Fix build-install.ps1 for Win10 compatibility

Fix tools/build-install.ps1 to work with Windows 10
and python 3.7.4.
Python 3.7.4 has an odd choice of pip install location. So add
helper tools/ci/PATH-add-pip-site.ps1.

tools/build-install.ps1

@@ -32,8 +32,10 @@ function Get-Command-Safely {
 
 #
 # make a good effort to get the path to the local python 3 installation
+# if $PTYHON is set, assume it's the PYTHON interpreter
 #
-Foreach ($pythonpath in @("$env:PYTHON",  # if $PTYHON is set, assume it's the PYTHON interpreter
+Foreach ($pythonpath in @("$PYTHON",
+                          "$env:PYTHON",
                           'python3.7',
                           'python3.7.exe',
                           'C:\Windows\py.exe',
@@ -88,13 +90,16 @@ if (-not (Test-Path-Safely $cv_whl)) {
 & $PYTHON -m twine check $cv_whl
 if ($LASTEXITCODE) { exit $LASTEXITCODE }
 
+#
 # install the wheel (must be done outside the project directory)
-Push-Location ..
+#
 
-& $PYTHON -m pip install -v $cv_whl
-if ($LASTEXITCODE) { exit $LASTEXITCODE }
+# add user.site to $env:PATH so it runs and avoids PATH warning
+.\tools\ci\PATH-add-pip-site.ps1
 
-& $PACKAGE_NAME --version
+Push-Location ..
+
+& $PYTHON -m pip install --force-reinstall --user --disable-pip-version-check -v $cv_whl
 if ($LASTEXITCODE) { exit $LASTEXITCODE }
 
 #
@@ -116,12 +121,12 @@ if ($LASTEXITCODE) { exit $LASTEXITCODE }
 Write-Host "
 To uninstall remaining package:
 
-        $PYTHON -m pip uninstall -y '$PACKAGE_NAME'
+        & `$PYTHON -m pip uninstall -y '$PACKAGE_NAME'
 "
 
 Write-Host "Success!
 
 To upload to pypi:
 
-    $PYTHON -m twine upload --verbose $cv_whl
+        & `$PYTHON -m twine upload --verbose $cv_whl
 "

tools/build-install.sh

@@ -104,7 +104,7 @@ fi
         user_arg=''
     fi
     set -x
-    ${PYTHON} -m pip install ${user_arg} --verbose "${cv_whl}"
+    ${PYTHON} -m pip install --disable-pip-version-check ${user_arg} --verbose "${cv_whl}"
 )
 
 # make sure to attempt uninstall if asked

tools/ci/PATH-add-pip-site.ps1

@@ -0,0 +1,29 @@
+# PATH-add-pip-site.ps1
+
+# update PATH with potential pip install locations on a Windows host
+function add_pip_site_PATH {
+    # presumes $PYTHON is set to the desired python interpreter
+    $usersite = & $PYTHON -c 'import site; print(site.USER_SITE);'
+    $userbase = & $PYTHON -c 'import site; print(site.USER_BASE);'
+    $userbasescript1 = Join-Path -Path "$userbase" -ChildPath "Script"
+    # --user install location on Windows 10 is annoyingly specific and not
+    # available in site module
+    $userbasescript2 = Join-Path -Path "$userbase" -ChildPath (& $PYTHON -c 'import sys; print(\"Python\" + str(sys.version_info[0]) + str(sys.version_info[1]));')
+    $userbasescript3 = Join-Path -Path "$userbasescript2" -ChildPath "Scripts"
+    $paths = $env:PATH.Split($([IO.Path]::PathSeparator))
+    ForEach ($path_ in @("$usersite",
+                         "$userbase",
+                         "$userbasescript1",
+                         "$userbasescript2",
+                         "$userbasescript3"))
+    {
+        if ($paths -contains $path_) {
+            Write-Debug "skip adding to env:PATH '$path_'"
+            continue
+        }
+        $env:PATH += "$([IO.Path]::PathSeparator)$path_"
+        Write-Debug "added to env:PATH '$path_'"
+    }
+}
+
+add_pip_site_PATH