reformat-shell

#!/bin/sh
#
# @author René Schwaiger <sanssecours@me.com>
# @brief Reformats Shell source code
# @date 07.09.2018
# @tags reformat

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

cd "$SOURCE" || exit

SHFMT="$(which shfmt)"
SHFMT_VERSION="$(shfmt --version 2> /dev/null | sed s/^v//)"
SHFMT_MAJOR_VERSION=$(printf "$SHFMT_VERSION" | sed -E 's/([1-9]+)\..*/\1/')
if [ -z "${SHFMT}" ] || [ "$SHFMT_MAJOR_VERSION" = "(devel)" ] || [ "$SHFMT_MAJOR_VERSION" -ge 4 ]; then
	SHFMT="$(which shfmt3)"
	SHFMT_VERSION="$(shfmt3 --version 2> /dev/null | sed s/^v//)"
	SHFMT_MAJOR_VERSION=$(printf "$SHFMT_VERSION" | sed -E 's/([1-9]+)\..*/\1/')
	if [ -z "${SHFMT}" ] || [ "$SHFMT_MAJOR_VERSION" = "(devel)" ] || [ "$SHFMT_MAJOR_VERSION" -ge 4 ]; then
		printf >&2 'shfmt:   %s\n' "$SHFMT"
		printf >&2 'Version: %s\n' "$SHFMT_VERSION"
		printf >&2 'Please install `shfmt` version 3\n'
		exit 1
	fi
fi

shell_files=$(list_shell_scripts)

ignore_file=$(dirname "$0")/.shfmtignore
if [ -f "$ignore_file" ]; then
	shell_files=$(printf "%s\n" "$shell_files" | grep -v -f "$ignore_file")
fi

if [ $# -gt 0 ]; then
	tmpfile=$(mktemp /tmp/elektra-reformat-shell.XXXXXX)
	printf "%s\n" "$@" > "$tmpfile"
	shell_files=$(printf "%s\n" "$shell_files" | grep -x -F -f "$tmpfile")
	rm "$tmpfile"
fi

non_ignored=$(printf "%s\n" "$shell_files" | sed -nE 's/(.*)/'"'"'\1'"'"'/p' | xargs git check-ignore -vn | sed -nE 's/^::[[:blank:]]*(.*)$/\1/p')
printf "%s\n" "$non_ignored" | sed -nE 's/(.*)/'"'"'\1'"'"'/p' | xargs "$SHFMT" -s -sr -w
"$SHFMT" -s -sr -w 'tests/shell/include_common.sh.in'

end_line=$(grep -n '^### END OF INCLUDE FILE ###$' 'tests/shell/include_common.sh.in' | cut -d':' -f1)

if [ -z "$end_line" ]; then
	printf 2>&1 'tests/shell/include_common.sh.in must contain the line "### END OF INCLUDE FILE ###" to indicate the end of the actual file content\n'
	exit 1
fi

if [ "$end_line" -ge 1000 ]; then
	printf 2>&1 'tests/shell/include_common.sh.in too long only 999 lines allowed.\n'
	exit 1
fi

comment_lines=$((999 - end_line))
head -n "$end_line" 'tests/shell/include_common.sh.in' > a.tmp && mv a.tmp 'tests/shell/include_common.sh.in'
awk -v LINES="${comment_lines}" 'BEGIN { for (c = 0; c < LINES; c++) printf "#\n"; }' >> 'tests/shell/include_common.sh.in'
echo "# empty lines up to 1000 so that line numbers in the resulting scripts are more useful" >> 'tests/shell/include_common.sh.in'