Update coredns image tags automatically

.github/workflows/update_version.yaml

@@ -4,18 +4,20 @@ on:
   workflow_dispatch:
   schedule:
     - cron: "0 10 * * *"
+  pull_request:
+    branches:
+      - main
 
 jobs:
   generator:
-    runs-on: ubuntu-latest
-    outputs:
-      tags: ${{ steps.fetch-upstream.outputs.tags }}
+    name: Generate Step for new CoreDNS versions
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout rock repository
         uses: actions/checkout@v4
         with:
           path: coredns-rock
-          ref: main
+          ref: ${{ github.head_ref || 'main' }}
 
       - name: Checkout coredns repository
         uses: actions/checkout@v4
@@ -25,70 +27,22 @@ jobs:
           fetch-tags: true
           fetch-depth: 0
 
-      - name: Get current version from rockcraft.yaml
-        id: currentRockVersion
-        uses: mikefarah/yq@master
-        with:
-          cmd: yq '.version' 'coredns-rock/rockcraft.yaml'
-
-      - name: Fetch and filter upstream tags
-        id: fetch-upstream
+      - name: Craft using Make target
+        id: emit-rockcraft
         run: |
-          export DEBIAN_FRONTEND=noninteractive
-          sudo apt-get -qq update
-          sudo apt-get -qq install -y jq
-
-          min_tag="v${{ steps.currentRockVersion.outputs.result }}"
-
-          coredns_tags=( $(git -C coredns tag --sort=-v:refname) )
-          pr_tags=()
-
-          for coredns_tag in "${coredns_tags[@]}"
-          do
-              if [ "$min_tag" = "$coredns_tag" ]; then
-                  break
-              fi
-
-              pr_tags+=( "${coredns_tag:1}" )
-          done
-
-          if [ ${#pr_tags[@]} -eq 0 ]; then
-              tags='[]'
-          else
-              tags=$(printf '%s\n' "${pr_tags[@]}" | jq -R . | jq --compact-output -s .)
-          fi
-
-          echo $tags
-          echo "tags=$tags" >> $GITHUB_OUTPUT
-
-  update:
-    runs-on: ubuntu-latest
-    needs: generator
-    if: ${{ needs.generator.outputs.tags != '[]' }}
-    strategy:
-      matrix:
-        version: ${{ fromJSON(needs.generator.outputs.tags) }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+          pushd coredns-rock
+          make COREDNS_GIT_DIR=../coredns update-component
+          popd
+
+      - name: Commit and push new rockcraft.yaml
+        id: commit-rockcraft
+        if: ${{ steps.emit-rockcraft.outputs.tags != '[]' }}
+        uses: peter-evans/create-pull-request@v7
         with:
-          ref: main
-
-      - name: Update ROCK's source tag
-        uses: mikefarah/yq@master
-        with:
-          cmd: yq -i '.parts.coredns.source-tag = "v${{ matrix.version }}"' 'rockcraft.yaml'
-
-      - name: Update ROCK's version
-        uses: mikefarah/yq@master
-        with:
-          cmd: yq -i '.version = "${{ matrix.version }}"' 'rockcraft.yaml'
-
-      - name: Create pull request
-        uses: peter-evans/create-pull-request@v6
-        with:
-          commit-message: Update CoreDNS version to ${{ matrix.version }}
-          title: "[${{ matrix.version }}] Update CoreDNS version"
-          body: Update CoreDNS version to ${{ matrix.version }}
-          branch: v${{ matrix.version }}
+          commit-message: Update CoreDNS versions with ${{ join(fromJSON(steps.emit-rockcraft.outputs.tags), ', ') }}
+          title: "Update CoreDNS versions"
+          body: Update CoreDNS versions with ${{ join(fromJSON(steps.emit-rockcraft.outputs.tags), ', ') }}
+          path: coredns-rock
+          branch: autoupdate/sync/coredns
+          delete-branch: true
           base: main

CONTRIBUTING.md

@@ -0,0 +1,26 @@
+# Contributing
+
+To make contributions to this rock, the only significant changes to be made are in the `Makefile` and the `build/` directory
+
+## Upgrading the components
+
+To Upgrade the rocks for new releases of coredns run the following make target:
+
+```shell
+make update-component
+```
+
+* if `jq` or `yq` are not installed on the system, they will be when the target for those items runs
+* this will clone the upstream coredns/coredns repo only for listing tags
+* it will create a new rockcraft yaml based on the tags missing from this repo
+* Raise a PR from a branch with the new rockcraft.yaml files
+
+
+## Testing
+
+To test the rocks, run the pytest sanity check test
+
+```shell
+cd tests
+tox -e sanity
+```

Makefile

@@ -0,0 +1,48 @@
+# Makefile for CoreDNS Rock
+# Description: This Makefile installs necessary tools and updates components.
+
+which_jq = $(shell which jq)
+which_yq = $(shell which yq)
+COREDNS_GIT_DIR = /tmp/coredns.git
+
+.PHONY: JQ
+JQ:
+	@if [ -z "${which_jq}" ]; then \
+		echo "Installing jq..."; \
+		sudo apt-get update && sudo apt-get install -y jq; \
+	else \
+		echo "jq is installed @ ${which_jq}"; \
+	fi
+
+.PHONY: YQ
+YQ:
+	@if [ -z "$(which_yq)" ]; then \
+		echo "Installing yq..."; \
+		sudo snap install yq; \
+	else \
+		echo "yq is installed @ ${which_yq}"; \
+	fi
+
+.PHONY: install-tools
+install-tools: JQ YQ
+	@echo "Tools installed."
+
+.PHONY: clone-CoreDNS
+clone-CoreDNS:
+	@echo "Cloning CoreDNS..."
+	@if [ -d $(COREDNS_GIT_DIR) ]; then \
+		echo "CoreDNS already cloned."; \
+	else \
+		mkdir -p $(COREDNS_GIT_DIR); \
+		git clone --bare --filter=blob:none --no-checkout https://github.com/coredns/coredns.git $(COREDNS_GIT_DIR); \
+	fi
+
+.PHONY: update-component
+update-component: install-tools clone-CoreDNS
+	@echo "Updating component..."
+	@COREDNS_GIT_DIR=$(COREDNS_GIT_DIR) build/craft_release.sh
+
+# Target to remove the temporary directory
+clean:
+	@rm -rf $(COREDNS_GIT_DIR)
+	@echo "Temporary directory removed: $(COREDNS_GIT_DIR)"

build/craft_release.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# This script is used to create a new release rock image from the included template
+set -eu
+
+SCRIPT_DIR="$( dirname "${BASH_SOURCE[0]}")"
+REPO_DIR=$(dirname ${SCRIPT_DIR})
+VERSIONS=${SCRIPT_DIR}/../versions.txt
+
+function usage() {
+    if [[ -z ${COREDNS_GIT_DIR+x} ]]; then
+        echo "COREDNS_GIT_DIR is not set" > /dev/stderr
+        echo "   Clone with 'git clone --bare --filter=blob:none --no-checkout https://github.com/coredns/coredns.git /tmp/coredns.git'" > /dev/stderr
+        echo "   Re-run with 'COREDNS_GIT_DIR=/tmp/coredns.git $0'" > /dev/stderr
+        exit 1
+    fi
+}
+
+function create_rockcrafts(){
+    # Get the current releases from existing rockcraft yamls
+    if [[ -v GITHUB_WORKSPACE ]]; then
+        echo "::group::Create rockcrafts"
+    fi
+
+    rm -rf ${VERSIONS}
+    for rockcraft in $(find ${REPO_DIR} -name 'rockcraft.yaml'); do
+        echo $(yq '.version' $rockcraft) >> ${VERSIONS}
+    done
+    current_releases=( $(sort -V ${VERSIONS}) )
+    min_tag="v${current_releases[0]}"   # this is the oldest release tag we support
+    rm -rf ${VERSIONS}
+
+    # Get the tags from the coredns repo, ignoring all before the min_tag
+    coredns_tags=( $(git -C ${COREDNS_GIT_DIR} tag --sort=v:refname | sed -n '/'${min_tag}'/,$p') )
+    new_tags=()
+
+    for coredns_tag in "${coredns_tags[@]}"; do
+        if [[ ! -e ${REPO_DIR}/${coredns_tag:1}/rockcraft.yaml ]]; then
+            new_tag=${coredns_tag:1}
+            new_tags+=($new_tag)
+            echo "Creating rockcraft.yaml for ${new_tag}"
+            mkdir -p ${REPO_DIR}/${new_tag}
+            unset ignored_template_var
+            tag=${new_tag} envsubst < ${SCRIPT_DIR}/template/rockcraft.yaml.in > ${REPO_DIR}/${new_tag}/rockcraft.yaml
+        else
+            echo "Skipping ${coredns_tag} as it already exists"
+        fi
+    done
+
+    if [ ${#new_tags[@]} -eq 0 ]; then
+        tags='[]'
+    else
+        tags=$(printf '%s\n' "${new_tags[@]}" | jq -R . | jq --compact-output -s .)
+    fi
+    if [[ -v GITHUB_OUTPUT ]]; then
+        echo "tags=$tags" >> $GITHUB_OUTPUT
+    fi
+    if [[ -v GITHUB_WORKSPACE ]]; then
+        echo "::endgroup::"
+    fi
+
+}
+
+
+function main() {
+    usage
+    create_rockcrafts
+}
+
+main

build/template/rockcraft.yaml.in

@@ -0,0 +1,37 @@
+name: coredns
+summary: ROCK for the CoreDNS Project.
+description: This ROCK is a drop in replacement for the coredns/coredns image.
+version: "${tag}"
+license: Apache-2.0
+
+base: bare
+build-base: [email protected]
+platforms:
+  amd64:
+  arm64:
+
+entrypoint-service: coredns
+services:
+  coredns:
+    override: replace
+    summary: "coredns service"
+    startup: enabled
+    command: "/coredns [ -conf /etc/coredns/Corefile ]"
+    on-failure: shutdown
+
+parts:
+  coredns:
+    plugin: nil
+    source: https://github.com/coredns/coredns
+    source-type: git
+    source-tag: v${tag}
+    source-depth: 1
+    build-packages:
+      - build-essential
+    build-snaps:
+      - go/1.21/stable
+    stage-packages:
+      - ca-certificates_data
+    override-build: |
+      make
+      cp $${ignored_template_var}CRAFT_PART_BUILD/coredns $${ignored_template_var}CRAFT_PRIME

tests/sanity/test_rock.py

@@ -2,11 +2,23 @@
 # Copyright 2024 Canonical, Ltd.
 #
 
+from pathlib import Path
+
 import pytest
+import yaml
 from k8s_test_harness.util import docker_util, env_util
 
+TEST_PATH = Path(__file__)
+REPO_PATH = TEST_PATH.parent.parent.parent
+
+
+def _image_versions():
+    all_rockcrafts = REPO_PATH.glob("**/rockcraft.yaml")
+    yamls = [yaml.safe_load(rock.read_bytes()) for rock in all_rockcrafts]
+    return [rock["version"] for rock in yamls]
+
 
-@pytest.mark.parametrize("image_version", ["1.11.1", "1.11.3"])
+@pytest.mark.parametrize("image_version", _image_versions())
 def test_sanity(image_version):
     rock = env_util.get_build_meta_info_for_rock_version(
         "coredns", image_version, "amd64"