feat(ci): move rust docker target bash to shell script

ci/Dockerfile.rust

@@ -0,0 +1,42 @@
+FROM alpine:latest AS builder
+
+WORKDIR /build
+
+RUN apk add rustup build-base protoc
+# todo: arm64 target
+RUN rustup-init --default-host x86_64-unknown-linux-musl --default-toolchain nightly-2024-08-20 --profile default -y
+
+ENV PATH=/root/.cargo/bin:$PATH
+ENV RUSTFLAGS='-C link-arg=-s'
+
+RUN cargo install cargo-chef --locked
+
+# build dependencies first to cache
+FROM builder AS recipe-builder
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM builder AS binary-builder
+COPY --from=recipe-builder /build/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json --target x86_64-unknown-linux-musl
+
+COPY Cargo.toml /build/
+COPY Cargo.lock /build/
+COPY proto/ /build/proto
+
+# this needs to match workspaces in Cargo.toml
+COPY lib/libpk /build/lib/libpk
+COPY services/api/ /build/services/api
+COPY services/gateway/ /build/services/gateway
+COPY services/avatars/ /build/services/avatars
+
+RUN cargo build --bin api --release --target x86_64-unknown-linux-musl
+RUN cargo build --bin gateway --release --target x86_64-unknown-linux-musl
+RUN cargo build --bin avatars --release --target x86_64-unknown-linux-musl
+
+FROM scratch
+
+COPY --from=binary-builder /build/target/x86_64-unknown-linux-musl/release/api /api
+COPY --from=binary-builder /build/target/x86_64-unknown-linux-musl/release/gateway /gateway
+COPY --from=binary-builder /build/target/x86_64-unknown-linux-musl/release/avatars /avatars
+COPY --from=binary-builder /build/target/x86_64-unknown-linux-musl/release/avatars /avatars

ci/rust-docker-target.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+set -e
+
+#tag=
+#branch=
+#push=
+
+build() {
+    bin=$1
+    extra=$2
+
+    f=$(mktemp)
+
+    cat > $f << EOF
+FROM alpine:latest
+COPY .docker-bin/$bin /bin/$bin
+$extra
+CMD ["/bin/$bin"]
+EOF
+
+    echo "building $dockerfile"
+
+    $dockerfile | docker build -t ghcr.io/pluralkit/$bin:$tag -f $f .
+
+    rm $f
+
+    if [ "$push" == "true" ]; then
+      docker push ghcr.io/pluralkit/$bin:$tag
+      docker image tag ghcr.io/pluralkit/$bin:$tag ghcr.io/pluralkit/$bin:$branch
+      docker push ghcr.io/pluralkit/$bin:$branch
+      if [ "$branch" == "main" ]; then
+        docker image tag ghcr.io/pluralkit/$bin:$tag ghcr.io/pluralkit/$bin:latest
+        docker push ghcr.io/pluralkit/$bin:latest
+      fi
+    fi
+}
+
+# add rust binaries here to build
+build api
+build gateway
+build avatars