Go on Miek Gieben

PAM unixsock

Fri, 14 Mar 2025 12:14:47 +0100

Ever felt the need to do something with PAM, like implementing 2FA in SSH? You are left with a few bad choices, among others you’ll need to write something (complex) in C. I rather not do that, so I’ve created pam-unixsock.

This is tiny, the most trouble I had with concatenating strings with a space in between, because, you know, C. Anyway tiny. It doesn’t do much and gets you into another language quickly!

Format Go HTML templates

Wed, 19 Feb 2025 15:20:33 +0100

Because I was fed up with the lack of options (none), I write a tool that can format Go HTML templates: you can find it here. Includes screenshots!

Formatting Go text templates is pure madness, but the above code works well on HTML templates. If have find issues or need more functionality open a PR against the repo.

Have this in neovim:

au FileType gohtmltmpl command! Fmt silent %!gotmplfmt
au FileType gohtmltmpl let &l:formatprg="gotmplfmt"

Update 2025-05-31

In my new neovim setup (with conform.lua) I have this:

Kong Go CLI manual pages

Fri, 08 Nov 2024 11:38:55 +0100

I’m using Kong the CLI argument parser to create manual pages from the arguments and help described in the Kong structure that tells your CLI how to parse its command line.

With a lot of use from the reflect package (this was before I discovered kong actually has an API you can use), I’m creating manual pages from the kong CLI definition, while having great fun with parsing enum, default and other tags to make the manual page really readable.

Kong Go CLI

Fri, 01 Nov 2024 11:38:55 +0100

I’m a fan of Kong the CLI argument parser, I use it to automatically create manual pages, (bash) completion and do a lot of validation inside it. (This guy also has other really interesting packages, and he’s a huge fan of Go’s struct tags).

I wanted to do validation inside Kong as well, for this Kong has validation, which is just a method (Validate() error) on a type. Now most types I have are just string or any other builtin type. For validation to work, all these types must be re-typed to another type on which the method can be applied, which is annoying. I wanted a better way…

eBPF in Go

Thu, 22 Aug 2024 18:46:57 +0200

What if I could program eBPF in pure Go? I want to use eBPF and lots of current tooling exist, but I like Go. I don’t want to use clang to create the ELF binary that then gets loaded into the Linux kernel. I want to use Go to create that ELF file. The heavy lifting of loading and inspecting can be done via bpftool (although I’m aware that Go programs exist that do this), but bpftool looks like the standard way of interacting with the kernel’s eBPF subsystem.