adapt cmake command to platform

(code contributed by Miro Ilias)

.travis.yml

@@ -7,3 +7,4 @@ script:
   - pep8 --ignore=E501 test/test.py
   - pep8 --ignore=E501 lib/config.py
   - py.test -vv test/test.py
+  - py.test -vv lib/config.py

lib/config.py

@@ -44,6 +44,34 @@ def setup_build_path(build_path):
         os.makedirs(build_path, 0o755)
 
 
+def test_adapt_cmake_command_to_platform():
+
+    cmake_command = "FC=foo CC=bar CXX=RABOOF cmake -DTHIS -DTHAT='this and that cmake' .."
+    res = adapt_cmake_command_to_platform(cmake_command, 'linux')
+    assert res == cmake_command
+    res = adapt_cmake_command_to_platform(cmake_command, 'win32')
+    assert res == "set FC=foo && set CC=bar && set CXX=RABOOF && cmake -DTHIS -DTHAT='this and that cmake' .."
+
+    cmake_command = "cmake -DTHIS -DTHAT='this and that cmake' .."
+    res = adapt_cmake_command_to_platform(cmake_command, 'linux')
+    assert res == cmake_command
+    res = adapt_cmake_command_to_platform(cmake_command, 'win32')
+    assert res == cmake_command
+
+
+def adapt_cmake_command_to_platform(cmake_command, platform):
+    """
+    Adapt CMake command to MS Windows platform.
+    """
+    if platform == 'win32':
+        pos = cmake_command.find('cmake')
+        s = ['set %s &&' % e for e in cmake_command[:pos].split()]
+        s.append(cmake_command[pos:])
+        return ' '.join(s)
+    else:
+        return cmake_command
+
+
 def run_cmake(command, build_path, default_build_path):
     """
     Execute CMake command.
@@ -113,6 +141,8 @@ def configure(root_directory, build_path, cmake_command, only_show):
     if not only_show:
         setup_build_path(build_path)
 
+    cmake_command = adapt_cmake_command_to_platform(cmake_command, sys.platform)
+
     print('%s\n' % cmake_command)
     if only_show:
         sys.exit(0)