Add pre-commit scripts for file formatting

.github/workflows/file_format.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import sys
+
+if len(sys.argv) < 2:
+	print("Invalid usage of file_format.py, it should be called with a path to one or multiple files.")
+	sys.exit(1)
+
+BOM = b"\xef\xbb\xbf"
+
+changed = []
+invalid = []
+
+for file in sys.argv[1:]:
+	try:
+		with open(file, "rt", encoding="utf-8") as f:
+			original = f.read()
+	except UnicodeDecodeError:
+		invalid.append(file)
+		continue
+
+	if original == "":
+		continue
+
+	EOL = "\n"
+	revamp = EOL.join([line.rstrip("\n\r\t ") for line in original.splitlines(True)]).rstrip(EOL) + EOL
+
+	new_raw = revamp.encode(encoding="utf-8")
+	if new_raw.startswith(BOM):
+		new_raw = new_raw[len(BOM) :]
+
+	with open(file, "rb") as f:
+		old_raw = f.read()
+
+	if old_raw != new_raw:
+		changed.append(file)
+		with open(file, "wb") as f:
+			f.write(new_raw)
+
+if changed:
+	for file in changed:
+		print(f"FIXED: {file}")
+
+if invalid:
+	for file in invalid:
+		print(f"REQUIRES MANUAL CHANGES: {file}")
+	sys.exit(1)

.github/workflows/static_checks.yml

@@ -0,0 +1,33 @@
+name: 📊 Static Checks
+on: [push, pull_request]
+
+concurrency:
+  group: ci-${{ github.actor }}-${{ github.head_ref || github.run_number }}-${{ github.ref }}-static
+
+jobs:
+  static-checks:
+    name: Code style and file formatting
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Install APT dependencies
+        uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: libxml2-utils
+
+      - name: Install Python dependencies and general setup
+        run: |
+          git config diff.wsErrorHighlight all
+
+      - name: Style checks via pre-commit
+        uses: pre-commit/action@v3.0.1
+        with:
+          extra_args: --all-files
+
+      - name: XML validation via xmllint
+        run: |
+          xmllint --noout warehouse.doap data/io.github.flattool.Warehouse.gschema.xml data/io.github.flattool.Warehouse.metainfo.xml.in src/warehouse.gresource.xml