Add eigen install to CI yml

.gitlab-ci.yml

@@ -26,6 +26,9 @@ python3:
                 # Now we use the virtual env's python3
                 - python3 -m pip install --upgrade pip
                 - python3 -m pip install pycodestyle .
+                - cmake -P ./.gitlab/ci/eigen.cmake
+                - export $PATH=$PWD/eigen-3.3.9:$PATH
+                - export $EIGEN_DIR=$PWD/eigen-3.3.9:$EIGEN_DIR
         only:
                 - merge_requests
 
@@ -53,6 +56,9 @@ windows:
                 - $pwdpath = $pwd.Path
                 - Set-Item -Force -Path "env:PATH" -Value "$pwdpath\.gitlab;$pwdpath\.gitlab\cmake\bin;$env:PATH"
                 - Invoke-Expression -Command .gitlab/ci/ninja.ps1
+                - cmake -P ./gitlab/ci/eigen.cmake
+                - Set-Item -Force -Path "env:PATH" -Value "$pwdpath\eigen-3.3.9;$env:PATH"
+                - Set-Item -Force -Path "env:EIGEN_DIR" -Value "$pwdpath\eigen-3.3.9;$env:EIGEN_DIR"
                 - cmake -P .gitlab/ci/python.cmake
                 - Set-Item -Force -Path "env:PATH" -Value "$pwdpath\python-win64-3.9.0;$env:PATH"
                 - Set-Item -Force -Path "env:PYTHONPATH" -Value "$pwdpath\python-win64-3.9.0;$env:PYTHONPATH"

.gitlab/ci/eigen.cmake

@@ -33,4 +33,4 @@ execute_process(
 if (res)
     message(FATAL_ERROR
         "Failed to extract ${FILE_NAME}: ${err}")
-endif ()
\ No newline at end of file
+endif ()