Add gersemi to format CMake files (#265)

Co-authored-by: Tyler Veness <calcmogul@gmail.com>

wpiformat/pyproject.toml

@@ -7,7 +7,8 @@ dependencies = [
   "regex==2023.10.3",
   "black==23.9.1",
   "clang-format==17.0.5",
-  "clang-tidy==17.0.1"
+  "clang-tidy==17.0.1",
+  "gersemi==0.9.3"
 ]
 classifiers = [
   "Development Status :: 5 - Production/Stable",

wpiformat/wpiformat/__init__.py

@@ -11,6 +11,7 @@
 from wpiformat.cidentlist import CIdentList
 from wpiformat.clangformat import ClangFormat
 from wpiformat.clangtidy import ClangTidy
+from wpiformat.cmakeformat import CMakeFormat
 from wpiformat.config import Config
 from wpiformat.eofnewline import EofNewline
 from wpiformat.gtestname import GTestName
@@ -483,6 +484,7 @@ def main():
         task_pipeline = [
             BraceComment(),
             CIdentList(),
+            CMakeFormat(),
             EofNewline(),
             GTestName(),
             IncludeGuard(),

wpiformat/wpiformat/cmakeformat.py

@@ -0,0 +1,22 @@
+"""This task runs gersemi on CMake files."""
+
+import subprocess
+import sys
+
+from wpiformat.task import Task
+
+
+class CMakeFormat(Task):
+    @staticmethod
+    def should_process_file(config_file, name):
+        return name.endswith("CMakeLists.txt") or name.endswith(".cmake")
+
+    @staticmethod
+    def run_batch(config_file, names):
+        try:
+            args = [sys.executable, "-m", "gersemi", "-i"]
+            returncode = subprocess.run(args + names).returncode
+        except FileNotFoundError:
+            print("Error: gersemi not found in PATH. Is it installed?", file=sys.stderr)
+            return False
+        return True