Content tagged lisp

rlwrapping sbcl

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SBCL is an excellent lisp implementation. The only thing that's not so nice about it is overly simple command-line interface. The absence of <UP>, C-a, M-b, etc. can be annoying, even though I only occasionally use SBCL directly.

I have 3 solutions to this problem now:

  • Use SLIME, which is what I do most of the time, but sometimes this isn't practical.

  • Use Linedit. I tried this, and it was cool. But somehow I broke it and now I can't get it to work.

  • Use rlwrap. This requires you to either always invoke SBCL as rlwrap sbcl or create an alias for it. This works very well too, is very simple and doesn't noticeably increase start-up time.

Some quick git diff tips

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A couple of quick tips. As you possibly know you can specify some options to be used for diffs (and other things) per file type. The one I'm interested in is the function name.

For org-mode

The primary way of identifying which part of an org-mode document a change occurs in seems to me to be the heading. So, in your $HOME/.gitconfig put:

[diff "org"]
      xfuncname = "^\\*+.*"

Which should show any lines starting with one or more * characters. And then in $XDG_CONFIG_HOME/git/attributes or $HOME/.config/git/attributes put:

,*.org   diff=org

For lisp and lisp-like langauges

For anything that resembles lisp (so Common Lisp, Emacs Lisp, Hy, scheme, etc.) I would think that the easiest thing to do is just see the closes top-level form. So, in your $HOME/.gitconfig put:

[diff "lisp"]
      xfuncname = "^\\([^ ]+ [^ ]+"

Which should show the opening parenthesis and the first two words. For example:

(defun some-function-name
(defclass my-awesome-class
(define-route this-strange-route

And then put in your $XDG_CONFIG_HOME/git/attributes or $HOME/.config/git/attributes:

,*.lisp  diff=lisp
,*.el    diff=lisp
,*.hy    diff=lisp
,*.scm   diff=lisp

And possibly any other lisp-like language files you can think of.


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I have just returned from an excursion into the land of exherbo, which is an awesome source-based distro, and I found that while I was gone, something changed that made stumpwm cause a segmentation fault in X11 a few seconds after starting up.

I have tried everything I can think of to get it running again, but alas, to no avail. So I started looking at alternatives again. Feeling a little crazy I decided to give notion another try. And it fits strangely well.

It's configured/extended in lua, which I'm not particularly fond of, and it has a (in my opinion) crazy default configuration. But it also allows Emacs-like key combinations out-of-the-box, which is a very big plus in my book. So the quest to bring it closer to my stumpwm setup has begun.

Window layout

One of the nicest additions to my stumpwm configuration I made in the last few weeks was a loaded window configuration which put my Emacs frames in a big chunk of my left monitor, my terminals on my left monitor with just enough space for 80 columns and my web browser filling my right screen. I had also set-up some rules to always place them in the correct spots.

I have not yet tried to automatically place the windows in the right spots, but I do have the proportions right. I just had to delete the right frames and resize the one for terminals and, by default, notion remembers this set-up and automatically restores it when I log in.

I will look at creating a special layout for this so I don't have to worry about (accidentally) changing things.


I found this interesting page about run-or-raise-like functionality for Ion3, which notion is a fork of. This is a little outdated, though, since notion has changed (apparently) the workings of some functions and lua 5.2 introduced the goto keyword, so I had to change it to this:

function oni_match_class(class)
   local result = {}
      function (win)
         if class `` win:get_ident().class then
            table.insert(result, win)
            return false
         return true
   return result

function xsteve_run_byclass(prog, class)
   local win = oni_match_class(class)[1]
   if win then

There is no function to get a list of all the client windows, only a function to iterate over them. For the moment I am only interested in finding the first window with class CLASS, so I return false when a match is found, this stops the iteration process. I also had to use the WRegion.goto_ function, instead of WRegion.goto because of the mentioned change in lua 5.2, but they are the same.

I then only have to bind it:

defbindings("WScreen", {
    -- ...
    submap("Control+Z", {
        -- ...
        kpress("E", "xsteve_run_byclass('emacsclient -ca emacs', 'Emacs')"),
        kpress("W", "xsteve_run_byclass('conkeror', 'Conkeror')"),
        kpress("C", "xsteve_run_byclass('urxvt', 'URxvt')"),

Quoting C-z

One of the coolest things about using a prefix in stumpwm that I have been able to find in precious few other solutions is the ability to send the prefix key to the applications you use, so you don't entirely miss its functionality. In stumpwm this is easy, but in notion its a little more work:

defbindings("WClientWin", {
    -- ...
    submap("Control+Z", {
        -- ...
        kpress("Q", "WClientWin.quote_next(_)"),

This means that I have to type C-z q C-z to send the C-z key to, for instance, Emacs. That a few more keys than I was used to in stumpwm, but at least it's possible.

CLark 0.1.0

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A few days ago I tagged CLark 0.1.0.

CLark is a Common Lisp rewrite of my Markam project, which in turn was a Chicken Scheme rewrite of linkwave. With each rewrite I come a step closer to having the program that I need. Linkwave could only store bookmarks, Markam could also search through them and had a conkeror interface which allowed adding and searching through bookmarks. Now CLark expands upon this by allowing users to edit their bookmark's information, changing the tags, removing bookmarks, writing their own commands, an improved command-line interface and bookmark status checking (bookmarked or not). It also adds commands to conkeror for the data manipulation commands that are new (edit, set-tags, remove) and a mode-line indicator of bookmarked status.

For now it only targets SBCL, but I'm not averse to including others.

The next big step should be adding a mcclim-based GUI for those crazy people who don't like to use the command line.

This blog covers archlinux, avandu, avandu-lua, cask, ci, clark, common-lisp, config, conkeror, diff, dispass, dispass.el, editors, elisp, emacs, eshell, evil, exherbo, experiments, file-synchronization, games, git, github, gnus, hla, html, javascript, lisp, lua, markam, meta, mpd, notion, org-mode, ox-coleslaw, projects, rc, sbcl, small-recent-posts, software, stumpwm, systemd, tasks, tekuti, testing, tips, todo, ttrss, utility, vagrant, vc, vim, visual, wdocker docker docker-compose, wm, wordpress, yoshi-theme

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