Cannot install python wasmtime on Alpine OS docker container

[sharksforarms]

Cannot install python wasmtime on Alpine OS docker container

I think this has something to do with this: docker-library/docs#904

Getting

ERROR: Could not find a version that satisfies the requirement wasmtime (from versions: none)
ERROR: No matching distributions found for wasmtime

[alexcrichton]

Thanks for the report! At this time we only support glibc binary releases, and to install on Alpine you'll need to compile from source against musl.

[alexcrichton]

If it helps as well, here's an example of how to build it in alpine:

FROM alpine

# Install build tools
RUN apk add musl-dev g++ curl git

# Install nightly Rust
ENV CARGO_HOME=/cargo RUSTUP_HOME=/rustup PATH=$PATH:/cargo/bin
RUN curl https://sh.rustup.rs | sh -s -- -y --default-toolchain=nightly

# Download and build wasmtime, note that we configure the musl target for
# dynamic linkage here instead of the default static.
RUN git clone https://github.com/bytecodealliance/wasmtime --recursive
WORKDIR /wasmtime
ENV RUSTFLAGS=-Ctarget-feature=-crt-static
RUN cargo fetch
RUN cargo build --release

# Download python and such to build the python extension
RUN apk add python3
RUN pip3 install setuptools wheel setuptools-rust
RUN cd crates/misc/py && python3 setup.py bdist_wheel

[sharksforarms]

Thanks for the tip!

[bjorn3]

I think this can be closed. If not at least it should be moved to https://github.com/bytecodealliance/wasmtime-py.

[alexcrichton]

Indeed yes I think the wasmtime-py bits have changed enough that this is no longer relevant as-is.

[willhausman]

@alexcrichton is this answer still true? I had opened bytecodealliance/wasmtime-dotnet#82 this morning, but further investigation revealed it was not an issue specific to the dotnet build as I can reproduce the same behavior with python.

[bjorn3]

That is probably the same kind of error. However it is something that needs to be separately fixed for both. For example by adding a new build for musl based systems.

[alexcrichton]

Yes the wasmtime-py extension and the Wasmtime repository do not have precompiled artifacts for musl, only for glibc.