Unable to import local library dependency

[rsb-tbg]

Hey all,

I have a project that looks like this:

project/
---app-backend/ **rust binary
---file-processor/ **rust binary
---gcp-sdk/ **rust library
---project-config/
------...
------docker-compose.yaml

Both app-backend and file-processor depend on gcp-sdk and each of their cargo.toml's use a relative path of "../gcp-sdk". They both compile just fine.

In my docker-compose, I'm setting the context at the project/ level. I've provided my Dockerfile for file-processor below but I continue to get the further-below error.

I've removed cargo chef from my Dockerfile and it builds correctly without issue. Does anybody have any idea what I'm doing wrong with cargo chef (because I would like to continue using it)?

# Base image for building the Rust application
FROM lukemathwalker/cargo-chef:latest-rust-latest AS chef
WORKDIR /app
RUN apt update && apt install -y lld clang

# Planner stage
FROM chef AS planner
COPY ./gcp-sdk /app/gcp-sdk
COPY ./file-processor /app/file-processor

WORKDIR /app/file-processor

# Compute a lock-like file for the project dependencies
RUN cargo chef prepare --recipe-path /app/recipe.json

# Builder stage
FROM chef AS builder
COPY --from=planner /app/recipe.json recipe.json

# Build dependencies using the prepared recipe.json
RUN cargo chef cook --release --recipe-path recipe.json

# Copy the source code after the dependencies are cached
COPY --from=planner /app/gcp-sdk /app/gcp-sdk
COPY --from=planner /app/file-processor /app/file-processor

# Build the Rust binary
RUN cargo build --release --bin file-processor

# Runtime stage
FROM debian:bookworm-slim AS runtime
RUN apt-get update -y \
    && apt-get install -y --no-install-recommends openssl ca-certificates \
    && apt-get autoremove -y \
    && apt-get clean -y \
    && rm -rf /var/lib/apt/lists/*

# Copy the compiled binary from the build stage
COPY --from=builder /app/target/release/file-processor /app/file-processor

COPY ./project-config/configuration /app/configuration
COPY ./project-config/wait-for-it.sh /app/wait-for-it.sh
RUN chmod +x /app/wait-for-it.sh

# Entry point for the backend binary
ENTRYPOINT ["/app/file-processor"]

And here's the build error:

rsb-tbg@MacBook-Pro project-config % docker compose up --build
[+] Building 9.7s (16/23)                                                                                                            docker:desktop-linux
 => [file-processor internal] load build definition from Containerfile                                                                               0.0s
 => => transferring dockerfile: 1.47kB                                                                                                               0.0s
 => [file-processor internal] load metadata for docker.io/library/debian:bookworm-slim                                                               0.3s
 => [file-processor internal] load metadata for docker.io/lukemathwalker/cargo-chef:latest-rust-latest                                               0.3s
 => [file-processor internal] load .dockerignore                                                                                                     0.0s
 => => transferring context: 2B                                                                                                                      0.0s
 => [file-processor chef 1/3] FROM docker.io/lukemathwalker/cargo-chef:latest-rust-latest@sha256:e279910c5108e3acf843cb910e7ce1726e0ab37bd3eb394fb8  0.0s
 => [file-processor internal] load build context                                                                                                     0.9s
 => => transferring context: 2.98MB                                                                                                                  0.9s
 => [file-processor runtime 1/6] FROM docker.io/library/debian:bookworm-slim@sha256:36e591f228bb9b99348f584e83f16e012c33ba5cad44ef5981a1d7c0a93eca2  0.0s
 => CACHED [file-processor runtime 2/6] RUN apt-get update -y     && apt-get install -y --no-install-recommends openssl ca-certificates     && apt-  0.0s
 => CACHED [file-processor chef 2/3] WORKDIR /app                                                                                                    0.0s
 => CACHED [file-processor chef 3/3] RUN apt update && apt install -y lld clang                                                                      0.0s
 => CACHED [file-processor planner 1/4] COPY ./gcp-sdk /app/gcp-sdk                                                                                  0.0s
 => [file-processor planner 2/4] COPY ./file-processor /app/file-processor                                                                           4.4s
 => [file-processor planner 3/4] WORKDIR /app/file-processor                                                                                         0.0s
 => [file-processor planner 4/4] RUN cargo chef prepare --recipe-path /app/recipe.json                                                               0.1s
 => CACHED [file-processor builder 1/5] COPY --from=planner /app/recipe.json recipe.json                                                             0.0s
 => ERROR [file-processor builder 2/5] RUN cargo chef cook --release --recipe-path recipe.json                                                       0.3s
------                                                                                                                                                    
 > [file-processor builder 2/5] RUN cargo chef cook --release --recipe-path recipe.json:                                                                  
0.123 warning: unused manifest key: bin.0.plugin                                                                                                          
0.123 warning: unused manifest key: lib.plugin                                                                                                            
0.148     Updating crates.io index                                                                                                                        
0.248 error: failed to get `gcp-sdk` as a dependency of package `file-processor v0.0.1 (/app)`
0.248 
0.248 Caused by:
0.248   failed to load source for dependency `gcp-sdk`
0.248 
0.248 Caused by:
0.248   Unable to update /gcp-sdk
0.248 
0.248 Caused by:
0.248   failed to read `/gcp-sdk/Cargo.toml`
0.248 
0.248 Caused by:
0.248   No such file or directory (os error 2)
0.249 thread 'main' panicked at /usr/local/cargo/registry/src/index.crates.io-6f17d22bba15001f/cargo-chef-0.1.68/src/recipe.rs:218:27:
0.249 Exited with status code: 101
0.249 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
------
failed to solve: process "/bin/sh -c cargo chef cook --release --recipe-path recipe.json" did not complete successfully: exit code: 101

Thanks for any help!!!