reformat-cmake

#!/bin/sh
#
# @author René Schwaiger <sanssecours@me.com>
# @brief Reformats CMake source code
# @date 07.05.2018
# @tags reformat

SCRIPTS_DIR=$(dirname "$0")
. "${SCRIPTS_DIR}/include-common"

# The command `cmake-format --version` seems to print the version number either to `stdout` or `stderr`, depending on the current system.
# To make sure we always capture the version number correctly we therefore redirect `stderr` to the same file descriptor as `stdout`,
# before we save the output of the command.
CMAKE_FORMAT="$(which cmake-format)" && CMAKE_FORMAT_VERSION="$("$CMAKE_FORMAT" 2>&1 --version)"

if [ -z "${CMAKE_FORMAT}" ] || [ "$CMAKE_FORMAT_VERSION" != "0.5.4" ]; then
	printf >&2 'cmake-format: %s\n' "$CMAKE_FORMAT"
	printf >&2 'Version:      %s\n' "$CMAKE_FORMAT_VERSION"
	printf >&2 'Please install `cmake-format` version 0.5.4\n'
	exit 1
fi

cd "$SOURCE" || {
	printf >&2 'Unable to change into source directory'
	exit 1
}

output=$("${CMAKE_FORMAT}" 2>&1 CMakeLists.txt)

if [ $? != 0 ]; then
	printf >&2 'It seems your local installation of `cmake-format` is broken:\n\n%s' "$output"
	exit 1
fi

if [ -z "$(which sponge)" ]; then
	printf >&2 'Please install `sponge`\n'
	exit 1
fi

if [ $# -gt 0 ]; then
	files=$(printf "%s\n" "$@" | grep -x -E '.*\.cmake|.*/CMakeLists.txt|CMakeLists.txt')
	if [ -z "$files" ]; then
		exit 0
	fi
else
	files=$(git ls-files '*.cmake' '*/CMakeLists.txt' 'CMakeLists.txt')
fi
printf "%s\n" "$files" | sed -nE 's/(.*)/'"'"'\1'"'"'/p' | xargs "$CMAKE_FORMAT" -i
for file in $files; do
	unexpand "$file" | sponge "$file"
done