wildrepos almost done (except setperms etc)

implementation notes

  - new sugar role_names() to prefix an "@" to CREATOR, and any role
    names listed in the rc file.

  - invalidate the cache in rules() if the repo was missing.  Without
    this, an auto-create operation succeeds the ^C check and calls
    new_wild_repo(), but then -- due to the cached rules not containing
    a rule for CREATOR, the actual read/write fails.

  - treat roles (READERS, WRITERS, etc.) as group names that apply only
    to that particular repo.  Don't add them to %groups, because that
    would screw up caching, but add them in when memberships() is called
    for the user.

    This is why the membership call for the user also has a reponame
    tacked on -- i.e., a user's membership list varied depending on
    which repo you're talking about.

  - while we're about it, pretend we added "CREATOR = <content of
    gl-creator>" as another "role".  Makes things so much easier dealing
    with "RW+ = CREATOR"

  - searching for rules pertaining to foo/CREATOR/bar when looking at
    repo foo/sitaram/bar is done backwards from what g2 used to do.  G2
    used to play tricks with the do-eval'd file using global variables
    so that what you get after the do may not even contain 'CREATOR'.

    We go the other way.  We replace sitaram with CREATOR and start
    looking for memberships of *both* foo/sitaram/bar and
    foo/CREATOR/bar.

  - this doesn't work (because we don't know *what* to replace) for
    missing repos if GL_USER is not set.  This means that 'gitolite
    access ...' queries (which do not set GL_USER) cannot be used
    reliably for non-existant repos.

    Since a ^C check is the only meaningful one for a non-existent repo,
    this means you cannot do that from 'gitolite access'.

    'GL_USER=luser gitolite info' will still work though ;-)

all in all, much cleaner and simpler than g2.

src/Gitolite/Conf/Load.pm

@@ -229,6 +229,9 @@ sub load_1 {
         $lastuser = $user;
         @cached   = @rules;
 
+        # however if the repo was missing, invalidate the cache
+        $lastrepo = '' if repo_missing($repo);
+
         return @rules;
     }
 
@@ -309,15 +312,18 @@ sub user_roles {
 
     my %ret = ();
     my $f   = "$rc{GL_REPO_BASE}/$repo.git/gl-perms";
+    my @roles = ();
     if ( -f $f ) {
         my $fh = _open( "<", $f );
-        while (<$fh>) {
-            chomp;
+        chomp(@roles = <$fh>);
+    }
+    push @roles, "CREATOR = " . creator($repo);
+    for (@roles) {
         # READERS u3 u4 @g1
-            s/^\s+//; s/ +$//; s/=/ /; s/\s+/ /g; s/\@//;
+        s/^\s+//; s/ +$//; s/=/ /; s/\s+/ /g; s/^\@//;
         my ( $role, @members ) = split;
         # role = READERS, members = u3, u4, @g1
-            if ( not $rc{ROLES}{$role} ) {
+        if ( $role ne 'CREATOR' and not $rc{ROLES}{$role} ) {
             _warn "role '$role' not allowed, ignoring";
             next;
         }
@@ -330,23 +336,36 @@ sub user_roles {
             $ret{ '@' . $role } = 1 if $m eq $user or $eg{$m};
         }
     }
-    }
+
     return keys %ret;
 }
 
 sub generic_name {
     my $base  = shift;
     my $base2 = '';
-    my $f     = "$rc{GL_REPO_BASE}/$base.git/gl-creator";
-    if ( -f $f ) {
     my $creator;
-        chomp( $creator = slurp($f) );
-        ( $base2 = $base ) =~ s(/$creator/)(/CREATOR/);
+
+    # get the creator name.  For not-yet-born repos this is $ENV{GL_USER},
+    # which should be set in all cases that we care about, viz., where we are
+    # checking ^C permissions before new_wild_repo(), and the info command.
+    # In particular, 'gitolite access' can't be used to check ^C perms.
+    $creator = creator($base);
+
+    ( $base2 = $base ) =~ s(/$creator/)(/CREATOR/) if $creator;
     $base2 = '' if $base2 eq $base;    # if there was no change
-    }
+
     return $base2;
 }
 
+sub creator {
+    my $repo = shift;
+    return ( $ENV{GL_USER} || '' ) if repo_missing($repo);
+    my $f       = "$rc{GL_REPO_BASE}/$repo.git/gl-creator";
+    my $creator = '';
+    chomp( $creator = slurp($f) ) if -f $f;
+    return $creator;
+}
+
 # ----------------------------------------------------------------------
 # api functions
 # ----------------------------------------------------------------------

src/Gitolite/Conf/Sugar.pm

@@ -67,6 +67,7 @@ sub sugar {
     $lines = option($lines);       # must come after rw_cdm
     $lines = owner_desc($lines);
     $lines = name_vref($lines);
+    $lines = role_names($lines);
 
     return $lines;
 }
@@ -173,5 +174,30 @@ sub name_vref {
     return \@ret;
 }
 
+sub role_names {
+    my $lines = shift;
+    my @ret;
+
+    # <perm> [<ref>] = <user list containing CREATOR|READERS|WRITERS>
+    #   ->  same but with "@" prepended to rolenames
+
+    for my $line (@$lines) {
+        if ( $line =~ /^(-|C|R|RW\+?(?:C?D?|D?C?)M?) (.* )?= (.+)/ ) {
+            my($p, $r) = ($1, $2);
+            my $u = '';
+            for (split ' ', $3) {
+                $_ = "\@$_" if $_ eq 'CREATOR' or $rc{ROLES}{$_};
+                $u .= " $_";
+            }
+            $r ||= '';
+            # mind the spaces (or play safe and run cleanup_conf_line again)
+            push @ret, cleanup_conf_line("$p $r = $u");
+        } else {
+            push @ret, $line;
+        }
+    }
+    return \@ret;
+}
+
 1;