grimsleydl

There is an interesting question on reddit: “Why [are there] so many loop variations in CL?”[fn:12]. The OP mentions that he/she is looking for something comparable to Python’s for-loop and list comprehension; or maybe something similar to the dash.el Elisp library.

As an exercise, I want to achieve what Python and dash.el can do in Common Lisp. Then, in the end, I will try coming up with something that Python and dash.el cannot do with Common Lisp.

I’ll be comparing to dash.el[fn:13] version 2.18.1. You are advise to read the following exercises with the dash.el info file opened.

[fn:12] https://old.reddit.com/r/lisp/comments/lzt9yk/why_so_many_loop_variations_in_cl/

[fn:13] https://github.com/magnars/dash.el

Nix vs Guix

These are notes to the stream: https://youtu.be/S9V-pcTrdL8

Some notes

We are not aware of a lot of GNU software available to us.
Seems that Guix more hacker-friendly/explorable.

General comparsion

Description

Nix

Guix

Comment

To rename your Git master branch to main, you must do the following steps:

Navigate to your repository in the command line and issue the following commands: - git branch -m master main - git push -u origin main
Change your default branch on GitHub by going to your GitHub repository in your browser, and navigate to Settings > Branches and click on the dropdown and switch from master to main and click Update (this will only show if you have two or more branches). The main branch is now your default branch.
Update the tracking of the branch from your command line with the following command: - git branch -u origin/main main

Server

iptables -A FORWARD -i wg0 -o YOUR_INTERFACE -s 10.200.200.0/24 -j ACCEPT
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -t nat -A POSTROUTING -o YOUR_INTERFACE -s 10.200.200.0/24 -j MASQUERADE

systemd-networkd

see vpn.netdev and vpn.network.

Quick libvirt pcs lab setup

To keep things simple, I'm using my local fedora 29 install with libvirt. We will also use virtualbmc to act as an ipmi interface to allow stonith with pcs. For a quicker install, I'm just using a cloud image of Centos7 with a manual configdrive iso for each vm. We will use a couple of VMs for the cluster and a 3rd for the iscsi server. I have recently found myself dealing with OSP13 which uses PCS and ISCSI, so it will be a refresher for me as well as its been a few years.

Yes we could script and/or ansible all of this shit out, but this is a learning exercise.

Official site (kparc.com)

Summary
Example programs
Updated (?) edit.k
~2014 older version that has more info
The project has been running since at least 2012

Articles

Global public configs for multiple utils. Makes use of tangled files.
C-c C-v t to export all.

	client = yes
	debug = 5
	foreground = yes
	pid = /var/tmp/stunnel-client.pid
	cert= st.pem

	[Application]
	accept = 1081
	connect = 3000

	## TL;DR

	setopt extendedglob
	ls *(<tab> # to get help regarding globbing
	rm ../debianpackage(.) # remove files only
	ls -d *(/) # list directories only
	ls /etc/*(@) # list symlinks only
	ls -l *.(png\|jpg\|gif) # list pictures only
	ls () # list executables only
	ls /etc/**/zsh # which directories contain 'zsh'?

	[Unit]
	# Usage: systemctl enable --now duperemove-weekly@$(systemd-escape <path>).timer
	# Utilize %J specifier for duration set.
	# One can hardlink/copy with 'weekly' part changed
	# to set other duration.
	Description=Deduplicate %I at calendar event (%J)
	After=local-fs.target
	Requires=local-fs.target
	Conflicts=shutdown.target rescue.target rescue.service emergency.service