Powershell scripts to support installation from source. (#8651)

* Powershell scripts to support installation from source.

* Update Install-gui.ps1

* Update Install-gui.ps1

* Linter fixes

* Revert "Linter fixes"

This reverts commit 8c4e073671.

* Linter fixes

* Minor textual changes. Updated encoding/line-endings to UTF-8/LF. Git on Windows should autocrlf as necessary.

Install-gui.ps1

@@ -0,0 +1,31 @@
+$ErrorActionPreference = "Stop"
+
+if ($null -eq (Get-ChildItem env:VIRTUAL_ENV -ErrorAction SilentlyContinue))
+{
+    Write-Output "This script requires that the Chia Python virtual environment is activated."
+    Write-Output "Execute '.\venv\Scripts\Activate.ps1' before running."
+    Exit 1
+}
+
+if ($null -eq (Get-Command node -ErrorAction SilentlyContinue))
+{
+    Write-Output "Unable to find Node.js"
+    Exit 1
+}
+
+Write-Output "Running 'git submodule update --init --recursive'."
+Write-Output ""
+git submodule update --init --recursive
+
+Set-Location chia-blockchain-gui
+
+$ErrorActionPreference = "SilentlyContinue"
+npm install --loglevel=error
+npm audit fix
+npm run build
+py ..\installhelper.py
+
+Write-Output ""
+Write-Output "Chia blockchain Install-gui.ps1 completed."
+Write-Output ""
+Write-Output "Type 'cd chia-blockchain-gui' and then 'npm run electron' to start the GUI."

Install.ps1

@@ -0,0 +1,63 @@
+$ErrorActionPreference = "Stop"
+
+if ([Environment]::Is64BitOperatingSystem -eq $false)
+{
+    Write-Output "Chia requires a 64-bit Windows installation"
+    Exit 1
+}
+
+if ((Get-Item "$env:windir\System32\msvcp140.dll").Exists -eq $false)
+{
+    Write-Output "Unable to find Visual C++ Runtime DLLs"
+    Write-Output ""
+    Write-Output "Download and install the Visual C++ Redistributable for Visual Studio 2019 package from:"
+    Write-Output "https://visualstudio.microsoft.com/downloads/#microsoft-visual-c-redistributable-for-visual-studio-2019"
+    Exit 1
+}
+
+if ($null -eq (Get-Command git -ErrorAction SilentlyContinue))
+{
+    Write-Output "Unable to find git"
+    Exit 1
+}
+
+git submodule update --init mozilla-ca
+
+if ($null -eq (Get-Command py -ErrorAction SilentlyContinue))
+{
+    Write-Output "Unable to find py"
+    Write-Output "Note the check box during installation of Python to install the Python Launcher for Windows."
+    Write-Output ""
+    Write-Output "https://docs.python.org/3/using/windows.html#installation-steps"
+    Exit 1
+}
+
+$pythonVersion = (py --version).split(" ")[1]
+if ([version]$pythonVersion -lt [version]"3.7.0")
+{
+    Write-Output "Found Python version:" $pythonVersion
+    Write-Output "Installation requires Python 3.7 or later"
+    Exit 1
+}
+Write-Output "Python version is:" $pythonVersion
+
+py -m venv venv
+.\venv\Scripts\Activate.ps1
+
+py -m pip install pip --upgrade
+pip install --upgrade setuptools
+pip install --upgrade wheel
+pip install --extra-index-url https://pypi.chia.net/simple/ miniupnpc==2.2.2
+pip install --editable . --extra-index-url https://pypi.chia.net/simple/
+
+Write-Output ""
+Write-Output "Chia blockchain .\Install.ps1 complete."
+Write-Output "For assistance join us on Keybase in the #support chat channel:"
+Write-Output "https://keybase.io/team/chia_network.public"
+Write-Output ""
+Write-Output "Try the Quick Start Guide to running chia-blockchain:"
+Write-Output "https://github.com/Chia-Network/chia-blockchain/wiki/Quick-Start-Guide"
+Write-Output ""
+Write-Output "To install the GUI type '.\Install-gui.ps1' after '.\venv\scripts\Activate.ps1'."
+Write-Output ""
+Write-Output "Type '.\venv\Scripts\Activate.ps1' and then 'chia init' to begin."