CI: Add github action

Add a github action to build uci and then execute the tests.

This first builds and installs libubox and then uses that dependency to
build and test uci.

clang 14 generates debug information in DWARF 5 format, but valgrind
19.0 does not support that. Install valgrind 20.0 from experimental
which supports it.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

.github/workflows/test.yml

@@ -0,0 +1,83 @@
+name: 'Run tests'
+
+on:
+  push:
+
+jobs:
+  build_test:
+    strategy:
+      matrix:
+        include:
+          - compiler: "-DCMAKE_C_COMPILER=clang"
+          - compiler: "-DCMAKE_C_COMPILER=gcc"
+
+    name: Build and run tests
+    runs-on: ubuntu-latest
+    container:
+      image: debian:bookworm
+
+    steps:
+
+      - name: Add Debian experimental
+        run: |
+           echo "deb http://deb.debian.org/debian/ experimental main" >> /etc/apt/sources.list
+
+      - name: Install compiler
+        run: |
+          apt update
+          apt install -y cmake build-essential lua5.1 pkgconf libjson-c-dev liblua5.1-0-dev python3.11-venv clang libc++abi-dev libc++-dev
+          apt -t experimental install -y valgrind
+          useradd -ms /bin/bash buildbot
+
+      - name: Checkout libubox
+        uses: actions/checkout@v3
+        with:
+          repository: openwrt/libubox
+          path: libubox
+
+      - name: Checkout uci
+        uses: actions/checkout@v3
+        with:
+          path: uci
+
+      - name: Create build directory
+        run: mkdir libubox-build
+
+      - name: Create build directory
+        run: mkdir uci-build
+
+      - name: Create install directory
+        run: mkdir install
+
+      - name: Fix permission
+        run: chown -R buildbot:buildbot libubox-build libubox uci uci-build install
+
+      - name: Run cmake (libubox)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: libubox-build
+        run: cmake ../libubox -DCMAKE_INSTALL_PREFIX=../install -DBUILD_LUA=false ${{ matrix.compiler }}
+
+      - name: Run build (libubox)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: libubox-build
+        run: make
+
+      - name: Run install (libubox)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: libubox-build
+        run: make install
+
+      - name: Run cmake (uci)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: uci-build
+        run: cmake ../uci -DUNIT_TESTING=true -DCMAKE_INSTALL_PREFIX=../install -DCMAKE_PREFIX_PATH=../install  ${{ matrix.compiler }}
+
+      - name: Run build (uci)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: uci-build
+        run: make
+
+      - name: Run tests (uci)
+        shell: su buildbot -c "sh -e {0}"
+        working-directory: uci-build
+        run: make test