From 295493e65ebc3c5f8a4f7c5c402d693fbd8a93ca Mon Sep 17 00:00:00 2001
From: Timothée Ravier <tim@siosm.fr>
Date: Mar 19 2025 19:45:45 +0000
Subject: common: Add common top level directories


Add some common top level directories that users can not easily add
anymore now that we are using composefs. This adds `/nix` and `/snap`.

Another option would be to use the transient-root support in ostree, but
that option is not yet configurable via a kernel command line argument.

See: https://gitlab.com/fedora/bootc/tracker/-/issues/26
See: https://github.com/ublue-os/main/issues/711
See: https://bootc-dev.github.io/bootc/filesystem.html#enabling-transient-root
See: https://github.com/projectatomic/rpm-ostree/issues/233

---

diff --git a/common.yaml b/common.yaml
index 779d2d4..b336334 100644
--- a/common.yaml
+++ b/common.yaml
@@ -25,6 +25,8 @@ include:
   - kernel-install.yaml
   # Enable composefs
   - composefs.yaml
+  # Add some top level directories
+  - top-level-dirs.yaml
 
 arch-include:
   x86_64:
diff --git a/top-level-dirs.yaml b/top-level-dirs.yaml
new file mode 100644
index 0000000..0e9e079
--- /dev/null
+++ b/top-level-dirs.yaml
@@ -0,0 +1,9 @@
+# Add some common top level directories that folks can not easily add anymore
+# now that we are using composefs
+
+postprocess:
+  - |
+    #!/bin/bash
+    set -xeuo pipefail
+
+    install -d -m 0755 /nix /snap