rdr8 / anarki

Community-managed fork of the Arc dialect of Lisp; for commit privileges submit a pull request.

Anarki

Anarki: a publicly modifiable 'wiki-like' fork of Arc Lisp (http://www.paulgraham.com/arc.html)

The intention is to be extremely permissive in accepting patches. For commit privileges, just submit your first pull request or ask on http://arclanguage.org/forum.

Installation

Warning: If you are already running a HN-like site, migrating to this fork might mess up your site's data. Come talk to us first, and be sure to make a backup before the migration.

To run, install Racket (v6.8 or later) from http://racket-lang.org, then:

$ git clone http://github.com/arclanguage/anarki
$ cd anarki
$ ./arc.sh  # interactive repl
arc> (quit)
$

Tests:

Anarki has thorough automated tests. To run them, install Mercurial, then:

# start in the anarki directory
$ hg clone https://bitbucket.org/zck/unit-test.arc
$ ./arc.sh
arc> (load "tests.arc")

Anarki is explicitly not constrained to maintain compatibility with upstream releases, and compatibility status may swing wildly from commit to commit depending on who takes an interest. To see a list of what's different, type (incompatibilities) at the repl. If you make an incompatible change, please update this list.

If you run into trouble: http://sites.google.com/site/arclanguagewiki; http://arclanguage.org/forum

Documentation

https://arclanguage.github.io/ref/

Racket interop

Racket expressions can be evaluated with the ($ ...) syntax. For instance, (($ crypto-random-bytes) 16) obtains the crypto-random-bytes function from Racket and makes a call to it.

If you write lots of Racket code and you just want to use Anarki for part of a bigger project, you can raco pkg install anarki and use Anarki to write Racket modules:

#lang anarki
(:provide function-for-use-in-racket)

(= racket-import ($.dynamic-require ...))
(load "relative/path.arc")

(def utility-for-use-in-racket (x)
  (* x (racket-import x))

Note that Anarki does not have private module scopes; the (:provide ...) section is just there to make it easy to require an Anarki-based library from Racket.

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Hacker News Site

Anarki comes bundled with a Hacker News style app. To run the HN server, first pick your (the admin's) username:

$ mkdir www
$ echo __username__ > www/admins

You can have multiple admins. Add them all to www/admins, separated by whitespace.

By clicking on the domain name of a submitted link admins may tag the domain. The color of a domain name indicates its tag:

• gray default
• darkred ignore
• darkblue kill

The HN server will use the openssl command. If you're on Windows, first install OpenSSL and make sure it's on your PATH. Other systems should be distributed with OpenSSL already.

Now bring up the server:

$ ./run-news

There'll be a pause while the server loads up, with some messages, then you'll see the 'arc> ' prompt.

Go to http://localhost:8080. Click on login, and create the account for your username. You should now be logged in as an admin.

Don't worry about "user break" or "error writing" messages.

To customize News, change the variables at the top of lib/news.arc. To change the port your server runs at, modify lib/run-news.arc.

Any interactive changes to the prompt will be reflected immediately in the server, without needing to restart it. Don't forget to add them to the .arc files as appropriate, otherwise they'll be lost when you stop the server or it dies for some reason.