#!/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
#
# Apply Calamares-style formatting to sources. Requires clang-format-15.
#
# You can pass in directory names, in which case the files
# in that directory (NOT below it) are processed.
#
# If the environment variable CLANG_FORMAT is set to a (full path) and
# that path is executable, it will be used if possible.
#
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" || { echo "! No .clang-format support files in $TOPDIR" ; exit 1 ; }

# Start with CLANG_FORMAT, if it is specified
CF_VERSIONS=""
if test -n "$CLANG_FORMAT" && test -x "$CLANG_FORMAT" ; then
	CF_VERSIONS="$CLANG_FORMAT"
fi
# And a bunch of other potential known versions of clang-format, newest first
CF_VERSIONS="$CF_VERSIONS clang-format-17"
CF_VERSIONS="$CF_VERSIONS clang-format-16 clang-format-16.0.6 "
CF_VERSIONS="$CF_VERSIONS clang-format15 clang-format-15 "
# Generic name of clang-format
CF_VERSIONS="$CF_VERSIONS 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 "$CF" || { echo "! No clang-format ($CF_VERSIONS) found in PATH"; 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 12 handled lambdas nicely and was the norm for Calamares 3.2.
# Version 13 was also ok.
# Version 14 behaves differently with short-functions-in-class,
#   spreading functions out that 13 keeps on one line. To avoid
#   ping-pong commits, forbid 14.
# Version 15 is available on recent-ish Ubuntus and FreeBSD, pick it.
#   It also supports inserting braces, which is the one thing we kept
#   astyle around for.
# Version 16 is available on openSUSE and is ok as well.
# Version 17 is available on FreeBSD and KaOS and is ok as well.

format_version=`"$CF" --version | tr -dc '[^.0-9]' | cut  -d . -f 1`
case "$format_version" in
	15|16|17 )
		:
		;;
	* )
		echo "! Clang-format version '$format_version' unsupported, versions 15-17 are ok."
		exit 1
		;;
esac


### FILE PROCESSING
#
#
set -e

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

style_some()
{
	if test -n "$*" ; then
		$CF -i -style=file "$@"
	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
