From ce90e9c46cbf52e865e763b04fcc1aaf1b067b7f Mon Sep 17 00:00:00 2001
From: Iker Barriocanal <32816711+iker-barriocanal@users.noreply.github.com>
Date: Tue, 1 Aug 2023 16:22:28 +0200
Subject: [PATCH] feat(ci): Build Relay for Linux ARM

---
 .cargo/config.toml                 |  3 +++
 .github/workflows/build_binary.yml | 35 +++++++++++++++++++++++++++---
 Dockerfile                         | 14 ++++++++++--
 scripts/docker-build-linux.sh      |  4 +++-
 4 files changed, 50 insertions(+), 6 deletions(-)
 create mode 100644 .cargo/config.toml

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000000..1cf09b7989
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,3 @@
+[target.aarch64-unknown-linux-gnu]
+linker = "aarch64-linux-gnu-gcc"
+runner = "qemu-aarch64"
diff --git a/.github/workflows/build_binary.yml b/.github/workflows/build_binary.yml
index bd80edf42b..41ff17310b 100644
--- a/.github/workflows/build_binary.yml
+++ b/.github/workflows/build_binary.yml
@@ -3,14 +3,14 @@ name: Binary Release Build
 on:
   push:
     branches:
-      - release/**
+      # - release/**  # testing
 
 env:
   CARGO_TERM_COLOR: always
 
 jobs:
-  linux:
-    name: Linux
+  linux_x86:
+    name: Linux x86
     runs-on: ubuntu-latest
 
     steps:
@@ -38,6 +38,35 @@ jobs:
           name: ${{ github.sha }}
           path: target/x86_64-unknown-linux-gnu/release/relay-Linux-x86_64*
 
+  linux_arm:
+      name: Linux ARM
+      runs-on: ubuntu-latest
+
+      steps:
+        - uses: actions/checkout@v3
+          with:
+            submodules: recursive
+
+        - name: Build in Docker
+          run: |
+            # Get the latest stable rust toolchain version available
+            TOOLCHAIN=$(curl -s 'https://static.rust-lang.org/dist/channel-rust-stable.toml' | awk '/\[pkg.rust\]/ {getline;print;}' | sed -r 's/^version = "([0-9.]+) .*/\1/')
+            scripts/docker-build-linux.sh "$TOOLCHAIN"
+          env:
+            BUILD_ARCH: aarch64
+            RELAY_FEATURES:
+
+        - name: Bundle Debug File
+          run: |
+            cd target/aarch64-unknown-linux-gnu/release/
+            zip relay-Linux-aarch64-debug.zip relay.debug
+            mv relay relay-Linux-aarch64
+
+        - uses: actions/upload-artifact@v3
+          with:
+            name: ${{ github.sha }}
+            path: target/aarch64-unknown-linux-gnu/release/relay-Linux-aarch64*
+
   macos:
     name: macOS
     runs-on: macos-11
diff --git a/Dockerfile b/Dockerfile
index 171ea556ae..2bd25d2c6d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,16 @@ RUN yum -y update \
     llvm-toolset-7.0-clang-devel \
     && yum clean all \
     && rm -rf /var/cache/yum \
-    && ln -s /usr/bin/cmake3 /usr/bin/cmake
+    && ln -s /usr/bin/cmake3 /usr/bin/cmake \
+    && if [ ${BUILD_ARCH} == "aarch64" ]; then \
+    yum -y install curl dnf ca-certificates gcc-aarch64-linux-gnu qemu-user \
+    && dnf --forcearch aarch64 --release 7 install -y glibc glibc-devel  --installroot "/usr/aarch64-linux-gnu/sys-root/" \
+    && curl -L -s https://www.centos.org/keys/RPM-GPG-KEY-CentOS-7-aarch64 > /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7-aarch64 \
+    && cat /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7-aarch64 >> /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 \
+    && ln -s "/usr/aarch64-linux-gnu/sys-root/lib64/libgcc_s.so.1" "/usr/aarch64-linux-gnu/sys-root/lib64/libgcc_s.so" \
+    # NOTE(iker): work-around to create a cmake toolchain file for arch-specific builds, since only objcopy is needed.
+    && rm -rf "/usr/bin/objcopy" && ln -s "/usr/bin/aarch64-linux-gnu-objcopy" "/usr/bin/objcopy" ; \
+    fi
 
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
@@ -25,7 +34,8 @@ ENV RUSTUP_HOME=/usr/local/rustup \
 
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
     | sh -s -- -y --profile minimal --default-toolchain=${RUST_TOOLCHAIN_VERSION} \
-    && echo -e '[registries.crates-io]\nprotocol = "sparse"\n[net]\ngit-fetch-with-cli = true' > $CARGO_HOME/config
+    && echo -e '[registries.crates-io]\nprotocol = "sparse"\n[net]\ngit-fetch-with-cli = true' > $CARGO_HOME/config \
+    && rustup target add aarch64-unknown-linux-gnu
 
 COPY --from=sentry-cli /bin/sentry-cli /bin/sentry-cli
 
diff --git a/scripts/docker-build-linux.sh b/scripts/docker-build-linux.sh
index 86caa12f78..3bd604950c 100755
--- a/scripts/docker-build-linux.sh
+++ b/scripts/docker-build-linux.sh
@@ -3,7 +3,9 @@ set -eux
 
 TOOLCHAIN=$1
 
-if [ "${BUILD_ARCH}" = "x86_64" ]; then
+if [ "${BUILD_ARCH}" = "aarch64" ]; then
+  DOCKER_ARCH="amd64"
+elif [ "${BUILD_ARCH}" = "x86_64" ]; then
   DOCKER_ARCH="amd64"
 elif [ "${BUILD_ARCH}" = "i686" ]; then
   DOCKER_ARCH="i386"