ENH: create __config__.py file.

bscript

@@ -1,4 +1,5 @@
 import sys
+import os.path as op
 
 from numpy.distutils.misc_util \
     import \
@@ -11,6 +12,9 @@ from bento.commands import hooks
 from bento.commands.extras.waf \
     import \
         ConfigureWafContext, BuildWafContext, register_options
+from bento.installed_package_description \
+    import \
+        InstalledSection
 
 import waflib
 from waflib import Options
@@ -110,3 +114,47 @@ def post_configure(context):
         conf.env["MACOSX_DEPLOYMENT_TARGET"] = "10.4"
 
         conf.env.MACOSX_DEPLOYMENT_TARGET = "10.4"
+
+# FIXME: abstract those module gen tasks...
+class write_module(waflib.Task.Task):
+    color = "CYAN"
+    vars = ["CONTENT"]
+    def run(self):
+        # FIXME: put actual data here
+        self.outputs[0].write(self.env.CONTENT)
+
+@waflib.TaskGen.feature("gen_pymodule")
+def process_write_config(self):
+    if not hasattr(self, "content"):
+        raise ValueError("task gen %r expects a 'content' argument" % self.name)
+    else:
+        self.env.CONTENT = self.content
+    output = self.path.find_or_declare(self.target)
+    name = getattr(self, "name", None) or self.target
+
+    bento_context = self.bld.bento_context
+    b_output = bento_context.build_node.make_node(output.bldpath())
+    bento_context.outputs_registry.register_outputs(
+        "gen_pymodule", name, [b_output], bento_context.build_node, "$sitedir")
+
+    tsk = self.create_task("write_module")
+    tsk.set_outputs(output)
+    return tsk
+
+@hooks.pre_build()
+def pre_build(context):
+    bld = context.waf_context
+
+    def iregistrer(category, name, nodes, from_node, target_dir):
+        source_dir = op.join("$_srcrootdir", from_node.bldpath())
+        files = [n.path_from(from_node) for n in nodes]
+        return InstalledSection.from_source_target_directories(category, name, source_dir, target_dir, files)
+    context.isection_registry.register_category("gen_pymodule", iregistrer)
+    context.outputs_registry.register_category("gen_pymodule", "pythonfiles")
+    bld(features="gen_pymodule",
+        target="scipy/__config__.py",
+        content="""\
+def show():
+    pass
+""",
+        always=True)