Implement support for distribution specific version labels.

This will help us determine whether a version has been packaged by
a downstream distribution who quite often make arbitrary changes
which are a pain to provide support for.

Debian, we're looking at you.

configure

@@ -47,6 +47,7 @@ my ($opt_binary_dir,
     $opt_config_dir,
     $opt_data_dir,
     $opt_disable_interactive,
+    $opt_distribution_label,
     $opt_gid,
     $opt_log_dir,
     $opt_manual_dir,
@@ -70,18 +71,19 @@ GetOptions(
 	'help'	 => \&cmd_help,
 	'update' => \&cmd_update,
 
-	'disable-interactive' => \$opt_disable_interactive,
-	'binary-dir=s'        => \$opt_binary_dir,
-	'config-dir=s'        => \$opt_config_dir,
-	'data-dir=s'          => \$opt_data_dir,
-	'gid=s'               => \$opt_gid,
-	'log-dir=s'           => \$opt_log_dir,
-	'manual-dir=s'        => \$opt_manual_dir,
-	'module-dir=s'        => \$opt_module_dir,
-	'prefix=s'            => \$opt_prefix,
-	'socketengine=s'      => \$opt_socketengine,
-	'system'              => \$opt_system,
-	'uid=s'               => \$opt_uid,
+	'disable-interactive'  => \$opt_disable_interactive,
+	'distribution-label=s' => \$opt_distribution_label,
+	'binary-dir=s'         => \$opt_binary_dir,
+	'config-dir=s'         => \$opt_config_dir,
+	'data-dir=s'           => \$opt_data_dir,
+	'gid=s'                => \$opt_gid,
+	'log-dir=s'            => \$opt_log_dir,
+	'manual-dir=s'         => \$opt_manual_dir,
+	'module-dir=s'         => \$opt_module_dir,
+	'prefix=s'             => \$opt_prefix,
+	'socketengine=s'       => \$opt_socketengine,
+	'system'               => \$opt_system,
+	'uid=s'                => \$opt_uid,
 
 	# TODO: when the modulemanager rewrite is done these should be removed.
 	'disable-extras=s@' => \@opt_disableextras,
@@ -106,6 +108,7 @@ our $interactive = !(
 	defined $opt_config_dir ||
 	defined $opt_data_dir ||
 	defined $opt_disable_interactive ||
+	defined $opt_distribution_label ||
 	defined $opt_gid ||
 	defined $opt_log_dir ||
 	defined $opt_manual_dir ||
@@ -178,6 +181,12 @@ if (defined $opt_socketengine) {
 	}
 }
 
+# If the user has specified a distribution label then we use it in
+# place of the label from src/version.sh or Git.
+if (defined $opt_distribution_label) {
+	$version{LABEL} = $opt_distribution_label;
+}
+
 if (defined $opt_system) {
 	$config{BASE_DIR}   = $opt_prefix     || '/var/lib/inspircd';
 	$config{BINARY_DIR} = $opt_binary_dir || '/usr/sbin';
@@ -292,7 +301,7 @@ if (<src/modules/m_ssl_*.cpp> && prompt_bool $interactive, 'Would you like to ge
 }
 
 write_configure_cache %config if $interactive;
-parse_templates \%config, \%compiler;
+parse_templates \%config, \%compiler, \%version;
 
 print_format <<"EOM";
 

make/configure.pm

@@ -66,10 +66,10 @@ sub __get_socketengines {
 
 # TODO: when buildtool is done this can be mostly removed with
 #       the remainder being merged into parse_templates.
-sub __get_template_settings($$) {
+sub __get_template_settings($$$) {
 
 	# These are actually hash references
-	my ($config, $compiler) = @_;
+	my ($config, $compiler, $version) = @_;
 
 	# Start off by populating with the config
 	my %settings = %$config;
@@ -80,8 +80,7 @@ sub __get_template_settings($$) {
 	}
 
 	# Version information
-	my %version = get_version();
-	while (my ($key, $value) = each %version) {
+	while (my ($key, $value) = each %{$version}) {
 		$settings{'VERSION_' . $key} = $value;
 	}
 
@@ -143,6 +142,8 @@ MISC OPTIONS
   --clean                       Remove the configuration cache file and start
                                 the interactive configuration wizard.
   --disable-interactive         Disables the interactive configuration wizard.
+  --distribution-label=[text]   Sets a distribution specific version label in
+                                the build configuration.
   --gid=[id|name]               Sets the group to run InspIRCd as.
   --help                        Show this message and exit.
   --socketengine=[name]         Sets the socket engine to be used. Possible
@@ -169,7 +170,8 @@ sub cmd_update {
 	print "Updating...\n";
 	my %config = read_configure_cache();
 	my %compiler = get_compiler_info($config{CXX});
-	parse_templates(\%config, \%compiler);
+	my %version = get_version();
+	parse_templates(\%config, \%compiler, \%version);
 	print "Update complete!\n";
 	exit 0;
 }
@@ -263,13 +265,13 @@ sub get_property($$;$)
 	return defined $default ? $default : '';
 }
 
-sub parse_templates($$) {
+sub parse_templates($$$) {
 
 	# These are actually hash references
-	my ($config, $compiler) = @_;
+	my ($config, $compiler, $version) = @_;
 
 	# Collect settings to be used when generating files
-	my %settings = __get_template_settings($config, $compiler);
+	my %settings = __get_template_settings($config, $compiler, $version);
 
 	# Iterate through files in make/template.
 	foreach (<make/template/*>) {