feat(rpm-ostree): Add support for replacing base packages with 'rpm-o… (#269)

modules/rpm-ostree/README.md

@@ -10,6 +10,8 @@ Then the module installs the packages declared under `install:` using `rpm-ostre
 
 Installing RPM packages directly from a `http(s)` url that points to the RPM file is also supported, you can just put the URLs under `install:` and they'll be installed along with the other packages. The magic string `%OS_VERSION%` is substituted with the current VERSION_ID (major Fedora version) like with the `repos:` property.
 
+The module can also replace base RPM packages. Under `replace:`, the module finds every pair of keys `- from-repo:` and `packages:`. (Multiple pairs are supported.) The module downloads the repository file declared by `- from-repo:` into `/etc/yum.repos.d/` and from that repository replaces packages declared under `packages:` using the command `rpm-ostree override replace`. The repository file is then deleted. The magic string `%OS_VERSION%` is substituted with the current VERSION_ID (major Fedora version) as already said above.
+
 :::note
 [Removed packages are still present in the underlying ostree repository](https://coreos.github.io/rpm-ostree/administrator-handbook/#removing-a-base-package), what `remove` does is kind of like hiding them from the system, it doesn't free up storage space.
 :::

modules/rpm-ostree/module.yml

@@ -15,3 +15,13 @@ example: |
   remove:
     - firefox
     - firefox-langpacks
+  replace:
+    - from-repo: https://copr.fedorainfracloud.org/coprs/trixieua/mutter-patched/repo/fedora-%OS_VERSION%/trixieua-mutter-patched-fedora-%OS_VERSION%.repo
+      packages:
+        - mutter
+        - mutter-common
+        - gdm
+    - from-repo: https://copr.fedorainfracloud.org/coprs/owner/repository2/repo/fedora-%OS_VERSION%/owner-repository2-fedora-%OS_VERSION%.repo
+      packages:
+        - package4
+        - package5

modules/rpm-ostree/rpm-ostree.sh

@@ -76,3 +76,44 @@ elif [[ ${#REMOVE[@]} -gt 0 ]]; then
     echo "Removing: ${REMOVE_STR[*]}"
     rpm-ostree override remove $REMOVE_STR
 fi
+
+get_yaml_array REPLACE '.replace[]' "$1"
+
+# Override-replace RPM packages
+if [[ ${#REPLACE[@]} -gt 0 ]]; then
+    for REPLACEMENT in "${REPLACE[@]}"; do
+
+        # Get repository
+        REPO=$(echo "${REPLACEMENT}" | yq -I=0 ".from-repo")
+        REPO="${REPO//%OS_VERSION%/${OS_VERSION}}"
+
+        # Ensure repository is provided
+        if [[ "${REPO}" == "null" ]]; then
+            echo "Error: Key 'from-repo' was declared, but repository URL was not provided."
+            exit 1
+        fi
+
+        # Get info from repository URL
+        MAINTAINER=$(awk -F'/' '{print $5}' <<< "${REPO}")
+        REPO_NAME=$(awk -F'/' '{print $6}' <<< "${REPO}")
+        FILE_NAME=$(awk -F'/' '{print $9}' <<< "${REPO}")
+
+        # Get packages to replace
+        get_yaml_array PACKAGES '.packages[]' "${REPLACEMENT}"
+        REPLACE_STR="$(echo "${PACKAGES[*]}" | tr -d '\n')"
+
+        # Ensure packages are provided
+        if [[ ${#PACKAGES[@]} == 0 ]]; then
+            echo "Error: No packages were provided for repository '${REPO_NAME}'."
+            exit 1
+        fi
+
+        echo "Replacing packages from repository: '${REPO_NAME}' owned by '${MAINTAINER}'"
+        echo "Replacing: ${REPLACE_STR}"
+
+        curl --output-dir "/etc/yum.repos.d/" -O "${REPO//[$'\t\r\n ']}"
+        rpm-ostree override replace --experimental --from repo=copr:copr.fedorainfracloud.org:${MAINTAINER}:${REPO_NAME} ${REPLACE_STR}
+        rm "/etc/yum.repos.d/${FILE_NAME}"
+
+    done
+fi