Add script and VSCode task for creating change notes

.vscode/tasks.json

@@ -38,6 +38,58 @@
                 "command": "${config:python.pythonPath}",
             },
             "problemMatcher": []
+        },
+        {
+            "label": "Create change note",
+            "type": "process",
+            "command": "python3",
+            "args": [
+                "misc/scripts/create-change-note.py",
+                "${input:language}",
+                "${input:name}",
+                "${input:category}"
+            ],
+            "presentation": {
+                "reveal": "never",
+                "close": true
+            },
+            "problemMatcher": []
+        }
+    ],
+    "inputs": [
+        {
+            "type": "pickString",
+            "id": "language",
+            "description": "Language",
+            "options":
+            [
+                "go",
+                "java",
+                "javascript",
+                "cpp",
+                "csharp",
+                "python",
+                "ruby",
+                "swift",
+            ]
+        },
+        {
+            "type": "promptString",
+            "id": "name",
+            "description": "Name"
+        },
+        {
+            "type": "pickString",
+            "id": "category",
+            "description": "Category",
+            "options":
+            [
+                "minorAnalysis",
+                "newQuery",
+                "fix",
+                "majorAnalysis",
+                "breaking",
+            ]
         }
     ]
 }

misc/scripts/create-change-note.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+# Creates a change note and opens it in VSCode for editing.
+
+# Expects to receive the following arguments:
+# - What language the change note is for
+# - The name of the change note (in kebab-case)
+# - The category of the change.
+
+# The change note will be created in the `{language}/ql/lib/change-notes` directory.
+
+# The format of the change note filename is `{current_date}-{change_note_name}.md` with the date in
+# the format `YYYY-MM-DD`.
+
+import sys
+import os
+
+# Read the given arguments
+language = sys.argv[1]
+change_note_name = sys.argv[2]
+change_category = sys.argv[3]
+
+# Find the root of the repository. The current script should be located in `misc/scripts`.
+root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+# Go to the repo root
+os.chdir(root)
+
+# Abort if the output directory doesn't exist
+if not os.path.exists(f"{language}/ql/lib/change-notes"):
+    print(f"Output directory {language}/ql/lib/change-notes does not exist")
+    sys.exit(1)
+
+# Get the current date
+import datetime
+current_date = datetime.datetime.now().strftime("%Y-%m-%d")
+
+# Create the change note file
+change_note_file = f"{language}/ql/lib/change-notes/{current_date}-{change_note_name}.md"
+
+change_note = f"""
+---
+category: {change_category}
+---
+* """.lstrip()
+
+with open(change_note_file, "w") as f:
+    f.write(change_note)
+
+# Open the change note file in VSCode, reusing the existing window if possible
+os.system(f"code -r {change_note_file}")