Add cross-compilation capabilities

Signed-off-by: Valerian Saliou <valerian@valeriansaliou.name>

Cross.toml

@@ -0,0 +1,10 @@
+[build.env]
+passthrough = [
+  "RUSTFLAGS"
+]
+
+[target.x86_64-unknown-linux-musl]
+image = "valeriansaliou/sonic:cross-x86_64-unknown-linux-musl"
+
+[target.armv7-unknown-linux-musleabihf]
+image = "valeriansaliou/sonic:cross-armv7-unknown-linux-musleabihf"

scripts/release_binaries.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+##
+#  Sonic
+#
+#  Fast, lightweight and schema-less search backend
+#  Copyright: 2020, Valerian Saliou <valerian@valeriansaliou.name>
+#  License: Mozilla Public License v2.0 (MPL v2.0)
+##
+
+# Read arguments
+while [ "$1" != "" ]; do
+    argument_key=`echo $1 | awk -F= '{print $1}'`
+    argument_value=`echo $1 | awk -F= '{print $2}'`
+
+    case $argument_key in
+        -v | --version)
+            SONIC_VERSION="$argument_value"
+            ;;
+        *)
+            echo "Unknown argument received: '$argument_key'"
+            exit 1
+            ;;
+    esac
+
+    shift
+done
+
+# Ensure release version is provided
+if [ -z "$SONIC_VERSION" ]; then
+  echo "No Sonic release version was provided, please provide it using '--version'"
+
+  exit 1
+fi
+
+# Define release pipeline
+function release_for_architecture {
+    final_tar="v$SONIC_VERSION-$1.tar.gz"
+
+    rm -rf ./sonic/ && \
+        RUSTFLAGS="-C target-feature=-crt-static -C link-arg=-s" cross build --target "$2" --release && \
+        mkdir ./sonic && \
+        cp -p "target/$2/release/sonic" ./sonic/ && \
+        cp -r ./config.cfg sonic/ && \
+        tar -czvf "$final_tar" ./sonic && \
+        rm -r ./sonic/
+    release_result=$?
+
+    if [ $release_result -eq 0 ]; then
+        echo "Result: Packed architecture: $1 to file: $final_tar"
+    fi
+
+    return $release_result
+}
+
+# Run release tasks
+ABSPATH=$(cd "$(dirname "$0")"; pwd)
+BASE_DIR="$ABSPATH/../"
+
+rc=0
+
+pushd "$BASE_DIR" > /dev/null
+    echo "Executing release steps for Sonic v$SONIC_VERSION..."
+
+    release_for_architecture "x86_64" "x86_64-unknown-linux-musl" && \
+        release_for_architecture "armv7" "armv7-unknown-linux-musleabihf"
+    rc=$?
+
+    if [ $rc -eq 0 ]; then
+        echo "Success: Done executing release steps for Sonic v$SONIC_VERSION"
+    else
+        echo "Error: Failed executing release steps for Sonic v$SONIC_VERSION"
+    fi
+popd > /dev/null
+
+exit $rc

tools/cross/cross-armv7-unknown-linux-musleabihf/Dockerfile

@@ -0,0 +1,4 @@
+FROM rustembedded/cross:armv7-unknown-linux-musleabihf-0.2.0
+
+RUN apt-get update && \
+    apt-get install -y clang libclang-dev libc6-dev-i386

tools/cross/cross-x86_64-unknown-linux-musl/Dockerfile

@@ -0,0 +1,4 @@
+FROM rustembedded/cross:x86_64-unknown-linux-musl-0.2.0
+
+RUN apt-get update && \
+    apt-get install -y clang libclang-dev libc6-dev-i386