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Linsomniac's Articles

Linsomniac's Articles


Sean Reifschneider's writing on random issues

Framework for Securities to trade on the blockchain

   |  Sean Reifschneider

Last week was a busy week for cryptocurrencies. I haven’t seen this covered in the mainstream news, but it looks like frameworks are being put in place for securities to begin trading on the blockchain.

[Read More]
News  Securities  Blockchain 

Shell quoting for bash wrappers

Bash 4.4 reduces quoting/escaping hell

   |  Sean Reifschneider

TIL ${*@Q} helps with quoting/escaping hell.

[Read More]
bash  wrapper 

Building and Publishing Apt Repos to Github Pages

Download, package, and publish software as a apt repo on Github Pages

   |  Sean Reifschneider

uv is becoming really useful, but I noticed there is no apt repo/PPA of it. I decided I wanted to try publishing an apt package repository via Github Pages. The LLMs got me started, but there were a lot of little things to work out, so here’s a complete recipe.

[Read More]
github  apt  deb  packaging 

Docker Apt Install for Python+UV

A Proposal for Hynek's Docker Recipe

   |  Sean Reifschneider

While reviewing Hynek’s awesome “Production-ready Python Docker Containers with uv” article, I made some changes to the final container. Here’s my proposal for changes.

[Read More]
Python  Docker  uv 

ElasticSearch Snapshots to Backblaze B2

Configuring Elasticsearch to write snapshots to Backblaze B2"

   |  Sean Reifschneider

An important part of setting up an Elasticsearch cluster is to configure snapshots. I recently set up snapshots to Backblaze B2, an affordable alternative to AWS S3. This is a complete example of configuring them.

[Read More]
Elasticsearch  Backups  Snapshots  Backblaze B2 

ChatGPT 4 vs. Claude

   |  Sean Reifschneider

Above the fold content

[Read More]
AI  ClatGPT  Claude 

Deep nesting vs Magic

Which of these two code chunks is better

   |  Sean Reifschneider

I had a piece of code that was deeply nested for loops, and I wanted to see what it could look like if it wasn’t deeply nested. Deep nesting is the root of all evil, you know. Which is the most clear, maintainable code?

[Read More]
Python  Refactoring 

Python Testing a CLI Script Without .py

How to import a module without .py suffix

   |  Sean Reifschneider

I often write little CLI programs in Python, where I just want to call it “script” rather than “script.py”. I also want to be able to test functions in these scripts. It gets tricky if you want to test code from a file without a “.py” suffix.

[Read More]
Python  Testing 

Understanding Headscale ACLs and Users

   |  Sean Reifschneider

I spent quite a bit of time while I was learning Headscale being confused about users. Here are some key points that helped me understand them.

[Read More]
Headscale  Tailscale  ACLs 

Using jq to help remove headscale nodes by name

   |  Sean Reifschneider

Headscale CLI requires that you remove a node by id rather than name. jq to the rescue!

[Read More]
Headscale  jq 
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