--- a/bin/update	Tue Mar 20 12:19:16 2012 +0200
+++ b/bin/update	Tue Mar 20 12:43:51 2012 +0200
@@ -192,10 +192,18 @@
     done
 }
 
+function func_caller {
+    caller 1 | cut -d ' ' -f 2
+}
+
+function debug {
+    printf -v prefix "%s" $(func_caller)
+
+    log_debug "$prefix: $*"
+}
+
 function fail {
-    func=$(caller 1 | cut -d ' ' -f 2)
-    
-    log_error "$func: $*"
+    log_error "$(func_caller): $*"
 
     exit 2
 }
@@ -258,7 +266,7 @@
         echo '-u' "$SUDO_USER"
 
     elif [ $HOME ] && [ -e $HOME/.hgrc ]; then
-        log_debug "using .hgrc user"
+        debug "using .hgrc user"
         echo ''
 
     else
@@ -274,7 +282,7 @@
     local msg=$2
     local user_opt=$(hg_user)
     
-    log_debug "commit: $user_opt: $msg"
+    debug "$user_opt: $msg"
     hg commit $user_opt -m "$msg"
 }
 
@@ -284,13 +292,21 @@
     # target
     local dst=$1; shift
 
-    log_debug "check_update: $dst"
+    debug "$dst"
 
     # need update?
     local update=
 
-    if [ ! -e $dst ] || [ $UPDATE_FORCE ]; then
-        log_debug "  update forced"
+    if [ ${#@} == 0 ]; then
+        debug "  update: unknown deps"
+        update=y
+
+    elif [ ! -e $dst ]; then
+        debug "  update: dest missing"
+        update=y
+        
+    elif [ $UPDATE_FORCE ]; then
+        debug "  update: forced"
         update=y
     fi
 
@@ -304,12 +320,14 @@
             fail "$dst: Missing source: $dep"
 
         elif [ $ROOT/$dst -ot $ROOT/$dep ]; then
-            log_debug "  changed: $dep"
+            debug "  update: $dep"
             update=y
+        else
+            debug "  check: $dep"
         fi
     done
 
-    [ ! $update ] && log_debug "  up-to-date"
+    [ ! $update ] && debug "  up-to-date"
 
     # return
     [ $update ]
@@ -319,12 +337,12 @@
     local dst=$1; shift
     local tmp=$dst.new
 
-    log_debug "update: $dst"
+    debug "$dst"
     cmd "$@" > $ROOT/$tmp
 
     # compare
     if [ -e $ROOT/$dst ] && [ $UPDATE_DIFF ]; then
-        log_debug "  changes:"
+        debug "  changes:"
 
         # terse
         indent "        " diff --unified=1 $ROOT/$dst $ROOT/$tmp || true
@@ -332,12 +350,12 @@
     
     if [ $UPDATE_NOOP ]; then
         # cleanup
-        log_debug "  no-op"
+        debug "  no-op"
 
         cmd rm $ROOT/$tmp
     else
         # commit
-        log_debug "  update"
+        debug "  commit"
 
         cmd mv $ROOT/$tmp $ROOT/$dst
     fi
@@ -370,7 +388,7 @@
 
         do_update $dst "${cmd[@]}"
     else
-        log_debug "$msg: not changed"
+        log_skip "$msg: not changed"
 
     fi
 }
@@ -422,22 +440,38 @@
 
 ## actions
 # serial
-function update_serial {
-    local zone=$1; shift
-    
-    local serial=$SERIALS/$zone.serial
-   
+function do_update_serial {
+    local serial=$1
+
     # read
     local old=$(test -e $ROOT/$serial && cat $ROOT/$serial || echo '')
 
-    log_info "Updating $serial..."
 
     cmd $BIN/update-serial $ROOT/$serial
     
     # read
     local new=$(cat $ROOT/$serial)
         
-    log_debug "  $old -> $new"
+    debug "  $old -> $new"
+}
+
+function update_serial {
+    local zone=$1; shift
+    
+    local serial=$SERIALS/$zone.serial
+
+    # test
+    if ! check_update $serial "$@"; then
+        log_skip "Updating $serial: not changed"
+
+    elif [ $SERIAL_NOUPDATE ]; then
+        log_skip "Updating $serial: skipped"
+
+    else
+        log_info "Updating $serial..."
+
+        do_update_serial $serial
+    fi
 }
 
 function link_serial {
@@ -628,20 +662,22 @@
         copy_zone           includes        paivola.services        paivola.zone.services
 
     # serials
-    if [ $SERIAL_NOUPDATE ]; then
-        log "Updating serials: skipped"
-
-    else
-        log "Updating serials..."
+    log "Updating serials..."
 
-        #                   zone            base
-        update_serial       pvl
-        link_serial         10              pvl
-        link_serial         192.168         pvl
+    #                   zone            *deps
+    update_serial       pvl             $ZONES/hosts/pvl        $DATA/pvl.zone
+    update_serial       10              $ZONES/hosts/10         $DATA/10.zone
+    update_serial       192.168         $ZONES/hosts/192.168    $DATA/192.168.zone
 
-        update_serial       paivola
-        update_serial       194.197.235
-    fi
+    update_serial     paivola           \
+        $ZONES/hosts/paivola:*          \
+        $DATA/paivola.zone              \
+        $ZONES/includes/paivola:*       \
+        $ZONES/includes/paivola.*
+
+    update_serial     194.197.235       \
+        $ZONES/hosts/194.197.235        \
+        $DATA/194.197.235.zone          
 
     # zones
     log "Updating zones..."