refactor the build system to avoid generating .py[co] files in the source tree (which WAF doesn't like)

examples/foomodulegen.py

@@ -0,0 +1,36 @@
+#! /usr/bin/env python
+
+import sys
+
+from pybindgen import (ReturnValue, Parameter, Module, Function, FileCodeSink)
+from pybindgen import (CppMethod, CppConstructor, CppClass)
+
+    
+def my_module_gen(out_file):
+    print >> out_file, "#include <Python.h>"
+    print >> out_file, "#include \"foo.h\""
+
+    mod = Module('foo')
+
+    mod.add_function(Function(ReturnValue('int'), 'print_something',
+                              [Parameter('const char*', 'message')]))
+
+    mod.add_function(Function(ReturnValue('int'), 'print_something_else',
+                              [Parameter('const char*', 'message2')]))
+
+
+    SomeObject = CppClass('SomeObject')
+    SomeObject.add_method(CppMethod(ReturnValue('int'), 'add_prefix',
+                                    [Parameter('std::string&', 'message',
+                                               direction=Parameter.DIRECTION_INOUT)]))
+    SomeObject.add_constructor(
+        CppConstructor([Parameter('std::string', 'prefix')]))
+
+    mod.add_class(SomeObject)
+
+    mod.generate(FileCodeSink(out_file))
+
+
+if __name__ == '__main__':
+    my_module_gen(sys.stdout)
+

examples/wscript

@@ -4,73 +4,13 @@ import Object
 import Params
 import Task
 
-import os, sys
-sys.path.insert(0, os.getcwd()) # to work with uninstalled pybindgen
-
-from pybindgen import (ReturnValue, Parameter, Module, Function, FileCodeSink)
-from pybindgen import (CppMethod, CppConstructor, CppClass)
-
-
-def _pybindgen_action(task):
-    target, = task.m_outputs
-    out_file = file(target.bldpath(task.m_env), "w")
-    task.function(out_file)
-    out_file.close()
-
-class PyBindGen(Object.genobj):
-    def __init__(self, env=None):
-        Object.genobj.__init__(self, 'other')
-        self.install_var = 0
-        self.env = env
-        if not self.env:
-            self.env = Params.g_build.m_allenvs['default'].copy()
-        self.function = None
-        self.target = None
-        self.prio = 5
-    def apply(self):
-        function = self.function
-        task = self.create_task('pybindgen', self.env, self.prio)
-        task.function = self.function
-        target = self.path.find_build(self.target)
-        task.set_outputs([target])
-        task.set_inputs([self.path.find_source('wscript')])
-    def install(self):
-        pass
-
-
-    
-def my_module_gen(out_file):
-    print >> out_file, "#include <Python.h>"
-    print >> out_file, "#include \"foo.h\""
-
-    mod = Module('foo')
-
-    mod.add_function(Function(ReturnValue('int'), 'print_something',
-                              [Parameter('const char*', 'message')]))
-
-    mod.add_function(Function(ReturnValue('int'), 'print_something_else',
-                              [Parameter('const char*', 'message2')]))
-
-
-    SomeObject = CppClass('SomeObject')
-    SomeObject.add_method(CppMethod(ReturnValue('int'), 'add_prefix',
-                                    [Parameter('std::string&', 'message')]))
-    SomeObject.add_constructor(
-        CppConstructor([Parameter('std::string', 'prefix')]))
-
-    mod.add_class(SomeObject)
-
-    mod.generate(FileCodeSink(out_file))
-
 
 def build(bld):
-    Object.register('pybindgen', PyBindGen)
-    Action.Action('pybindgen', func=_pybindgen_action, color='BLUE')
-
-    bindgen = bld.create_obj('pybindgen')
-    bindgen.target = 'foomodule.cc'
-    bindgen.function = my_module_gen
-    bindgen.prio = 1
+    bindgen = bld.create_obj('command-output')
+    bindgen.stdout = 'foomodule.cc'
+    bindgen.stdin = 'foomodulegen.py'
+    bindgen.command = 'foomodulegen.py'
+    bindgen.prio = 3 # must run after the 'py' objects in ../pybindgen
 
     obj = bld.create_obj('cpp', 'shlib', 'pyext')
     obj.source = [

pybindgen/wscript

@@ -7,8 +7,10 @@ def build(bld):
     # commented, triggers a WAF bug (Issue #40)
     #obj.source.append('version.py')
     obj.inst_dir = 'pybindgen'
+    obj.prio = 2
 
     obj = bld.create_obj('py')
     obj.find_sources_in_dirs('typehandlers')
     obj.inst_dir = 'pybindgen/typehandlers'
+    obj.prio = 2
 

tests/test-generation.py

@@ -2,11 +2,6 @@
 
 import sys
 
-try:
-    path = sys.argv[1]
-except IndexError:
-    path = '..'
-sys.path.insert(0, path)
 
 from pybindgen import typehandlers
 from pybindgen.typehandlers import codesink

tests/wscript

@@ -13,18 +13,16 @@ def build(bld):
     gen.stdin = 'test-generation.py'
     top_srcdir = bld.m_srcnode.abspath()
     gen.argv = [top_srcdir]
-    gen.priority = 5
+    gen.prio = 5
     
     obj = bld.create_obj('cpp', 'objects', 'pyext')
     obj.source = 'test.cc'
     obj.env.append_value('CXXFLAGS', ['-Wall', '-Werror', '-Wno-unused'])
 
     cwd = os.getcwd()
-    env = dict(os.environ)
-    env['PYTHONPATH'] = top_srcdir
     os.chdir(top_srcdir)
     try:
-        if subprocess.Popen(['python', 'tests/test.py'], env=env).wait():
+        if subprocess.Popen(['python', 'tests/test.py']).wait():
             raise SystemExit(1)
     finally:
         os.chdir(cwd)

wscript

@@ -8,6 +8,10 @@ import os
 import pproc as subprocess
 import shutil
 
+
+os.environ['PYTHONPATH'] = os.path.join(os.getcwd(), 'build', 'default')
+
+
 def get_version_from_bzr():
     import bzrlib.tag, bzrlib.branch
     branch = bzrlib.branch.Branch.open('file://' + os.getcwd())