Emacs Hangout #3: Emacs can read your mind

We’ve been organizing these Emacs Hangouts as an informal way for folks to get together and swap tips/notes/questions. You can find the previous Hangouts at http://sachachua.com/blog/tag/emacs-hangout/ . In this hangout, we shared tips on Emacs configuration, literate programming, remote access, autocompletion, and web development. And then Jonathan Arkell blew our minds with, well, his mind, demonstrating how he got Mindwave working with Emacs and Org Mode. The next one is scheduled for Jan 9, 2015 (Friday) at 7 PM Toronto time (12 AM GMT) – https://plus.google.com/events/cv3ub5ue6k3fluku7e2rfac161o . Want a different time? Feel free to set up an Emacs Hangout, or contact me ([email protected]) and we’ll coordinate something.

Approx. time Topic
0:08 describe-variable
0:12 cycle-spacing
0:14 quelpa, better-defaults
0:18 https://github.com/KMahoney/kpm-list
0:19 org-babel
0:24 noweb
0:27 Beamer, org-present
0:30 Emacsclient
0:32 TRAMP, vagrant, X11 forwarding, git
0:40 Evangelism, Emacs defensiveness
0:42 Code organization
0:47 Cask, Quelpa, el-get
0:54 paradox for listing packages
0:58 Helm, helm-git
1:02 Projectile
1:03 More helm, autocomplete
1:06 Autocomplete and company
1:16 Writing packages, flycheck
1:18 Moving to git, working on Emacs
1:22 Gnus, mu4e, notmuch
1:27 Eww, web browsing
1:28 Web dev tools: skewer-mode, slime, swank-js, web-mode
1:32 o-blog static site generator
1:38 orgaggregate
1:41 EEG data. Emacs can read your mind!

Chat, links:

me 8:07 PM Thanks!
Zachary Kanfer 8:10 PM A description of Emacs’s “describe variable” is here: Examining.html#Examining
JJ Asghar 8:11 PM zachary: thanks! wait wait wait, org-bable can take over your .emacs.d/*.el files?
me 8:18 PM JJ: Yeah, totally! It’s so useful.
JJ Asghar 8:19 PM i need to dig into that
Jacob MacDonald 8:19 PM https://github.com/KMahoney/kpm-list
jay abber 8:23 PM Org mode has functionality for LaTeX/TeX it appears Am I wrong, any ppl here using Emacs for ReST or LaTeX??
jay abber 8:27 PM it is
Jacob MacDonald 8:27 PM I used the PDF export in Org for notes in a math class, since it exports LaTeX nicely.
jay abber 8:27 PM https://www.cs.tufts.edu/~nr/noweb/
me 8:27 PM I’ve been using Org to export ta LaTeX for Beamer output
jay abber 8:27 PM np
jay abber 8:28 PM yeaaah up yup
Jonathan Arkell 8:29 PM Time for a restart.
jay abber 8:29 PM I think it would nice to know who uses emacs mainly graphically or in a terminal?? me = lurker sorry
jay abber 8:30 PM im trying to use it more in a terminal but always go graphic
Jacob MacDonald 8:31 PM emacs –daemon; emacsclient -c
jay abber 8:31 PM yosmiate yosmite me homebrew
jay abber 8:31 PM 24.4
jay abber 8:32 PM I like that
Christopher Done 8:32 PM audio sounds very trippy
jay abber 8:32 PM w/daft punk poster rockiin
Jonathan Arkell 8:33 PM heh! It’s signed too.
JJ Asghar 8:34 PM Sorry guys I have to go! Thanks so much for this!
me 8:34 PM See you!
jay abber 8:34 PM peace or vnc but thats alot of overhead make sure you lock down you sshdconfig files with sane sec practice Emacs over TMUX?????
Christopher Done 8:38 PM https://github.com/chrisdone/chrisdone-emacs/blob/master/packages/resmacro/resmacro.el unrelated, thought i’d share that =p
me 8:38 PM jay: Good suggestions. Want to speak up?
jay abber 8:38 PM lm lurking tonight
Jacob MacDonald 8:38 PM That audio .
jay abber 8:38 PM next one I promise His voice is awesome
Jacob MacDonald 8:40 PM http://www.emacswiki.org/Rudel
jay abber 8:40 PM Well for me sometimes I hate to confess but I just type vi/vim Noone I know uses any type of editor except word hahahaha
Jonathan Arkell 8:40 PM K, i am going to try audio again. Hopefully it will help Was that better?
jay abber 8:41 PM Can emacs do stuff like mpsyt or youtubedl somehow? yes!!!!
Jacob MacDonald 8:42 PM elisp interface to a shell script should work at a bare minimum.
Jacob MacDonald 8:42 PM I mean, there’s a web browser/mail reader/IRC client built in already…
me 8:42 PM I play MP3s in Emacs using emms and mplayer
jay abber 8:43 PM you know what
Jacob MacDonald 8:43 PM There was a Spotify plugin using dbus a while back, I believe.
jay abber 8:43 PM I think mysyt will be fine
Christopher Done 8:43 PM i was thinking of writing an emacs client to gmail via gmail’s API…
jay abber 8:43 PM its is a just a python script and mpv very suave and minimalist both python
Christopher Done 8:45 PM i stick all my own packages and ones i’m using in my repo https://github.com/chrisdone/chrisdone-emacs/tree/master/packages as submodules
me 8:45 PM Christopher: Gmail client might be nice. I use IMAP occasionally, but I miss the priority inbox.
Christopher Done 8:46 PM yeah. i used offlineimap for a while with notmuch.el, that was pretty good. but i’m tempted by the idea of a “light-weight” approach replacing the browser with emacs, requesting emails/search on demand. might be nice their API looked super trivial to work with
Jonathan Arkell 8:48 PM Sorry Yea Is qwelpa (sp?) native emacs? (elisp) Stupid mic. works great for music.
Jacob MacDonald 8:50 PM lol
Jonathan Arkell 8:50 PM I do all my configuration and packages in Org mode
Christopher Done 8:50 PM i just use git for everything =p
me 8:51 PM Jonathan: Oh, maybe you’re doing some kind of audio processing that removes noise or other odd things? </wild guess>
Jonathan Arkell 8:51 PM Ironically not. I am Launching my DAW now to try and sort it ot.. heh err out … not ot…
jay abber 8:53 PM M=x list-packages now installing org-mode
me 8:53 PM Jay: If you’re installing Org from package, be sure to do it in an Emacs that has not loaded an Org file. because Org 8 (package) and Org 7 (which is built into Emacs) have incompatibilities
jay abber 8:55 PM hmm i installed 24.4 via homebrew
Jonathan Arkell 8:58 PM Okay, I am switching to the built in mic, so hopefully it works. Let me know…
Zachary Kanfer 9:11 PM http://emacsnyc.org/videos.html#2014-05
me 9:12 PM https://github.com/aki2o/emacs-plsense ?
jay abber 9:15 PM Im trying to become a ninja using the shell from w/in Emacs but sometimes I have issues with my ENV and PATH
Jonathan Arkell 9:15 PM OS?
Jacob MacDonald 9:15 PM It’s a thing.
Zachary Kanfer 9:15 PM http://emacs.stackexchange.com/
jay abber 9:15 PM Yosmite like pyenv or rubyenv in HomeBrew yes yes
Jacob MacDonald 9:16 PM Depends on if you use emacs like from brew or Emacs.app.
jay abber 9:16 PM I got cha will find it
Jonathan Hill 9:17 PM great package for handling env variables in and so forth in OSX: exec-path-from-shell
jay abber 9:18 PM jonathan: thanks man
Jonathan Hill 9:18 PM just after (package-initialize), do (exec-path-from-initialize) oops (exec-path-from-shell-initialize)
jay abber 9:18 PM jh: ok
Jonathan Arkell 9:19 PM (setenv “PATH” (concat (getenv “HOME”) “/bin:” “/usr/local/bin:” (getenv “PATH”))) That’s waht i do… (add-to-list ‘exec-path “/usr/local/bin”)
me 9:21 PM http://lars.ingebrigtsen.no/2014/11/13/welcome-new-emacs-developers/
Jonathan Arkell 9:22 PM ERMERGERD +1 +1
Jacob MacDonald 9:32 PM Link please?
Bob Erb 9:33 PM What’s it called?
me 9:33 PM https://github.com/renard/o-blog ?
Jacob MacDonald 9:33 PM Thanks.
me 9:34 PM http://renard.github.io/o-blog/ – docs
jay abber 9:34 PM hey
jay abber 9:34 PM sorry I got side tracks I blog in my posts in REST for pelican static blog generator
jay abber 9:35 PM omg
me 9:35 PM Pretty!
jay abber 9:35 PM elisp for static blog oh know
John Wiegley 9:36 PM Hello
jay abber 9:36 PM https://github.com/renard/o-blog you should never shown that to me
Jacob MacDonald 9:37 PM John, somehow I think I’ve seen you before…
me 9:40 PM https://github.com/tbanel/orgaggregate
Jonathan Arkell 9:44 PM https://github.com/jonnay/mindwave-emacs
jay abber 9:44 PM Hey I have to go now
John Wiegley 9:44 PM Bye Jay
me 9:44 PM See you! Thanks for joining!
jay abber 9:44 PM This was awesome I will be on the next one I have to study precalc
me 9:44 PM Yay!
jay abber 9:45 PM take care
me 9:49 PM Oooh… I wonder how to make coloured graphs like that too. Neat! I should practise using overlays…
Jonathan Arkell 9:53 PM https://github.com/jonnay/mindwave-emacs Here is the Display Code: https://github.com/jonnay/mindwave-emacs/blob/master/mindwave-display.org So wait… C-u C-u C-p takes you… uup?
me 9:59 PM Hah! UUP! Brilliant!
Bob Erb 10:01 PM You’re a treasure, Sacha!
  • Kyle

    Here’s the new awesome way of switching windows Ive been using: https://github.com/dimitri/switch-window

  • P Stark

    Hi Sacha, I love these Emacs hangouts. One little thing: I think the youtube time annotations should be _h__m, not _h__s. (e.g: 1h02m, not 1h02s.)

    • Whoops, thanks! Fixed!

  • dgutov

    There’s this thingy for Perl: https://github.com/aki2o/plsense/

    Never tried it (not a Perl programmer).

    • Yup, that’s what a Google search turned up during our chat. Haven’t tried it either, but it looks cool.

  • Where are these hangout announced?

    • I have a public Google calendar (see http://sachachua.com/blog/2014/10/emacs-hangout-notes/ for the embed) and the events show up in Google+’s stream, but I should probably sort out a better announcement system. What would be convenient for you? A mailing list? A webpage?

      • Just added it, thanks.

        My personal preference is a mailing list.

  • J M

    I haven’t watched the whole thing, so disregard this if it’s already been mentioned, but there’s an easier way to run babel commands remotely: Just set “:dir” header argument to a remote TRAMP directory!

    For example:
    #+BEGIN_SRC sh :dir /[email protected]:
    ls
    #+END_SRC

    You can also make this header default for all code blocks in a subtree as follows:

    * Snippets for remote commands

    :PROPERTIES:
    :dir: /[email protected]:
    :END:

    #+BEGIN_SRC sh
    ls
    #+END_SRC

    #+BEGIN_SRC sh
    echo “I’m running on $(hostname)!”
    #+END_SRC

    Of course, this is easiest to use if you use key based authentication rather than passwords, otherwise you’d have to enter the password on every execution.

    See more here: http://orgmode.org/manual/dir.html#dir

    • J M: Ooooh, that *is* really cool. Thanks for sharing!

  • I’m bummed that I missed this one. :/ (company party was rescheduled to coincide). But I watched the recording last night. Cool stuff! The remote Babel thing is a really neat idea. And Jonathan’s work with Mindwave is exciting too. I’m very interested in alternative input devices for controlling Emacs (though I’ve only done a bit of dabbling). Perhaps `mind-control.el` is not so far off as one might have thought. ;)

    • Cameron: Looking forward to hearing from you at the next one! =)