Add a powershell script with batch helper to update the hosts file wi…

…th the WSL ip address.

bin/update-hosts-ips.bat

@@ -0,0 +1,41 @@
+@ECHO off
+
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+REM :: Some nice startup stuff
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+SETLOCAL ENABLEEXTENSIONS
+SET me=%~n0
+SET parent=%~dp0
+
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+REM :: Define the exit codes for the script. Powers of 2 for bitwise work.
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+SET /A errno=0
+
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+REM :: Define main variables for the script.
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+SET ps_script=%me%.ps1
+
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+REM :: Main script logic.
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+powershell -NoProfile -ExecutionPolicy Bypass -Command "Start-Process -Verb RunAs powershell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -NoLogo -File \"%parent%\%ps_script%\"'"
+
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+REM :: Exit paths should point to here.
+REM :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+:done
+IF %errno% NEQ 0 (
+  ECHO %me%: Script complete with errors.
+  PAUSE
+) ELSE (
+  ECHO %me%: Script completed successfully.
+)
+
+EXIT /B %errno%

bin/update-hosts-ips.ps1

@@ -0,0 +1,39 @@
+#Requires -RunAsAdministrator
+
+# Any host line that contains this TLD will have the IP address updated.
+$wslTld = 'test'
+
+$file = $env:windir + '\System32\drivers\etc\hosts'
+$regex = '(?<=^\s*)([^\s]+)(?=.*\.' + $wslTld + '(\s+|$))'
+
+# Get the current IP address of the wsl instance.
+$wslIp = $(wsl -e hostname -I).Trim()
+
+Write-Host "Updating hosts file for TLD [.$wslTld] with WSL IP [$wslIp]."
+
+# Use the regex to replace existing IP addresses with the
+# current wsl IP address for the wsl TLD defined above.
+(Get-Content $file) -replace $regex, $wslIp | Set-Content $file
+
+Write-Host 'hosts file updated.'
+
+# If running in the console, wait for input before closing.
+if ($Host.Name -eq "ConsoleHost") {
+    Write-Host ""
+    Write-Host "Press any key to continue or wait 3 seconds..."
+
+    # Make sure buffered input doesn't "press a key" and skip the ReadKey().
+    $Host.UI.RawUI.FlushInputBuffer()
+
+    # Wait for a set time or until a key is pressed.
+    $counter = 0
+    while (!$Host.UI.RawUI.KeyAvailable -and $counter -lt 3000) {
+        Start-Sleep -Milliseconds 100
+        $counter = $counter + 100
+    }
+
+    # Consume the key if one was pressed.
+    if ($Host.UI.RawUI.KeyAvailable) {
+        $Host.UI.RawUI.ReadKey("NoEcho, IncludeKeyUp") > $null
+    }
+}