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Sequell is the stats IRC bot for #crawl on Libera IRC.

Sequell is the successor to the original #crawl Henzell which at one point shared the same code. There are still many references to Henzell in the source and configuration.

• Go 1.3 or better from http://golang.org/ or installed via your package manager.

  Your GOPATH environment variable must be correctly set, and $GOPATH/bin must be in your PATH for the seqdb tool.

• PostgreSQL 9

  1. Install PostgreSQL, create a database 'sequell' and a user 'sequell', and give the user access to the database with password 'sequell'.

  2. In the 'sequell' database, install the PostgreSQL citext and orafce extensions by running (as an admin user): CREATE EXTENSION citext; CREATE EXTENSION orafce;

     citext is available as part of Postgres contrib; orafce is available at: https://github.com/orafce/orafce

     Sequell needs the CITEXT extension for case-insensitive comparison and grouping and the orafce extension for the median aggregate function. You may choose to skip the orafce extension if you do not need the median() aggregate function.

     You can use the seqdb tool to create the database and extensions if you run it as a Postgres admin user:

     Build seqdb from the Sequell root directory:

      $ make
     

     Then create the database:

      $ seqdb createdb --admin postgres --adminpassword xyzzy
     

     Depending on what authentication mode you're using for Postgres, you may need to run seqdb as the postgres Unix user (if using ident auth), and/or override the host and port you're connecting on.

     If you're connecting to Postgres using Unix sockets, specify the Unix socket directory as the --host option:

      $ seqdb --host /var/run/postgresql createdb
     

     Note that you still have to install the orafce and citext extensions for Postgres system-wide before you can create a database that uses these extensions. seqdb createdb merely automates the process of creating the database and sequell database user and creating the extensions in the database; it cannot install the extensions system-wide.

  3. Set up the database:

     Build Sequell's DB ops tool using make (this requires Go 1.3+):

      $ make
     

     Create the database tables in the schema:

      $ seqdb create-tables
     

     Populate the database: first fetch the server logs, then load them:

      $ seqdb fetch && seqdb load
     

     Create indexes and constraints on the database after loading logs:

      $ seqdb create-indexes
     

     You can change the database seqdb connects to, and how it connects. Run seqdb for an overview.

• RE2

  1. Install RE2 using the package manager on your system (libre2-dev on the Debian family).

• Ruby

  Sequell requires ruby 1.9 or better. You may need to install rubygems and the ruby headers (ruby-dev), depending on your system.

• Perl

  Perl >= 5.14

Sequell wants Perl modules for IRC, YAML parsing, DB connectivity, etc. In addition the SQL query commands require several Ruby gems. To install Sequell's dependencies, use:

# ./scripts/install-libs

You can also install the Perl and Ruby dependencies independently:

# ./scripts/install-perl-modules
# gem install bundler && bundle install

Sequell has three primary functions:

1. Providing a repository for user-maintained content (the LearnDB).
2. Storing records of all games on public serves and making them available to query.
3. Serving a playlist of games enqueued for FooTV. This is one half of the configuration for FooTV. The FooTV service must separately be configured to connect to Sequell's playlist server.

Sequell also provides additional utility commands.

You configure Sequell by supplying an rc/sequell.rc in the directory from which you run Sequell. You can alternatively specify the rc filename as a command-line option with:

perl sequell.pl --rc=some/path/to/myweirdrc

If you want to test new commands or run !lg queries on a local Sequell database without involving IRC, you can use the scripts/runcmd.pl script for an interactive Sequell REPL with no IRC strings attached. It's a good idea to run it via rlwrap for command-line editing and history support:

$ rlwrap ./scripts/runcmd.pl
Sequell command runner
> !lg *
7941444. foo the Warrior (L19 MfGl of Okawaru), mangled by a naga ritualist (a +3 dagger of venom) on Snake:4 (snake_hunt) on 2017-10-22 18:04:42, with 217416 points after 31169 turns and 0:53:26.

runcmd.pl assumes a default IRC nick of anon, and a default IRC channel of #crawl, for commands that expect to see a nick/channel. You may override these defaults with the NICK/CHANNEL environment variables.

$ NICK=won CHANNEL='#crawl-dev' rlwrap ./scripts/runcmd.pl
> .echo $nick in $channel
Sequell command runner
won in #crawl-dev