Adding script to check if code is formatted

#!/bin/bash

PROJECT_SRC="$(pwd)/src"

PROJECT_INCLUDE="$(pwd)/include"

RUN_FORMAT=false

usage_short() {

    echo "

usage: check_format.sh [-h] [-s <PROJECT_SRC>] [-i <PROJECT_INCLUDE>]

	"

}

help_msg() {

    usage_short

    echo "

This script checks if the code is formatted correctly by the rules set in .clang-format

optional arguments:

    -h, --help          shows this help message and exits

    -s <PROJECT_SRC>, --src <PROJECT_SRC>

                        path to the src/ directory of the project

                        (default: 'pwd/src')

    -i <PROJECT_INCLUDE>, --include <PROJECT_INCLUDE>

                        path to the include/ directory of the project

                        (default: 'pwd/include')

    -r, --run_format    run clang-formatter before formatting check

                        DISCLAIMER: FILES ARE MODIFIED IN PLACE!

"

}

POSITIONAL=()

while [[ $# -gt 0 ]]; do

    key="$1"

    case ${key} in

    -s | --src)

        PROJECT_SRC="$(readlink -mn "${2}")"

        shift # past argument

        shift # past value

        ;;

    -i | --include)

        PROJECT_INCLUDE="$(readlink -mn "${2}")"

        shift # past argument

        shift # past value

        ;;

    -r | --run_format)

        RUN_FORMAT=true

        shift # past argument

        ;;

    -h | --help)

        help_msg

        exit

        ;;

    *) # unknown option

        POSITIONAL+=("$1") # save it in an array for later

        shift              # past argument

        ;;

    esac

done

set -- "${POSITIONAL[@]}" # restore positional parameters

FAIL=false

echo "* Source directory: $PROJECT_SRC"

if [[ ! -d "$PROJECT_SRC" ]]; then

    echo "*** ERR: $PROJECT_SRC does not exist."

    exit 1

fi

echo "* Include directory: $PROJECT_INCLUDE"

if [[ ! -d "$PROJECT_INCLUDE" ]]; then

    echo "*** ERR: $PROJECT_INCLUDE does not exist."

    exit 1

fi

echo "* Checking for unformatted files ..."

if [[ "$RUN_FORMAT" == true ]]; then

    echo "*** Running clang-format on all files and formatting them in place."

    echo "* The following files and number of lines were formatted:"

else

    echo "* The following files and number of lines need to be formatted:"

fi

echo "------------------------------------------"

while IFS= read -r -d '' FILE; do

    UNFORMATTED_LINES=$(diff -u <(cat "$FILE") <(clang-format -style=file "$FILE") | wc -l)

    if ((UNFORMATTED_LINES > 0)); then

        if [[ "$RUN_FORMAT" == true ]]; then

            echo "*** Reformatting $UNFORMATTED_LINES lines in '$FILE'"

            clang-format -i -style=file "$FILE"

        else

            echo -n "$FILE "

            echo "$UNFORMATTED_LINES"

            FAIL=true

        fi

    fi

done < <(find "$PROJECT_SRC" "$PROJECT_INCLUDE" -type f \( -name "*.cpp" -o -name "*.hpp" \) -print0)

echo "------------------------------------------"

if [[ "$FAIL" == true ]]; then

    echo "* Format check failed! Format your code with 'clang-format -style=file' or pass '-r' to reformat files in place."

    exit 1

fi

echo "* Format check successful."