Actions: Check for realistic minimum CMake version requirementactions-cover-cmake-required-version

2 files changed, 75 insertions, 0 deletions

diff --git a/.github/workflows/cmake-required-version.yml b/.github/workflows/cmake-required-version.yml
new file mode 100644
index 00000000..5b77e9ab
--- /dev/null
+++ b/.github/workflows/cmake-required-version.yml
@@ -0,0 +1,72 @@
+#                          __  __            _
+#                       ___\ \/ /_ __   __ _| |_
+#                      / _ \\  /| '_ \ / _` | __|
+#                     |  __//  \| |_) | (_| | |_
+#                      \___/_/\_\ .__/ \__,_|\__|
+#                               |_| XML parser
+#
+# Copyright (c) 2022 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under the MIT license:
+#
+# Permission is  hereby granted,  free of charge,  to any  person obtaining
+# a  copy  of  this  software   and  associated  documentation  files  (the
+# "Software"),  to  deal in  the  Software  without restriction,  including
+# without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+# distribute, sublicense, and/or sell copies of the Software, and to permit
+# persons  to whom  the Software  is  furnished to  do so,  subject to  the
+# following conditions:
+#
+# The above copyright  notice and this permission notice  shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+# EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+# NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+# DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+# USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+name: Ensure realistic minimum CMake version requirement
+
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: '0 2 * * 5'  # Every Friday at 2am
+
+jobs:
+  checks:
+    name: Ensure realistic minimum CMake version requirement
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v2.4.0
+
+    - name: Install ancient CMake
+      run: |
+        set -ux
+
+        needed_cmake_version="$(sed -n 's/cmake_minimum_required(VERSION \(.*\))/\1/p' expat/CMakeLists.txt)"
+
+        installer_filename="cmake-${needed_cmake_version}-linux-x86_64.sh"
+        download_url="https://github.com/Kitware/CMake/releases/download/v${needed_cmake_version}/${installer_filename}"
+        wget --no-verbose "${download_url}"
+
+        chmod +x "${installer_filename}"
+        mkdir ~/.local/
+
+        ./"${installer_filename}" --prefix="${HOME}"/.local/ --skip-license
+
+        hash cmake  # or the running shell will keep using the cached old location
+        present_cmake_version="$(cmake --version | sed -n 's/cmake version \(.*\)/\1/p')"
+        [[ ${present_cmake_version} = ${needed_cmake_version} ]]
+
+    - name: Build libexpat using ancient CMake
+      run: |
+        set -ux
+        mkdir expat/build
+        cd expat/build
+        cmake --version
+        cmake ..
+        make VERBOSE=1 all test install DESTDIR="${PWD}/ROOT/"
+        find ROOT/ -not -type d | sort
diff --git a/expat/Changes b/expat/Changes
index 45334300..2cfb5ecd 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -7,6 +7,9 @@ Release x.x.x xxx xxxxxxxx xx xxxx
             #535  CMake: Make call to file(GENERATE [..]) work for CMake <3.19
        #527 #528  Address compiler warnings
 
+        Infrastructure:
+            #536  CI: Check for realistic minimum CMake version
+
 Release 2.4.2 Sun December 19 2021
         Other changes:
        #509 #510  Link againgst libm for function "isnan"