contrib: install PyOxidizer in Linux and Windows environments stable

contrib: install PyOxidizer in Linux and Windows environments

For Linux, this was trivial.

For Windows, we need to teach the powershell script to install
Rust as well. This was also pretty straightforward.

Differential Revision: https://phab.mercurial-scm.org/D8468

--- a/contrib/automation/hgautomation/linux.py	Thu Apr 30 15:10:05 2020 +0200
+++ b/contrib/automation/hgautomation/linux.py	Sun Apr 19 14:16:24 2020 -0700
@@ -72,8 +72,10 @@
 
 chmod +x rustup-init
 sudo -H -u hg -g hg ./rustup-init -y
-sudo -H -u hg -g hg /home/hg/.cargo/bin/rustup install 1.31.1 1.34.2
+sudo -H -u hg -g hg /home/hg/.cargo/bin/rustup install 1.31.1 1.42.0
 sudo -H -u hg -g hg /home/hg/.cargo/bin/rustup component add clippy
+
+sudo -H -u hg -g hg /home/hg/.cargo/bin/cargo install --version 0.7.0 pyoxidizer
 '''
 
 

--- a/contrib/install-windows-dependencies.ps1	Thu Apr 30 15:10:05 2020 +0200
+++ b/contrib/install-windows-dependencies.ps1	Sun Apr 19 14:16:24 2020 -0700
@@ -64,6 +64,9 @@
 $MERCURIAL_WHEEL_URL = "https://files.pythonhosted.org/packages/6d/47/e031e47f7fe9b16e4e3383da47e2b0a7eae6e603996bc67a03ec4fa1b3f4/$MERCURIAL_WHEEL_FILENAME"
 $MERCURIAL_WHEEL_SHA256 = "1d18c7f6ca1456f0f62ee65c9a50c14cbba48ce6e924930cdb10537f5c9eaf5f"
 
+$RUSTUP_INIT_URL = "https://static.rust-lang.org/rustup/archive/1.21.1/x86_64-pc-windows-gnu/rustup-init.exe"
+$RUSTUP_INIT_SHA256 = "d17df34ba974b9b19cf5c75883a95475aa22ddc364591d75d174090d55711c72"
+
 # Writing progress slows down downloads substantially. So disable it.
 $progressPreference = 'silentlyContinue'
 
@@ -116,6 +119,20 @@
     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 "${prefix}\cargo\bin\rustup.exe" "install 1.42.0"
+    Invoke-Process "${prefix}\cargo\bin\rustup.exe" "component add clippy"
+
+    # Install PyOxidizer for packaging.
+    Invoke-Process "${prefix}\cargo\bin\cargo.exe" "install --version 0.7.0 pyoxidizer"
+}
+
 function Install-Dependencies($prefix) {
     if (!(Test-Path -Path $prefix\assets)) {
         New-Item -Path $prefix\assets -ItemType Directory
@@ -140,6 +157,7 @@
     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
 
     Write-Output "installing Python 2.7 32-bit"
     Invoke-Process msiexec.exe "/i ${prefix}\assets\python27-x86.msi /l* ${prefix}\assets\python27-x86.log /q TARGETDIR=${prefix}\python27-x86 ALLUSERS="
@@ -163,6 +181,8 @@
     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"
 
+    Install-Rust ${prefix}
+
     Write-Output "installing Visual C++ 9.0 for Python 2.7"
     Invoke-Process msiexec.exe "/i ${prefix}\assets\VCForPython27.msi /l* ${prefix}\assets\VCForPython27.log /q"