hooks/pre-commit

#!/bin/bash
#
# Copyright 2022 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/helpers.sh || exit $?

echo-info "Formatting C++ code using clang-format..."
clang_format="${FUCHSIA_EMBEDDER_DIR}"/bazel-flutter-embedder/external/fuchsia_clang/bin/clang-format
if [[ ! -f "${clang_format}" ]]
then
  if [[ -z "${LOCAL_FUCHSIA_PLATFORM_BUILD}" ]]
  then
    echo-warning "Failed to format C++ code because ${clang_format} does not exist."
    echo-warning "You can usually fix this by running:"
    echo-warning "bazel build --config=fuchsia_x64 //src/embedder"
    echo-warning "If that does not work, please open a bug at https://fxbug.dev "
  else
    # TODO(akbiggs): Make this case work.
    echo-warning "Formatting C++ code on commit does not work when LOCAL_FUCHSIA_PLATFORM_BUILD is set."
  fi
else
  # Format any C++ code that is:
  #   1. Being modified by the commit.
  #   2. Not copied from the engine repo, which has its own formatting rules.
  #   3. Not in third_party repos, which have their own formatting rules.
  source_files="$(git diff --cached --name-only --diff-filter=ACM | grep -v "/engine/" | grep -v "/third_party/" | grep -E "\.(cc|h)$")"
  if [[ ! -z "$source_files" ]]
  then
    $clang_format -i $source_files
    git add $source_files
  fi
fi

# TODO(akbiggs): Add clang-tidy checks to lint C++ code.
# TODO(akbiggs): Format markdown code.
# TODO(akbiggs): Format bazel code.