Add internal type for release notes

newsfragments/README.md

@@ -12,6 +12,7 @@ Each file should be named like `<ISSUE>.<TYPE>.rst`, where
 * `bugfix`
 * `performance`
 * `doc`
+* `internal`
 * `removal`
 * `misc`
 
@@ -23,4 +24,4 @@ then open up the PR first and use the PR number for the newsfragment.
 Note that the `towncrier` tool will automatically
 reflow your text, so don't try to do any fancy formatting. Run
  `towncrier --draft` to get a preview of what the release notes entry
- will look like in the final release notes.
+ will look like in the final release notes.

newsfragments/validate_files.py

@@ -5,11 +5,13 @@
 
 import os
 import pathlib
+import sys
 
 ALLOWED_EXTENSIONS = {
     '.bugfix.rst',
     '.doc.rst',
     '.feature.rst',
+    '.internal.rst',
     '.misc.rst',
     '.performance.rst',
     '.removal.rst',
@@ -22,11 +24,20 @@ ALLOWED_FILES = {
 
 THIS_DIR = pathlib.Path(__file__).parent
 
+num_args = len(sys.argv) - 1
+assert num_args in {0, 1}
+if num_args == 1:
+    assert sys.argv[1] in ('is-empty', )
+
 for fragment_file in THIS_DIR.iterdir():
 
     if fragment_file.name in ALLOWED_FILES:
         continue
-
-    full_extension = "".join(fragment_file.suffixes)
-    if full_extension not in ALLOWED_EXTENSIONS:
+    elif num_args == 0:
+        full_extension = "".join(fragment_file.suffixes)
+        if full_extension not in ALLOWED_EXTENSIONS:
+            raise Exception(f"Unexpected file: {fragment_file}")
+    elif sys.argv[1] == 'is-empty':
         raise Exception(f"Unexpected file: {fragment_file}")
+    else:
+        raise RuntimeError("Strange: arguments {sys.argv} were validated, but not found")

pyproject.toml

@@ -6,8 +6,6 @@ directory = "newsfragments"
 underlines = ["-", "~", "^"]
 issue_format = "`#{issue} <https://github.com/ethereum/<REPO_NAME>/issues/{issue}>`__"
 
-# Configure all default sections plus an extra one for performance improvements.
-
 [[tool.towncrier.type]]
 directory = "feature"
 name = "Features"
@@ -33,7 +31,12 @@ directory = "removal"
 name = "Deprecations and Removals"
 showcontent = true
 
+[[tool.towncrier.type]]
+directory = "internal"
+name = "Internal Changes - for <PROJECT_NAME> Contributors"
+showcontent = true
+
 [[tool.towncrier.type]]
 directory = "misc"
-name = "Miscellaneous internal changes"
-showcontent = false
+name = "Miscellaneous changes"
+showcontent = false