Docker Bake Harness

Co-authored-by: Nineko <cnotsomark@gmail.com>
Signed-off-by: Jason Volk <jason@zemos.net>

docker/Dockerfile.ingredients

@@ -0,0 +1,83 @@
+# syntax = docker/dockerfile:1.11-labs
+
+FROM input AS source
+ARG git_checkout
+
+ADD --keep-git-dir . /usr/src/tuwunel
+WORKDIR /usr/src/tuwunel
+RUN <<EOF
+    env
+    set -eux
+    git reset \
+        --hard \
+        --no-recurse-submodules \
+        ${git_checkout}
+EOF
+
+
+FROM input AS ingredients
+ARG sys_target
+ARG rust_toolchain
+ARG RUSTUP_HOME
+ARG CARGO_HOME
+ARG CARGO_TARGET
+ARG CARGO_TARGET_DIR
+
+WORKDIR /usr/src/tuwunel
+COPY --link --from=source /usr/src/tuwunel .
+
+RUN \
+--mount=type=cache,dst=${RUSTUP_HOME},sharing=locked \
+--mount=type=cache,dst=${CARGO_HOME},sharing=locked \
+--mount=type=cache,dst=${CARGO_TARGET_DIR},sharing=locked \
+<<EOF
+    env
+    set -eux
+    git submodule update \
+        --remote \
+        --no-fetch \
+        --recursive \
+        --checkout \
+        --init
+
+    rustup run ${rust_toolchain} \
+        cargo fetch \
+            --locked \
+            --target ${CARGO_TARGET}
+EOF
+
+
+FROM input AS preparing
+ARG rust_toolchain
+ARG RUSTUP_HOME
+ARG CARGO_HOME
+ARG CARGO_TARGET
+ARG CARGO_TARGET_DIR
+
+WORKDIR /usr/src/tuwunel
+RUN \
+--mount=type=cache,dst=${RUSTUP_HOME},sharing=locked \
+--mount=type=cache,dst=${CARGO_HOME},sharing=locked \
+--mount=type=cache,dst=${CARGO_TARGET_DIR},sharing=locked \
+<<EOF
+    env
+    set -euxo pipefail
+    rustup run ${rust_toolchain} \
+        cargo chef prepare \
+            --recipe-path recipe.json
+
+    manifest="Cargo.toml"
+    package="rust-librocksdb-sys"
+    cmd="cargo tree --manifest-path ${manifest} -f {r} -p ${package}"
+    url="$(rustup run ${rust_toolchain} ${cmd} | head -n 1)"
+    echo "$url" > rocksdb.url
+
+    sha1sum recipe.json rocksdb.url
+EOF
+
+
+FROM scratch AS recipe
+
+WORKDIR /
+COPY --from=preparing /usr/src/tuwunel/recipe.json .
+COPY --from=preparing /usr/src/tuwunel/rocksdb.url .