build: add lua-po conversation script

diff --git a/build/i18n-lua2po.pl b/build/i18n-lua2po.pl
new file mode 100755 (executable)
index 0000000..262b427
--- /dev/null
+++ b/build/i18n-lua2po.pl
@@ -0,0 +1,113 @@
+#!/usr/bin/perl
+
+@ARGV == 3 || die "Usage: $0 <source-dir> <dest-dir> <target-language>\n";
+
+my $source_dir  = shift @ARGV;
+my $target_dir  = shift @ARGV;
+my $target_lang = shift @ARGV;
+my $master_lang = "en";
+
+
+if( ! -d $target_dir )
+{
+       system('mkdir', '-p', $target_dir);
+}
+
+
+my %target_strings;
+
+
+if( open F, "find $source_dir -path '*/luasrc/i18n/*' -name '*.$target_lang.lua' |" )
+{
+       while( chomp( my $file = readline F ) )
+       {
+               if( open L, "< $file" )
+               {
+                       my ( $basename ) = $file =~ m{.+/([^/]+)\.\w+\.lua$};
+                       $target_strings{$basename} = { };
+
+                       while( chomp( my $entry = readline L ) )
+                       {
+                               my ( $k, $v );
+                               if( $entry =~ /^\s*(\w+)\s*=\s*\[\[(.+)\]\]/ )
+                               {
+                                       ( $k, $v ) = ( $1, $2 );
+                               }
+                               elsif( $entry =~ /^\s*(\w+)\s*=\s*'(.+)'/ )
+                               {
+                                       ( $k, $v ) = ( $1, $2 );
+                               }
+                               elsif( $entry =~ /^\s*(\w+)\s*=\s*"(.+)"/ )
+                               {
+                                       ( $k, $v ) = ( $1, $2 );
+                               }
+                               
+                               if( $k && $v )
+                               {
+                                       $v =~ s/"/\\"/g;
+                                       $target_strings{$basename}{$k} = $v;
+                               }
+                       }
+
+                       close L;
+               }
+       }
+
+       close F;
+}
+
+
+if( open F, "find . -path '*/luasrc/i18n/*' -name '*.$master_lang.lua' |" )
+{
+       while( chomp( my $file = readline F ) )
+       {
+               if( open L, "< $file" )
+               {
+                       my ( $basename ) = $file =~ m{.+/([^/]+)\.\w+\.lua$};
+
+                       if( open T, "> $target_dir/$basename.$target_lang.po" )
+                       {
+                               printf "Generating %-40s ",
+                                       "$target_dir/$basename.$target_lang.po";
+               
+                               printf T "#  %s.%s.po\n#  generated from %s\n\nmsgid \"\"\n" .
+                                        "msgstr \"Content-Type: text/plain; charset=UTF-8\"\n\n",
+                                       $basename, $target_lang, $file;
+               
+                               while( chomp( my $entry = readline L ) )
+                               {
+                                       my ( $k, $v );
+                                       if( $entry =~ /^\s*(\w+)\s*=\s*\[\[(.+)\]\]/ )
+                                       {
+                                               ( $k, $v ) = ( $1, $2 );
+                                       }
+                                       elsif( $entry =~ /^\s*(\w+)\s*=\s*'(.+)'/ )
+                                       {
+                                               ( $k, $v ) = ( $1, $2 );
+                                       }
+                                       elsif( $entry =~ /^\s*(\w+)\s*=\s*"(.+)"/ )
+                                       {
+                                               ( $k, $v ) = ( $1, $2 );
+                                       }
+                               
+                                       if( $k && $v )
+                                       {
+                                               $v =~ s/"/\\"/g;
+                                               printf T "#: %s:%d\n#. \"%s\"\nmsgid \"%s\"\nmsgstr \"%s\"\n\n",
+                                                       $file, $., $v, $k,
+                                                       ( $target_strings{$basename} && $target_strings{$basename}{$k} )
+                                                               ? $target_strings{$basename}{$k} : $v;
+                                       }
+                               }
+                               
+                               close T;
+                               
+                               print "done\n";
+                       }
+
+                       close L;
+               }
+       }
+
+       close F;
+}