ci: add simple build test workflow (#696)

as well as a dependabot config to update used actions in workflows.

When building from a fork, tags may not exist. Try to obtain latest tag from upstream via GitHub API in this case. Exit early if this fails as well, as DEB packages strictly require their version to start with an integer. For debugging reasons, error output is unmuted.

Signed-off-by: MichaIng <micha@dietpi.com>

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "daily"
+  target-branch: "master"
+  labels:
+  - "enhancement"

.github/workflows/build-test.yml

@@ -0,0 +1,19 @@
+name: Build test
+on: [pull_request, push, workflow_dispatch]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+permissions:
+  contents: read
+jobs:
+  build:
+    strategy:
+      matrix:
+        arch: [armhf, arm64, amd64, riscv64]
+      fail-fast: false
+    name: Build on ${{ matrix.arch }}
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.owner.login != github.event.pull_request.base.repo.owner.login
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v4
+    - run: make ${{ matrix.arch }}

build.sh

@@ -51,8 +51,9 @@ packages() {
 
 	cd librespot
 
-	LIBRESPOT_VER="$(git describe --tags "$(git rev-list --tags --max-count=1)" 2>/dev/null || echo unknown)"
-	LIBRESPOT_HASH="$(git rev-parse HEAD | cut -c 1-7 2>/dev/null || echo unknown)"
+	echo 'Obtaining latest Librespot Git repository tag for DEB package version suffix ...'
+	LIBRESPOT_VER="$(git describe --tags "$(git rev-list --tags --max-count=1)" || echo unknown)"
+	LIBRESPOT_HASH="$(git rev-parse HEAD | cut -c 1-7 || echo unknown)"
 
 	echo "Build Librespot binary..."
 	cargo build --jobs "$(nproc)" --profile release --target "$BUILD_TARGET" --no-default-features --features "alsa-backend pulseaudio-backend with-avahi"
@@ -156,9 +157,17 @@ START_BUILDS=$(now)
 
 cd /mnt/raspotify
 
-# Get the git rev of raspotify for .deb versioning
-RASPOTIFY_GIT_VER="$(git describe --tags "$(git rev-list --tags --max-count=1)" 2>/dev/null || echo unknown)"
-RASPOTIFY_HASH="$(git rev-parse HEAD | cut -c 1-7 2>/dev/null || echo unknown)"
+echo 'Obtaining latest Git repository tag for DEB package version ...'
+RASPOTIFY_GIT_VER="$(git describe --tags "$(git rev-list --tags --max-count=1)" || :)"
+if [ -z "$RASPOTIFY_GIT_VER" ]; then
+	echo 'W: Could not obtain latest tag from local repository. Obtaining it from upstream: https://api.github.com/repos/dtcooper/raspotify/tags'
+	RASPOTIFY_GIT_VER="$(curl -sSf  "https://api.github.com/repos/dtcooper/raspotify/tags" | awk -F\" '/^ *"name": "/{print $4;exit}' || :)"
+fi
+if [ -z "$RASPOTIFY_GIT_VER" ]; then
+	echo 'E: Could not obtain latest tag from upstream repository either. Exiting ...'
+	exit 1
+fi
+RASPOTIFY_HASH="$(git rev-parse HEAD | cut -c 1-7 || echo unknown)"
 
 echo "Build Raspotify $RASPOTIFY_GIT_VER~$RASPOTIFY_HASH..."
 
@@ -181,7 +190,7 @@ case $ARCHITECTURE in
 esac
 
 # Fix broken permissions resulting from running the Docker container as root.
-[ $(id -u) -eq 0 ] && chown -R "$PERMFIX_UID:$PERMFIX_GID" /mnt/raspotify 2>/dev/null
+[ $(id -u) -eq 0 ] && chown -R "$PERMFIX_UID:$PERMFIX_GID" /mnt/raspotify
 
 BUILD_TIME=$(duration_since "$START_BUILDS")