FIX: pdoc cli ignoring virtual environment

fixes: pdoc3#44

Author: jlaufersweiler

pdoc/cli.py

@@ -299,6 +299,26 @@ def main(_args=None):
     # Support loading modules specified as python paths relative to cwd
     sys.path.append(os.getcwd())
 
+    # Virtual Environment Handling for system pdoc cli
+    try:
+        # this will raise a KeyError if not in a virtual envitonment.
+        venvPath = os.environ['VIRTUAL_ENV']
+        # pdoc is installed in the current v.e., it will find v.e. local modules.
+        if path.isdir(path.join(venvPath,
+                                'lib',
+                                'site-packages',
+                                'pdoc')):
+
+            pass
+        else:
+            # pdoc cli is running with system Python context despite being invoked in a v.e.
+            sys.path.append(path.join(venvPath,
+                                      'lib',
+                                      'site-packages'))
+    except KeyError:
+        # pdoc cli was not invoked in a virtual environment
+        pass
+
     if args.http:
         args.html = True
         args.external_links = True