#!/bin/sh
#
# Set some environmental variables for pylint and run it.
#
# You may specify single files or modules as parameters.
#
# If no parameters are given, all python files are checked.
#

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
if [ ! -x /usr/bin/pylint ] ; then
    echo >&2 "/usr/bin/pylint not found"
    echo >&2 "please run \"apt-get install pylint\" first"
    exit 1
fi


is_filename() {
    [ "${1%.py}" != "$1" -a -e "$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() {
    if [ -d "$1" ] ; then
	find "$1" -type f -name \*.py | while read fname; do
            run_pylint "$fname"
	done
    else
	local new_pythonpath="${BASIC_PYTHONPATH}$(get_pythonpath "$1")"
	local arg="$(get_module "$1")"
	set +e
	PYTHONPATH="$new_pythonpath" pylint "$arg"
	set -e
    fi
}


# If no arguments were given, check the complete (basic) package and
# the plugins.
if [ $# -eq 0 ] ; then
    run_pylint cryptobox
    run_pylint "$PROJ_DIR/plugins"
else
    for name in "$@" ; do
	run_pylint "$name"
    done
 fi