Initial ERC configuration for Emacs (IRC)
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#+TITLE: Mike Gerwitz's Emacs Mail Configuration
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#+AUTHOR: Mike Gerwitz
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#+EMAIL: mtg@gnu.org
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I used to be a user of [[http://irssi.org/][irssi]], which is a damn good IRC client. But now that
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I'm using Emacs for many other things---including [[file:mail.org][e-mail]]---I am comfortable
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exploring it for other uses.
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Emacs is an ideal platform for many things because of the flexibility that
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Elisp provides---being able to hook and modify anything at runtime. For
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IRC, I'm giving [[https://www.gnu.org/software/emacs/manual/html_node/erc/index.html][ERC]] a try, which is distributed with Emacs.
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Unfortunately, I began this transition after I had already been away from
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IRC (and therefore irssi) for a few years, so I won't be drawing many
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parallels. Feel free to submit patches to this documentation.
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You can find me on Freenode, user =mikegerwitz=.
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As always with my code, I use lexical variable binding:
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#+BEGIN_SRC emacs-lisp :padline no
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;; -*- lexical-binding: t -*-
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#+END_SRC
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* User Information
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I am =mikegerwitz= on any service I use.[fn:: (unless I forgot my password
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and can't recover the account...e.g. Reddit, on which I'm =mgerwitz=)]
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#+BEGIN_SRC emacs-lisp
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(setq erc-nick "mikegerwitz"
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erc-email-userid "mtg@gnu.org"
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erc-user-full-name "Mike Gerwitz")
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#+END_SRC
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* Auto-Join
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The =join= module distributed (and enabled by default) with Emacs can
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auto-join channels on start.o
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#+BEGIN_SRC emacs-lisp
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(erc-autojoin-mode t)
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(setq erc-autojoin-channels-alist
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'(("freenode.net" "#fsf" "#fsf-members" "#gnu" "#libreplanet")))
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#+END_SRC
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Interestingly, this works even though I proxy to Freenode through a
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=fencepost= SSH tunnel[fn:fencepost-tunnel], connecting to =localhost=; it
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properly detects the server name.[fn:server-name]
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* Tracking
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ERC can use the modeline to notify the user [[http://www.emacswiki.org/emacs/ErcChannelTracking][when channels/queries have
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activity]]. This is absolutely necessary---channel and query buffers can
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easily be hidden, either intentionally or accidentally.
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#+BEGIN_SRC emacs-lisp
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(erc-track-mode t)
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#+END_SRC
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The default positioning in the modeline is before the list of modes:
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#+BEGIN_SRC emacs-lisp
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(setq erc-track-position-in-mode-line 'before-modes)
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#+END_SRC
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I have a wide terminal, so I can also benefit from knowing how many
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messages I've missed, mixed into a delicious [[www.catb.org/jargon/html/A/angry-fruit-salad.html][angry fruit salad]]:
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#+BEGIN_SRC emacs-lisp
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(setq erc-track-showcount t
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erc-track-use-faces t)
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#+END_SRC
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The rooms I participate in are generally large, so it is not useful for me
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to be notified of =JOIN=, =PART=, etc. Below, =333= and =353= (present in
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the default) represent, respectively, notice of who set the channel topic
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and the user listing.
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#+BEGIN_SRC emacs-lisp
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(setq erc-track-exclude-types
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'("NICK" "JOIN" "PART" "QUIT" "333" "353"))
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#+END_SRC
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It is easy to ignore messages from the server by setting
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=erc-track-exclude-server-buffer=, but I would like to be notified.
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[fn:fencepost-tunnel] The =fencepost= proxy (a GNU server) is for privacy
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and GNU recognition---Freenode states that it spoofs the IP Address, and it
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provides a cloak in the form of =gateway/shell/gnu/x-*=. Other GNU hackers
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on =fencepost= would be able to see my real IP (unless I =torify= it), but
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that's okay. I used to have an FSF cloak until my Freenode account expired,
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but I find this to be more appropriate.
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[fn:server-name] =erc-autojoin-after-ident= in =er-join.el= considers
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both =erc-server-announced-name= and =erc-session-server=, with the former
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taking precedence. In my case, the former is ="foo.freenode.net"= (varies),
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and the latter is ="localhost"=.
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* Flood Protection
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/Flooding/ occurs when too much text is send to a channel. Some channels
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protect against this, some don't. The issue I am more concerned with is
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whether flooding from myself is actually intentional.
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For example, I have a lot going on in my terminal (everything except
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graphical web browsing), and I will occasionally paste text into the wrong
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buffer/window, or I will simply paste when that was not the intent (fat
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fingers; mouse middle-click). I have also had situations in the past where
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my children get to the mouse or keyboard.[fn:kids-paste]
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ERC offers an "accidental paste threshold" that will signal an error if
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lines are entered within N seconds of one-another. I set this to a
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threshold that I think will be reasonable, and one that will definitely be
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reached on paste.
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#+BEGIN_SRC emacs-lisp
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(setq erc-accidental-paste-threshold-seconds 1)
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#+END_SRC
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[fn:kids-paste] One incident was my son---one year old at the time---playing
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with the mouse that had fallen under my desk. He caused a bunch of text in
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the terminal to be selected, and then subsequently pasted into an IRC
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channel.
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