#!/bin/sh

#

# Check that the code follows the coding style

#

# If the code does not follow the coding style a warning will be printed.

#

version=`gnuindent --version 2> /dev/null`

if [ "x$version" = "x" ]; then

    version=`indent --version 2> /dev/null`

    if [ "x$version" = "x" ] || [[ "$version" != *GNU* ]]; then

        echo "Git pre-commit hook:"

        echo "Did not find GNU indent, please install it before continuing."

        exit 1

    fi

    INDENT=indent

else

    INDENT=gnuindent

fi

echo "*******************"

for file in `git diff-index --cached --name-only HEAD --diff-filter=ACMR`; do

    ext=$(expr "$file" : ".*\(\..*\)")

    case $ext in

        .c|.h)

            echo "Checking code style"

            # ckfile is the temporary checkout and we indent it

            ckfile=`git checkout-index --temp ${file} | cut -f 1`

            newfile=`mktemp /tmp/${ckfile}.XXXXXX` || exit 1

            $INDENT $ckfile -o $newfile 2>> /dev/null

            $INDENT $newfile 2>> /dev/null

            diff -u -p "${ckfile}" "${newfile}"

            r=$?

            rm "${ckfile}"

            rm "${newfile}"

            rm "${newfile}~"

            if [ $r != 0 ]; then

                echo "Warning: Code style error in $file"

                read -n1 -p "Do you want to CONTINUE committing? [Y/n]" opt < /dev/tty

                case $opt in

                    n|N)

                        echo

                        exit 1

                        ;;

                    *)

                        ;;

                esac

                echo "*******************"

            fi

            exit 0

            ;;

        *)

            echo "Not checking code style for this type of file"

            echo "*******************"

            ;;

    esac

done