hashref-E<gt>{write}>. If there is
1fef88e7	343	another file named by C<$hashref-E<gt>{read}>, the contents of this file will
4b6d56d3	344	be merged into the written file. The read and the written file may be
	345	identical, but on AFS it is quite likely, people are installing to a
	346	different directory than the one where the files later appear.
	347
c3648e42	348	install_default() takes one or less arguments. If no arguments are
	349	specified, it takes $ARGV[0] as if it was specified as an argument.
	350	The argument is the value of MakeMaker's C<FULLEXT> key, like F<Tk/Canvas>.
	351	This function calls install() with the same arguments as the defaults
	352	the MakeMaker would use.
	353
	354	The argumement-less form is convenient for install scripts like
	355
	356	perl -MExtUtils::Install -e install_default Tk/Canvas
	357
	358	Assuming this command is executed in a directory with populated F<blib>
	359	directory, it will proceed as if the F<blib> was build by MakeMaker on
	360	this machine. This is useful for binary distributions.
	361
4b6d56d3	362	uninstall() takes as first argument a file containing filenames to be
	363	unlinked. The second argument is a verbose switch, the third is a
	364	no-don't-really-do-it-now switch.
	365
08ad6bd5	366	pm_to_blib() takes a hashref as the first argument and copies all keys
	367	of the hash to the corresponding values efficiently. Filenames with
	368	the extension pm are autosplit. Second argument is the autosplit
	369	directory.
4b6d56d3	370
08ad6bd5	371	=cut