remove obsolete use of pkg_resource (#12)

Author: arenevier

setup.py

@@ -49,7 +49,7 @@ def get_version():
     packages=find_packages('src'),
     package_dir={'': 'src'},
     include_package_data=True,
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     install_requires=[
         'setuptools',
         'funcparserlib>=1.0.0a0',

src/blockdiag/imagedraw/__init__.py

@@ -13,22 +13,22 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-import pkg_resources
+from importlib import metadata
 
 from blockdiag.utils.logging import warning
 
 drawers = {}
 
 
 def init_imagedrawers(debug=False):
-    for drawer in pkg_resources.iter_entry_points('blockdiag_imagedrawers'):
+    for drawer in metadata.entry_points(group='blockdiag_imagedrawers'):
         try:
             module = drawer.load()
             if hasattr(module, 'setup'):
                 module.setup(module)
         except Exception as exc:
             if debug:
-                warning('Failed to load %s: %r' % (drawer.module_name, exc))
+                warning('Failed to load %s: %r' % (drawer.name, exc))
 
 
 def install_imagedrawer(ext, drawer):

src/blockdiag/noderenderer/__init__.py

@@ -15,14 +15,14 @@
 
 from __future__ import division
 
-import pkg_resources
+from importlib import metadata
 
 renderers = {}
 searchpath = []
 
 
 def init_renderers():
-    for plugin in pkg_resources.iter_entry_points('blockdiag_noderenderer'):
+    for plugin in metadata.entry_points(group='blockdiag_noderenderer'):
         module = plugin.load()
         if hasattr(module, 'setup'):
             module.setup(module)

src/blockdiag/plugins/__init__.py

@@ -13,7 +13,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-from pkg_resources import iter_entry_points
+from importlib import metadata
 
 from blockdiag.utils.logging import warning
 
@@ -28,7 +28,7 @@ def load(plugins, diagram, **kwargs):
             warning('plugin "%s" is already loaded. ignored.', name)
             return
 
-        for ep in iter_entry_points('blockdiag_plugins', name):
+        for ep in metadata.entry_points(group='blockdiag_plugins', name=name):
             module = ep.load()
             loaded_plugins.append(name)
             if hasattr(module, 'setup'):