If statement invoked twice inside else statement in PowerShell script - powershell

Question

I am trying to execute PowerShell script which this code:
function Invoke-InstallationOfANewBuild() {
param (
$PathToTheLocalFolderWhereBuildsAreHeld = "$($env:USERPROFILE)\Desktop\",
$PlaceOnANetworkDriveWhereBuildsAreHeld = "\\r\P\Al\OSystem\D B\20\x64"
)
begin {
Write-Verbose -Message "Searching for a build with the biggest CL number a in build name in local folder." -Verbose
$CheckClNumberOfABuildOnADesktop = Get-ChildItem $PathToTheLocalFolderWhereBuildsAreHeld -Filter *.exe | Where-Object Name -Like '*OSystemInstaller_20*' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1
Write-Verbose -Message "Searching for a build with the biggest CL number in a build name on a network drive." -Verbose
$CheckClNumberOfABuildOnANetworkDrive = Get-ChildItem $PlaceOnANetworkDriveWhereBuildsAreHeld -Filter *.exe | Where-Object Name -NotMatch '.*NoDB\.exe$' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1
Write-Verbose -Message "Comparison of two hash sums. Please, wait." -Verbose
if ($CheckClNumberOfABuildOnADesktop)
{
$GetHashOfFileWhichIsPlacedOnDesktop = Get-MyFileHash $CheckClNumberOfABuildOnADesktop -Algorithm MD5
$GetHashOfFileWhichIsPlacedOnNetworkDrive = Get-MyFileHash $CheckClNumberOfABuildOnANetworkDrive -Algorithm MD5
}
else {
Write-Verbose -Message "There are no O System 20-1 (dev branch) builds in specified local folder. Extracting hash of the newest build in the network folder..." -Verbose
$GetHashOfFileWhichIsPlacedOnNetworkDrive = Get-MyFileHash $CheckClNumberOfABuildOnANetworkDrive -Algorithm MD5
}
if ($GetHashOfFileWhichIsPlacedOnDesktop.MD5 -ne $GetHashOfFileWhichIsPlacedOnNetworkDrive.MD5)
{
Write-Verbose -Message "Hash sum of a file which is placed on the desktop and file in the network drive are different or there is no O System 20-1 build in specified local folder. The newest build will be copied from the network folder to to the local folder." -Verbose
}
else {
Write-Verbose -Message "Hash sum of a file which is placed on the desktop and a file on the network drive are the same. No need to copy anything." -Verbose
}
}
process {
if ($GetHashOfFileWhichIsPlacedOnDesktop.MD5 -eq $GetHashOfFileWhichIsPlacedOnNetworkDrive.MD5){
Write-Verbose -Message "Installation... Please, wait." -Verbose
Get-ChildItem $PathToTheLocalFolderWhereBuildsAreHeld -Filter *.exe | Where-Object Name -Like '*OSystemInstaller_20*' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1 | ForEach-Object { & $_ -s2 -sp"-SilentInstallation=standalone -UpdateMaterials=yestoall -UpgradeDBIfRequired=yes"}
}
else {
Write-Verbose -Message "The newest build doesn't exist in specified folder. Downloading, please wait." -Verbose
$SelectTheNewestBuildInFolder = Get-ChildItem $PlaceOnANetworkDriveWhereBuildsAreHeld -Filter *.exe | Where-Object Name -NotMatch '.*NoDB\.exe$' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1 | Copy-Item -Destination $PathToTheLocalFolderWhereBuildsAreHeld
}
$HashNumberOfCopiedBuild = Get-MyFileHash $SelectTheNewestBuildInFolder -Algorithm MD5
if ($HashNumberOfCopiedBuild.MD5 -eq $GetHashOfFileWhichIsPlacedOnNetworkDrive.MD5) {
Write-Verbose -Message "Hash sum of the copied file and hash sum of original file are the same. Builds are the same." -Verbose
Write-Verbose -Message "Installation... Please, wait." -Verbose
Get-ChildItem $PathToTheLocalFolderWhereBuildsAreHeld -Filter *.exe | Where-Object Name -Like '*OSystemInstaller*' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1 | ForEach-Object {& $_ -s2 -sp"-SilentInstallation=standalone -UpdateMaterials=yestoall -UpgradeDBIfRequired=yes"}
}
else {
Write-Verbose -Message "Hash sum of the copied file and hash sum of original file are different. Builds are the same." -Verbose
} # [Block moved]
}
}
Invoke-InstallationOfANewBuild
But the if statement in last else statement works twice (so that installation process is invoked twice). How can I put if statement inside else statement so that it can be invoked only once? Example
1) If value is true in the else than execute installation and stop the script
2) If value is false in the else than move to if in else and execute installation from there.

Answer 1

process {
if ($GetHashOfFileWhichIsPlacedOnDesktop.MD5 -ne $GetHashOfFileWhichIsPlacedOnNetworkDrive.MD5) {
Get-ChildItem $PlaceOnANetworkDriveWhereBuildsAreHeld -Filter *.exe | Where-Object Name -NotMatch '.*NoDB\.exe$' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1 | Copy-Item -Destination $PathToTheLocalFolderWhereBuildsAreHeld
}
$CheckClNumberOfABuildOnADesktop = Get-ChildItem $PathToTheLocalFolderWhereBuildsAreHeld -Filter *.exe | Where-Object Name -NotMatch '.*NoDB\.exe$' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1
$HashNumberOfTheCopiedBuild = Get-MyFileHash $CheckClNumberOfABuildOnADesktop -Algorithm MD5
if ($HashNumberOfTheCopiedBuild.MD5 -eq $GetHashOfFileWhichIsPlacedOnNetworkDrive.MD5) {
Write-Verbose -Message "Installation... Please, wait." -Verbose
Get-ChildItem $PathToTheLocalFolderWhereBuildsAreHeld -Filter *.exe | Where-Object Name -Like '*OrthoSystemInstaller*' | ForEach-Object {
New-Object psobject -Property #{
No = [int]([regex]::Match($_.Name, '(?<=CL)\d+').Value)
Name = $_.FullName
}
} | Sort-Object No -Descending | Select-Object -ExpandProperty Name -First 1 | ForEach-Object {& $_ -s2 -sp"-SilentInstallation=standalone -UpdateMaterials=yestoall -UpgradeDBIfRequired=yes"}
}
else {
Write-Verbose -Message "H" -Verbose
}
}
}
All I did - remove installation from first if and put to the second if.