Add GitHub workflow to auto update (rebuild & publish) containers

.github/workflows/container-auto-update.yml

@@ -0,0 +1,73 @@
+name: Periodically rebuild & publish containers (auto update)
+
+on:
+  schedule:
+    # run once a day at 22:20 UTC
+    - cron: '20 22 * * *'
+
+concurrency: build
+
+env:
+  CI_TOOLS_SETUP: https://raw.githubusercontent.com/SGSGermany/ci-tools/main/setup.sh
+
+defaults:
+  run:
+    shell: bash -eu -o pipefail {0}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      REGISTRY: ghcr.io
+      OWNER: sgsgermany
+      IMAGE: selfoss
+
+    steps:
+      - name: Setup CI tools
+        run: |
+          . <(curl -fsS -L "$CI_TOOLS_SETUP" | bash -s ~/ci-tools)
+          echo "CI_TOOLS=$CI_TOOLS" | tee -a "$GITHUB_ENV"
+          echo "CI_TOOLS_PATH=$CI_TOOLS_PATH" | tee -a "$GITHUB_ENV"
+
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log into container registry ${{ env.REGISTRY }}
+        uses: redhat-actions/podman-login@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Generate container image tags
+        run: |
+          source <(./tags.sh "$GITHUB_RUN_ID.$GITHUB_RUN_NUMBER")
+          echo "VERSION=$VERSION" | tee -a "$GITHUB_ENV"
+          echo "HASH=$HASH" | tee -a "$GITHUB_ENV"
+          echo "TAGS=$TAGS" | tee -a "$GITHUB_ENV"
+
+      - name: Check for updates
+        run: |
+          BUILD_ACTION="$(./check-for-updates.sh)"
+          echo "BUILD_ACTION=$BUILD_ACTION" | tee -a "$GITHUB_ENV"
+
+      - name: Build container image
+        if: ${{ env.BUILD_ACTION != '' }}
+        run: |
+          buildah unshare ./build.sh
+
+      - name: Container image metadata
+        run: |
+          "$CI_TOOLS_PATH/containers/get-metadata.sh" "$REGISTRY/$OWNER" "$IMAGE:${TAGS%% *}"
+
+      - name: Push container image
+        if: ${{ env.BUILD_ACTION != '' }}
+        uses: redhat-actions/push-to-registry@v2
+        with:
+          image: ${{ env.IMAGE }}
+          registry: ${{ env.REGISTRY }}/${{ env.OWNER }}
+          tags: ${{ env.TAGS }}

check-for-updates.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+# Selfoss
+# A php-fpm container running Selfoss, a RSS reader and feed aggregator.
+#
+# Copyright (c) 2023  SGS Serious Gaming & Simulations GmbH
+#
+# This work is licensed under the terms of the MIT license.
+# For a copy, see LICENSE file or <https://opensource.org/licenses/MIT>.
+#
+# SPDX-License-Identifier: MIT
+# License-Filename: LICENSE
+
+set -eu -o pipefail
+export LC_ALL=C.UTF-8
+
+[ -v CI_TOOLS ] && [ "$CI_TOOLS" == "SGSGermany" ] \
+    || { echo "Invalid build environment: Environment variable 'CI_TOOLS' not set or invalid" >&2; exit 1; }
+
+[ -v CI_TOOLS_PATH ] && [ -d "$CI_TOOLS_PATH" ] \
+    || { echo "Invalid build environment: Environment variable 'CI_TOOLS_PATH' not set or invalid" >&2; exit 1; }
+
+source "$CI_TOOLS_PATH/helper/common.sh.inc"
+source "$CI_TOOLS_PATH/helper/common-traps.sh.inc"
+source "$CI_TOOLS_PATH/helper/git.sh.inc"
+source "$CI_TOOLS_PATH/helper/chkupd.sh.inc"
+
+BUILD_DIR="$(CDPATH= cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
+source "$BUILD_DIR/container.env"
+
+TAG="${TAGS%% *}"
+
+# check whether the base image was updated
+chkupd_baseimage "$REGISTRY/$OWNER/$IMAGE" "$TAG" || exit 0
+
+# check whether the image is using the latest Selfoss dev version
+if [ -z "${VERSION:-}" ]; then
+    # check whether the Git repository indicates a new version
+    echo + "SOURCE_DIR=\"\$(mktemp -d)\"" >&2
+    SOURCE_DIR="$(mktemp -d)"
+
+    trap_exit rm -rf "$SOURCE_DIR"
+
+    git_clone "$GIT_REPO" "$GIT_REF" \
+        "$SOURCE_DIR" "$SOURCE_DIR"
+
+    echo + "VERSION=\"\$(jq -re '.ver | sub(\"(-SNAPSHOT|-[0-9a-f]+)$\"; \"\")' -C $(quote "$SOURCE_DIR/package.json")\"" >&2
+    VERSION="$(jq -re '.ver | sub("(-SNAPSHOT|-[0-9a-f]+)$"; "")' "$SOURCE_DIR/package.json")"
+
+    if [ -z "$VERSION" ]; then
+        echo "Unable to read Selfoss version from '$SOURCE_DIR/package.json': Version not found" >&2
+        exit 1
+    elif ! [[ "$VERSION" =~ ^[0-9]+\.[0-9]+$ ]]; then
+        echo "Unable to read Selfoss version from '$SOURCE_DIR/package.json': '$VERSION' is no valid version" >&2
+        exit 1
+    fi
+
+    echo + "HASH_SHORT=\"\$(git -C $(quote "$SOURCE_DIR") rev-parse --short HEAD)\"" >&2
+    HASH_SHORT="$(git -C "$SOURCE_DIR" rev-parse --short HEAD)"
+
+    echo + "VERSION=\"$VERSION-$HASH_SHORT\"" >&2
+    VERSION="$VERSION-$HASH_SHORT"
+fi
+
+chkupd_image_version "$REGISTRY/$OWNER/$IMAGE:$TAG" "$VERSION" || exit 0