Bash one-liners to count lines of code.

count_loc.sh

# Only returns the total lines of code.
# Remove the tail call to show a more verbose output.
wc -l $(find . -name '*.lua') | tail -1

# Add more files as parameters.
wc -l $(find . -name '*.lua' -or -name '*.sh' ) | tail -1

# This would return the lines of code of all .lua files in your repository.
# Simply exchange .lua with the extension you want to search for.
wc -l $(git ls-files | grep -e '.*\.lua' )