automation: set PATH when building on Windows
Sometime in the 6.2 release cycle the Windows building automation
broke. Building the wheel and even PyOxidizer based installers now fails
with:
```
Exception: PowerShell execution failed: error: subprocess-exited-with-error
Getting requirements to build wheel did not run successfully.
exit code: 1
[1 lines of output]
Unable to find a working hg binary to extract the version from the repository tags
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
```
I have a hunch this is a regression from upgrading pip in 1c00777702da,
but I haven't verified this. It may not be, as PyOxidizer has its own
bundled Python/pip. So maybe it is something in `setup.py`.
--- a/contrib/automation/hgautomation/windows.py Sun Jul 17 15:37:34 2022 -0700
+++ b/contrib/automation/hgautomation/windows.py Tue Jul 19 18:32:40 2022 -0700
@@ -45,6 +45,7 @@
'''.lstrip()
BUILD_INNO_PYTHON3 = r'''
+$Env:PATH = "C:\hgdev\venv-bootstrap\Scripts;$Env:PATH"
$Env:RUSTUP_HOME = "C:\hgdev\rustup"
$Env:CARGO_HOME = "C:\hgdev\cargo"
Set-Location C:\hgdev\src
@@ -56,6 +57,7 @@
BUILD_WHEEL = r'''
+$Env:PATH = "C:\hgdev\venv-bootstrap\Scripts;$Env:PATH"
Set-Location C:\hgdev\src
C:\hgdev\python{python_version}-{arch}\python.exe -m pip wheel --wheel-dir dist .
if ($LASTEXITCODE -ne 0) {{
@@ -64,6 +66,7 @@
'''
BUILD_WIX_PYTHON3 = r'''
+$Env:PATH = "C:\hgdev\venv-bootstrap\Scripts;$Env:PATH"
$Env:RUSTUP_HOME = "C:\hgdev\rustup"
$Env:CARGO_HOME = "C:\hgdev\cargo"
Set-Location C:\hgdev\src