Update PyManager to use 3.14.0b1 runtime

.github/workflows/build.yml

@@ -30,10 +30,30 @@ jobs:
         }
       shell: powershell
 
-    - name: Set up Python 3.14
-      uses: actions/setup-python@v5
-      with:
-        python-version: 3.14-dev
+    #- name: Set up Python 3.14
+    #  uses: actions/setup-python@v5
+    #  with:
+    #    python-version: 3.14-dev
+
+    # We move faster than GitHub's Python runtimes, so use NuGet instead
+    # One day we can use ourselves to download Python, but not yet...
+    - name: Set up NuGet
+      uses: nuget/[email protected]
+
+    - name: Set up Python 3.14.0b1
+      run: |
+        nuget install python -Version 3.14.0-b1 -x -o .
+        $py = Get-Item python\tools
+        Write-Host "Adding $py to PATH"
+        "$py" | Out-File $env:GITHUB_PATH -Encoding UTF8 -Append
+      working-directory: ${{ runner.temp }}
+
+    - name: Check Python version is 3.14.0b1
+      run: >
+        python -c "import sys;
+        print(sys.version);
+        print(sys.executable);
+        sys.exit(0 if sys.version_info[:5] == (3, 14, 0, 'beta', 1) else 1)"
 
     - name: Install build dependencies
       run: python -m pip install "pymsbuild>=1.2.0b1"

_msbuild.py

@@ -4,7 +4,7 @@
 
 
 DLL_NAME = "python314"
-EMBED_URL = "https://www.python.org/ftp/python/3.14.0/python-3.14.0a7-embed-amd64.zip"
+EMBED_URL = "https://www.python.org/ftp/python/3.14.0/python-3.14.0b1-embed-amd64.zip"
 
 def can_embed(tag):
     """Return False if tag doesn't match DLL_NAME and EMBED_URL.