#!/usr/bin/env bash

if [ "$(uname)" == "Darwin" ]; then
    PATH=$PATH:/usr/local/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:
elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
    PATH=$PATH:/usr/local/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:
elif [ "$(expr substr $(uname -s) 1 10)" == "MINGW32_NT" ]; then
    PATH=$PATH:/usr/local/bin:/usr/local/sbin:/usr/local/opt/llvm/bin:
fi


# Enforce citra's whitespace policy
git config --local core.whitespace tab-in-indent,trailing-space

paths_to_check="src/ CMakeLists.txt"

# If there are whitespace errors, print the offending file names and fail.
if ! git diff --cached --check -- $paths_to_check ; then
    cat<<END

Error: This commit would contain trailing spaces or tabs, which is against this repo's policy.
Please correct those issues before committing. (Use 'git diff --check' for more details)
If you know what you are doing, you can try 'git commit --no-verify' to bypass the check
END
    exit 1
fi

# Check for tabs, since tab-in-indent catches only those at the beginning of a line
if git diff --cached -- $paths_to_check | egrep '^\+.*	'; then
    cat<<END
Error: This commit would contain a tab, which is against this repo's policy.
If you know what you are doing, you can try 'git commit --no-verify' to bypass the check.
END
    exit 1
fi

for f in $(git diff --name-only --diff-filter=ACMRTUXB --cached); do
    if ! echo "$f" | egrep -q "[.](cpp|h)$"; then
        continue
    fi
    if ! echo "$f" | egrep -q "^src/"; then
        continue
    fi
    d=$(clang-format "$f" | diff -u "$f" -)
    if ! [ -z "$d" ]; then
        echo "!!! $f not compliant to coding style, here is the fix:"
        echo "$d"
        fail=1
    fi
done

exit "${fail-0}"