Re: [PATCH] tests/docker: use stable URLs for zlib tarballs

On 8/3/2026 11:07 AM, Stefan Hajnoczi wrote:
> The tarballs at https://zlib.net/zlib-X.Y.Z.tar.xz become unavailable
> when a new release is made. This breaks the emsdk-wasm64-cross.docker
> file that fetches the tarball and builds zlib from source.
> 
> There is actually an archive available with a stable URL. Use that
> instead. This does require switching from xz to gzip since xz tarballs
> are not available in the archive.
> 
> The upshot is that the emsdk-wasm64-cross Docker image build will
> continue working into the future without causing CI breakage when the
> zlib project makes a new release.
> 
> Reported-by: Michael Tokarev <[email protected]>
> Suggested-by: Daniel P. Berrangé <[email protected]>
> Reviewed-by: Daniel P. Berrangé <[email protected]>
> Signed-off-by: Stefan Hajnoczi <[email protected]>
> ---
> v2:
> - Fix "bzip2 to gzip since bzip2" typo. It should have been xz instead
>   of bzip2. [danpb]
> 
>  tests/docker/dockerfiles/emsdk-wasm64-cross.docker | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/docker/dockerfiles/emsdk-wasm64-cross.docker b/tests/docker/dockerfiles/emsdk-wasm64-cross.docker
> index c04a741b0e5..4f26ce7a269 100644
> --- a/tests/docker/dockerfiles/emsdk-wasm64-cross.docker
> +++ b/tests/docker/dockerfiles/emsdk-wasm64-cross.docker
> @@ -56,8 +56,8 @@ EOF
>  FROM build-base AS zlib-dev
>  ARG ZLIB_VERSION
>  RUN mkdir -p /zlib
> -RUN curl -Ls https://zlib.net/zlib-$ZLIB_VERSION.tar.xz | \
> -    tar xJC /zlib --strip-components=1
> +RUN curl -Ls https://zlib.net/fossils/zlib-$ZLIB_VERSION.tar.gz | \
> +    tar xzC /zlib --strip-components=1
>  WORKDIR /zlib
>  RUN emconfigure ./configure --prefix=$TARGET --static
>  RUN emmake make install -j$(nproc)

We could also switch to git clone with -single-branch -depth 1, but
current patch works fine.
Feel free to apply it directly to staging/your tree.

Reviewed-by: Pierrick Bouvier <[email protected]>

Regards,
Pierrick