openwsman: fix detect python executable (#20317)

* openwsman: fix detect python executable

- use spack's python insted of system's python
- Add variant to use python.
- fix dependency.
- support python2.

* format fixed.

* fix python command.

var/spack/repos/builtin/packages/openwsman/package.py

@@ -16,10 +16,66 @@ class Openwsman(CMakePackage):
     version('2.6.11', sha256='895eaaae62925f9416766ea3e71a5368210e6cfe13b23e4e0422fa0e75c2541c')
     version('2.6.10', sha256='d3c624a03d7bc1835544ce1af56efd010f77cbee0c02b34e0755aa9c9b2c317b')
 
-    depends_on('python@3:', type='build')
-    depends_on('curl')
-    depends_on('libxml2')
-    depends_on('sblim-sfcc')
+    variant('python', default=True, description='Enable python')
+
+    extends('python', when='+python')
+
+    depends_on('python', type=('build', 'link', 'run'))
+    depends_on('curl', type='link')
+    depends_on('swig', type='build')
+    depends_on('libxml2', type='link')
+    depends_on('openssl', type='link')
+    depends_on('sblim-sfcc', type='link')
+
+    def patch(self):
+        """ Change python install directory. """
+        if self.spec.satisfies('+python'):
+            python_spec = self.spec['python']
+            python_libdir = join_path(
+                self.spec.prefix.lib,
+                'python' + str(python_spec.version.up_to(2)),
+                'site-packages'
+            )
+            filter_file(
+                'DESTINATION .*',
+                'DESTINATION {0} )'.format(python_libdir),
+                join_path('bindings', 'python', 'CMakeLists.txt')
+            )
 
     def cmake_args(self):
-        return ['-DBUILD_PYTHON=OFF', '-DUSE_PAM=NO']
+        define = self.define
+        spec = self.spec
+        arg = [
+            define('BUILD_PERL', False),
+            define('BUILD_JAVA', False),
+            define('BUILD_CSHARP', False),
+            define('USE_PAM', 'OFF'),
+        ]
+        if spec.satisfies('+python'):
+            if spec.satisfies('^python@3:'):
+                arg.extend([
+                    define('BUILD_PYTHON', False),
+                    define('BUILD_PYTHON3', True)
+                ])
+            else:
+                arg.extend([
+                    define('BUILD_PYTHON', True),
+                    define('BUILD_PYTHON3', False)
+                ])
+            arg.append(define('PYTHON_EXECUTABLE',
+                       spec['python'].command.path))
+        else:
+            arg.extend([
+                define('BUILD_PYTHON', False),
+                define('BUILD_PYTHON3', False)
+            ])
+        return arg
+
+    def flag_handler(self, name, flags):
+        flags = list(flags)
+        if name == 'cflags':
+            if self.spec.satisfies('%gcc'):
+                flags.append('-std=gnu99')
+            else:
+                flags.append(self.compiler.c99_flag)
+        return (None, None, flags)