update .appveyor to get openblas from numpy/tools/openblas_support

Author: mattip

.appveyor.yml

@@ -12,8 +12,6 @@ environment:
   global:
       MINGW_32: C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin
       MINGW_64: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin
-      OPENBLAS_32: "https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com/openblas-v0.3.7-win32-gcc_7_1_0.zip"
-      OPENBLAS_64: "https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com/openblas-v0.3.7-win_amd64-gcc_7_1_0.zip"
 
       CYTHON_BUILD_DEP: Cython
       TEST_MODE: fast
@@ -88,33 +86,18 @@ install:
      python -c "import sys,platform,struct;
      print(sys.platform, platform.machine(), struct.calcsize('P') * 8, )"
 
+  # Upgrade to the latest pip, setuptools, and wheel.
+  - python -m pip install -U pip setuptools wheel urllib3
+
   # Download and install static "openblas.a" to PYTHON\lib
   - ps: |
-      $PYTHON_ARCH = $env:PYTHON_ARCH
       $PYTHON = $env:PYTHON
-      If ($PYTHON_ARCH -eq 32) {
-          $OPENBLAS = $env:OPENBLAS_32
-      } Else {
-          $OPENBLAS = $env:OPENBLAS_64
-      }
-      $clnt = new-object System.Net.WebClient
-      $file = "$(New-TemporaryFile).zip"
-      $tmpdir = New-TemporaryFile | %{ rm $_; mkdir $_ }
+      $lib = python numpy/tools/openblas_support.py
       $destination = "$PYTHON\lib\openblas.a"
-      echo $file
-      echo $tmpdir
-      echo $OPENBLAS
-      $clnt.DownloadFile($OPENBLAS,$file)
-      Expand-Archive $file $tmpdir
-      rm $tmpdir\$PYTHON_ARCH\lib\*.dll.a
-      $lib = ls $tmpdir\$PYTHON_ARCH\lib\*.a | ForEach { ls $_ } | Select-Object -first 1
       echo $lib
       cp $lib $destination
       ls $destination
 
-  # Upgrade to the latest pip, setuptools, and wheel.
-  - python -m pip install -U pip setuptools wheel urllib3
-
   # Install build requirements.
   - pip install "%CYTHON_BUILD_DEP%" --install-option="--no-cython-compile"