Add basic module manager, patch courtesy of danieldg.. still needs some work/review, but looks good

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@10426 e03df62e-2008-0410-955e-edbf42e46eb7

2 files changed, 250 insertions, 1 deletions

diff --git a/make/configure.pm b/make/configure.pm
index e9c1a04c3..ba586e3e6 100644
--- a/make/configure.pm
+++ b/make/configure.pm
@@ -20,7 +20,7 @@ use warnings FATAL => qw(all);
 use Exporter 'import';
 use POSIX;
 use make::utilities;
-our @EXPORT = qw(promptnumeric dumphash is_dir getmodules getrevision getcompilerflags getlinkerflags getdependencies nopedantic resolve_directory yesno showhelp promptstring_s);
+our @EXPORT = qw(promptnumeric dumphash is_dir getmodules getrevision getcompilerflags getlinkerflags getdependencies getmodversion nopedantic resolve_directory yesno showhelp promptstring_s);
 
 my $no_svn = 0;
 
@@ -117,6 +117,21 @@ sub getdependencies {
 	return "";
 }
 
+sub getmodversion {
+	my ($file) = @_;
+	open(FLAGS, $file) or return "";
+	while (<FLAGS>) {
+		if ($_ =~ /^\/\* \$ModVersion: (.+) \*\/$/) {
+			my $x = translate_functions($1, $file);
+			next if ($x eq "");
+			close(FLAGS);
+			return $x;
+		}
+	}
+	close(FLAGS);
+	return "";
+}
+
 sub nopedantic {
 	my ($file) = @_;
 	open(FLAGS, $file) or return "";
diff --git a/modulemanager b/modulemanager
new file mode 100755
index 000000000..126c74218
--- /dev/null
+++ b/modulemanager
@@ -0,0 +1,234 @@
+#!/usr/bin/perl
+use strict;
+use warnings FATAL => qw(all);
+use LWP::Simple;
+
+use make::configure;
+
+our @modlist;
+
+my %installed;
+# $installed{name} = $version
+
+my %modules;
+# $modules{$name}{$version} = {
+#	url => URL of this version (or INSECURE/DEPRECATED)
+#	depends => [ 'm_foo 1.2.0-1.3.0', ... ]
+#	conflicts => [ ]
+#	from => URL of source document
+# }
+
+my %url_seen;
+
+sub parse_url;
+
+sub parse_url {
+	my $src = shift;
+	return if $url_seen{$src};
+	$url_seen{$src}++;
+
+	my $doc = get($src);
+	die "Could not retrieve $_" unless defined $doc;
+
+	my $mod;
+	for (split /\n+/, $doc) {
+		s/^\s+//; # ignore whitespace at start
+		if (/^module (\S+) ([0-9.]+) (\S+)/) {
+			my($name, $ver, $url) = ($1,$2,$3);
+			if ($modules{$name}{$ver}) {
+				my $origsrc = $modules{$name}{$ver}{from};
+				warn "Overriding module $name $ver defined from $origsrc with one from $src";
+			}
+			$mod = {
+				from => $src,
+				url => $url,
+				depends => [],
+				conflicts => [],
+			};
+			$modules{$name}{$ver} = $mod;
+		} elsif (/^depends (.*)/) {
+			push @{$mod->{depends}}, $1;
+		} elsif (/^conflicts (.*)/) {
+			push @{$mod->{conflicts}}, $1;
+		} elsif (m#^source (http://\S+)#) {
+			parse_url $1;
+		} else {
+			print "Unknown line in $src: $_\n";
+		}
+	}
+}
+
+open SRC, 'sources.list' or die "Could not open sources.list: $!";
+while (<SRC>) {
+	parse_url($_);
+}
+close SRC;
+
+getmodules();
+
+open my $verfile, 'src/version.sh' or die "Cannot determine inspircd version: $!";
+$_ = join '', <$verfile>;
+die "Cannot determine inspircd version" unless /InspIRCd-([0-9.]+)/;
+$installed{core} = $1;
+$modules{core}{$1} = {
+	url => 'NONE',
+	depends => [],
+	conflicts => [],
+	from => 'local file',
+};
+close $verfile;
+
+for my $modname (@modlist) {
+	my $mod = "m_$modname";
+	my $modfile = "src/modules/$mod.cpp";
+	my $ver = getmodversion($modfile) || '0.0';
+	$installed{$mod} = $ver;
+	next if $modules{$mod}{$ver};
+	$modules{$mod}{$ver} = {
+		url => 'NONE',
+		depends => [],
+		conflicts => [],
+		from => 'local file',
+	};
+}
+
+my %todo = %installed;
+
+sub ver_cmp {
+	($a,$b) = @_ if @_;
+	my @a = split /\./, $a;
+	my @b = split /\./, $b;
+	push @a, 0 while $#a < $#b;
+	push @b, 0 while $#b < $#a;
+	for my $i (0..$#a) {
+		my $d = $a[$i] <=> $b[$i];
+		return $d if $d;
+	}
+	return 0;
+}
+
+sub ver_in_range {
+	my($ver, $range) = @_;
+	return 1 unless defined $range;
+	if ($range =~ /(.*)-(.*)/) {
+		my($l,$h) = ($1,$2);
+		return 0 unless ver_cmp($ver, $l) >= 0;
+		return 0 unless ver_cmp($ver, $h) <= 0;
+		return 1;
+	}
+	return !ver_cmp($ver, $range);
+}
+
+sub find_mod_in_range {
+	my($mod,$vers) = @_;
+	my @versions = keys %{$modules{$mod}};
+	@versions = sort { ver_cmp() } @versions;
+	for my $ver (reverse @versions) {
+		return $ver if ver_in_range($ver, $vers);
+	}
+	return undef;
+}
+
+sub resolve_deps {
+	my $tries = 100;
+	my $changes = 'INIT';
+	my $fail = undef;
+	while ($changes && $tries) {
+		$tries--;
+		$changes = '';
+		$fail = undef;
+		my @modsnow = sort keys %todo;
+		for my $mod (@modsnow) {
+			my $ver = $todo{$mod};
+			my $info = $modules{$mod}{$ver} or die "no dependency information on $mod $ver";
+			for my $dep (@{$info->{depends}}) {
+				$dep =~ /^(\S+)(?: ([-0-9.]+))?/ or die "Bad dependency $dep from $info->{from}";
+				my($depmod, $depvers) = ($1,$2);
+				next if $todo{$depmod} && ver_in_range($todo{$depmod}, $depvers);
+				# need to install a dependency
+				my $depver = find_mod_in_range($depmod, $depvers);
+				if (defined $depver) {
+					$todo{$depmod} = $depver;
+					$changes .= " $mod-$ver->$depmod-$depver";
+				} else {
+					$fail ||= "Could not find module $depmod $depver required by $mod $ver";
+				}
+			}
+			for my $dep (@{$info->{conflicts}}) {
+				$dep =~ /^(\S+)(?: ([-0-9.]+))?/ or die "Bad dependency $dep from $info->{from}";
+				my($depmod, $depvers) = ($1,$2);
+				next unless $todo{$depmod} && ver_in_range($todo{$depmod}, $depvers);
+				# if there are changes this round, maybe the conflict won't come up after they are resolved.
+				$fail ||= "Cannot install: module $mod ($ver) conflicts with versions $depmod version $todo{depmod}";
+			}
+		}
+	}
+	if ($changes) {
+		print "Infinite dependency loop:$changes\n";
+		exit 1;
+	}
+	if ($fail) {
+		print "$fail\n";
+		exit 1;
+	}
+}
+
+my $action = lc shift @ARGV;
+
+if ($action eq 'install') {
+	for my $mod (@ARGV) {
+		my $vers = $mod =~ s/=([-0-9.]+)// ? $1 : undef;
+		$mod = lc $mod;
+		unless ($modules{$mod}) {
+			print "Cannot find module $mod\n";
+			exit 1;
+		}
+		my $ver = find_mod_in_range($mod, $vers);
+		unless ($ver) {
+			print "Cannot find suitable version of $mod\n";
+			exit 1;
+		}
+		$todo{$mod} = $ver;
+	}
+} elsif ($action eq 'upgrade') {
+	for my $mod (keys %installed) {
+		next unless $mod =~ /^m_/;
+		$todo{$mod} = find_mod_in_range($mod);
+	}
+} else {
+	die "Unknown action $action"
+}
+
+resolve_deps();
+
+$| = 1; # immediate print of lines without \n
+
+for my $mod (keys %installed) {
+	next if $todo{$mod};
+	print "Uninstalling $mod $installed{$mod}\n";
+	unlink "src/modules/$mod.cpp";
+}
+for my $mod (sort keys %todo) {
+	my $ver = $todo{$mod};
+	my $oldver = $installed{$mod};
+	my $url = $modules{$mod}{$ver}{url};
+	if ($url eq 'INSECURE') {
+		print "WARNING: Version $ver of $mod is insecure!\n";
+		next;
+	} elsif ($url eq 'DEPRECATED') {
+		print "Note: version $ver of $mod is deprecated\n";
+		next;
+	}
+	next if $oldver && $oldver eq $ver;
+	if ($oldver) {
+		print "Upgrading $mod from $oldver to $ver using $url"
+	} else {
+		print "Installing $mod $ver from $url";
+	}
+	my $stat = getstore($url, "src/modules/$mod.cpp");
+	if ($stat == 200) {
+		print " - done\n";
+	} else {
+		print " - HTTP $stat\n";
+	}
+}