check-style.sh

#!/bin/bash
#
# Script to check include/test code for common code style errors.
#
# This script currently checks for
#
# 1. use of tabs instead of spaces
# 2. trailing spaces
# 3. missing space between keyword and parenthesis, e.g.: for(, if(, while(
# 4. opening brace on its own line. It should always be on the same line as the
#    if/while/for/do statment.
# 5. Missing space between right parenthesis and brace, e.g. 'for (...){'
#
# Invoke as: resources/check-style.sh
#

if [ -n "$BASH_VERSION" ]; then
    shopt -s globstar
fi

errors=0
IFS=$'\n'
found=
# The mt=41 sets a red background for matched tabs:
exec 3< <(GREP_COLORS='mt=41' grep $'\t' include/**/*.h src/**/*.{cpp,py} -rn --color=always)
while read -u 3 f; do
    if [ -z "$found" ]; then
        echo -e '\e[31m\e[01mError: found tabs instead of spaces in the following files:\e[0m'
        found=1
        errors=1
    fi

    echo "    $f"
done

found=
# The mt=41 sets a red background for matched trailing spaces
exec 3< <(GREP_COLORS='mt=41' grep '\s\+$' include/**/*.h src/**/*.{cpp,py} -rn --color=always)
while read -u 3 f; do
    if [ -z "$found" ]; then
        echo -e '\e[31m\e[01mError: found trailing spaces in the following files:\e[0m'
        found=1
        errors=1
    fi

    echo "    $f"
done

found=
exec 3< <(GREP_COLORS='mt=41' grep '^\s*{\s*$' include/**/*.h src/**/*.cpp -rn --color=always)
while read -u 3 f; do
    if [ -z "$found" ]; then
        echo -e '\e[31m\e[01mError: braces should occur on the same line as the if/while/.. statement. Found issues in the following files: \e[0m'
        found=1
        errors=1
    fi

    echo "    $f"
done

found=
exec 3< <(grep '\<\(if\|catch\|for\|while\)(\|){' include/**/*.h src/**/*.{cpp,py} -rn --color=always)
while read -u 3 line; do
    if [ -z "$found" ]; then
        echo -e '\e[31m\e[01mError: found the following coding style problems:\e[0m'
        found=1
        errors=1
    fi

    echo "    $line"
done

exit $errors