Test FetchContent support

.github/actions/integration/action.yml

@@ -1,6 +1,13 @@
 # action.yml
 name: 'Checks installation process'
 description: 'Checks installation process'
+inputs:
+  branch:  # Current branch
+    description: ' Current branch'
+    required: false
+    default: 'main'
 runs:
   using: 'docker'
   image: 'Dockerfile'
+  args:
+    - ${{ inputs.branch }}

.github/actions/integration/entrypoint.sh

@@ -1,21 +1,28 @@
 #!/bin/sh -l
 set -e
 
-echo "::group::Configure EVE"
+echo "::group::Prepare EVE repository for branch " $1
 mkdir build && cd build
 cmake .. -G Ninja
-echo "::endgroup::"
-
-echo "::group::Install EVE"
 ninja install | grep cmake
+CURRENT_SHA1=`git rev-parse HEAD`
 cd ..
 echo "::endgroup::"
 
-echo "::group::Compile EVE-dependent project"
+echo "::group::Test EVE via the install target"
 mkdir install-test && cd install-test
 cmake ../integration/install-test -G Ninja
 ninja test_eve
 ./test_eve
+cd ..
+echo "::endgroup::"
+
+echo "::group::Test EVE via FetchContent"
+mkdir fetch-test && cd fetch-test
+cmake ../integration/fetch-test -G Ninja -DEVE_SHA1=$1
+ninja test_eve
+./test_eve
+cd ..
 echo "::endgroup::"
 
 return 0;

.github/workflows/main.yml

@@ -19,6 +19,8 @@ jobs:
         uses: actions/checkout@v2
       - name: Configure, install the library and check for proper installation
         uses: ./.github/actions/integration
+        with:
+          branch: '${{ github.head_ref }}'
 
   specials:
     needs: install

integration/fetch-test/CMakeLists.txt

@@ -0,0 +1,24 @@
+##==================================================================================================
+##  EVE - Expressive Vector Engine
+##  Copyright : EVE Contributors & Maintainers
+##  SPDX-License-Identifier: MIT
+##==================================================================================================
+cmake_minimum_required(VERSION 3.19)
+project(eve-install-test LANGUAGES CXX)
+
+message(STATUS "Testing FetchContent for branch ${EVE_SHA1}")
+
+# Enable FetchContent
+include(FetchContent)
+
+# Retrieve EVE
+FetchContent_Declare(eve
+  GIT_REPOSITORY https://github.com/jfalcou/eve.git
+  GIT_TAG        ${EVE_SHA1}
+  )
+
+FetchContent_MakeAvailable(eve)
+
+# make available
+add_executable(test_eve ../main.cpp)
+target_link_libraries(test_eve PUBLIC eve::eve)

integration/install-test/CMakeLists.txt

@@ -3,7 +3,7 @@
 ##  Copyright : EVE Contributors & Maintainers
 ##  SPDX-License-Identifier: MIT
 ##==================================================================================================
-cmake_minimum_required(VERSION 3.22)
+cmake_minimum_required(VERSION 3.19)
 project(eve-install-test LANGUAGES CXX)
 
 ## Points to the installation folder for EVE