Define pg_activity script as an entry point

We move pg_activity script as pgactivity/cli.py and transform the
__main__ section as a main() function. Then the 'script' keyword in
setup() is changed into an 'entry_points'+'console_scripts'; this is the
recommended way of shipping script and should fix the wrong shebang on
some systems.

Author: dlax

Diff for: pg_activity renamed to pgactivity/cli.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python3
-
 import os
 import socket
 import sys
@@ -10,7 +8,7 @@
 from blessed import Terminal
 from psycopg2.errors import OperationalError
 
-from pgactivity import __version__, data, types, ui
+from . import __version__, data, types, ui
 
 
 # Customized OptionParser
@@ -255,8 +253,7 @@ def exit(msg: str) -> None:
     sys.exit(1)
 
 
-# Call the main function
-if __name__ == "__main__":
+def main() -> None:
     if os.name != "posix":
         sys.exit("FATAL: Platform not supported.")
     try:

Diff for: pyproject.toml

@@ -1,6 +1,6 @@
 [tool.black]
 line-length = 88
-include = '/(pg_activity|\.pyi?)$'
+include = '\.pyi?$'
 exclude = '''
 (
   /(

Diff for: setup.py

@@ -29,7 +29,6 @@ def get_version() -> str:
     version=get_version(),
     author="Dalibo",
     author_email="[email protected]",
-    scripts=["pg_activity"],
     packages=find_packages("."),
     include_package_data=True,
     url="https://github.com/dalibo/pg_activity",
@@ -61,4 +60,9 @@ def get_version() -> str:
         ],
     },
     data_files=data_files,
+    entry_points={
+        "console_scripts": [
+            "pg_activity=pgactivity.cli:main",
+        ],
+    },
 )

Diff for: tox.ini

@@ -26,10 +26,10 @@ deps =
     flake8
 commands =
     black --check --diff {toxinidir}
-    flake8 {toxinidir} {toxinidir}/pg_activity
+    flake8 {toxinidir}
 
 [testenv:mypy]
 deps =
     mypy
 commands =
-    mypy pg_activity pgactivity
+    mypy pgactivity