#!/usr/bin/env python3
#
# Copyright (c) 2016 ARM Limited
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# property including but not limited to intellectual property relating
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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from tempfile import TemporaryFile
import os
import subprocess
import sys

from style.repo import GitRepo
from style.verifiers import all_verifiers, all_regions
from style.style import StdioUI, check_ignores

import argparse

parser = argparse.ArgumentParser(
    description="gem5 git style checker hook")

parser.add_argument("--verbose", "-v", action="store_true",
                    help="Produce verbose output")

args = parser.parse_args()

git = GitRepo()

opts = {}
repo_base = git.repo_base()
ui = StdioUI()

os.chdir(repo_base)
failing_files = set()
staged_mismatch = set()

for status, fname in git.status(filter="MA", cached=True):
    if args.verbose:
        print("Checking {}...".format(fname))
    if check_ignores(fname):
        continue
    if status == "M":
        regions = git.staged_regions(fname)
    else:
        regions = all_regions

    # Show they appropriate object and dump it to a file
    status = git.file_from_index(fname)
    f = TemporaryFile()
    f.write(status.encode('utf-8'))

    verifiers = [ v(ui, opts, base=repo_base) for v in all_verifiers ]
    for v in verifiers:
        f.seek(0)
        # It is prefered that the first check is silent as it is in the
        # staged file. If the check fails, then we will do it non-silently
        # on the current file, reporting meaningful shortcomings
        if not v.skip(fname) and v.check(fname, regions, fobj=f, silent=True):
            failing_files.add(fname)
            if not v.check(fname, regions):
                staged_mismatch.add(fname)
    f.close()

if failing_files:
    if len(failing_files) > len(staged_mismatch):
        print("\n", file=sys.stderr)
        print("Style checker failed for the following files:", file=sys.stderr)
        for f in failing_files:
            if f not in staged_mismatch:
                print("\t{}".format(f), file=sys.stderr)
        print("\n", file=sys.stderr)
        print(
            "Please run the style checker manually to fix "
            "the offending files.\n"
            "To check your modifications, run: util/style.py -m",
            file=sys.stderr)

    print("\n", file=sys.stderr)
    if staged_mismatch:
        print(
            "It looks like you have forgotten to stage your "
            "fixes for commit in\n"
            "the following files: ", file=sys.stderr)
        for f in staged_mismatch:
            print("\t{}".format(f), file=sys.stderr)
        print("Please `git --add' them", file=sys.stderr)
    sys.exit(1)

@@ -2968,17 +2968,16 @@
 Show the
-y
  appropr
@@ -3010,16 +3010,29 @@
  a file%0A
+    try:%0A    
     stat
@@ -3059,24 +3059,294 @@
 ndex(fname)%0A
+    except UnicodeDecodeError:%0A        print(%22Decoding '%22 + fname%0A            + %22' throws a UnicodeDecodeError.%22, file=sys.stderr)%0A        print(%22Please check '%22 + fname%0A            + %22' exclusively uses utf-8 character encoding.%22, file=sys.stderr)%0A        sys.exit(1)%0A%0A
     f = Temp

Add check to ensure files are utf-8 in pre-commit