fix: make earthly more parallel (#5747)

If you have FROM +dependency, its a good idea to prefetch above it with
BUILD +later-target commands

barretenberg/cpp/Earthfile

@@ -187,6 +187,7 @@ bench-binaries:
 
 # Runs on the bench image, sent from the builder runner
 bench-ultra-honk:
+    BUILD +wasmtime # prefetch
     FROM +source
     COPY --dir +bench-binaries/* .
     # install SRS needed for proving
@@ -198,6 +199,7 @@ bench-ultra-honk:
     RUN cd wasm && wasmtime run --env HARDWARE_CONCURRENCY=16 -Wthreads=y -Sthreads=y --dir=".." ./bin/ultra_honk_bench --benchmark_filter="construct_proof_ultrahonk_power_of_2/20$"
 
 bench-client-ivc:
+    BUILD +wasmtime # prefetch
     FROM +source
     COPY --dir +bench-binaries/* .
     # install SRS needed for proving
@@ -232,9 +234,10 @@ test-clang-format:
     RUN ./format.sh check
 
 test:
+    BUILD +test-clang-format
+    BUILD ./srs_db/+build # prefetch
     FROM +source
     COPY --dir +test-binaries/build build
-    BUILD +test-clang-format
     FROM +preset-release-assert-test
     COPY --dir ./srs_db/+build/. srs_db
     RUN cd build && GTEST_COLOR=1 ctest -j$(nproc) --output-on-failure

boxes/Earthfile

@@ -15,4 +15,4 @@ build:
     ENV AZTEC_CLI=/usr/src/yarn-project/cli/aztec-cli-dest
     RUN yarn && yarn build
     RUN npx -y playwright@1.42 install --with-deps
-    ENTRYPOINT ["/bin/sh", "-c"]
+    ENTRYPOINT ["/bin/sh", "-c"]

noir/Earthfile

@@ -26,13 +26,14 @@ nargo:
     SAVE IMAGE aztecprotocol/nargo
 
 packages:
+    BUILD ../barretenberg/ts/+build # prefetch
     FROM node:20
 
     RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
     RUN echo 'source $HOME/.cargo/env' >> $HOME/.bashrc
     RUN apt update && apt install -y jq libc++1
 
-    # `noir-repo` is nested inside of `noir` so we copy `bb.js` as such to account 
+    # `noir-repo` is nested inside of `noir` so we copy `bb.js` as such to account
     # for the extra nested folder specified in portalled package paths
     COPY ../barretenberg/ts/+build/build /usr/src/../barretenberg/ts
 
@@ -105,8 +106,8 @@ build:
 # FROM scratch
 # COPY --from=builder /usr/src/noir/README.md /usr/src/noir/README.md
 
-# TODO 
-# test: 
+# TODO
+# test:
 # FROM rust:bullseye
 # ARG COMMIT_HASH
 # ENV COMMIT_HASH=${COMMIT_HASH}

yarn-project/Earthfile

@@ -29,6 +29,11 @@ deps:
     RUN ln -s /usr/src/yarn-project/node_modules /usr/src/node_modules
 
 build:
+    # Prefetch targets to not wait for +deps.
+    BUILD ../barretenberg/cpp/+preset-release
+    BUILD ../noir/+nargo
+    BUILD ../noir-projects/+build
+    BUILD ../l1-contracts/+build
     FROM +deps
     RUN apt update && apt install -y jq curl perl && rm -rf /var/lib/apt/lists/* && apt-get clean
 
@@ -82,6 +87,9 @@ all:
 
 # for use with yarn-project/end-to-end and its e2e_mode=cache option
 export-end-to-end:
+    # Prefetch targets to build in parallel.
+    BUILD +end-to-end
+    BUILD +aztec
     ARG EARTHLY_GIT_HASH
     # pushes the foundry image to local docker images
     FROM ../foundry/+build