rootfs: Add option to install local debs

Update README to document the option.

Signed-off-by: Loïc Minier <[email protected]>

Author: lool

README.md

@@ -45,8 +45,9 @@ debos --fakemachine-backend qemu --memory 1GiB --scratchsize 4GiB debos-recipes/
 ### Build options
 
 A few options are provided in the debos recipes; for the root filesystem recipe:
-- experimentalkernel: update the linux kernel to the version from experimental; default: don't update the kernel
-- xfcedesktop: install a Xfce desktop environment; default: console only environment
+- `experimentalkernel`: update the linux kernel to the version from experimental; default: don't update the kernel
+- `localdebs`: path to a directory with local deb packages to install (NB: debos expects relative pathnames)
+- `xfcedesktop`: install a Xfce desktop environment; default: console only environment
 
 For the image recipe:
 - dtb: override the firmware provided device tree with one from the linux kernel, e.g. `qcom/qcs6490-rb3gen2.dtb`; default: don't override

debos-recipes/qualcomm-linux-debian-rootfs.yaml

@@ -1,5 +1,6 @@
 {{- $xfcedesktop := or .xfcedesktop "false" }}
 {{- $experimentalkernel := or .experimentalkernel "false" }}
+{{- $localdebs := or .localdebs "none" }}
 
 architecture: arm64
 
@@ -190,6 +191,20 @@ actions:
           /etc/apt/sources.list.d/debian-experimental.sources
 {{- end }}
 
+{{- if ne $localdebs "none" }}
+  - action: overlay
+    description: Overlay local debs directory {{ $localdebs }} to /root/
+    source: {{ $localdebs }}
+    destination: /root/
+
+  - action: run
+    description: Install local debs from /root/
+    chroot: yes
+    command: |
+      set -eux
+      apt -i install /root/*.deb
+{{- end }}
+
   - action: run
     description: Create DTBs tarball
     chroot: false