Reason for Appveyor build fail I think

[maelle]

krlmlr/r-appveyor#57

And somehow I was not able to change my config file correctly.

[krlmlr]

Try in appveyor.yml:

environment:
  global:
    WARNINGS_ARE_ERRORS: 1

  matrix:
  - R_VERSION: release
    R_ARCH: x64

  - R_VERSION: patched

[maelle]

Oh that's nice, thanks. However it has not worked: https://ci.appveyor.com/project/masalmon/ropenaq

In both cases the first installation from Github fails. Rtools seem to be missed. Maybe I should try something with RTOOLS_VERSION and GCC_PATH?

[krlmlr]

Currently, Rtools are only installed if a src directory is present in the package (krlmlr/r-appveyor#55).

[maelle]

I made a PR to r-appveyor thanks to @jimhester's suggestion. It should avoid having the empty src directory.