Improve AppVeyor interface

[francois-keith]

• Add unit tests
• Compile in Debug

Note: 84d1393b0 removes the environment modification. This change of path removed the access to git.exe. This was a problem for calls to git -describe, required to have correct data in the pkg-config files.

[gergondet]

Hi Francois,

This looks good (especially the return code checking). However, as the comment indicates, putting the git folder in the path breaks project that use cmake_add_fortran_subdirectory because this puts the "wrong" sh in the path.

Can this be worked-around by providing the full git path to cmake rather than having the git directory in the path? (i.e. add -DGIT=/path/to/git to the cmake command)

[francois-keith]

:up: Passing the git via cmake works Also, I corrected the choco install command : the confirmation is now mandatory, otherwise it freezes waiting for the user to confirm.

[gergondet]

Good job :smile_cat:

[bchretien]

:+1: Thanks François!