#!/bin/sh
#
# set some environmental variables for pylint and run it
#
# you may specify single files or modules as parameters
#
# no parameters: check all python files
#

set -eu

PROJ_DIR=$(dirname "$0")/..
PROJ_DIR=$(cd "$PROJ_DIR"; pwd)

# implicitely used by pylint
export PYLINTRC=$PROJ_DIR/src/pylintrc
BASIC_PYTHONPATH=$PROJ_DIR/src


# check for the pylint program
[ ! -x /usr/bin/pylint ] && echo >&2 "please run \"apt-get install pylint\" first" && exit 1


is_filename() {
	echo "$1" | grep -q "\.py$" && test -e "$1" && return 0
	return 1
}


get_pythonpath() {
	# maybe the argument is a file instead of a module name
	is_filename "$1" && echo -n ":$(dirname "$1")"
}


get_module() {
	if is_filename "$1"; then
		echo -n "$(basename "${1%.py}")"
	 else
		echo -n "$1"
	 fi
}


run_pylint() {
	local new_pythonpath="${BASIC_PYTHONPATH}$(get_pythonpath "$1")"
	local arg="$(get_module "$1")"
	PYTHONPATH="$new_pythonpath" pylint "$arg"
}


# check the complete (basic) package and the plugins, if no arguments were given
if test $# -eq 0; then
	run_pylint cryptobox
	find "$PROJ_DIR/plugins" -type f -name \*.py | while read fname; do
		run_pylint "$fname"
	 done
 else
	while test $# -gt 0; do
		run_pylint "$1"
		shift
	 done
 fi