sugar high!

make it easy to handle syntactic sugar.  In summary, compile now calls
parse(sugar('gitolite.conf')).

Details:

  - cleanup_conf_line went from subar.pm to common.pm
  - explode() and minions went from conf.pm to the new explode.pm
  - the callback went away; everyone just passes whole arrays around now
  - the new sugar() takes a filename and returns a listref
  - all sugar scripts take and return a listref

  - the first "built-in" sugar is written (setting gitweb.owner and
    gitweb.description)

the new RC file format (of being a hash called %rc) is getting a nice
workout :-)

Gitolite/Common.pm

@@ -8,7 +8,7 @@ package Gitolite::Common;
   print2  dbg     _mkdir  _open   ln_sf     tsh_rc      sort_u
   say     _warn   _chdir  _print            tsh_text    list_phy_repos
   say2    _die            slurp             tsh_lines
-          trace                             tsh_try
+          trace           cleanup_conf_line tsh_try
           usage                             tsh_run
 );
 #>>>
@@ -143,6 +143,19 @@ sub sort_u {
     return \@sort_u;
 }
 
+sub cleanup_conf_line {
+    my $line = shift;
+
+    # kill comments, but take care of "#" inside *simple* strings
+    $line =~ s/^((".*?"|[^#"])*)#.*/$1/;
+    # normalise whitespace; keeps later regexes very simple
+    $line =~ s/=/ = /;
+    $line =~ s/\s+/ /g;
+    $line =~ s/^ //;
+    $line =~ s/ $//;
+    return $line;
+}
+
 {
     my @phy_repos = ();