feat: add fast multi-platform build

.gitignore

@@ -1,7 +1,17 @@
+# log files
 *_dump.log
 logs/
-target/
+
+# environment secrets
+.env
+
+# IDEs
 .vscode
 .idea
+
+# build artifacts
+target/
+dist/
+
+# other
 .DS_Store
-.env

justfile

@@ -136,23 +136,57 @@ send-blob-preconf count='1':
         --count {{count}}
 
 # build all the docker images locally
-build-images:
-	@just build-sidecar
-	@just build-bolt-boost
+build-local-images:
+	@just build-local-sidecar
+	@just build-local-bolt-boost
 
 # build the docker image for the bolt sidecar
 [private]
-build-sidecar:
+build-local-sidecar:
 	cd bolt-sidecar && docker build -t ghcr.io/chainbound/bolt-sidecar:0.1.0 . --load
 
 # build the docker image for bolt-boost
 [private]
-build-bolt-boost:
+build-local-bolt-boost:
 	cd bolt-boost && docker build -t ghcr.io/chainbound/bolt-boost:0.1.0 . --load
 
-# build and push multi-platform docker images to GHCR with the provided tag
-[confirm("are you sure? this will build and push new images on ghcr.io")]
-release tag:
-    chmod +x ./scripts/check_version_bumps.sh && ./scripts/check_version_bumps.sh {{tag}}
-    cd bolt-sidecar && docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/chainbound/bolt-sidecar:{{tag}} --push .
-    cd bolt-boost && docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/chainbound/bolt-boost:{{tag}} --push .
+
+# Cross platform builds
+# 
+# We use cargo-zigbuild to build cross-platform binaries faster and to get around
+# weird linking bugs that often happen with cross or similar tools.
+# 
+# Steps:
+# 1. install zig: 
+#       ubuntu: snap install zig --classic --beta
+#       macOS: brew install zig
+#       others: https://github.com/ziglang/zig/wiki/Install-Zig-from-a-Package-Manager
+# 2. install zigbuild: cargo install cargo-zigbuild
+# 
+# build the cross platform binaries for a package by name. available: "bolt-sidecar", "bolt-boost".
+[private]
+cross-build-binary package target_arch release_dir:
+    rustup target add {{target_arch}}
+
+
+    cd {{package}} && cargo zigbuild --target {{target_arch}} --profile release
+
+    mkdir -p dist/bin/{{release_dir}}
+    cp {{package}}/target/{{target_arch}}/release/{{package}} dist/bin/{{release_dir}}/{{package}}
+
+# build and push multi-platform docker images to GHCR for a package. available: "bolt-sidecar", "bolt-boost".
+build-and-push-image package tag:
+    @just cross-build-binary {{package}} x86_64-unknown-linux-gnu amd64
+    @just cross-build-binary {{package}} aarch64-unknown-linux-gnu arm64
+
+    docker buildx build \
+      --build-arg BINARY={{package}} \
+      --file ./scripts/cross.Dockerfile \
+      --platform linux/amd64,linux/arm64 \
+      --tag ghcr.io/chainbound/{{package}}:{{tag}} \
+      --push .
+
+# build and push all the available packages to GHCR with the provided tag
+build-and-push-all-images tag:
+    @just build-and-push-image bolt-sidecar {{tag}}
+    @just build-and-push-image bolt-boost {{tag}}

scripts/cross.Dockerfile

@@ -0,0 +1,18 @@
+# This image is meant to enable cross-architecture builds.
+# It assumes the binary has already been compiled for `$TARGETPLATFORM` and is
+# locatable in `./dist/bin/$TARGETARCH/$BINARY`.
+
+FROM --platform=$TARGETPLATFORM ubuntu:22.04
+
+LABEL org.opencontainers.image.source=https://github.com/chainbound/bolt
+LABEL org.opencontainers.image.licenses="MIT"
+
+# Filled by docker buildx
+ARG TARGETARCH
+
+# Should be set by the caller when building the image
+ARG BINARY
+
+COPY ./dist/bin/$TARGETARCH/$BINARY /usr/local/bin/bolt
+
+ENTRYPOINT ["/usr/local/bin/bolt"]