Stop using a RAM disk for the Windows tests

Author: pfmoore

.github/workflows/ci.yml

@@ -167,24 +167,13 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
 
-      # We use a RAMDisk on Windows, since filesystem IO is a big slowdown
-      # for our tests.
-      - name: Create a RAMDisk
-        run: ./tools/ci/New-RAMDisk.ps1 -Drive R -Size 1GB
-
-      - name: Setup RAMDisk permissions
-        run: |
-          mkdir R:\Temp
-          $acl = Get-Acl "R:\Temp"
-          $rule = New-Object System.Security.AccessControl.FileSystemAccessRule(
-              "Everyone", "FullControl", "ContainerInherit,ObjectInherit", "None", "Allow"
-          )
-          $acl.AddAccessRule($rule)
-          Set-Acl "R:\Temp" $acl
-
+      # We use C:\Temp (which is already available on the worker)
+      # as a temporary directory for all of the tests because the
+      # default value (under the user dir) is more deeply nested
+      # and causes tests to fail with "path too long" errors.
       - run: pip install nox
         env:
-          TEMP: "R:\\Temp"
+          TEMP: "C:\\Temp"
 
       # Main check
       - name: Run unit tests
@@ -194,7 +183,7 @@ jobs:
           -m unit
           --verbose --numprocesses auto --showlocals
         env:
-          TEMP: "R:\\Temp"
+          TEMP: "C:\\Temp"
 
       - name: Run integration tests (group 1)
         if: matrix.group == 1
@@ -203,7 +192,7 @@ jobs:
           -m integration -k "not test_install"
           --verbose --numprocesses auto --showlocals
         env:
-          TEMP: "R:\\Temp"
+          TEMP: "C:\\Temp"
 
       - name: Run integration tests (group 2)
         if: matrix.group == 2
@@ -212,7 +201,7 @@ jobs:
           -m integration -k "test_install"
           --verbose --numprocesses auto --showlocals
         env:
-          TEMP: "R:\\Temp"
+          TEMP: "C:\\Temp"
 
   tests-zipapp:
     name: tests / zipapp