message: Only run appveyor on the master branch and on PRs
diff: @@ -7,6 +7,12 @@ environment:
  - TARGET: x86_64-pc-windows-msvc
  MSYS2_BITS: 64
  +# branches to build
  +branches:
  + # whitelist
  + only:
  + - master
  +
  install:
  - set PATH=C:\Program Files\Git\mingw64\bin;%PATH%
  - curl -sSf -o rustup-init.exe https://win.rustup.rs/
  