Add appveyor.yml for Windows CI (#3)

Add appveyor.yml for windows CI

.travis.yml

@@ -12,11 +12,16 @@ before_install:
   - bash miniconda.sh -b -p $HOME/miniconda
   - export PATH="$HOME/miniconda/bin:$PATH"
   - hash -r
-  - conda config --set always_yes yes --set changeps1 no
-  - conda update -q conda
+  - conda config --set always_yes yes --set changeps1 no --set auto_update_conda no --set safety_checks disabled
+  - conda install -q conda pip
   # Useful for debugging any issues with conda
   - conda info -a
 
+  # Upgrade to the latest version of pip to avoid it displaying warnings
+  # about it being out of date.
+  - pip install --upgrade pip
+
+  # Create a conda environment using the required packages
   - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION pytorch scipy -c pytorch
   - source activate test-environment
   - pip install pytest pytest-cov codecov

appveyor.yml

@@ -0,0 +1,77 @@
+# Build only the master branch, tagged commits, and pull requests
+branches:
+  only:
+    - master
+    - /\d+\.\d+.*/
+
+# Don't run the (redundant) branch build with a pull request
+skip_branch_with_pr: true
+
+matrix:
+  fast_finish: true
+
+environment:
+  global:
+    # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
+    # /E:ON and /V:ON options are not enabled in the batch script intepreter
+    # See: http://stackoverflow.com/a/13751649/163740
+    CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\appveyor\\run_with_env.cmd"
+
+  PYTHONUNBUFFERED: 1
+  COVERAGE_DIR: ""
+  MINICONDA: C:\\Miniconda3-x64
+
+  matrix:
+    - PYTHON_VERSION: 3.7
+    - PYTHON_VERSION: 3.6
+
+
+init:
+  # If there is a newer build queued for the same PR, cancel this one.
+  # The AppVeyor 'rollout builds' option is supposed to serve the same
+  # purpose but it is problematic because it tends to cancel builds pushed
+  # directly to master instead of just PR builds (or the converse).
+  # credits: JuliaLang developers.
+  - ps: if ($env:APPVEYOR_PULL_REQUEST_NUMBER -and $env:APPVEYOR_BUILD_NUMBER -ne ((Invoke-RestMethod `
+        https://ci.appveyor.com/api/projects/$env:APPVEYOR_ACCOUNT_NAME/$env:APPVEYOR_PROJECT_SLUG/history?recordsNumber=50).builds | `
+        Where-Object pullRequestId -eq $env:APPVEYOR_PULL_REQUEST_NUMBER)[0].buildNumber) { `
+          throw "There are newer queued builds for this pull request, failing early." }
+  - ps: |
+      If (($env:SKIP_NOTAG -eq "true") -and ($env:APPVEYOR_REPO_TAG -ne "true")) {
+          throw "Skipping Python version, not a tag."
+      }
+
+install:
+  # conda 4.5.11 seems to expect that this directory exists already
+  - mkdir C:\Users\appveyor\.conda
+  - call %MINICONDA%\Scripts\activate.bat
+  # The safety checks are simply intended to ensure that there is enough disk space
+  # and the user has the necessary permissions to make environment changes. In a CI
+  # environment these are not necessary and slow things down noticeably on Windows.
+  - conda config --set always_yes yes --set changeps1 no --set auto_update_conda no --set safety_checks disabled
+  - conda install -q conda pip
+  - conda info -a
+
+  # Upgrade to the latest version of pip to avoid it displaying warnings
+  # about it being out of date.
+  - pip install --upgrade pip
+
+  # Create a conda environment using the required packages.
+  - conda create -q --yes -n test python=%PYTHON_VERSION% pytorch scipy -c pytorch
+  - activate test
+  - pip install pytest pytest-cov codecov
+  # list package versions
+  - conda list
+  # Using pip instead of setup.py ensures we install a non-compressed version of the package
+  # (as opposed to an egg), which is necessary to collect coverage.
+  # We still get the benefit of testing an installed version over the
+  # test version to iron out installation file-inclusion bugs but can
+  # also collect coverage.
+  - pip install .
+
+# Not a .NET project, build in the install setup
+build: false
+
+test_script:
+  - pytest tests
+