contrib: switch the Windows bootstrap environment to py3.9

Use the built in `venv` module instead of `virtualenv` for simplicity, and
upgrade to a modern Mercurial that supports py3.

One issue here is that `venv` doesn't copy `python3{,Y}.dll` into the `Scripts`
subdirectory, so running the `hg.exe` that gets installed immediately fails on a
clean system because Python isn't in `PATH`.  There is code in `python.exe` to
detect when it is in a venv and add the original python install to the DLL
lookup path, which we don't do in `hg.exe` yet. The simple workaround for now is
to run the `hg` script with `python.exe`.  Typically `PYTHONLEGACYWINDOWSSTDIO`
must be set in the environment on Windows, but the clone process works without
it.

Differential Revision: https://phab.mercurial-scm.org/D11275

contrib/install-windows-dependencies.ps1

@@ -1,193 +1,189 b''
 # install-dependencies.ps1 - Install Windows dependencies for building Mercurial
 #
 # Copyright 2019 Gregory Szorc <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 # This script can be used to bootstrap a Mercurial build environment on
 # Windows.
 #
 # The script makes a lot of assumptions about how things should work.
 # For example, the install location of Python is hardcoded to c:\hgdev\*.
 #
 # The script should be executed from a PowerShell with elevated privileges
 # if you don't want to see a UAC prompt for various installers.
 #
 # The script is tested on Windows 10 and Windows Server 2019 (in EC2).
 
 $VS_BUILD_TOOLS_URL = "https://download.visualstudio.microsoft.com/download/pr/a1603c02-8a66-4b83-b821-811e3610a7c4/aa2db8bb39e0cbd23e9940d8951e0bc3/vs_buildtools.exe"
 $VS_BUILD_TOOLS_SHA256 = "911E292B8E6E5F46CBC17003BDCD2D27A70E616E8D5E6E69D5D489A605CAA139"
 
 $PYTHON37_x86_URL = "https://www.python.org/ftp/python/3.7.9/python-3.7.9.exe"
 $PYTHON37_x86_SHA256 = "769bb7c74ad1df6d7d74071cc16a984ff6182e4016e11b8949b93db487977220"
 $PYTHON37_X64_URL = "https://www.python.org/ftp/python/3.7.9/python-3.7.9-amd64.exe"
 $PYTHON37_x64_SHA256 = "e69ed52afb5a722e5c56f6c21d594e85c17cb29f12f18bb69751cf1714e0f987"
 
 $PYTHON38_x86_URL = "https://www.python.org/ftp/python/3.8.10/python-3.8.10.exe"
 $PYTHON38_x86_SHA256 = "ad07633a1f0cd795f3bf9da33729f662281df196b4567fa795829f3bb38a30ac"
 $PYTHON38_x64_URL = "https://www.python.org/ftp/python/3.8.10/python-3.8.10-amd64.exe"
 $PYTHON38_x64_SHA256 = "7628244cb53408b50639d2c1287c659f4e29d3dfdb9084b11aed5870c0c6a48a"
 
 $PYTHON39_x86_URL = "https://www.python.org/ftp/python/3.9.5/python-3.9.5.exe"
 $PYTHON39_x86_SHA256 = "505129081a839b699a6ab9064b441ad922ef03767b5dd4241fd0c2166baf64de"
 $PYTHON39_x64_URL = "https://www.python.org/ftp/python/3.9.5/python-3.9.5-amd64.exe"
 $PYTHON39_x64_SHA256 = "84d5243088ba00c11e51905c704dbe041040dfff044f4e1ce5476844ee2e6eac"
 
 # PIP 19.2.3.
 $PIP_URL = "https://github.com/pypa/get-pip/raw/309a56c5fd94bd1134053a541cb4657a4e47e09d/get-pip.py"
 $PIP_SHA256 = "57e3643ff19f018f8a00dfaa6b7e4620e3c1a7a2171fd218425366ec006b3bfe"
 
-$VIRTUALENV_URL = "https://files.pythonhosted.org/packages/66/f0/6867af06d2e2f511e4e1d7094ff663acdebc4f15d4a0cb0fed1007395124/virtualenv-16.7.5.tar.gz"
-$VIRTUALENV_SHA256 = "f78d81b62d3147396ac33fc9d77579ddc42cc2a98dd9ea38886f616b33bc7fb2"
-
 $INNO_SETUP_URL = "http://files.jrsoftware.org/is/5/innosetup-5.6.1-unicode.exe"
 $INNO_SETUP_SHA256 = "27D49E9BC769E9D1B214C153011978DB90DC01C2ACD1DDCD9ED7B3FE3B96B538"
 
 $MINGW_BIN_URL = "https://osdn.net/frs/redir.php?m=constant&f=mingw%2F68260%2Fmingw-get-0.6.3-mingw32-pre-20170905-1-bin.zip"
 $MINGW_BIN_SHA256 = "2AB8EFD7C7D1FC8EAF8B2FA4DA4EEF8F3E47768284C021599BC7435839A046DF"
 
-$MERCURIAL_WHEEL_FILENAME = "mercurial-5.1.2-cp27-cp27m-win_amd64.whl"
-$MERCURIAL_WHEEL_URL = "https://files.pythonhosted.org/packages/6d/47/e031e47f7fe9b16e4e3383da47e2b0a7eae6e603996bc67a03ec4fa1b3f4/$MERCURIAL_WHEEL_FILENAME"
-$MERCURIAL_WHEEL_SHA256 = "1d18c7f6ca1456f0f62ee65c9a50c14cbba48ce6e924930cdb10537f5c9eaf5f"
+$MERCURIAL_WHEEL_FILENAME = "mercurial-5.8.1-cp39-cp39-win_amd64.whl"
+$MERCURIAL_WHEEL_URL = "https://files.pythonhosted.org/packages/5c/b5/a5fa664761eef29b6c90eb24cb09ab8fe2c9b4b86af41d42c17476aff29b/$MERCURIAL_WHEEL_FILENAME"
+$MERCURIAL_WHEEL_SHA256 = "cbf3efa68fd7ebf94691bd00d2c86bbd47ca73620c8faa4f18b6c394bf5f82b0"
 
 $RUSTUP_INIT_URL = "https://static.rust-lang.org/rustup/archive/1.21.1/x86_64-pc-windows-gnu/rustup-init.exe"
 $RUSTUP_INIT_SHA256 = "d17df34ba974b9b19cf5c75883a95475aa22ddc364591d75d174090d55711c72"
 
 $PYOXIDIZER_URL = "https://github.com/indygreg/PyOxidizer/releases/download/pyoxidizer%2F0.16.0/PyOxidizer-0.16.0-x64.msi"
 $PYOXIDIZER_SHA256 = "2a9c58add9161c272c418d5e6dec13fbe648f624b5d26770190357e4d664f24e"
 
 # Writing progress slows down downloads substantially. So disable it.
 $progressPreference = 'silentlyContinue'
 
 function Secure-Download($url, $path, $sha256) {
     if (Test-Path -Path $path) {
         Get-FileHash -Path $path -Algorithm SHA256 -OutVariable hash
 
         if ($hash.Hash -eq $sha256) {
             Write-Output "SHA256 of $path verified as $sha256"
             return
         }
 
         Write-Output "hash mismatch on $path; downloading again"
     }
 
     Write-Output "downloading $url to $path"
     Invoke-WebRequest -Uri $url -OutFile $path
     Get-FileHash -Path $path -Algorithm SHA256 -OutVariable hash
 
     if ($hash.Hash -ne $sha256) {
         Remove-Item -Path $path
         throw "hash mismatch when downloading $url; got $($hash.Hash), expected $sha256"
     }
 }
 
 function Invoke-Process($path, $arguments) {
     echo "$path $arguments"
 
     $p = Start-Process -FilePath $path -ArgumentList $arguments -Wait -PassThru -WindowStyle Hidden
 
     if ($p.ExitCode -ne 0) {
         throw "process exited non-0: $($p.ExitCode)"
     }
 }
 
 function Install-Python3($name, $installer, $dest, $pip) {
     Write-Output "installing $name"
 
     # We hit this when running the script as part of Simple Systems Manager in
     # EC2. The Python 3 installer doesn't seem to like per-user installs
     # when running as the SYSTEM user. So enable global installs if executed in
     # this mode.
     if ($env:USERPROFILE -eq "C:\Windows\system32\config\systemprofile") {
         Write-Output "running with SYSTEM account; installing for all users"
         $allusers = "1"
     }
     else {
         $allusers = "0"
     }
 
     Invoke-Process $installer "/quiet TargetDir=${dest} InstallAllUsers=${allusers} AssociateFiles=0 CompileAll=0 PrependPath=0 Include_doc=0 Include_launcher=0 InstallLauncherAllUsers=0 Include_pip=0 Include_test=0"
     Invoke-Process ${dest}\python.exe $pip
 }
 
 function Install-Rust($prefix) {
     Write-Output "installing Rust"
     $Env:RUSTUP_HOME = "${prefix}\rustup"
     $Env:CARGO_HOME = "${prefix}\cargo"
 
     Invoke-Process "${prefix}\assets\rustup-init.exe" "-y --default-host x86_64-pc-windows-msvc"
     Invoke-Process "${prefix}\cargo\bin\rustup.exe" "target add i686-pc-windows-msvc"
     Invoke-Process "${prefix}\cargo\bin\rustup.exe" "install 1.52.0"
     Invoke-Process "${prefix}\cargo\bin\rustup.exe" "component add clippy"
 }
 
 function Install-Dependencies($prefix) {
     if (!(Test-Path -Path $prefix\assets)) {
         New-Item -Path $prefix\assets -ItemType Directory
     }
 
     $pip = "${prefix}\assets\get-pip.py"
 
     Secure-Download $PYTHON37_x86_URL ${prefix}\assets\python37-x86.exe $PYTHON37_x86_SHA256
     Secure-Download $PYTHON37_x64_URL ${prefix}\assets\python37-x64.exe $PYTHON37_x64_SHA256
     Secure-Download $PYTHON38_x86_URL ${prefix}\assets\python38-x86.exe $PYTHON38_x86_SHA256
     Secure-Download $PYTHON38_x64_URL ${prefix}\assets\python38-x64.exe $PYTHON38_x64_SHA256
     Secure-Download $PYTHON39_x86_URL ${prefix}\assets\python39-x86.exe $PYTHON39_x86_SHA256
     Secure-Download $PYTHON39_x64_URL ${prefix}\assets\python39-x64.exe $PYTHON39_x64_SHA256
     Secure-Download $PIP_URL ${pip} $PIP_SHA256
-    Secure-Download $VIRTUALENV_URL ${prefix}\assets\virtualenv.tar.gz $VIRTUALENV_SHA256
     Secure-Download $VS_BUILD_TOOLS_URL ${prefix}\assets\vs_buildtools.exe $VS_BUILD_TOOLS_SHA256
     Secure-Download $INNO_SETUP_URL ${prefix}\assets\InnoSetup.exe $INNO_SETUP_SHA256
     Secure-Download $MINGW_BIN_URL ${prefix}\assets\mingw-get-bin.zip $MINGW_BIN_SHA256
     Secure-Download $MERCURIAL_WHEEL_URL ${prefix}\assets\${MERCURIAL_WHEEL_FILENAME} $MERCURIAL_WHEEL_SHA256
     Secure-Download $RUSTUP_INIT_URL ${prefix}\assets\rustup-init.exe $RUSTUP_INIT_SHA256
     Secure-Download $PYOXIDIZER_URL ${prefix}\assets\PyOxidizer.msi $PYOXIDIZER_SHA256
 
     Install-Python3 "Python 3.7 32-bit" ${prefix}\assets\python37-x86.exe ${prefix}\python37-x86 ${pip}
     Install-Python3 "Python 3.7 64-bit" ${prefix}\assets\python37-x64.exe ${prefix}\python37-x64 ${pip}
     Install-Python3 "Python 3.8 32-bit" ${prefix}\assets\python38-x86.exe ${prefix}\python38-x86 ${pip}
 #    Install-Python3 "Python 3.8 64-bit" ${prefix}\assets\python38-x64.exe ${prefix}\python38-x64 ${pip}
     Install-Python3 "Python 3.9 32-bit" ${prefix}\assets\python39-x86.exe ${prefix}\python39-x86 ${pip}
     Install-Python3 "Python 3.9 64-bit" ${prefix}\assets\python39-x64.exe ${prefix}\python39-x64 ${pip}
 
     Write-Output "installing Visual Studio 2017 Build Tools and SDKs"
     Invoke-Process ${prefix}\assets\vs_buildtools.exe "--quiet --wait --norestart --nocache --channelUri https://aka.ms/vs/15/release/channel --add Microsoft.VisualStudio.Workload.MSBuildTools --add Microsoft.VisualStudio.Component.Windows10SDK.17763 --add Microsoft.VisualStudio.Workload.VCTools --add Microsoft.VisualStudio.Component.Windows10SDK --add Microsoft.VisualStudio.Component.VC.140"
 
     Write-Output "installing PyOxidizer"
     Invoke-Process msiexec.exe "/i ${prefix}\assets\PyOxidizer.msi /l* ${prefix}\assets\PyOxidizer.log /quiet"
 
     Install-Rust ${prefix}
 
     Write-Output "installing Inno Setup"
     Invoke-Process ${prefix}\assets\InnoSetup.exe "/SP- /VERYSILENT /SUPPRESSMSGBOXES"
 
     Write-Output "extracting MinGW base archive"
     Expand-Archive -Path ${prefix}\assets\mingw-get-bin.zip -DestinationPath "${prefix}\MinGW" -Force
 
     Write-Output "updating MinGW package catalogs"
     Invoke-Process ${prefix}\MinGW\bin\mingw-get.exe "update"
 
     Write-Output "installing MinGW packages"
     Invoke-Process ${prefix}\MinGW\bin\mingw-get.exe "install msys-base msys-coreutils msys-diffutils msys-unzip"
 
     # Construct a virtualenv useful for bootstrapping. It conveniently contains a
     # Mercurial install.
     Write-Output "creating bootstrap virtualenv with Mercurial"
-    Invoke-Process "$prefix\python27-x64\Scripts\virtualenv.exe" "${prefix}\venv-bootstrap"
+    Invoke-Process "$prefix\python39-x64\python.exe" "-m venv ${prefix}\venv-bootstrap"
     Invoke-Process "${prefix}\venv-bootstrap\Scripts\pip.exe" "install ${prefix}\assets\${MERCURIAL_WHEEL_FILENAME}"
 }
 
 function Clone-Mercurial-Repo($prefix, $repo_url, $dest) {
     Write-Output "cloning $repo_url to $dest"
     # TODO Figure out why CA verification isn't working in EC2 and remove
     # --insecure.
-    Invoke-Process "${prefix}\venv-bootstrap\Scripts\hg.exe" "clone --insecure $repo_url $dest"
+    Invoke-Process "${prefix}\venv-bootstrap\Scripts\python.exe" "${prefix}\venv-bootstrap\Scripts\hg clone --insecure $repo_url $dest"
 
     # Mark repo as non-publishing by default for convenience.
     Add-Content -Path "$dest\.hg\hgrc" -Value "`n[phases]`npublish = false"
 }
 
 $prefix = "c:\hgdev"
 Install-Dependencies $prefix
 Clone-Mercurial-Repo $prefix "https://www.mercurial-scm.org/repo/hg" $prefix\src