Allow custom section types to play in <product-config>.

doc/CHANGES.txt

@@ -28,9 +28,10 @@ Zope Changes
 
       - Added a 'product-config' section type to zope.conf, allowing
         arbitrary key-value mappings.  Products can look for such
-        confgiurations to set product-specific options (see the
-        example '<product-config>' section in skel/etc/zope.conf.in
-        for sample usage).
+        confgiurations to set product-specific options.  Products mwy
+        also register their own section types, extending the
+        'zope.product.base' type. (see the example '<product-config>'
+        section in skel/etc/zope.conf.in for sample usage).
 
       - Collector #1490: Added a new zope.conf option to control the
         character set used to encode unicode data that reaches

lib/python/Zope2/Startup/datatypes.py

@@ -113,6 +113,7 @@ def python_dotted_path(name):
 
 def root_config(section):
     from ZConfig import ConfigurationError
+    from ZConfig.matcher import SectionValue
     here = os.path.dirname(os.path.abspath(__file__))
     swhome = os.path.dirname(os.path.dirname(here))
     section.softwarehome = swhome
@@ -152,7 +153,15 @@ def root_config(section):
 
     pconfigs = {}
     for pconfig in section.product_config:
-        pconfigs[pconfig.getSectionName()] = pconfig.mapping
+        section_name = pconfig.getSectionName()
+        if isinstance(pconfig, SectionValue):
+            section_type = pconfig.getSectionType()
+            if section_type == 'product-config':
+                pconfigs[section_name] = pconfig.mapping
+            else:
+                pconfigs[section_name] = pconfig
+        else:
+            pconfigs[section_name] = pconfig
 
     section.product_config = pconfigs
 
@@ -227,6 +236,3 @@ def default_zpublisher_encoding(value):
     Converters.default_encoding = value
     HTTPRequest.default_encoding = value
     HTTPResponse.default_encoding = value
-
-class ProductConfig(dict):
-    pass

lib/python/Zope2/Startup/zopeschema.xml

@@ -821,7 +821,18 @@
      <metadefault>iso-8859-15</metadefault>
   </key>
 
-  <sectiontype name="product-config">
+  <abstracttype name="zope.product.base">
+    <description>
+      Base type for product-specific configuration sections.
+
+      Specific products should implement configuration sections by
+      defining section types that implement this abstract type and
+      using their own schema component to define meaningful settings.
+
+    </description>
+  </abstracttype>
+
+  <sectiontype name="product-config" implements="zope.product.base">
     <description>
     Product-specific configuration, expressed as arbitrary name-value pairs.
     </description>
@@ -832,12 +843,17 @@
          />
   </sectiontype>
 
-  <multisection type="product-config" name="+"
+  <multisection type="zope.product.base" name="+"
                 attribute="product_config">
    <description>
-    Product-specific configuration, expressed as arbitrary name-value pairs.
+    Product-specific configuration stanzas.
+
+    Products may use the &lt;product-config&gt; section type, or may supply
+    a component.xml which defines section types with their own schemas.
+
+    All sections for this multisection will be collected into the
+    'product_config' attribute of the configuration object.
    </description>
   </multisection>
 
-
 </schema>

skel/etc/zope.conf.in

@@ -983,8 +983,37 @@ instancehome $INSTANCE
 #    parsed into a dict, {'bar': 'baz'}, available as
 #    config.product_config['foo']
 #
+#    Products may also register their own section types, extending
+#    
+#
 # Example: 
 #
+# 1. Simple "bag of strings" section:
+#
 #    <product-config foo>
 #       bar baz
 #    </product-config>
+#
+# 2. Custom section type
+#
+#    Products/Foo/component.xml:
+#
+#    <component>
+#     <description>
+#       Some product-specific hackery.
+#     </description>
+#     <sectiontype name="myproduct" implements="zope.product.base">
+#      <description>
+#       Product-specific configuration.
+#      </description>
+#      <key name="foo" />
+#     </sectiontype>
+#    </component>
+#
+#    In zope.conf:
+#
+#    %import Products.Foo
+#
+#    <myproduct bar>
+#      foo qux
+#    </myproduct>