Enforce order for elements in unordered data structures (#33)

* Lint for order of set/dict elements

* Fix linting order

There isn't a great way to make these come in the order that would be
logical to humans. Given that this is how these will also be presented
at https://pypi.org/classifiers/, we should sort them the same as they
are there until we find a better way to order these.

Author: di

Makefile

@@ -16,6 +16,7 @@ test: .state/env/pyvenv.cfg
 
 lint: .state/env/pyvenv.cfg
 	$(BINDIR)/black --check tests trove_classifiers
+	$(BINDIR)/python bin/sort.py trove_classifiers/__init__.py
 
 reformat: .state/env/pyvenv.cfg
 	$(BINDIR)/black tests trove_classifiers

bin/sort.py

@@ -0,0 +1,31 @@
+import ast
+
+import sys
+
+
+def _test_sort(elements, _type):
+    values = [e.value for e in elements]
+    for wrong, right in zip(values, sorted(values)):
+        if wrong != right:
+            print(f"{_type} is not sorted, {right!r} should come before {wrong!r}")
+            return True
+    return False
+
+
+if len(sys.argv) == 1:
+    print("Usage: ssort.py [filename]")
+    sys.exit(1)
+
+
+with open(sys.argv[1]) as f:
+    contents = f.read()
+
+fail = False
+
+for node in ast.walk(ast.parse(contents)):
+    if type(node) == ast.Set:
+        fail = _test_sort(node.elts, "Set") or fail
+    if type(node) == ast.Dict:
+        fail = _test_sort(node.keys, "Dict") or fail
+
+sys.exit(fail)

trove_classifiers/__init__.py

@@ -16,6 +16,9 @@
     "Environment :: GPU :: NVIDIA CUDA",
     "Environment :: GPU :: NVIDIA CUDA :: 1.0",
     "Environment :: GPU :: NVIDIA CUDA :: 1.1",
+    "Environment :: GPU :: NVIDIA CUDA :: 10.0",
+    "Environment :: GPU :: NVIDIA CUDA :: 10.1",
+    "Environment :: GPU :: NVIDIA CUDA :: 10.2",
     "Environment :: GPU :: NVIDIA CUDA :: 2.0",
     "Environment :: GPU :: NVIDIA CUDA :: 2.1",
     "Environment :: GPU :: NVIDIA CUDA :: 2.2",
@@ -36,9 +39,6 @@
     "Environment :: GPU :: NVIDIA CUDA :: 9.0",
     "Environment :: GPU :: NVIDIA CUDA :: 9.1",
     "Environment :: GPU :: NVIDIA CUDA :: 9.2",
-    "Environment :: GPU :: NVIDIA CUDA :: 10.0",
-    "Environment :: GPU :: NVIDIA CUDA :: 10.1",
-    "Environment :: GPU :: NVIDIA CUDA :: 10.2",
     "Environment :: Handhelds/PDA's",
     "Environment :: MacOS X",
     "Environment :: MacOS X :: Aqua",