docker: Purge some build packages to slim the built image; refine syntax.

docker: Cleanup for consistent syntax.

docker/ubuntu/22.04/base-clang-10/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-base
 ENV CC clang-10
 ENV CXX clang++-10
 
+ENV packages="\
+clang-10 \
+llvm-10-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-10 llvm-10-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/base-clang-11/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-base
 ENV CC clang-11
 ENV CXX clang++-11
 
+ENV packages="\
+clang-11 \
+llvm-11-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-11 llvm-11-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/base-clang-12/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-base
 ENV CC clang-12
 ENV CXX clang++-12
 
+ENV packages="\
+clang-12 \
+llvm-12-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-12 llvm-12-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/base-clang-13/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-base
 ENV CC clang-13
 ENV CXX clang++-13
 
+ENV packages="\
+clang-13 \
+llvm-13-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-13 llvm-13-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/base-clang-14/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-base
 ENV CC clang-14
 ENV CXX clang++-14
 
+ENV packages="\
+clang-14 \
+llvm-14-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-14 llvm-14-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/base-gcc-10/Dockerfile

@@ -1,11 +1,16 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV CXX g++-10
 ENV CC gcc-10
+ENV CXX g++-10
+
+ENV packages="\
+gcc-10 \
+g++-10 \
+"
 
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y g++-10 gcc-10 \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true

docker/ubuntu/22.04/base-gcc-11/Dockerfile

@@ -1,11 +1,16 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV CXX g++-11
 ENV CC gcc-11
+ENV CXX g++-11
+
+ENV packages="\
+gcc-11 \
+g++-11 \
+"
 
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y g++-11 gcc-11 \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true

docker/ubuntu/22.04/base-gcc-12/Dockerfile

@@ -1,11 +1,16 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV CXX g++-12
 ENV CC gcc-12
+ENV CXX g++-12
+
+ENV packages="\
+gcc-12 \
+g++-12 \
+"
 
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y g++-12 gcc-12 \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true

docker/ubuntu/22.04/base-gcc-8/Dockerfile

@@ -1,11 +1,16 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV CXX g++-8
 ENV CC gcc-8
+ENV CXX g++-8
+
+ENV packages="\
+gcc-8 \
+g++-8 \
+"
 
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y g++-8 gcc-8 \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true

docker/ubuntu/22.04/base-gcc-9/Dockerfile

@@ -1,11 +1,16 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV CXX g++-9
 ENV CC gcc-9
+ENV CXX g++-9
+
+ENV packages="\
+gcc-9 \
+g++-9 \
+"
 
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y g++-9 gcc-9 \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true

docker/ubuntu/22.04/base/Dockerfile

@@ -2,9 +2,7 @@ FROM ubuntu:22.04
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-RUN true \
+ENV packages="\
-    && apt-get update \
-    && apt-get install --no-install-recommends -y \
 autoconf \
 autoconf-archive \
 autoconf2.13 \
@@ -29,29 +27,15 @@ RUN true \
 libzstd-dev \
 shtool \
 xz-utils \
-	&& update-ca-certificates \
+"
-    && apt-get clean \
-    && apt-get autoremove --purge -y \
-    && rm -rf /var/lib/apt/lists/* \
-    && true
 
-ENV ROCKSDB_VERSION=6.11.4
+ENV purges="\
-ARG skiprocks
+cmake \
+curl \
+"
 
-RUN true \
+ENV rocks_version=6.11.4
-	&& if test -n "$skiprocks"; then \
+ENV rocks_cmake="\
-		exit 0; \
-	fi \
-    && cd /usr/src \
-    && curl -sL https://codeload.github.com/facebook/rocksdb/tar.gz/refs/tags/v${ROCKSDB_VERSION} -o rocksdb-${ROCKSDB_VERSION}.tar.gz \
-    && tar xfvz rocksdb-${ROCKSDB_VERSION}.tar.gz \
-    && rm rocksdb-${ROCKSDB_VERSION}.tar.gz \
-    && ln -s /usr/src/rocksdb-${ROCKSDB_VERSION} /usr/src/rocksdb \
-    && cd /usr/src/rocksdb-${ROCKSDB_VERSION} \
-    && \
-    CFLAGS="-g0" \
-    LDFLAGS="-Wl,--strip-all" \
-    cmake -H. -Bbuild \
 -DCMAKE_RULE_MESSAGES:BOOL=OFF \
 -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
 -DWITH_JNI=0 \
@@ -66,15 +50,39 @@ RUN true \
 -DWITH_ZSTD=1 \
 -DUSE_RTTI=1 \
 -DBUILD_SHARED_LIBS=1 \
-    && cmake --build build --target install \
+"
+
+RUN true \
+&& apt-get update \
+&& apt-get install --no-install-recommends -y ${packages}\
+&& update-ca-certificates \
+&& apt-get clean \
+&& apt-get autoremove --purge -y \
+&& rm -rf /var/lib/apt/lists/* \
+&& mkdir /build \
+&& true
+
+ARG skiprocks
+RUN true \
+&& if test -n "$skiprocks"; then \
+	exit 0; \
+fi \
+&& cd /usr/src \
+&& curl -sL https://codeload.github.com/facebook/rocksdb/tar.gz/refs/tags/v${rocks_version} -o rocksdb-${rocks_version}.tar.gz \
+&& tar xfvz rocksdb-${rocks_version}.tar.gz \
+&& rm rocksdb-${rocks_version}.tar.gz \
+&& ln -s /usr/src/rocksdb-${rocks_version} /usr/src/rocksdb \
+&& cd /usr/src/rocksdb-${rocks_version} \
+&& \
+CFLAGS="-g0" \
+LDFLAGS="-Wl,--strip-all" \
+cmake -H. -Bbuild ${rocks_cmake} \
+&& cmake --build build --target install --parallel `nproc` \
 && rm -rf build \
-    && apt-get purge -y \
+&& apt-get purge -y ${purges} \
-        cmake \
-        curl \
 && apt-get clean \
 && apt-get autoremove --purge -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
 
-RUN mkdir /build
 WORKDIR /build

docker/ubuntu/22.04/built/Dockerfile

@@ -1,5 +1,19 @@
 FROM jevolk/construct:ubuntu-22.04-full-clang-14
 
+ENV purges="\
+autoconf \
+autoconf-archive \
+autoconf2.13 \
+automake \
+autotools-dev \
+build-essential \
+clang-14 \
+git \
+libtool \
+llvm-14-dev \
+shtool \
+"
+
 RUN true \
 && git clone https://github.com/jevolk/charybdis.git \
 && cd charybdis \
@@ -11,7 +25,7 @@ RUN true \
 && make install \
 && cd .. \
 && rm -rf charybdis \
-    && apt-get purge -y clang-14 llvm-14-dev \
+&& apt-get purge -y ${purges} \
 && apt-get autoremove --purge -y \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \

docker/ubuntu/22.04/full-clang-14/Dockerfile

@@ -3,10 +3,14 @@ FROM jevolk/construct:ubuntu-22.04-full
 ENV CC clang-14
 ENV CXX clang++-14
 
+ENV packages="\
+clang-14 \
+llvm-14-dev \
+"
+
 RUN true \
 && apt-get update \
-    && apt-get install --no-install-recommends -y clang-14 llvm-14-dev \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean -y \
 && rm -rf /var/lib/apt/lists/* \
 && true
-

docker/ubuntu/22.04/full/Dockerfile

@@ -1,16 +1,17 @@
 FROM jevolk/construct:ubuntu-22.04-base
 
-ENV DEBIAN_FRONTEND=noninteractive
+ENV packages="\
-
-RUN true \
-    && apt-get update \
-    && apt-get install --no-install-recommends -y \
 opencl-headers \
 libgraphicsmagick1-dev \
 libicu-dev \
 libjemalloc-dev \
 libopencl-clang-dev \
 libpng-dev \
+"
+
+RUN true \
+&& apt-get update \
+&& apt-get install --no-install-recommends -y ${packages} \
 && apt-get clean \
 && apt-get autoremove --purge -y \
 && rm -rf /var/lib/apt/lists/* \