[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 = $hash{"blib/arch"};
            print "Files found in blib/arch: installing files in blib/lib into architecture dependent library tree\n";
	}
	chdir($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: $!");
    }
    if ($pack{'write'}) {
	$dir = dirname($pack{'write'});
	mkpath($dir,0,0755);
	print "Writing $pack{'write'}\n";
	$packlist->write($pack{'write'});
    }
    umask $umask unless $Is_VMS;
}

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 argument-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};
e8aa0dbc	84	if ($source eq "blib/lib" and
	85	exists $hash{"blib/arch"} and
	86	directory_not_empty("blib/arch")) {
	87	$targetroot = $hash{"blib/arch"};
dcc96bbd	88	print "Files found in blib/arch: installing files in blib/lib into architecture dependent library tree\n";
456e5c25	89	}
4b6d56d3	90	chdir($source) or next;
	91	find(sub {
	92	my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
	93	$atime,$mtime,$ctime,$blksize,$blocks) = stat;
	94	return unless -f _;
	95	return if $_ eq ".exists";
456e5c25	96	my $targetdir = MY->catdir($targetroot,$File::Find::dir);
456e5c25	97	my $targetfile = MY->catfile($targetdir,$_);
4b6d56d3	98
f1387719	99	my $diff = 0;
4b6d56d3	100	if ( -f $targetfile && -s _ == $size) {
4b6d56d3	101	# We have a good chance, we can skip this one
fb73857a	102	$diff = compare($_,$targetfile);
4b6d56d3	103	} else {
	104	print "$_ differs\n" if $verbose>1;
	105	$diff++;
	106	}
	107
	108	if ($diff){
08ad6bd5	109	if (-f $targetfile){
f1387719	110	forceunlink($targetfile) unless $nonono;
08ad6bd5	111	} else {
	112	mkpath($targetdir,0,0755) unless $nonono;
	113	print "mkpath($targetdir,0,0755)\n" if $verbose>1;
	114	}
4b6d56d3	115	copy($_,$targetfile) unless $nonono;
f1387719	116	print "Installing $targetfile\n";
08ad6bd5	117	utime($atime,$mtime + $Is_VMS,$targetfile) unless $nonono>1;
4b6d56d3	118	print "utime($atime,$mtime,$targetfile)\n" if $verbose>1;
f1387719	119	$mode = 0444 \| ( $mode & 0111 ? 0111 : 0 );
4b6d56d3	120	chmod $mode, $targetfile;
	121	print "chmod($mode, $targetfile)\n" if $verbose>1;
	122	} else {
f1387719	123	print "Skipping $targetfile (unchanged)\n" if $verbose;
	124	}
	125
	126	if (! defined $inc_uninstall) { # it's called
	127	} elsif ($inc_uninstall == 0){
	128	inc_uninstall($_,$File::Find::dir,$verbose,1); # nonono set to 1
	129	} else {
	130	inc_uninstall($_,$File::Find::dir,$verbose,0); # nonono set to 0
4b6d56d3	131	}
354f3b56	132	$packlist->{$targetfile}++;
4b6d56d3	133
4b6d56d3	134	}, ".");
08ad6bd5	135	chdir($cwd) or Carp::croak("Couldn't chdir to $cwd: $!");
4b6d56d3	136	}
4b6d56d3	137	if ($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	}
239eb133	143	umask $umask unless $Is_VMS;
4b6d56d3	144	}
4b6d56d3	145
456e5c25	146	sub directory_not_empty ($) {
	147	my($dir) = @_;
	148	my $files = 0;
	149	find(sub {
	150	return if $_ eq ".exists";
	151	if (-f) {
	152	$File::Find::prune++;
	153	$files = 1;
	154	}
	155	}, $dir);
	156	return $files;
	157	}
	158
c3648e42	159	sub install_default {
	160	@_ < 2 or die "install_default should be called with 0 or 1 argument";
	161	my $FULLEXT = @_ ? shift : $ARGV[0];
	162	defined $FULLEXT or die "Do not know to where to write install log";
	163	my $INST_LIB = MM->catdir(MM->curdir,"blib","lib");
	164	my $INST_ARCHLIB = MM->catdir(MM->curdir,"blib","arch");
	165	my $INST_BIN = MM->catdir(MM->curdir,'blib','bin');
	166	my $INST_SCRIPT = MM->catdir(MM->curdir,'blib','script');
	167	my $INST_MAN1DIR = MM->catdir(MM->curdir,'blib','man1');
	168	my $INST_MAN3DIR = MM->catdir(MM->curdir,'blib','man3');
	169	install({
	170	read => "$Config{sitearchexp}/auto/$FULLEXT/.packlist",
	171	write => "$Config{installsitearch}/auto/$FULLEXT/.packlist",
456e5c25	172	$INST_LIB => (directory_not_empty($INST_ARCHLIB)) ?
	173	$Config{installsitearch} :
	174	$Config{installsitelib},
c3648e42	175	$INST_ARCHLIB => $Config{installsitearch},
	176	$INST_BIN => $Config{installbin} ,
	177	$INST_SCRIPT => $Config{installscript},
	178	$INST_MAN1DIR => $Config{installman1dir},
	179	$INST_MAN3DIR => $Config{installman3dir},
	180	},1,0,0);
	181	}
	182
4b6d56d3	183	sub uninstall {
354f3b56	184	use ExtUtils::Packlist;
4b6d56d3	185	my($fil,$verbose,$nonono) = @_;
4b6d56d3	186	die "no packlist file found: $fil" unless -f $fil;
f1387719	187	# my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
f1387719	188	# require $my_req; # Hairy, but for the first
354f3b56	189	my ($packlist) = ExtUtils::Packlist->new($fil);
354f3b56	190	foreach (sort(keys(%$packlist))) {
4b6d56d3	191	chomp;
4b6d56d3	192	print "unlink $_\n" if $verbose;
f1387719	193	forceunlink($_) unless $nonono;
4b6d56d3	194	}
4b6d56d3	195	print "unlink $fil\n" if $verbose;
456e5c25	196	close P;
f1387719	197	forceunlink($fil) unless $nonono;
	198	}
	199
	200	sub inc_uninstall {
	201	my($file,$libdir,$verbose,$nonono) = @_;
	202	my($dir);
f1387719	203	my %seen_dir = ();
456e5c25	204	foreach $dir (@INC, @PERL_ENV_LIB, @Config{qw(archlibexp
	205	privlibexp
	206	sitearchexp
	207	sitelibexp)}) {
f1387719	208	next if $dir eq ".";
f1387719	209	next if $seen_dir{$dir}++;
456e5c25	210	my($targetfile) = MY->catfile($dir,$libdir,$file);
f1387719	211	next unless -f $targetfile;
	212
	213	# The reason why we compare file's contents is, that we cannot
	214	# know, which is the file we just installed (AFS). So we leave
	215	# an identical file in place
	216	my $diff = 0;
	217	if ( -f $targetfile && -s _ == -s $file) {
	218	# We have a good chance, we can skip this one
fb73857a	219	$diff = compare($file,$targetfile);
f1387719	220	} else {
	221	print "#$file and $targetfile differ\n" if $verbose>1;
	222	$diff++;
	223	}
	224
	225	next unless $diff;
	226	if ($nonono) {
	227	if ($verbose) {
	228	$Inc_uninstall_warn_handler \|\|= new ExtUtils::Install::Warn;
	229	$libdir =~ s\|^\./\|\| ; # That's just cosmetics, no need to port. It looks prettier.
	230	$Inc_uninstall_warn_handler->add("$libdir/$file",$targetfile);
	231	}
	232	# if not verbose, we just say nothing
	233	} else {
	234	print "Unlinking $targetfile (shadowing?)\n";
	235	forceunlink($targetfile);
	236	}
	237	}
08ad6bd5	238	}
	239
	240	sub pm_to_blib {
	241	my($fromto,$autodir) = @_;
	242
	243	use File::Basename qw(dirname);
	244	use File::Copy qw(copy);
	245	use File::Path qw(mkpath);
fb73857a	246	use File::Compare qw(compare);
08ad6bd5	247	use AutoSplit;
f1387719	248	# my $my_req = $self->catfile(qw(auto ExtUtils Install forceunlink.al));
f1387719	249	# require $my_req; # Hairy, but for the first
08ad6bd5	250
68dc0745	251	if (!ref($fromto) && -r $fromto)
	252	{
	253	# Win32 has severe command line length limitations, but
	254	# can generate temporary files on-the-fly
	255	# so we pass name of file here - eval it to get hash
	256	open(FROMTO,"<$fromto") or die "Cannot open $fromto:$!";
	257	my $str = '$fromto = {qw{'.join('',<FROMTO>).'}}';
	258	eval $str;
	259	close(FROMTO);
	260	}
	261
08ad6bd5	262	my $umask = umask 0022 unless $Is_VMS;
	263	mkpath($autodir,0,0755);
	264	foreach (keys %$fromto) {
	265	next if -f $fromto->{$_} && -M $fromto->{$_} < -M $_;
fb73857a	266	unless (compare($_,$fromto->{$_})){
08ad6bd5	267	print "Skip $fromto->{$_} (unchanged)\n";
	268	next;
	269	}
	270	if (-f $fromto->{$_}){
f1387719	271	forceunlink($fromto->{$_});
08ad6bd5	272	} else {
	273	mkpath(dirname($fromto->{$_}),0,0755);
	274	}
	275	copy($_,$fromto->{$_});
cee7b94a	276	my($mode,$atime,$mtime) = (stat)[2,8,9];
	277	utime($atime,$mtime+$Is_VMS,$fromto->{$_});
	278	chmod(0444 \| ( $mode & 0111 ? 0111 : 0 ),$fromto->{$_});
08ad6bd5	279	print "cp $_ $fromto->{$_}\n";
	280	next unless /\.pm$/;
	281	autosplit($fromto->{$_},$autodir);
	282	}
	283	umask $umask unless $Is_VMS;
4b6d56d3	284	}
4b6d56d3	285
f1387719	286	package ExtUtils::Install::Warn;
	287
	288	sub new { bless {}, shift }
	289
	290	sub add {
	291	my($self,$file,$targetfile) = @_;
	292	push @{$self->{$file}}, $targetfile;
	293	}
	294
	295	sub DESTROY {
	296	my $self = shift;
	297	my($file,$i,$plural);
	298	foreach $file (sort keys %$self) {
	299	$plural = @{$self->{$file}} > 1 ? "s" : "";
	300	print "## Differing version$plural of $file found. You might like to\n";
	301	for (0..$#{$self->{$file}}) {
	302	print "rm ", $self->{$file}[$_], "\n";
	303	$i++;
	304	}
	305	}
	306	$plural = $i>1 ? "all those files" : "this file";
	307	print "## Running 'make install UNINST=1' will unlink $plural for you.\n";
	308	}
	309
4b6d56d3	310	1;
	311
	312	__END__
	313
	314	=head1 NAME
	315
	316	ExtUtils::Install - install files from here to there
	317
	318	=head1 SYNOPSIS
	319
	320	B<use ExtUtils::Install;>
	321
	322	B<install($hashref,$verbose,$nonono);>
	323
	324	B<uninstall($packlistfile,$verbose,$nonono);>
	325
08ad6bd5	326	B<pm_to_blib($hashref);>
08ad6bd5	327
4b6d56d3	328	=head1 DESCRIPTION
4b6d56d3	329
08ad6bd5	330	Both install() and uninstall() are specific to the way
4b6d56d3	331	ExtUtils::MakeMaker handles the installation and deinstallation of
	332	perl modules. They are not designed as general purpose tools.
	333
	334	install() takes three arguments. A reference to a hash, a verbose
	335	switch and a don't-really-do-it switch. The hash ref contains a
	336	mapping of directories: each key/value pair is a combination of
	337	directories to be copied. Key is a directory to copy from, value is a
	338	directory to copy to. The whole tree below the "from" directory will
	339	be copied preserving timestamps and permissions.
	340
	341	There are two keys with a special meaning in the hash: "read" and
	342	"write". After the copying is done, install will write the list of
1fef88e7	343	target files to the file named by C<$hashref-E<gt>{write}>. If there is
1fef88e7	344	another file named by C<$hashref-E<gt>{read}>, the contents of this file will
4b6d56d3	345	be merged into the written file. The read and the written file may be
	346	identical, but on AFS it is quite likely, people are installing to a
	347	different directory than the one where the files later appear.
	348
c3648e42	349	install_default() takes one or less arguments. If no arguments are
	350	specified, it takes $ARGV[0] as if it was specified as an argument.
	351	The argument is the value of MakeMaker's C<FULLEXT> key, like F<Tk/Canvas>.
	352	This function calls install() with the same arguments as the defaults
	353	the MakeMaker would use.
	354
de592821	355	The argument-less form is convenient for install scripts like
c3648e42	356
	357	perl -MExtUtils::Install -e install_default Tk/Canvas
	358
	359	Assuming this command is executed in a directory with populated F<blib>
	360	directory, it will proceed as if the F<blib> was build by MakeMaker on
	361	this machine. This is useful for binary distributions.
	362
4b6d56d3	363	uninstall() takes as first argument a file containing filenames to be
	364	unlinked. The second argument is a verbose switch, the third is a
	365	no-don't-really-do-it-now switch.
	366
08ad6bd5	367	pm_to_blib() takes a hashref as the first argument and copies all keys
	368	of the hash to the corresponding values efficiently. Filenames with
	369	the extension pm are autosplit. Second argument is the autosplit
	370	directory.
4b6d56d3	371
08ad6bd5	372	=cut