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#!/usr/bin/env bash
#=============================================================================
# Copyright 2015-2017 Kitware, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#=============================================================================
usage='usage: clang-format.bash [<options>] [--]
--help Print usage plus more detailed help.
--clang-format <tool> Use given clang-format tool.
--amend Filter files changed by HEAD.
--cached Filter files locally staged for commit.
--modified Filter files locally modified from HEAD.
--tracked Filter files tracked by Git.
'
help="$usage"'
Example to format locally modified files:
Utilities/Scripts/clang-format.bash --modified
Example to format locally modified files staged for commit:
Utilities/Scripts/clang-format.bash --cached
Example to format files modified by the most recent commit:
Utilities/Scripts/clang-format.bash --amend
Example to format all files:
Utilities/Scripts/clang-format.bash --tracked
Example to format the current topic:
git filter-branch \
--tree-filter "Utilities/Scripts/clang-format.bash --tracked" \
master..
'
die() {
echo "$@" 1>&2; exit 1
}
#-----------------------------------------------------------------------------
# Parse command-line arguments.
clang_format=''
mode=''
while test "$#" != 0; do
case "$1" in
--amend) mode="amend" ;;
--cached) mode="cached" ;;
--clang-format) shift; clang_format="$1" ;;
--help) echo "$help"; exit 0 ;;
--modified) mode="modified" ;;
--tracked) mode="tracked" ;;
--) shift ; break ;;
-*) die "$usage" ;;
*) break ;;
esac
shift
done
test "$#" = 0 || die "$usage"
# Find a default tool.
tools='
clang-format-6.0
clang-format
'
if test "x$clang_format" = "x"; then
for tool in $tools; do
if type -p "$tool" >/dev/null; then
clang_format="$tool"
break
fi
done
fi
# Verify that we have a tool.
if ! type -p "$clang_format" >/dev/null; then
echo "Unable to locate a 'clang-format' tool."
exit 1
fi
if ! "$clang_format" --version | grep 'clang-format version 6\.0' >/dev/null 2>/dev/null; then
echo "clang-format version 6.0 is required (exactly)"
exit 1
fi
# Select listing mode.
case "$mode" in
'') echo "$usage"; exit 0 ;;
amend) git_ls='git diff-tree --diff-filter=AM --name-only HEAD -r --no-commit-id' ;;
cached) git_ls='git diff-index --diff-filter=AM --name-only HEAD --cached' ;;
modified) git_ls='git diff-index --diff-filter=AM --name-only HEAD' ;;
tracked) git_ls='git ls-files' ;;
*) die "invalid mode: $mode" ;;
esac
# List files as selected above.
$git_ls |
# Select sources with our attribute.
git check-attr --stdin format.clang-format-6.0 |
grep -e ': format\.clang-format-6\.0: set$' |
sed -n 's/:[^:]*:[^:]*$//p' |
# Update sources in-place.
tr '\n' '\0' |
xargs -0 "$clang_format" -i
|
