From b6dcf3edf362cf43bb823947b0c9344a20e80f36 Mon Sep 17 00:00:00 2001
From: Niels Lohmann <mail@nlohmann.me>
Date: Sat, 10 Dec 2022 22:01:08 +0100
Subject: [PATCH] :green_heart: fix Ubuntu build

---
 .github/workflows/ubuntu.yml |  2 +-
 cmake/ci.cmake               | 32 +++++++++++---------------------
 2 files changed, 12 insertions(+), 22 deletions(-)

diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 5c13b61c2..b00d7f8e3 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -90,7 +90,7 @@ jobs:
         target: [ci_cmake_flags, ci_test_diagnostics, ci_test_noexceptions, ci_test_noimplicitconversions, ci_test_legacycomparison, ci_test_noglobaludls]
     steps:
       - name: Install build-essential
-        run: apt-get update ; apt-get install -y build-essential unzip clang wget lib32z1
+        run: apt-get update ; apt-get install -y build-essential unzip clang wget
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@latest
diff --git a/cmake/ci.cmake b/cmake/ci.cmake
index 874dda7e1..f3c4a1e8f 100644
--- a/cmake/ci.cmake
+++ b/cmake/ci.cmake
@@ -836,27 +836,17 @@ add_custom_target(ci_benchmarks
 ###############################################################################
 
 function(ci_get_cmake version var)
-    if (APPLE)
-        set(${var} ${PROJECT_BINARY_DIR}/cmake-${version}-Darwin64/CMake.app/Contents/bin/cmake)
-        add_custom_command(
-            OUTPUT ${${var}}
-            COMMAND wget -nc https://github.com/Kitware/CMake/releases/download/v${version}/cmake-${version}-Darwin64.tar.gz
-            COMMAND tar xfz cmake-${version}-Darwin64.tar.gz
-            COMMAND rm cmake-${version}-Darwin64.tar.gz
-            WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
-            COMMENT "Download CMake ${version}"
-        )
-    else()
-        set(${var} ${PROJECT_BINARY_DIR}/cmake-${version}-Linux-x86_64/bin/cmake)
-        add_custom_command(
-            OUTPUT ${${var}}
-            COMMAND wget -nc https://github.com/Kitware/CMake/releases/download/v${version}/cmake-${version}-Linux-x86_64.tar.gz
-            COMMAND tar xfz cmake-${version}-Linux-x86_64.tar.gz
-            COMMAND rm cmake-${version}-Linux-x86_64.tar.gz
-            WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
-            COMMENT "Download CMake ${version}"
-        )
-    endif()
+    set(${var} ${PROJECT_BINARY_DIR}/cmake-${version}/bin/cmake)
+    add_custom_command(
+        OUTPUT ${${var}}
+        COMMAND wget -nc https://github.com/Kitware/CMake/releases/download/v${version}/cmake-${version}.tar.gz
+        COMMAND tar xfz cmake-${version}.tar.gz
+        COMMAND rm cmake-${version}.tar.gz
+        COMMAND ${CMAKE_COMMAND} -S cmake-${version} -B cmake-${version}
+        COMMAND ${CMAKE_COMMAND} --build cmake-${version} --parallel 10
+        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+        COMMENT "Download CMake ${version}"
+    )
     set(${var} ${${var}} PARENT_SCOPE)
 endfunction()