jqsay -- turn bash args into json

jqsay

#!/usr/bin/env bash

# jq-say
# format string as JSON message
#
# treat odd args as keys and even args as values
# use jq to output something like this, for as many args supplied:
#   {"arg1": "arg2", "arg3": "arg4"}
#
# very helpful for echo'ing log messages as JSON
#
# ymmv if you don't use bash or if you supply and odd number of args or no args at all
#
# examples
#  jqsay foo bar baz bat
#    {
#      "foo": "bar",
#      "baz": "bat"
#    }
#
#  jqsay source myapp severity 3 human-readable "bla bla bla message" action restart
#    {
#      "source": "myapp",
#      "severity": "3",
#      "human-readable": "bla bla bla message",
#      "action": "restart"
#    }

jqsay(){
  cmd=(jq -c --null-input)
  jsony=""
  for i in `seq 1 2 $#`; do
    n=$((i+1))
    cmd+=("--arg \""arg${i}\"" \""${!n}"\"")
    jsony="${jsony}\"${!i}\": \$arg${i},"
  done
  cmd+=("'{${jsony::-1}}'")
  eval ${cmd[@]}
}