[build] Build shared lib in site-packages

setup.py

@@ -13,17 +13,23 @@ SRC_DIR = 'src'
 this_dir = os.path.realpath(os.path.dirname(__file__))
 
 virtualenv_path = os.environ.get('VIRTUAL_ENV')
+site_packages_dir = None
 if virtualenv_path:
     virtualenv_path = os.path.abspath(virtualenv_path)
+    site_packages_dirs = [d for d in sys.path if d.startswith(virtualenv_path) and d.rstrip(os.sep).endswith('site-packages')]
+    if site_packages_dirs:
+        site_packages_dir = site_packages_dirs[0]
 
 
-def build_dependencies(data_dir=None, prefix=None):
+def build_dependencies(data_dir=None, prefix=None, lib_dir=None):
     subprocess.check_call(['sh', os.path.join(this_dir, 'bootstrap.sh')])
     configure_command = ['sh', os.path.join(this_dir, 'configure')]
     if data_dir:
         configure_command.append('--datadir={}'.format(data_dir))
     if prefix:
         configure_command.append('--prefix={}'.format(prefix))
+    if lib_dir:
+        configure_command.append('--libdir={}'.format(lib_dir))
     subprocess.check_call(configure_command)
     subprocess.check_call(['make', 'install'])
 
@@ -46,6 +52,7 @@ class InstallWithDependencies(install):
     user_options = install.user_options + [
         ('datadir=', None, 'Data directory for libpostal models'),
         ('prefix=', None, 'Install prefix for libpostal'),
+        ('libdir=', None, 'lib directory for libpostal')
     ]
 
     def initialize_options(self):
@@ -57,7 +64,7 @@ class InstallWithDependencies(install):
         self.prefix = get_prefix_path(self.prefix)
 
         if self.prefix is not None and not os.path.exists(self.prefix):
-                os.mkdir(self.prefix)
+            os.mkdir(self.prefix)
 
         if self.datadir is None and self.prefix:
             self.datadir = os.path.join(self.prefix, 'data')
@@ -66,10 +73,14 @@ class InstallWithDependencies(install):
             self.datadir = normalized_path(self.datadir)
             if not os.path.exists(self.datadir):
                 os.mkdir(self.datadir)
+
+        if self.libdir is None and site_packages_dir is not None:
+            self.libdir = site_packages_dir
+
         install.finalize_options(self)
 
     def run(self):
-        build_dependencies(self.datadir, prefix=self.prefix)
+        build_dependencies(self.datadir, prefix=self.prefix, lib_dir=self.libdir)
         install.run(self)