jql: a jq wrapper

jql

#!/bin/bash
# A wrapper of the `jq` command that makes it easier to be used in a chain of
# commands. You can put the filename arguments at the front, so it's easier to
# edit the filter when you need to run the command again. When `jql` is the
# last command in a chain (in which case the STDOUT is a TTY), a pager (less)
# will be used

opts=()
filter=
files=()

while [ "$#" -gt 0 ]; do
    case "$1" in
        -*) opts+=("$1") ;;
        *)
            if [ -f "$1" ]; then
                files+=("$1")
            else
                if [ -z "$filter" ]; then
                    filter="$1"
                else
                    echo "ERROR: Unrecognized argument: $1" >&2
                    exit 1
                fi
            fi
            ;;
    esac
    shift
done

[ -z "$filter" ] && filter=.

jq_opts=(
    "${opts[@]}"
    "${filter}"
    "${files[@]}"
)

if [ -t 1 ]; then
    # STDOUT is a tty
    jq -C "${jq_opts[@]}" | less -iRF
else
    exec jq "${jq_opts[@]}"
fi