feat: Add akmods module (#89)

* feat: Add kmods installer module

Credits: @c0deplayer

This is not ideal as it does not support custom kernels & it involves editing Containerfile.

I believe there is no other way but to make users edit Containerfile for those files to be even pulled of.

I would like this to be through the recipe only, so I will put this as a draft until some better ideas come.

* Rename kmods installer to akmods

* Update README

Address: 

blue-build/legacy-template#212 (comment)

#89 (comment)

* Fix README typo

* Remove non-needed space for yml in README

* Add support for Surface & Asus images

* Clarify tagged base image warning better

* Clarify tagged base image warning better pt.2

* There is no need to fetch main-nvidia build for now

* Use simpler =~ for conditioning instead of grep & sed

This finally fixes akmods module

* Install kernel-devel-matched for all builds

* Assure that Surface installs their version of kernel-devel-matched

* Mention that framework images can be used as a base

* Delete duplicate warning message

* Remove non-needed explanation on why only Universal Blue builds are supported

* Clarify 1st warning better

* Clarify `main` akmods compatibility better

This would avoid editing README if some other compatible image gets announced or discontinued.

* docs(akmods): grammar fixes

* docs: add link to akmod tag matrix

---------

Co-authored-by: xyny <[email protected]>

modules/akmods/README.md

@@ -0,0 +1,40 @@
+> [!WARNING]  
+> Only Universal Blue based images are officially supported.
+
+> [!WARNING]  
+> Universal Blue builds with Fedora 38 & below are not supported.
+
+> [!WARNING]  
+> Custom kernels are not supported.
+
+# `akmods` Module for Startingpoint
+
+The `akmods` module is a tool used for managing and installing kernel modules. It simplifies the installation of kernel modules, improving the capabilities of your system.
+
+List of all available kernel modules & versions/tags are here:
+https://github.com/ublue-os/akmods
+
+Ublue-os-akmods-addons & ublue-os-nvidia-addons are already included when necessary, so they are not needed to install.
+
+To use the `akmods` module, specify the kernel modules you wish to install in the `install:` section of your recipe/configuration file.
+
+## Example configuration
+```yaml
+type: akmods
+install:
+    - openrazer
+    - openrgb
+    - v4l2loopback
+    - winesync
+```
+ 
+By default, the `akmods` module installs the `main` akmods for `latest` version of Fedora.
+`main` akmods are also compatible with other images except `surface(-nvidia)` & `asus(-nvidia)`.
+
+If you want to install akmods for `surface(-nvidia)` or `asus(-nvidia)` images, or for `older version of Fedora`, change this part in the Containerfile:
+See available tags here: https://github.com/ublue-os/akmods/#how-its-organized
+
+```
+# Change this if you want different version/tag of akmods.
+COPY --from=ghcr.io/ublue-os/akmods:main-39 /rpms /tmp/rpms
+```

modules/akmods/akmods.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -oue pipefail
+
+BASED_IMAGE=$(echo "${BASE_IMAGE}")
+
+get_yaml_array INSTALL '.install[]' "$1"
+
+INSTALL_PATH=("${INSTALL[@]/#/\/tmp/rpms/kmods/*}")
+INSTALL_PATH=("${INSTALL_PATH[@]/%/*.rpm}")
+INSTALL_STR=$(echo "${INSTALL_PATH[*]}" | tr -d '\n')
+
+if [[ ${#INSTALL[@]} -gt 0 ]]; then
+  echo "Installing akmods"
+  echo "Installing: $(echo "${INSTALL[*]}" | tr -d '\n')"
+  if [[ "$BASED_IMAGE" =~ "surface" ]]; then
+    rpm-ostree install kernel-surface-devel-matched $INSTALL_STR
+  else  
+    rpm-ostree install kernel-devel-matched $INSTALL_STR
+  fi  
+fi