```powershell
#===================================CHANGE OS VALUE===========================================
#
# By Trentent Tye 2012-12-19
#
# This script will find all the applications in TEST and PROD and query the user to
# which application they want to change the OS VALUE in the OSD file. You will be given
# four options. 1 - Remove any OS VALUE from the file, 2 - Set an OS VALUE,
# 4 - Get current value (if exists)
#
#
#
#
#
#
#=====================================================================================
#=====================================================================================
#setting up variables
$APPV_Packages_Path = "\\jeeves\appv_images"
#Which environment to change?
$caption = "Choose Action";
$message = "Modify OS VALUE for which type of application?";
$Prod = new-Object System.Management.Automation.Host.ChoiceDescription "&Prod","Prod";
$Test = new-Object System.Management.Automation.Host.ChoiceDescription "&Test","Test";
$choices = [System.Management.Automation.Host.ChoiceDescription[]]($Test,$Prod);
$answer = $host.ui.PromptForChoice($caption,$message,$choices,0)
switch ($answer){
0 {"You entered Test"; $Env = "TEST"}
1 {"You entered Prod"; $Env = "PROD"}
}
#=====================================================================================
#=====================================================================================
#get list of applications (osd files) and put into a dictionary and
#display the key-value combos for user to enter a number
#if the user does not enter a correct choice, show the screen again.
Clear-Host
$completedsuccessfully = $TRUE
do {
$list = dir $APPV_Packages_Path\$ENV -include *.osd -recurse | Select-Object -ExpandProperty Name | sort
$n = 0
#create a dictionary and put all the OSD files into it and add a numerical value to each one
$dict = New-Object 'System.Collections.Generic.Dictionary[String,String]'
foreach ($i in $list) {
$n++
$dict.Add("$n","$i")
}
#format the dictionary nicely...
$dict | ft -auto
$appChoice = read-host -Prompt "Please select an application"
$appName = $dict.Get_Item("$appChoice")
if ($?) {
$completedsuccessfully = $TRUE
} else {
Clear-Host
Write-Host "An invalid choice (" -nonewline; Write-Host "$appChoice" -f Red -nonewline; Write-Host ") was selected";
$completedsuccessfully = $FALSE
}
} until ($completedsuccessfully)
Write-Host "You selected '" -nonewline; Write-Host "$appName" -f Yellow -nonewline; Write-Host "'";
#=====================================================================================
#=====================================================================================
#Setup functions for the next section
function GetOSValue() {
#get the path to the OSD file
#Get OSD file as an XML
$OSDFile = dir $APPV_Packages_Path\$ENV -include $appName -recurse
[xml]$OSD = Get-Content "$OSDFile"
Write-host "======================================================================"
Write-host ""
Write-host "Application: " -nonewline; write-host "$appName" -f Yellow;
$OSD.SOFTPKG.IMPLEMENTATION.OS | fl | Out-String
Write-host "======================================================================"
}
function RemoveOSValue() {
#get the path to the OSD file
#Get OSD file as an XML
$OSDFile = dir $APPV_Packages_Path\$ENV -include $appName -recurse
[xml]$OSD = Get-Content "$OSDFile"
Write-host "======================================================================"
Write-host ""
Write-host "Application: " -nonewline; write-host "$appName" -f Yellow;
Write-host "" ; write-host "Original value:"
$OSD.SOFTPKG.IMPLEMENTATION.OS | fl
Write-Host "Removing ALL OS Value(s)..."
#select OS node from the XML file
#remove the node, continue until no more OS Values exist
try {
do {
$node = $OSD.SelectSingleNode("//SOFTPKG/IMPLEMENTATION/OS")
[Void]$node.ParentNode.RemoveChild($node)
} until ( $? -eq $FALSE )
} catch {
write-host "Complete"
write-host ""
}
#backup the original file
$File = dir $APPV_Packages_Path\$ENV -include $appName -recurse
$fileObj = get-item $File
# Get the date
$DateStamp = get-date -uformat "%Y-%m-%d@%H-%M-%S"
#make our backup
copy "$File" "$File-$DateStamp"
# Display the new name
"Backup filename: $File-$DateStamp"
#save our file
$osd.Save($OSDfile)
Write-host "======================================================================"
}
function SetOSValue() {
#get the path to the OSD file
#Get OSD file as an XML
$OSDFile = dir $APPV_Packages_Path\$ENV -include $appName -recurse
[xml]$OSD = Get-Content "$OSDFile"
Write-host "======================================================================"
Write-host ""
Write-host "Application: " -nonewline; write-host "$appName" -f Yellow;
write-host ""
Write-Host "Setting OS Value..."
#select OS node from the XML file
# Creation of a nod ans his text
$xmlElt = $OSD.CreateElement("OS")
# Creation of an attribute in the principal nod
$xmlAtt = $OSD.CreateAttribute("VALUE")
#ask which OS you'd like
$caption = "Choose Action";
$message = "Which OS do you want to deploy this app?";
$2003 = new-Object System.Management.Automation.Host.ChoiceDescription "&3 - 2003 R2 x32","2003 R2 x32";
$2008 = new-Object System.Management.Automation.Host.ChoiceDescription "&8 - 2008 R2 x64","2008 R2 x64";
$choices = [System.Management.Automation.Host.ChoiceDescription[]]($2003,$2008);
$answer = $host.ui.PromptForChoice($caption,$message,$choices,0)
switch ($answer){
0 {$xmlAtt.Value = "Win2003TS"}
1 {$xmlAtt.Value = "Win2008R2TS64"}
}
# Appending the attribute to the element
$xmlElt.Attributes.Append($xmlAtt)
# Appending the new element to the proper location
[void]$OSD.SOFTPKG.IMPLEMENTATION.AppendChild($xmlElt)
$osd.Save($OSDfile)
Write-host "======================================================================"
}
#=====================================================================================
#=====================================================================================
#What would they like to do to the file?
function action() {
$caption = "Choose Action";
$message = "Modify OS VALUE for which type of application?";
$1 = new-Object System.Management.Automation.Host.ChoiceDescription "&1 Remove OS VALUE","Remove OS VALUE";
$2 = new-Object System.Management.Automation.Host.ChoiceDescription "&2 Set an OS VALUE","Set an OS VALUE";
$3 = new-Object System.Management.Automation.Host.ChoiceDescription "&3","";
$4 = new-Object System.Management.Automation.Host.ChoiceDescription "&4 Get current OS VALUE","Get current OS VALUE";
$choices = [System.Management.Automation.Host.ChoiceDescription[]]($1,$2,$3,$4);
$answer = $host.ui.PromptForChoice($caption,$message,$choices,3)
switch ($answer){
0 {RemoveOSValue;exit}
1 {RemoveOSValue;SetOSValue;exit}
2 {Write-Host "Incorrect Option, please try again"}
3 {GetOSValue}
}
}
#loop forever
$loop = 1
do {action} until ($loop = 0
```