bpo-36441: Fixes creating a venv when debug binaries are installed. (#12566)

Lib/venv/__init__.py

@@ -195,6 +195,9 @@ class EnvBuilder:
                     src = os.path.join(os.path.dirname(src), basename + ext)
                 else:
                     src = srcfn
+                if not os.path.exists(src):
+                    logger.warning('Unable to copy %r', src)
+                    return
 
             shutil.copyfile(src, dst)
 

Misc/NEWS.d/next/Windows/2019-03-26-11-46-15.bpo-36441.lYjGF1.rst

+Fixes creating a venv when debug binaries are installed.

Tools/msi/lib/lib_files.wxs

@@ -69,6 +69,15 @@
     </Fragment>
     
     <Fragment>
+        <!-- The auto-generated directory is not available when building debug binaries -->
+        <DirectoryRef Id="Lib">
+            <Directory Id="Lib_venv__d" Name="venv">
+                <Directory Id="Lib_venv_scripts__d" Name="scripts">
+                    <Directory Id="Lib_venv_scripts_nt__d" Name="nt" />
+                </Directory>
+            </Directory>
+        </DirectoryRef>
+
         <ComponentGroup Id="lib_extensions_d">
             <?foreach ext in $(var.exts)?>
             
@@ -87,6 +96,12 @@
             <Component Id="sqlite3_d.pdb" Directory="DLLs" Guid="*">
                 <File Name="sqlite3_d.pdb" KeyPath="yes" />
             </Component>
+            <Component Id="venvlauncher_d.exe" Directory="Lib_venv_scripts_nt__d" Guid="*">
+                <File Name="python_d.exe" Source="venvlauncher_d.exe" KeyPath="yes" />
+            </Component>
+            <Component Id="venvwlauncher_d.exe" Directory="Lib_venv_scripts_nt__d" Guid="*">
+                <File Name="pythonw_d.exe" Source="venvwlauncher_d.exe" KeyPath="yes" />
+            </Component>
         </ComponentGroup>
     </Fragment>
     <Fragment>