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docker/golang: fix brotli multi-stage build — empty submodule + cmake version #53

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docker/golang: fix brotli multi-stage build — empty submodule + cmake version #53

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Initial plan
Copilot Mar 8, 2026
908cff3
Convert docker/golang/Dockerfile to multi-stage build
Copilot Mar 8, 2026
ff6ea6f
fix: clone brotli from git in builder stage instead of empty submodul…
Copilot Mar 8, 2026
3dca079
fix: install CMake 3.31.0 in brotli-builder stage; verify SHA256 on b…
Copilot Mar 8, 2026
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29 changes: 23 additions & 6 deletions docker/golang/Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,3 +1,24 @@
FROM ubuntu:bionic AS brotli-builder

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update && \
apt-get -y install \
build-essential git wget && \
rm -rf /var/lib/apt/lists/*

RUN wget https://github.com/Kitware/CMake/releases/download/v3.31.0/cmake-3.31.0-linux-x86_64.tar.gz && \
echo "0fcb338b4515044f9ac77543550ac92c314c58f6f95aafcac5cd36aa75db6924 cmake-3.31.0-linux-x86_64.tar.gz" | sha256sum -c && \
tar xf cmake-3.31.0-linux-x86_64.tar.gz -C /usr --strip-components=1 && rm cmake-3.31.0-linux-x86_64.tar.gz

RUN git clone https://github.com/google/brotli.git /tmp/brotli && \
git -C /tmp/brotli checkout 664952333f675eb189b9d8dfefb1d33538cc41f6

RUN cd /tmp/brotli && \
mkdir out && cd out && \
cmake -DCMAKE_INSTALL_PREFIX=/brotli-install .. && \
make -j$(nproc) && make install

FROM ubuntu:bionic

# custom golang image with CMake and Brotli support (compatible with ubuntu 18.04..22.04)
Expand All @@ -22,11 +43,7 @@ ENV PATH=$GOPATH/bin:/usr/local/go/bin:$PATH
RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"

RUN wget https://github.com/Kitware/CMake/releases/download/v3.31.0/cmake-3.31.0-linux-x86_64.tar.gz && \
echo "0fcb338b4515044f9ac77543550ac92c314c58f6f95aafcac5cd36aa75db6924 cmake-3.31.0-linux-x86_64.tar.gz" | sha256sum -c && \
tar xf cmake-3.31.0-linux-x86_64.tar.gz -C /usr --strip-components=1 && rm cmake-3.31.0-linux-x86_64.tar.gz

COPY submodules/ tmp/

RUN cd tmp/brotli && \
mkdir out && cd out && \
cmake .. && \
make && make install
COPY --from=brotli-builder /brotli-install/ /usr/local/