ci: build and deploy relays with filtermail binary and run interop tests against madmail (#131)

* ci: Run relay integration tests using cmlxc

Builds filtermail and runs cmlxc
tests against a patched chatmail/relay.

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

* ci: run integration tests with branch filtermail binary deployed with chatmail/relay main code

---------

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>
Co-authored-by: Jagoda Ślązak <jslazak@jslazak.com>

filtermail/.github/workflows/ci.yml

@@ -11,6 +11,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   fmt:
     name: Check Formatting
@@ -59,8 +63,8 @@ jobs:
         env:
           RUSTUP_TOOLCHAIN: ${{ matrix.toolchain }}
 
-  test:
+  rust-test:
-    name: Test on ${{ matrix.os }}
+    name: Run rust tests on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -75,3 +79,27 @@ jobs:
           toolchain: stable
       - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2
       - run: cargo test
+
+  relay-test:
+    name: Test the relay with cmlxc and custom filtermail
+    uses: chatmail/cmlxc/.github/workflows/lxc-test.yml@main
+    with:
+      cmlxc_commands: |
+        sudo apt-get update && sudo apt-get install -y musl-tools
+        rustup target add x86_64-unknown-linux-musl
+        export CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc
+        cd repo && RUSTFLAGS="-Ctarget-feature=+crt-static -Clink-self-contained=yes" cargo build --release --target x86_64-unknown-linux-musl
+        cmlxc init
+        cmlxc -v deploy-cmdeploy --filtermail repo/target/x86_64-unknown-linux-musl/release/filtermail cm0
+        cmlxc -v test-mini cm0
+        cmlxc -v test-cmdeploy cm0
+
+        # cross cmdeploy relay test
+        cmlxc -v deploy-cmdeploy --filtermail repo/target/x86_64-unknown-linux-musl/release/filtermail --ipv4-only cm1
+        cmlxc -v test-cmdeploy cm0 cm1
+
+        # cross cmdeploy/madmail relay tests
+        cmlxc -v deploy-madmail mad0
+        cmlxc -v test-cmdeploy cm0 mad0
+        cmlxc -v test-mini cm0 mad0
+        cmlxc -v test-mini mad0 cm0