smoser

example go test wrapping or replacing shell tests in tw

tw has a 'gem-check' test.

The test is shell code that invokes ruby and looks at output.

I think we can use the functionality in 'go test' to replace a lot of the "shell test infrastructure".

'gem_test.go' here replaces the --require= functionality in seen there in gem-check.

smoser

usrmerge tool

This is function for a usrMerge tool.

The goal is to call usrSbinMergeRoot with a target directory and it should apply a usrSbinMerge to the contents of that directory.

Plan to utilize

The plan for making usrMerge in wolfi was:

1. setup things such that this tool can be called from a pipeline

smoser

virtio serial information that I know

I played with virtio-serial today and don't want to lose the information that I had.

Here is an example of booting with multiple

   -chardev socket,wait=off,id=mychardev0,server=on,path=/tmp/.sock0
   -chardev socket,wait=off,id=mychardev1,server=on,path=/tmp/.sock1
   -device virtio-serial-pci
 -device virtserialport,name=smoser0,chardev=mychardev1

smoser

Share your screen in a browser witih tmux and gotty

Gotty is really nice, allowing you to share your terminal in a browser.

I had never wanted to do that until I realized that the only thing I ever share in a video conference is:

1. terminal
2. browser window.

I don't share my whole screen, because I don't want you seeing the notifications of new cat videos on youtube and you probably would not appreciate the full 4880x2560 screen.

smoser

editing melange yaml with python

Sometimes its helpful to edit lots of melange files quickly.

This is something that I used to do that.

notes

• uses ruamel.yaml this is pretty good. I have seen one case where messed up roundtrip (py3-botocore.yaml)
• running 'yam' afterwards fixed up more of the small differences with indentation.
• see also https://github.com/dannf/py-melange-yaml

smoser

chainctl token helper

This little helper just wraps calls to chainctl auth and reads token ttls.

On my workstation, I call it from ~/.profile like this:

is_interactive() {
    [ -t 0 ] && [ -t 1 ]
}

smoser

Random wolfi and tools.

• get-archive-info - get a tar tvf output and the .APKINFO for every file in the archive.

• build-stage - throw a bunch of files and see which build. they do not depend on each other (each only builds with the wolfi repo)

  I used this to help create batches of things when changing lots of files.

• test-installable - its like the c-i test that checks that all packages

smoser

find shell deps

The idea here is just to "parse" files to

1. see if they are shell
2. find the external commands/utilities that they use

A more advanced version of this would help identify dependencies.

there are bugs in the fs traversal and I'm not finding everything :-(.

example

smoser

get-sbom and sbom-to-manifest

Just a friendly wrapper for getting the sbom for an image.

$ ./get-sbom cgr.dev/chainguard/busybox:latest | ./sbom-to-manifest
alpine-baselayout-data	3.6.5-r0
alpine-keys	2.4-r1
alpine-release	3.20.0-r0
busybox	1.36.1-r29
ca-certificates-bundle	20240226-r0

smoser

boot a tarball or oci imag ref

Get yourself a kernel

# kernel from vmlinuz on ubuntu
kdist=/boot/$(uname -r)
# https://bugs.launchpad.net/ubuntu/+source/linux/+bug/759725
sudo cat "$kdist" > kernel

Now convert a oci or local tarball to kernel flavor cpio. this script adds a very basic 'init'