Add experimental ruleset manager

mkit.ini

 [files]
     bin     = src/imapdomo
     share   = src/imapdomo.lua
+    share   = src/imaprules.lua
     share   = src/main.lua
 
 #mkit version=0.0.40

packaging/debian/install

 /usr/bin/imapdomo
 /usr/share/imapdomo/imapdomo.lua
+/usr/share/imapdomo/imaprules.lua
 /usr/share/imapdomo/main.lua

packaging/template.spec

 %dir %{_datadir}/%{name}
 %{_bindir}/%{name}
 %{_datadir}/%{name}/imapdomo.lua
+%{_datadir}/%{name}/imaprules.lua
 %{_datadir}/%{name}/main.lua
 
 %changelog

src/imaprules.lua

+local pkg = {}
+
+pkg.STATE = {}
+
+pkg.SET = function(loader, ruleset)
+    pkg.STATE.loader = loader or function() return true end
+    pkg.STATE.ruleset = ruleset or {}
+    return true
+end
+
+pkg.RUN = function()
+    local i
+    for _, rule in ipairs(pkg.STATE.ruleset) do
+        i = rule.loader()
+        if not i then return end
+        rule.action(i)
+    end
+    pkg.SET()
+end
+
+pkg.ADD = function(action, loader)
+    local rule = {}
+    rule.action = action
+    rule.loader = loader or pkg.STATE.loader
+    table.insert(pkg.STATE, rule)
+end
+
+return pkg