Merge branch 'build_dir'

Cython/Build/Dependencies.py

@@ -640,6 +640,7 @@ def cythonize(module_list, exclude=[], nthreads=0, aliases=None, quiet=False, fo
     c_options = CompilationOptions(**options)
     cpp_options = CompilationOptions(**options); cpp_options.cplus = True
     ctx = c_options.create_context()
+    options = c_options
     module_list = create_extension_list(
         module_list,
         exclude=exclude,
@@ -651,6 +652,18 @@ def cythonize(module_list, exclude=[], nthreads=0, aliases=None, quiet=False, fo
     modules_by_cfile = {}
     to_compile = []
     for m in module_list:
+        if hasattr(options, 'build_dir'):
+            root = os.path.realpath(os.path.abspath(m.name.split('.')[0]))
+            def copy_to_build_dir(file):
+                if os.path.realpath(os.path.abspath(file)).startswith(root):
+                    dir = os.path.join(options.build_dir,
+                            os.path.dirname(os.path.relpath(file)))
+                    if not os.path.isdir(dir):
+                        os.makedirs(dir)
+                    shutil.copy(file, dir)
+            for dep in m.depends:
+                copy_to_build_dir(dep)
+
         new_sources = []
         for source in m.sources:
             base, ext = os.path.splitext(source)
@@ -661,6 +674,14 @@ def cythonize(module_list, exclude=[], nthreads=0, aliases=None, quiet=False, fo
                 else:
                     c_file = base + '.c'
                     options = c_options
+
+                # setup for out of place build directory if enabled
+                if hasattr(options, 'build_dir'):
+                    c_file = os.path.join(options.build_dir, c_file)
+                    dir = os.path.dirname(c_file)
+                    if not os.path.isdir(dir):
+                        os.makedirs(dir)
+
                 if os.path.exists(c_file):
                     c_timestamp = os.path.getmtime(c_file)
                 else:
@@ -694,6 +715,8 @@ def cythonize(module_list, exclude=[], nthreads=0, aliases=None, quiet=False, fo
                     modules_by_cfile[c_file].append(m)
             else:
                 new_sources.append(source)
+                if hasattr(options, 'build_dir'):
+                    copy_to_build_dir(source)
         m.sources = new_sources
     if hasattr(options, 'cache'):
         if not os.path.exists(options.cache):

tests/build/build_dir.srctree

+PYTHON setup.py build_ext --inplace
+PYTHON -c "import a"
+ls -R
+
+if [ -f "a.c" ]; then
+    echo "C output in local directory."
+    exit 1
+fi
+
+if [ ! -f "scratch/a.c" ]; then
+    echo "Missing C output in scratch."
+    exit 1
+fi
+
+######## setup.py ########
+
+
+# TODO: Better interface...
+from Cython.Build.Dependencies import cythonize
+
+from distutils.core import setup
+
+setup(
+  ext_modules = cythonize("*.pyx", build_dir="scratch"),
+)
+
+######## a.pyx ########
+
+cdef extern from "a_helper.h":
+    int value
+    
+assert value == 100
+
+######## a_helper.h ########
+
+int value = 100;
\ No newline at end of file