Initial version of syntax regression tests

tests/syntax-tests/create_highlighted_versions.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+
+import subprocess
+import glob
+import sys
+import os.path as path
+import os
+
+
+BAT_OPTIONS = [
+    "--no-config",
+    "--style=plain",
+    "--color=always",
+    "--theme='1337'",
+    "--italic-text=always",
+]
+
+
+def create_highlighted_versions():
+    root = os.path.dirname(os.path.abspath(__file__))
+
+    for source in glob.glob(path.join(root, "source", "*", "*")):
+        try:
+            bat_output = subprocess.check_output(
+                ["bat"] + BAT_OPTIONS + [source], stderr=subprocess.PIPE,
+            )
+
+            source_dirname = path.basename(path.dirname(source))
+            source_filename = path.basename(source)
+
+            output_dir = path.join(root, "highlighted", source_dirname)
+            output_path = path.join(output_dir, source_filename)
+
+            os.makedirs(output_dir, exist_ok=True)
+
+            with open(output_path, "wb") as output_file:
+                output_file.write(bat_output)
+
+            relative_path = path.relpath(output_path, root)
+            print("Created '{}'".format(relative_path))
+        except subprocess.CalledProcessError as err:
+            print(
+                "=== Error: Could not highlight source file '{}".format(source),
+                file=sys.stderr,
+            )
+            print(
+                "=== bat stdout:\n{}".format(err.stdout.decode("utf-8")),
+                file=sys.stderr,
+            )
+            print(
+                "=== bat stderr:\n{}".format(err.stderr.decode("utf-8")),
+                file=sys.stderr,
+            )
+            sys.exit(1)
+
+
+if __name__ == "__main__":
+    create_highlighted_versions()