readme.md

1. Get your Twitter archive;
2. Save this script as an executable in the root folder of your tweets archive (~/tweets);
3. Save com.paveldruzyak.grailbird_updater.plist to ~/Library/LaunchAgents
4. run from console launchctl load -w ~/Library/LaunchAgents/com.paveldruzyak.grailbird_updater.plist

It auto-installs grailbird_updater in an isolated location. Thanks, @DeMarko!

com.paveldruzyak.grailbird_updater.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Label</key>
	<string>com.paveldruzyak.grailbird_updater</string>
	<key>ProgramArguments</key>
	<array>
    <string>/Users/paveldruzyak/tweets/update.sh</string>
	</array>
	<key>StandardOutPath</key>
	<string>/var/log/grailbird_updater.log</string>
	<key>StandardErrorPath</key>
	<string>/var/log/grailbird_updater.log</string>
	<key>Debug</key>
	<true/>
	<key>StartInterval</key>
	<integer>14400</integer>
</dict>
</plist>

update.sh

#!/usr/bin/env bash
set -e

here="$(cd "${0%/*}" && pwd)"

export GEM_HOME="$here/.gem"
export GEM_PATH="$GEM_HOME"
export PATH="$GEM_HOME/bin:$PATH"

if ! [ -d "$GEM_HOME" ]; then
  ruby_version="$(ruby -e 'puts RUBY_VERSION')"
  if [ "$ruby_version" \< "1.9" ]; then
    echo "grailbird_updater needs Ruby 1.9 to run (was $ruby_version)" >&2
    exit 1
  fi
  gem install --no-rdoc --no-ri grailbird_updater
fi

exec grailbird_updater --verbose "$here"