No 'target' folder after building

[jagjordi]

Hi I am able to build using cargo, however I don't see any target directory after it finishes

root@d573d00c80f8:~/librespot-0.4.2# cargo build --release 
   Compiling librespot-protocol v0.4.2 (/root/librespot-0.4.2/protocol)
   Compiling librespot-core v0.4.2 (/root/librespot-0.4.2/core)
   Compiling librespot-audio v0.4.2 (/root/librespot-0.4.2/audio)
   Compiling librespot-metadata v0.4.2 (/root/librespot-0.4.2/metadata)
   Compiling librespot-discovery v0.4.2 (/root/librespot-0.4.2/discovery)
   Compiling librespot-playback v0.4.2 (/root/librespot-0.4.2/playback)
   Compiling librespot-connect v0.4.2 (/root/librespot-0.4.2/connect)
   Compiling librespot v0.4.2 (/root/librespot-0.4.2)
    Finished release [optimized] target(s) in 18.56s
root@d573d00c80f8:~/librespot-0.4.2# ls
CHANGELOG.md	 Cargo.toml	audio	 core	    metadata	rustfmt.toml
COMPILING.md	 LICENSE	cache	 discovery  playback	src
CONTRIBUTING.md  PUBLISHING.md	connect  docs	    protocol
Cargo.lock	 README.md	contrib  examples   publish.sh

I am using docker using debian bullseye image. This is my dockerfile (ignore snapcast related stuff)

FROM debian:bullseye

ARG TARGETARCH=amd64
ARG SNAPCASTVERSION=0.27.0
RUN dpkg --add-architecture arm64
RUN dpkg --add-architecture armhf
RUN dpkg --add-architecture armel
RUN dpkg --add-architecture mipsel
RUN apt-get update && apt-get install wget ca-certificates -y
RUN update-ca-certificates --fresh

RUN apt install avahi-daemon -y 
RUN DEBARCH="$TARGETARCH"; \
    if [ "$DEBARCH" = "arm" ]; then DEBARCH=armhf; fi; \
    wget "https://github.com/badaix/snapcast/releases/download/v${SNAPCASTVERSION}/snapserver_${SNAPCASTVERSION}-1_${DEBARCH}.deb" -O /tmp/snapserver.deb

#RUN dpkg -i --force-all /tmp/snapserver.deb
#RUN apt-get -f install -y
RUN apt install /tmp/snapserver.deb -y

RUN mkdir -p /root/.config/snapcast/

EXPOSE 1704
RUN apt-get install -y curl git build-essential crossbuild-essential-arm64 crossbuild-essential-armel crossbuild-essential-armhf crossbuild-essential-mipsel pkg-config
RUN apt-get install -y libasound2-dev libasound2-dev:arm64 libasound2-dev:armel libasound2-dev:armhf libasound2-dev:mipsel
RUN apt-get install -y libpulse0 libpulse0:arm64 libpulse0:armel libpulse0:armhf
 
RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
ENV PATH="/root/.cargo/bin/:${PATH}"
RUN rustup target add aarch64-unknown-linux-gnu
RUN rustup target add arm-unknown-linux-gnueabi
RUN rustup target add arm-unknown-linux-gnueabihf
RUN rustup target add mipsel-unknown-linux-gnu

RUN mkdir /.cargo && \
    echo '[target.aarch64-unknown-linux-gnu]\nlinker = "aarch64-linux-gnu-gcc"' > /.cargo/config && \
    echo '[target.arm-unknown-linux-gnueabihf]\nlinker = "arm-linux-gnueabihf-gcc"' >> /.cargo/config && \
    echo '[target.arm-unknown-linux-gnueabi]\nlinker = "arm-linux-gnueabi-gcc"' >> /.cargo/config && \
    echo '[target.mipsel-unknown-linux-gnu]\nlinker = "mipsel-linux-gnu-gcc"' >> /.cargo/config

RUN mkdir /build && \
    mkdir /pi-tools && \
    curl -L https://github.com/raspberrypi/tools/archive/648a6eeb1e3c2b40af4eb34d88941ee0edeb3e9a.tar.gz | tar xz --strip-components 1 -C /pi-tools

ENV CARGO_TARGET_DIR /build
ENV CARGO_HOME /build/cache
ENV PKG_CONFIG_ALLOW_CROSS=1
ENV PKG_CONFIG_PATH_aarch64-unknown-linux-gnu=/usr/lib/aarch64-linux-gnu/pkgconfig/
ENV PKG_CONFIG_PATH_arm-unknown-linux-gnueabihf=/usr/lib/arm-linux-gnueabihf/pkgconfig/
ENV PKG_CONFIG_PATH_arm-unknown-linux-gnueabi=/usr/lib/arm-linux-gnueabi/pkgconfig/
ENV PKG_CONFIG_PATH_mipsel-unknown-linux-gnu=/usr/lib/mipsel-linux-gnu/pkgconfig/

WORKDIR /tmp
RUN curl -L https://github.com/librespot-org/librespot/archive/refs/tags/v0.4.2.tar.gz | tar xz
WORKDIR /tmp/librespot-0.4.2
RUN ls -l
RUN cargo build --release
RUN ls
#RUN cp ./target/release/librespot /usr/local/bin

ENTRYPOINT ["snapserver"]

Any idea of what I am doing wrong?

[eladyn]

Without further knowledge of your setup, I'd guess that the target folder might be in /build due to this line:

ENV CARGO_TARGET_DIR /build

[jagjordi]

That was it! I'm not that familiar with rust/cargo so I completely missed that line :/