#!/bin/sh

if [ "$#" -ne 3 ]; then
    echo "Usage: $0 input1.json input2.json output.json" >&2
    exit 1
fi

i1="$1"
i2="$2"
out="$3"

echo "input 1 len: $(jq 'length' "$i1")"
echo "input 2 len: $(jq 'length' "$i2")"

jq -s '.[0] + .[1]' "$i1" "$i2" >"$out"

if [ $? -eq 0 ]; then
    echo "merged files into $out"
    echo "output len: $(jq 'length' "$out")"
else
    echo "error merging files" >&2
    exit 1
fi