add an auto-setup script for mariadb on windows

mariadb.bat

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+@echo off
+
+WHERE powershell.exe >nul 2>nul
+IF %ERRORLEVEL% NEQ 0 (
+    ECHO ERROR: PowerShell is not installed on this computer!
+    ECHO Please download it here:
+    ECHO https://github.com/PowerShell/PowerShell#get-powershell
+    ECHO.
+    ECHO Once it is installed, please re-launch mariadb.bat
+    pause >nul
+    exit
+)
+
+powershell -NoLogo -ExecutionPolicy Bypass -File "%~dp0\tools\setup_mariadb.ps1"
+pause >nul

tools/install_mariadb.bat

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+@echo off
+
+:: this file installs the mariadb service
+
+if not "%1"=="am_admin" (powershell start -verb runas '%0' am_admin & exit /b)
+mysqld.exe --install "MySQL"
+net start MySQL

tools/setup_mariadb.ps1

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+#Requires -Version 5.1
+
+function Ask-Continue { Write-Output ""; pause; Write-Output "" }
+
+Write-Output "This script will automatically install MariaDB and configure it for you."
+Write-Output "You may interrupt the installation by pressing CTRL+C or closing this window."
+Ask-Continue
+
+if (-Not (Select-String -Quiet -SimpleMatch -Pattern "db_password: ""ragnarok""" -LiteralPath "$PSScriptRoot\..\conf\global\sql_connection.conf")) {
+    Write-Output "WARNING: It seems you already configured the sql connection for your server."
+    Write-Output "If you decide to continue, your settings will be overwritten."
+    Ask-Continue
+}
+
+# step 1: install scoop
+if (-Not (Get-Command scoop -errorAction SilentlyContinue)) {
+    Set-ExecutionPolicy RemoteSigned -scope Process -Force # <= this will trigger a yes/no prompt if not already authorized
+    Invoke-Expression (new-object net.webclient).downloadstring('https://get.scoop.sh')
+    scoop update
+}
+
+# step 2: install mariadb
+if (Test-Path $env:USERPROFILE\scoop\apps\mariadb) {
+    # usually we'd want to capture the output of "scoop list mariadb", but it uses
+    # Write-Host, so we can't, hence why we check manually for the folder
+    Write-Output "WARNING: MariaDB is already installed!"
+    Write-Output "If you decide to continue, your hercules user password will be overwritten."
+    Ask-Continue
+} elseif (Get-Command mysqld -errorAction SilentlyContinue) {
+    Write-Output "ERROR: You already have a MySQL provider installed. To avoid conflict, MariaDB will not be installed."
+    Write-Output "If you wish to continue you will have to uninstall your current MySQL provider."
+    exit 1
+} else {
+    scoop install mariadb
+}
+
+# step 3: add the herc user, set up the new database
+$userpw = -join ((48..57) + (97..122) | Get-Random -Count 32 | % {[char]$_})
+$rootpw = -join ((48..57) + (97..122) | Get-Random -Count 32 | % {[char]$_})
+$maria_job = Start-Process -NoNewWindow -FilePath "mysqld.exe" -ArgumentList "--console" -PassThru -RedirectStandardError "$PSScriptRoot\maria.out"
+
+while (-Not $maria_job.HasExited) {
+    if ($lt -Lt 1 -And (Select-String -Quiet -SimpleMatch -Pattern "ready for connections" -LiteralPath "$PSScriptRoot\maria.out")) {
+@"
+CREATE DATABASE IF NOT EXISTS hercules;
+DROP USER IF EXISTS 'hercules'@'localhost';
+DROP USER IF EXISTS 'hercules'@'127.0.0.1';
+CREATE USER 'hercules'@'localhost' IDENTIFIED BY '$userpw';
+CREATE USER 'hercules'@'127.0.0.1' IDENTIFIED BY '$userpw';
+-- ALTER USER 'root'@'localhost' IDENTIFIED BY '$rootpw';
+GRANT ALTER,CREATE,SELECT,INSERT,UPDATE,DELETE,DROP,INDEX ON `hercules`.* TO 'hercules'@'localhost';
+GRANT ALTER,CREATE,SELECT,INSERT,UPDATE,DELETE,DROP,INDEX ON `hercules`.* TO 'hercules'@'127.0.0.1';
+FLUSH PRIVILEGES;
+USE `hercules`;
+\. $PSScriptRoot\..\sql-files\main.sql
+\. $PSScriptRoot\..\sql-files\logs.sql
+shutdown;
+\q
+"@ | mysql.exe -u root
+        $lt++
+    }
+    Start-Sleep 1
+}
+
+if ($lt -Lt 1) {
+    Write-Output "ERROR: MariaDB could not execute the query."
+    Write-Output "This might happen if your root user already has a password, or if the MySQL service is currently running."
+    $maria_job.close()
+    exit 1
+}
+
+# step 4: finish up
+@"
+sql_connection: {
+    db_username: "hercules"
+    db_password: "$userpw"
+    db_database: "hercules"
+}
+"@ | Out-File -Encoding UTF8 -LiteralPath "$PSScriptRoot\..\conf\global\sql_connection.conf"
+Remove-Item -Force -errorAction SilentlyContinue "$PSScriptRoot\maria.out"
+& "$PSScriptRoot\install_mariadb.bat" # <= we need admin permissions, so we use an external script
+Write-Output "========= ALL DONE ========="
+Write-Output ""
+Write-Output "Your hercules installation is now configured to use MariaDB."
+Write-Output "You can find the password in conf\global\sql_connection.conf."
+Write-Output ""
+Write-Output "If you want to start MariaDB on boot, use services.msc and set ""MySQL"" to Automatic."
+Write-Output ""
+Write-Output "Make sure you set a password for the root user. You can do this from the command line or from HeidiSQL."
+Write-Output "You can obtain HeidiSQL at https://www.microsoft.com/store/productId/9NXPRT2T0ZJF"