Use pre-compiled CMake.

docker/cmake.sh

@@ -4,21 +4,15 @@ set -x
 set -euo pipefail
 
 main() {
-    local version=3.16.5
+    local version=3.17.2
 
-    local dependencies=(
-        curl
-        g++
-        libssl-dev
-        make
-        zlib1g-dev
-    )
+    local dependencies=(curl)
 
     apt-get update
     local purge_list=()
     for dep in ${dependencies[@]}; do
         if ! dpkg -L $dep; then
-            apt-get install --no-install-recommends --assume-yes $dep
+            apt-get install --assume-yes --no-install-recommends $dep
             purge_list+=( $dep )
         fi
     done
@@ -27,21 +21,17 @@ main() {
 
     pushd $td
 
-    curl https://cmake.org/files/v${version%.*}/cmake-$version.tar.gz | \
-        tar --strip-components 1 -xz
+    curl -sSfL "https://github.com/Kitware/CMake/releases/download/v${version}/cmake-${version}-Linux-x86_64.sh" -o cmake.sh
+    sh cmake.sh --skip-license --prefix=/usr/local
 
-    ./bootstrap
-    make -j$(nproc)
-    make install
-
-    # clean up
     popd
 
     if (( ${#purge_list[@]} )); then
-      apt-get purge --auto-remove -y ${purge_list[@]}
+      apt-get purge --assume-yes --auto-remove ${purge_list[@]}
     fi
 
     rm -rf $td
+    rm -rf /var/lib/apt/lists/*
     rm $0
 }