Fix #21 JEnv is now asking the user to restart with admin rights so it can change system env

Author: FelixSelter

src/jenv.ps1

@@ -51,13 +51,26 @@ $javaPaths = (Get-Command java -All | Where-Object { $_.source -ne ((get-item $P
 if ($javaPaths.Length -gt 0) {
     Write-Host "JEnv is changing your environment variables. This process could take longer but it happens only when a java executable is found in your path"
     $userPath = [System.Environment]::GetEnvironmentVariable("PATH", "User").split(";", [System.StringSplitOptions]::RemoveEmptyEntries)
+    $systemPath = [System.Environment]::GetEnvironmentVariable("PATH", "MACHINE").split(";", [System.StringSplitOptions]::RemoveEmptyEntries)
     # Remove all javas from path
     $userPath = ($userPath | Where-Object { !$javaPaths.Contains($_ + "\java.exe") } ) -join ";"
+    $systemPath = ($systemPath | Where-Object { !$javaPaths.Contains($_ + "\java.exe") } ) -join ";"
     [System.Environment]::SetEnvironmentVariable("PATH", $userPath, [System.EnvironmentVariableTarget]::User) # Set globally
-    $userPath = ([System.Environment]::GetEnvironmentVariable("PATH", "MACHINE")) + $userPath
 
-    $Env:PATH = $userPath # Set for powershell users
-    Set-Content -path "jenv.path.tmp" -value $userPath # Create temp file so no restart of the active shell is required
+    try {
+        [System.Environment]::SetEnvironmentVariable("PATH", $systemPath, [System.EnvironmentVariableTarget]::Machine) # Set globally
+    }
+    catch [System.Management.Automation.MethodInvocationException] {
+        Write-Host JEnv wants to change your system environment vars. Therefore you need to restart it with administration rights. This should only once be required. If you dont want to, you have to call JEnv on every terminal opening to change your session vars
+    }
+    catch {
+        Write-Host fuck
+    }
+
+    $path = $userPath + ";" + $systemPath
+
+    $Env:PATH = $path # Set for powershell users
+    Set-Content -path "jenv.path.tmp" -value $path # Create temp file so no restart of the active shell is required
 }
 #endregion