Adds builds for armhf and arm64 architectures.

This also refactors the workflow a bit to only run the reprepro job
once, for all DEBs.

Since cross-builds are scary, this also adds a QEMU test job for
them, to ensure they can be installed and the binary can execute.

The two build jobs are kept separate, even if they have lots of
overlap, so that testing can start without waiting for native builds.

Thanks to

* @bensteinberg for providing his build script.
* https://github.com/kornelski/cargo-deb#cross-compilation
* https://github.com/marketplace/actions/arm-runner

Closes #2.

.github/workflows/main.yml

@@ -57,19 +57,21 @@ jobs:
       - name: Check Repo Release
         id: check-repo-release
         run: |
-          new_release_exists=
+          declare -a new_release_exists
+          for arch in amd64 armhf arm64; do
             for ver_codename in ubuntu-22.04/jammy ubuntu-20.04/focal; do
               ver=${ver_codename%/*}
               codename=${ver_codename##*/}
               # Note the leading v to match the Git tag.
-            indexed=v$(reprepro -b debian --list-format '${version}\n' listmatched "$codename" innernet)
+              indexed=v$(reprepro -A "$arch" -b debian --list-format '${version}\n' listmatched "$codename" innernet)
               upstream="${{ steps.check-latest-release.outputs.innernet_release }}-0ubuntu0~$codename"
-            echo "Repo release in $codename: $indexed"
+              echo "Repo release in $codename/$arch: $indexed"
               if [ "x$indexed" != "x$upstream" ]; then
-              new_release_exists="${new_release_exists:+$new_release_exists,}\"$ver\""
+                new_release_exists+=( "\"$ver\"" )
               fi
             done
-          echo "new_release_exists=[$new_release_exists]" >>"$GITHUB_OUTPUT"
+          done
+          (IFS=$'\n' ; echo "new_release_exists=[$(echo -n "${new_release_exists[*]}" | sort -u | tr '\n' , | sed -e 's;,$;;')]" >>"$GITHUB_OUTPUT")
 
       - name: Show Output
         id: show-output
@@ -77,10 +79,11 @@ jobs:
           echo "## Job Outputs" >>"$GITHUB_STEP_SUMMARY"
           echo "* \`innernet_release=${{ steps.check-latest-release.outputs.innernet_release }}\`" >>"$GITHUB_STEP_SUMMARY"
           echo "* \`innernet_version=${{ steps.check-latest-release.outputs.innernet_version }}\`" >>"$GITHUB_STEP_SUMMARY"
+          echo "* \`tarball_url=${{ steps.check-latest-release.outputs.tarball_url }}\`" >>"$GITHUB_STEP_SUMMARY"
           echo "* \`new_release_exists=${{ steps.check-repo-release.outputs.new_release_exists }}\`" >>"$GITHUB_STEP_SUMMARY"
 
   build-deb:
-    name: Build DEB Packages
+    name: Build DEB Packages ${{ matrix.os }}/${{ matrix.arch }}
     needs: [check-upstream]
     if: "fromJson(needs.check-upstream.outputs.new_release_exists)[0] != null"
     runs-on: ${{ matrix.os }}
@@ -88,24 +91,17 @@ jobs:
     strategy:
       matrix:
         os: ${{ fromJson(needs.check-upstream.outputs.new_release_exists) }}
+        include:
+          - arch: amd64
+          - os: ubuntu-22.04
+            codename: jammy
+          - os: ubuntu-20.04
+            codename: focal
 
     steps:
       - name: Install Distro Dependencies
         run: sudo env DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes dpkg-dev liblzma-dev
 
-      - name: Translate Codename
-        id: translate-codename
-        run: |
-          case "${{ matrix.os }}" in
-          ubuntu-22.04) codename=jammy ;;
-          ubuntu-20.04) codename=focal ;;
-          *)
-            echo "Unknown OS: ${{ matrix.os }}" >&2
-            exit 1
-            ;;
-          esac
-          echo "codename=$codename" >>"$GITHUB_OUTPUT"
-
       - name: Download Latest Release
         id: download-release
         run: |
@@ -122,47 +118,184 @@ jobs:
 
       - name: Install cargo-deb
         run: |
-          type -p cargo-deb || cargo install cargo-deb
+          type -p cargo-deb >/dev/null || cargo install cargo-deb
 
       - name: Set Up Rust Cache
-        uses: Swatinem/rust-cache@v1
+        uses: Swatinem/rust-cache@v2
         with:
-          key: ${{ matrix.os }}
+          key: ${{ matrix.os }}-amd64
 
       - name: Build Client DEB
         uses: actions-rs/cargo@v1
         with:
           command: deb
-          args: -p client --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ steps.translate-codename.outputs.codename }}
+          args: -p client --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ matrix.codename }}
 
       - name: Build Server DEB
         uses: actions-rs/cargo@v1
         with:
           command: deb
-          args: -p server --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ steps.translate-codename.outputs.codename }}
+          args: -p server --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ matrix.codename }}
 
       - name: Upload DEBs
         uses: actions/upload-artifact@v3
         with:
-          name: deb-${{ matrix.os }}
+          # Syntax: https://github.com/actions/upload-artifact/issues/22
+          name: deb ${{ matrix.codename }} ${{ matrix.arch }}
           path: target/debian/*.deb
 
-      - name: Show Output
-        id: show-output
-        run: |
-          echo "## Job Outputs" >>"$GITHUB_STEP_SUMMARY"
-          echo "* \`codename=${{ steps.translate-codename.outputs.codename }}\`" >>"$GITHUB_STEP_SUMMARY"
-
-  release:
-    needs: [check-upstream, build-deb]
-    # Avoid push conflicts.
-    concurrency: update_repository
+  build-cross-deb:
+    name: Build DEB Packages ${{ matrix.os }}/${{ matrix.arch }} (Cross-Compiled)
+    needs: [check-upstream]
     if: "fromJson(needs.check-upstream.outputs.new_release_exists)[0] != null"
     runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
         os: ${{ fromJson(needs.check-upstream.outputs.new_release_exists) }}
+        arch:
+          - armhf
+          - arm64
+        include:
+          - os: ubuntu-22.04
+            codename: jammy
+          - os: ubuntu-20.04
+            codename: focal
+          - arch: armhf
+            target: armv7-unknown-linux-gnueabihf
+            target_prefix: arm-linux-gnueabihf-
+          - arch: arm64
+            target: aarch64-unknown-linux-gnu
+            target_prefix: aarch64-linux-gnu-
+
+    steps:
+      - name: Install Distro Dependencies
+        run: |
+          sudo dpkg --add-architecture "${{ matrix.arch }}"
+          sudo sed -i -e 's;^\(deb\(-src\)\?\)\(\s\+\)\(https\?://\(azure\.archive\.ubuntu\.com\|archive\.ubuntu\.com\|security\.ubuntu\.com\)/\);\1\3[arch=amd64,i386]\3\4;' /etc/apt/sources.list /etc/apt/sources.list.d/*.list
+          echo "deb [arch=armhf,arm64,riscv64] http://ports.ubuntu.com/ ${{ matrix.codename }} main universe" | sudo tee /etc/apt/sources.list.d/ports.list >/dev/null
+          echo "deb [arch=armhf,arm64,riscv64] http://ports.ubuntu.com/ ${{ matrix.codename }}-security main universe" | sudo tee -a /etc/apt/sources.list.d/ports.list >/dev/null
+          echo "deb [arch=armhf,arm64,riscv64] http://ports.ubuntu.com/ ${{ matrix.codename }}-updates main universe" | sudo tee -a /etc/apt/sources.list.d/ports.list >/dev/null
+          sudo apt-get update
+          sudo env DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes dpkg-dev liblzma-dev pkg-config build-essential "crossbuild-essential-${{ matrix.arch }}" libsqlite3-dev:"${{ matrix.arch }}"
+
+      - name: Set Up Environment
+        id: setup-env
+        run: |
+          echo "CC_${{ matrix.target }}=${{ matrix.target_prefix }}gcc" >>"$GITHUB_ENV"
+          echo "HOST_CC=gcc" >>"$GITHUB_ENV"
+          mkdir -p .cargo
+          echo "[target.${{ matrix.target }}]" >>.cargo/config
+          echo "linker = \"${{ matrix.target_prefix }}gcc\"" >>.cargo/config
+          echo "strip = { path = \"${{ matrix.target_prefix }}strip\" }" >>.cargo/config
+          echo "objcopy = { path = \"${{ matrix.target_prefix }}objcopy\" }" >>.cargo/config
+
+      - name: Download Latest Release
+        id: download-release
+        run: |
+          wget -O- "${{ needs.check-upstream.outputs.tarball_url }}" | tar xz
+          mv tonarino-innernet-*/* .
+          rm -fr tonarino-innernet-*
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+          target: ${{ matrix.target }}
+
+      - name: Set Up Rust Cache
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.os }}-${{ matrix.arch }}
+
+      - name: Install cargo-deb
+        run: |
+          type -p cargo-deb >/dev/null || cargo install cargo-deb
+
+      - name: Build Client DEB
+        uses: actions-rs/cargo@v1
+        with:
+          command: deb
+          args: -p client --target=${{ matrix.target }} --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ matrix.codename }}
+
+      - name: Build Server DEB
+        uses: actions-rs/cargo@v1
+        with:
+          command: deb
+          args: -p server --target=${{ matrix.target }} --deb-version=${{ needs.check-upstream.outputs.innernet_version }}-0ubuntu0~${{ matrix.codename }}
+
+      - name: Upload DEBs
+        uses: actions/upload-artifact@v3
+        with:
+          # Syntax: https://github.com/actions/upload-artifact/issues/22
+          name: deb ${{ matrix.codename }} ${{ matrix.arch }}
+          path: target/${{ matrix.target }}/debian/*.deb
+
+  test-cross:
+    name: Test DEB Packages ${{ matrix.image }}/${{ matrix.codename }} (QEMU)
+    needs: [build-cross-deb]
+    if: "fromJson(needs.check-upstream.outputs.new_release_exists)[0] != null"
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        image:
+          - raspios_lite:latest
+          - raspios_lite_arm64:latest
+        include:
+          - image: raspios_lite:latest
+            codename: focal
+            qemu_cpu: cortex-a7
+            qemu_cpu_info: cpuinfo/raspberrypi_3b
+            arch: armhf
+          - image: raspios_lite_arm64:latest
+            codename: focal
+            qemu_cpu: cortex-a53
+            qemu_cpu_info: cpuinfo/raspberrypi_4b
+            arch: arm64
+
+    steps:
+      - name: Download DEBs
+        uses: actions/download-artifact@v3
+        with:
+          name: deb ${{ matrix.codename }} ${{ matrix.arch }}
+          path: ./artifacts
+
+      - name: Test DEBs
+        id: test
+        uses: pguyot/arm-runner-action@v2
+        with:
+          base_image: ${{ matrix.image }}
+          cpu: ${{ matrix.qemu_cpu }}
+          cpu_info: ${{ matrix.qemu_cpu_info }}
+          copy_artifact_path: github_test_summary
+          debug: false
+          commands: |
+            echo "* \`arch=$(dpkg-architecture -q DEB_HOST_ARCH)\`" >>"github_test_summary"
+            echo "* \`codename=$(lsb_release --short --codename)\`" >>"github_test_summary"
+
+            dpkg -i artifacts/innernet_*.deb
+            dpkg -i artifacts/innernet-server_*.deb
+
+            DEBIAN_FRONTEND=noninteractive apt-get update
+            DEBIAN_FRONTEND=noninteractive apt-get --no-install-recommends --yes --fix-broken install
+
+            innernet --version
+            innernet-server --version
+
+      - name: Show Output
+        id: show-output
+        run: |
+          echo "## Job Outputs" >>"$GITHUB_STEP_SUMMARY"
+          cat github_test_summary >>"$GITHUB_STEP_SUMMARY"
+
+  update-repo:
+    name: Update Repository
+    needs: [check-upstream, build-deb, test-cross]
+    if: "fromJson(needs.check-upstream.outputs.new_release_exists)[0] != null"
+    runs-on: ubuntu-latest
 
     steps:
       - name: Install Distro Dependencies
@@ -178,19 +311,6 @@ jobs:
           echo "${{ secrets.GPG_SIGNING_KEY }}" | gpg --quiet --batch --yes --import
           echo '${{ secrets.GPG_SIGNING_PASSPHRASE }}' | /usr/lib/gnupg/gpg-preset-passphrase --preset 57F0E65446A301CC19914FD61167922350A2D8B2
 
-      - name: Translate Codename
-        id: translate-codename
-        run: |
-          case "${{ matrix.os }}" in
-          ubuntu-22.04) codename=jammy ;;
-          ubuntu-20.04) codename=focal ;;
-          *)
-            echo "Unknown OS: ${{ matrix.os }}" >&2
-            exit 1
-            ;;
-          esac
-          echo "codename=$codename" >>"$GITHUB_OUTPUT"
-
       - name: Checkout
         uses: actions/checkout@v3
         with:
@@ -201,15 +321,23 @@ jobs:
       - name: Download DEBs
         uses: actions/download-artifact@v3
         with:
-          name: deb-${{ matrix.os }}
           path: ./artifacts
 
-      - name: Import DEBs
+      - name: Include DEBs
+        id: include-debs
         run: |
-          cd artifacts
-          for name in *.deb; do
-            reprepro --export=silent-never -b ../debian includedeb "${{ steps.translate-codename.outputs.codename }}" "$name"
+          declare -a codenames archs
+          for path in artifacts/deb\ */*.deb; do
+            codename=${path#artifacts/deb }
+            arch=${codename##* }
+            arch=${arch%%/*}
+            codename=${codename% *}
+            reprepro -A "$arch" --export=silent-never -b debian includedeb "$codename" "$path"
+            codenames+=( "$codename" )
+            archs+=( "$arch" )
           done
+          (IFS=$'\n' ; echo "codenames=$(echo "${codenames[*]}" | sort -u | xargs -r)" >>"$GITHUB_OUTPUT")
+          (IFS=$'\n' ; echo "archs=$(echo "${archs[*]}" | sort -u | xargs -r)" >>"$GITHUB_OUTPUT")
 
       - name: Update Repository
         run: |
@@ -218,7 +346,7 @@ jobs:
           }
 
           if has_changes debian/pool; then
-              reprepro -b debian export "${{ steps.translate-codename.outputs.codename }}"
+              reprepro -b debian export
           fi
 
           if has_changes debian/{db,dists,pool}; then
@@ -226,7 +354,7 @@ jobs:
               git \
                   -c 'user.email=41898282+github-actions[bot]@users.noreply.github.com' \
                   -c 'user.name=github-actions[bot]' \
-                  commit -m "Included release tonarino/innernet@${{ needs.check-upstream.outputs.innernet_release }} in ${{ steps.translate-codename.outputs.codename }}."
+                  commit -m "Included release tonarino/innernet@${{ needs.check-upstream.outputs.innernet_release }} in ${{ steps.include-debs.outputs.codenames }} for ${{ steps.include-debs.outputs.archs }}."
           else
               echo 'No updates to commit.'
           fi
@@ -238,11 +366,9 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           branch: ${{ github.ref }}
 
-      # GitHub shows an inconsistent delay with pulling right after pushing. Since we push
-      # for multiple distributions, we have to make sure the next checkout doesn't conflict
-      # with the current.
-      #
-      # TODO: merge artefacts so we don't need one Release job per distribution.
-      - name: Delay 1m for pushed changes to be visible
-        run: sleep 1m
-        shell: bash
+      - name: Show Output
+        id: show-output
+        run: |
+          echo "## Job Outputs" >>"$GITHUB_STEP_SUMMARY"
+          echo "* \`codenames=${{ steps.include-debs.outputs.codenames }}\`" >>"$GITHUB_STEP_SUMMARY"
+          echo "* \`archs=${{ steps.include-debs.outputs.archs }}\`" >>"$GITHUB_STEP_SUMMARY"

debian/conf/distributions

@@ -2,7 +2,7 @@ Origin: Unofficial Innernet Debian repository
 Label: innernet-debian
 Description: APT repository for https://github.com/tonarino/innernet/.
 Codename: focal
-Architectures: amd64
+Architectures: amd64 armhf arm64
 Components: contrib
 DebOverride: deboverride
 SignWith: 65828D743CEE8B69
@@ -11,7 +11,7 @@ Origin: Unofficial Innernet Debian repository
 Label: innernet-debian
 Description: APT repository for https://github.com/tonarino/innernet/.
 Codename: jammy
-Architectures: amd64
+Architectures: amd64 armhf arm64
 Components: contrib
 DebOverride: deboverride
 SignWith: 65828D743CEE8B69