Auto merge of #105176 - klensy:docker-smol, r=Mark-Simulacrum

CI: reduce docker image sizes

Reduces docker image sizes by using simple tips like: cleaning packet managers cache, squashing sequential installation steps into one.

For some images this gives ~40mb for apt-based images (not so much), but ~200mb(!) for centos one.

Author: bors

src/ci/docker/host-aarch64/aarch64-gnu/Dockerfile

@@ -14,7 +14,8 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-ins
   gdb \
   libssl-dev \
   pkg-config \
-  xz-utils
+  xz-utils \
+  && rm -rf /var/lib/apt/lists/*
 
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh

src/ci/docker/host-x86_64/dist-i686-linux/Dockerfile

@@ -32,7 +32,8 @@ RUN yum upgrade -y && \
       wget \
       xz \
       zlib-devel.i686 \
-      zlib-devel.x86_64
+      zlib-devel.x86_64 \
+      && yum clean all
 
 RUN mkdir -p /rustroot/bin && ln -s /usr/bin/cmake3 /rustroot/bin/cmake
 

src/ci/docker/host-x86_64/dist-x86_64-freebsd/Dockerfile

@@ -15,7 +15,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   wget \
   libssl-dev \
-  pkg-config
+  pkg-config \
+  && rm -rf /var/lib/apt/lists/*
 
 COPY scripts/freebsd-toolchain.sh /tmp/
 RUN /tmp/freebsd-toolchain.sh x86_64

src/ci/docker/host-x86_64/dist-x86_64-illumos/Dockerfile

@@ -11,7 +11,8 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends \
       libgmp-dev \
       libmpfr-dev \
-      libmpc-dev
+      libmpc-dev \
+      && rm -rf /var/lib/apt/lists/*
 
 COPY scripts/illumos-toolchain.sh /tmp/
 

src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile

@@ -32,7 +32,8 @@ RUN yum upgrade -y && \
       wget \
       xz \
       zlib-devel.i686 \
-      zlib-devel.x86_64
+      zlib-devel.x86_64 \
+      && yum clean all
 
 RUN mkdir -p /rustroot/bin && ln -s /usr/bin/cmake3 /rustroot/bin/cmake
 

src/ci/docker/host-x86_64/dist-x86_64-musl/Dockerfile

@@ -16,7 +16,8 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-ins
   gdb \
   patch \
   libssl-dev \
-  pkg-config
+  pkg-config \
+  && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /build/
 

src/ci/docker/host-x86_64/i686-gnu-nopt/Dockerfile

@@ -15,7 +15,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   gdb \
   zlib1g-dev \
   lib32z1-dev \
-  xz-utils
+  xz-utils \
+  && rm -rf /var/lib/apt/lists/*
 
 
 COPY scripts/sccache.sh /scripts/

src/ci/docker/host-x86_64/i686-gnu/Dockerfile

@@ -15,7 +15,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   gdb \
   zlib1g-dev \
   lib32z1-dev \
-  xz-utils
+  xz-utils \
+  && rm -rf /var/lib/apt/lists/*
 
 
 COPY scripts/sccache.sh /scripts/

src/ci/docker/host-x86_64/mingw-check/Dockerfile

@@ -20,20 +20,20 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   libssl-dev \
   pkg-config \
-  mingw-w64
+  mingw-w64 \
+  && rm -rf /var/lib/apt/lists/*
 
 RUN curl -sL https://nodejs.org/dist/v16.9.0/node-v16.9.0-linux-x64.tar.xz | tar -xJ
 ENV PATH="/node-v16.9.0-linux-x64/bin:${PATH}"
 # Install es-check
 # Pin its version to prevent unrelated CI failures due to future es-check versions.
-RUN npm install es-check@6.1.1 -g
-RUN npm install eslint@8.6.0 -g
+RUN npm install es-check@6.1.1 eslint@8.6.0 -g
 
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
 COPY host-x86_64/mingw-check/reuse-requirements.txt /tmp/
-RUN pip3 install --no-deps --require-hashes -r /tmp/reuse-requirements.txt
+RUN pip3 install --no-deps --no-cache-dir --require-hashes -r /tmp/reuse-requirements.txt
 
 COPY host-x86_64/mingw-check/validate-toolstate.sh /scripts/
 COPY host-x86_64/mingw-check/validate-error-codes.sh /scripts/

src/ci/docker/host-x86_64/test-various/Dockerfile

@@ -21,7 +21,8 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-ins
   ovmf \
   qemu-efi-aarch64 \
   qemu-system-arm \
-  qemu-system-x86
+  qemu-system-x86 \
+  && rm -rf /var/lib/apt/lists/*
 
 RUN curl -sL https://nodejs.org/dist/v15.14.0/node-v15.14.0-linux-x64.tar.xz | \
   tar -xJ