Tweet, when the given HTML looks different.

This is a notifier, that can inspect a given web page (html) for changes and post changes to twitter.com (or order channel).

Installation

You system needs to have these first:

• git
• sqlite3
• perl v5.18 or newer
• cpm

Basically, this "app" a set of programs that should be scheduled as cronjob. In this document, let /app/tweet-html-diff/ be the installation target.

Here are the steps to manually install everything under /app/tweet-html-diff/

git clone git@github.com:g0v/tweet-html-diff.git /app/tweet-html-diff/
cd /app/tweet-html-diff/
cpm install

Setup: database

All states are mantained in a single SQLite database, which can be initialized by doing this:

cat init.sql | sqlite3 /app/tweet-html-diff/var/example.sqlite3

Setup: cronjobs

Programs are split into 3 kinds of roles, one who collect new corpus, one who figures out what are new entries, the other who post something to a notification channel.

These are the ones that collect new corpus

• collect-html-diff.pl
• collect-text-diff.pl

The one that derives what are new entries:

• spew-new-entries

The ones that post entries to a notification channel

• feed-to-console.pl
• feed-to-feedro.pl
• feed-to-mastodon.pl
• feed-to-plurk.pl
• feed-to-telegram.pl

In crontab:

*/15 * * * * perl -Mlib=/app/tweet-html-diff/local/lib/perl5 /app/tweet-html-diff/collect-html-diff.pl