Merge common code from installperl and installman into install_lib.pl

p4raw-id: //depot/perl@33862

1 files changed, 129 insertions, 0 deletions

diff --git a/install_lib.pl b/install_lib.pl
new file mode 100644
index 0000000000..7eeae1d33c
--- /dev/null
+++ b/install_lib.pl
@@ -0,0 +1,129 @@
+#!perl
+
+# Initialisation code and subroutines shared between installperl and installman
+# Probably installhtml needs to join the club.
+
+use strict;
+use vars qw($Is_VMS $Is_W32 $Is_OS2 $Is_Cygwin $Is_Darwin $Is_NetWare
+	    %opts $packlist);
+use subs qw(unlink link chmod);
+
+use Config;
+BEGIN {
+    if ($Config{userelocatableinc}) {
+	# This might be a considered a hack. Need to get information about the
+	# configuration from Config.pm *before* Config.pm expands any .../
+	# prefixes.
+	#
+	# So we set $^X to pretend that we're the already installed perl, so
+	# Config.pm doesits ... expansion off that location.
+
+	my $location = $Config{initialinstalllocation};
+	die <<'OS' unless defined $location;
+$Config{initialinstalllocation} is not defined - can't install a relocatable
+perl without this.
+OS
+	$^X = "$location/perl";
+	# And then remove all trace of ever having loaded Config.pm, so that
+	# it will reload with the revised $^X
+	undef %Config::;
+	delete $INC{"Config.pm"};
+	delete $INC{"Config_heavy.pl"};
+	# You never saw us. We weren't here.
+
+	require Config;
+	Config->import;
+    }
+}
+
+if ($Config{d_umask}) {
+    umask(022); # umasks like 077 aren't that useful for installations
+}
+
+$Is_VMS = $^O eq 'VMS';
+$Is_W32 = $^O eq 'MSWin32';
+$Is_OS2 = $^O eq 'os2';
+$Is_Cygwin = $^O eq 'cygwin';
+$Is_Darwin = $^O eq 'darwin';
+$Is_NetWare = $Config{osname} eq 'NetWare';
+
+sub unlink {
+    my(@names) = @_;
+    my($cnt) = 0;
+
+    return scalar(@names) if $Is_VMS;
+
+    foreach my $name (@names) {
+	next unless -e $name;
+	chmod 0777, $name if ($Is_OS2 || $Is_W32 || $Is_Cygwin || $Is_NetWare);
+	print "  unlink $name\n" if $opts{verbose};
+	( CORE::unlink($name) and ++$cnt
+	  or warn "Couldn't unlink $name: $!\n" ) unless $opts{notify};
+    }
+    return $cnt;
+}
+
+sub link {
+    my($from,$to) = @_;
+    my($success) = 0;
+
+    my $xfrom = $from;
+    $xfrom =~ s/^\Q$opts{destdir}\E// if $opts{destdir};
+    my $xto = $to;
+    $xto =~ s/^\Q$opts{destdir}\E// if $opts{destdir};
+    print $opts{verbose} ? "  ln $xfrom $xto\n" : "  $xto\n"
+	unless $opts{silent};
+    eval {
+	CORE::link($from, $to)
+	    ? $success++
+	    : ($from =~ m#^/afs/# || $to =~ m#^/afs/#)
+	      ? die "AFS"  # okay inside eval {}
+	      : die "Couldn't link $from to $to: $!\n"
+	  unless $opts{notify};
+	$packlist->{$xto} = { from => $xfrom, type => 'link' };
+    };
+    if ($@) {
+	warn "Replacing link() with File::Copy::copy(): $@";
+	print $opts{verbose} ? "  cp $from $xto\n" : "  $xto\n"
+	    unless $opts{silent};
+	print "  creating new version of $xto\n"
+		 if $Is_VMS and -e $to and !$opts{silent};
+	unless ($opts{notify} or File::Copy::copy($from, $to) and ++$success) {
+	    # Might have been that F::C::c can't overwrite the target
+	    warn "Couldn't copy $from to $to: $!\n"
+		unless -f $to and (chmod(0666, $to), unlink $to)
+			and File::Copy::copy($from, $to) and ++$success;
+	}
+	$packlist->{$xto} = { type => 'file' };
+    }
+    $success;
+}
+
+sub chmod {
+    my($mode,$name) = @_;
+
+    return if ($^O eq 'dos');
+    printf "  chmod %o %s\n", $mode, $name if $opts{verbose};
+    CORE::chmod($mode,$name)
+	|| warn sprintf("Couldn't chmod %o %s: $!\n", $mode, $name)
+      unless $opts{notify};
+}
+
+
+sub samepath {
+    my($p1, $p2) = @_;
+
+    return (lc($p1) eq lc($p2)) if ($Is_W32 || $Is_NetWare);
+
+    if ($p1 ne $p2) {
+	my($dev1, $ino1, $dev2, $ino2);
+	($dev1, $ino1) = stat($p1);
+	($dev2, $ino2) = stat($p2);
+	($dev1 == $dev2 && $ino1 == $ino2);
+    }
+    else {
+	1;
+    }
+}
+
+1;