A bash script for posting statuses to Mastodon

mastodon-status

#!/bin/bash

usage() {
  program_name=$(basename $0)
  bold=$(tput bold)
  normal=$(tput sgr0)
  cat <<EOM
  Usage: $program_name [options] status

  Post a status update to a Mastodon account.

  Arguments:

    ${bold}status${normal}  A status message (quoted).

  Options:

    -a    An access token used to post to the server.
    -s    The domain name of the Mastodon server.
    -r    Specify a status ID to post in reply to.
    -h    Display the help message.

  Environment variables:

    The following environment variables may be used in place of the options.

    MASTODON_SERVER         The domain name of the Mastodon server.
    MASTODON_ACCESS_TOKEN   An access token used to post to the server.

  Examples:

    Post a status message.

      $ $program_name -a 12345 -s mastodon.social "Hello from the command line"

    Reply to a status.

      $ $program_name -a 12345 -s mastodon.social -r 12345 "A reply to a message."

EOM
  exit 0
}

while getopts ":hs:a:r:" opt; do
  case ${opt} in
    h )
      usage;
      ;;
    s )
      MASTODON_SERVER=${OPTARG}
      ;;
    a )
      MASTODON_ACCESS_TOKEN=${OPTARG}
      ;;
    r )
      in_reply_to=${OPTARG}
      ;;
    \? )
      echo "Invalid option -${OPTARG}"
      exit 1
      ;;
    esac
done
shift $((OPTIND-1))

status=$1

if [ -z "$MASTODON_ACCESS_TOKEN" ]
then
  echo "  Must provide an access token"
  echo ""
  usage;
fi

if [ -z "$MASTODON_SERVER" ]
then
  echo "  Must provide a Mastodon server"
  echo ""
  usage;
fi

if [ -z "$status" ]
then
  echo "  Must provide a status"
  echo ""
  usage;
fi

payload="{\"status\": \"$status\", \"media_ids\": null, \"poll\": null"
if [ ! -z "$in_reply_to" ]
then
  payload="$payload, \"in_reply_to_id\": \"$in_reply_to\""
fi
payload="$payload }"

curl -X POST \
  -d "$payload" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MASTODON_ACCESS_TOKEN" \
  "https://$MASTODON_SERVER/api/v1/statuses"