Replace setup.py with pyproject.toml in the plugin template (#1638)

Continuing the war against its own users, setuptools finally managed to
break Limnoria.

More specifically, it now has "build isolation" by default, which means
that even if users have Limnoria installed,
`from supybot.setup import plugin_setup` fails unless there is a
pyproject.toml that contains:

```
[build-system]
requires = ['limnoria', 'setuptools']
```

and then even if we do that, Limnoria's `src/setup.py` crashes while
importing the plugin (to read its metadata and class name).

So instead, let's switch to pyproject.toml and hope this doesn't break
again in a couple of years.

Author: progval

src/scripts/limnoria_plugin_create.py

@@ -184,14 +184,30 @@ def configure(advanced):
 # vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:
 '''.lstrip()
 
-setupTemplate = '''
-%s
-
-from supybot.setup import plugin_setup
-
-plugin_setup(
-    %r,
-)
+pyprojectTemplate = '''
+[build-system]
+requires = ["setuptools"]
+
+[project]
+name = "limnoria-%(name_lowercase)s"
+version = "0.0.0"
+authors = [
+    { name = "%(author_name)s" }
+]
+readme = "README.md"
+dependencies = [
+    "limnoria",
+]
+
+[project.entry-points.'limnoria.plugins']
+%(name)s = "limnoria_%(name_lowercase)s"
+
+[tool.setuptools.package-dir]
+"limnoria_%(name_lowercase)s" = "."
+"limnoria_%(name_lowercase)s.local" = "local/"
+
+[tool.setuptools.package-data]
+"limnoria_%(name_lowercase)s" = ["locales/*.po"]
 '''.lstrip()
 
 testTemplate = '''
@@ -296,7 +312,12 @@ def writeFile(filename, s):
     writeFile('config.py', configTemplate % (copyright, name, name, name, name,
                                              name))
     writeFile('__init__.py', __init__Template % (copyright, name, options.desc))
-    writeFile('setup.py', setupTemplate % (copyright, name))
+    writeFile('pyproject.toml', pyprojectTemplate % {
+        'copyright': copyright,
+        'name': name,
+        'name_lowercase': name.lower(),
+        'author_name': realName.replace(r'"', r'\"'),  # good enough escape
+    })
     writeFile('test.py', testTemplate % (copyright, name, name))
     writeFile('README.md', readmeTemplate % (options.desc,))