Shell script to find "no match of right hand side" in elixir

find-no-match.sh

#! /usr/bin/env bash
# This uses the silver searcher (ag)

TMP_FILE=$(mktemp)

# find :ok tuples w/ no error match
ag "^\s{0,}\{:ok.*\s=" --ignore 'test' -G '.ex$' . > ${TMP_FILE}

# find :ok left side matches w/ no error handling
ag "^\s{0,}:ok.*=" --ignore 'test' -G '.ex$' . >> ${TMP_FILE}

# Scrub matches in list expressions and cases
cat ${TMP_FILE} | grep -ve '->' | grep -ve '<-'