jandubois

APFS In-Place UID/GID Patching: Implementation Plan

Goal

Write a minimal APFS tool (pkg/apfs/chown.go) that modifies file ownership (UID/GID) directly on a raw APFS disk image, bypassing the kernel VFS. This eliminates the sudo chown root:wheel requirement from macOS guest disk patching.

Why this works

jandubois

Idiomatic Go Programming Guide 2025+ - Gold Standard Edition

"Go is about making software engineering more effective, not just making programmers more productive." - The Go Team

Target Go Version: Go 1.24+ (Latest Stable: Go 1.24.5 released July 8, 2025 - Go 1.25 expected August 2025)

---

Executive Summary

jandubois

---
apiVersion: helm.cattle.io/v1
kind: HelmChart
metadata:
  name: fleet-crd
  namespace: kube-system
spec:
  repo: https://rancher.github.io/fleet-helm-charts/
  chart: fleet-crd
  targetNamespace: cattle-fleet-system

jandubois

FROM ubuntu:16.04

# Don't run mesg unless we have a tty; otherwise we'll get a warning from `docker run ... bash -l -c ...`
RUN perl -i -pe 's/mesg n/tty -s && mesg n/' /root/.profile

# Install packages for building ruby
RUN apt-get update
RUN apt-get install -y --force-yes \
    build-essential curl git sudo zlib1g-dev libssl-dev libreadline-dev libyaml-dev libxml2-dev libxslt-dev unzip vim

jandubois

#!/usr/bin/env perl
use strict;
use warnings;

# Shorten video by limiting the max wait time
my $max_pause = 1;

# To make interactive commands more noticable, insert a longer delay
# after lines with a command prompt.
my $prompt = qr/jan\@zuze/;

jandubois

$ cat .buildpacks
nodejs_buildpack
php_buildpack

$ cf push multi
Starting app multi in org hpe / space myspace as admin...
[...]
Staging...
=====> Locating Admin Buildpack: nodejs_buildpack
=====> Detected Framework: node.js 1.5.8