Add contrib/reformat-code.py to pre-commit hooks

.pre-commit-config.yaml

@@ -48,6 +48,10 @@ repos:
       language: system
       entry: shellcheck --severity=error -e SC2068
       types: [shell]
+    - id: clang-format
+      name: clang-format
+      language: script
+      entry: ./contrib/reformat-code.py
 -   repo: https://github.com/igorshubovych/markdownlint-cli
     rev: v0.27.1
     hooks:

contrib/reformat-code.py

@@ -5,29 +5,15 @@
 # SPDX-License-Identifier: LGPL-2.1+
 #
 
-import argparse
 import os
 import sys
 import subprocess
 
-CLANG_FORMATTERS = [
-    "clang-format-11",
-    "clang-format-13",
-    "clang-format",
-]
 CLANG_DIFF_FORMATTERS = [
     "clang-format-diff-11",
     "clang-format-diff-13",
     "clang-format-diff",
 ]
-FIXUPS = {}
-
-
-def parse_args():
-    parser = argparse.ArgumentParser(description="Reformat code to match style")
-    parser.add_argument("files", nargs="*", help="files to reformat")
-    args = parser.parse_args()
-    return args
 
 
 def select_clang_version(formatters):
@@ -44,77 +30,25 @@ def select_clang_version(formatters):
     sys.exit(1)
 
 
-def reformat_file(formatter, f):
-    print("Reformatting %s using %s" % (f, formatter))
-    lines = None
-    with open(f, "r") as rfd:
-        lines = rfd.readlines()
-    ret = subprocess.run(
-        [formatter, "-style=file", f], capture_output=True, check=True, text=True
-    )
-    if ret.returncode:
-        print("Failed to run formatter")
-        sys.exit(1)
-    formatted = ret.stdout.splitlines(True)
-    save = False
-    for idx, line in enumerate(formatted):
-        for fixup in FIXUPS:
-            if fixup in line:
-                formatted[idx] = line.replace(fixup, FIXUPS[fixup])
-        if not save and formatted[idx] != lines[idx]:
-            save = True
-    if save:
-        with open(f, "w") as wfd:
-            wfd.writelines(formatted)
-
-
-def reformat_files(files):
-    formatter = select_clang_version(CLANG_FORMATTERS)
-    for f in files:
-        if not os.path.exists(f):
-            print("%s does not exist" % f)
-            sys.exit(1)
-        if not (f.endswith(".c") or f.endswith(".h")):
-            print("Skipping %s" % f)
-            continue
-        reformat_file(formatter, f)
-
-
-def reformat_diff():
+## Entry Point ##
+if __name__ == "__main__":
     formatter = select_clang_version(CLANG_DIFF_FORMATTERS)
     ret = subprocess.run(
         ["git", "diff", "-U0", "HEAD"], capture_output=True, check=True, text=True
     )
     if ret.returncode:
-        print("Failed to run git diff")
+        print("Failed to run git diff: %s" % ret.stderr)
         sys.exit(1)
     ret = subprocess.run(
-        [formatter, "-p1"], input=ret.stdout, capture_output=True, check=True, text=True
+        [formatter, "-p1"], input=ret.stdout, capture_output=True, text=True
     )
     if ret.returncode:
-        print("Failed to run formatter")
+        print("Failed to run formatter: %s % ret.stderr")
         sys.exit(1)
-    formatted = ret.stdout.splitlines(True)
-    for idx, line in enumerate(formatted):
-        if not line.startswith("+"):
-            continue
-        for fixup in FIXUPS:
-            if fixup in line:
-                formatted[idx] = line.replace(fixup, FIXUPS[fixup])
-    fixedup = "".join(formatted)
     ret = subprocess.run(
-        ["patch", "-p0"], input=fixedup, capture_output=True, check=True, text=True
+        ["patch", "-p0"], input=ret.stdout, capture_output=True, text=True
     )
     if ret.returncode:
-        print("Failed to run patch")
+        print("Failed to run patch: %s" % ret.stderr)
         sys.exit(1)
-
-
-## Entry Point ##
-if __name__ == "__main__":
-    args = parse_args()
-    if len(args.files) == 0:
-        reformat_diff()
-    else:
-        reformat_files(args.files)
     sys.exit(0)