#!/bin/sh
#
#   SPDX-FileCopyrightText: 2014 Aurélien Gâteau <agateau@kde.org>
#   SPDX-FileCopyrightText: 2019 Adriaan de Groot <groot@kde.org>
#   SPDX-License-Identifier: BSD-2-Clause
#
# Calls astyle with settings matching Calamares coding style
# Requires astyle >= 2.04 and clang-format-8 or later
#
# You can pass in directory names, in which case the files
# in that directory (NOT below it) are processed.
#
LANG=C
LC_ALL=C
LC_NUMERIC=C
export LANG LC_ALL LC_NUMERIC

BASEDIR=$(dirname $0)
TOPDIR=$( cd $BASEDIR/.. && pwd -P )
test -d "$BASEDIR" || { echo "! Could not determine base for $0" ; exit 1 ; }
test -d "$TOPDIR" || { echo "! Cound not determine top-level source dir" ; exit 1 ; }
test -f "$TOPDIR/.clang-format.base" || { echo "! No .clang-format support files in $TOPDIR" ; exit 1 ; }

AS=$( which astyle )

# Allow specifying CF_VERSIONS outside already
CF_VERSIONS="$CF_VERSIONS clang-format-8 clang-format80 clang-format90 clang-format-9.0.1 clang-format"
for _cf in $CF_VERSIONS
do
	# Not an error if this particular clang-format isn't found
	CF=$( which $_cf 2> /dev/null || true )
	test -n "$CF" && break
done

test -n "$AS" || { echo "! No astyle found in PATH"; exit 1 ; }
test -n "$CF" || { echo "! No clang-format ($CF_VERSIONS) found in PATH"; exit 1 ; }
test -x "$AS" || { echo "! $AS is not executable."; exit 1 ; }
test -x "$CF" || { echo "! $CF is not executable."; exit 1 ; }

### CLANG-FORMAT-WRANGLING
#
# Version 7 and earlier doesn't understand all the options we would like
# Version 8 is ok
# Version 9 is ok
# Later versions change some defaults so need extra wrangling.
# .. there are extra files that are appended to the settings, per
# .. clang-format version.

format_version=`"$CF" --version | tr -dc '[^.0-9]' | cut  -d . -f 1`
case "$format_version" in
	[0-7] )
		echo "! Clang-format version 8+ required"
		exit 1
		;;
	[89] )
		:
		;;
	* )
		echo "! Clang-format version '$format_version' unsupported."
		exit 1
		;;
esac
_fmt="$TOPDIR/.clang-format"
cp "$_fmt.base" "$_fmt"
for f in "$extra_settings" ; do
	test -f "$_fmt.$f" && cat "$_fmt.$f" >> "$_fmt"
done


### FILE PROCESSING
#
#
set -e

any_dirs=no
for d in "$@"
do
	test -d "$d" && any_dirs=yes
done

style_some()
{
	if test -n "$*" ; then
		$AS --options=$BASEDIR/astylerc --quiet "$@"
		$CF -i -style=file "$@"
	fi
}

if test "x$any_dirs" = "xyes" ; then
	for d in "$@"
	do
		if test -d "$d"  ; then
			style_some $( find "$d" -maxdepth 1 -type f -name '*.cpp' -o -name '*.h' )
		else
			style_some "$d"
		fi
	done
else
	style_some "$@"
fi

### CLANG-FORMAT-WRANGLING
#
# Restore the original .clang-format
cp "$_fmt.base" "$_fmt"