How do you exit from an invoke-command script block running on a remote server? I have tried next.
Here is my code:
$Res = Invoke-Command -Session $Ses -ArgumentList ($ROOTdir, $PARAMS.SYS, $PARAMS.main, $PARAMS.zip) -ScriptBlock {
Param($ROOTdir, $SYS, $MAIN, $ZIP)
$list | %{
$completed = $false
$retrycount = 1
while (-not $completed) {
try {
$Copytime = (Measure-Command {
Copy-Item -Path $_.FullName -Destination ($SYS.KITCHENdir) -Force -ErrorVariable copyerror
}).TotalSeconds
$completed = $true
} catch {
if ($retrycount -gt $MAIN.Retry ) {
break or exit #HOW STOP EXECUTING NEXT STEPS AND EXIT
} else {
Start-Sleep $MAIN.DelayRetry
$retrycount++
}
}
}
#IF copy bad result need stop and exit
#The final one can produce flavors here, but it does not look quite kosher
#next steps
}
I suspect you want to use the Exit keyword.
"The exit keyword is used to exit from contexts; it will exit the
(currently running) context where your code is running. This means
that if you use this keyword in a script, and launch the script
directly from your console, it will exit both the script and the
console since they're both running in the same context. However, if
you use the exit keyword in a function within the script, and call
that function from the same script, it will just exit the script and
not the entire console. The exit keyword is best used in functions,
and when those functions are called in a script. It's a great way to
terminate execution of functions."
https://www.pluralsight.com/blog/it-ops/powershell-terminating-code-execution
Related
I have the function below where i pass in two arrays. I would like the script to exit on the first occurrence of an error.
I tried different variations but i can't make the script to stop early.
I have tried to use ($LastExitCode -eq 0) it doesn't seem to work, all the scripts still continue running.
I also tried If ($? -ne "True") it doesn't work either, all the tests don't run at all.
function Run-Coverage {
param($openCoverPath,$testExecutorPath,$dllPath,$output)
& $openCoverPath `
-threshold:100 `
-register:user `
-target:$testExecutorPath `
-targetargs:"$dllPath" `
-output:$output `
}
function Run-Tests
{
param($Dll,$Xmls)
for ($i=0; $i -lt $Dlls.length; $i++)
{
$TestParam = $Dlls[$i]
$resultParam = $Xmls[$i]
$dllPath = -join("`"",$projectBasePath,$TestParam," ","/TestCaseFilter:`"(TestCategory!=RequiresData)`"","`"")
$output = -join($outputPath,$resultParam)
try
{
Run-Coverage -openCoverPath $openCoverPath -testExecutorPath $testExecutorPath -dllPath $dllPath -output $output
}
catch
{
Write-Host "Exiting loop"
break
}
}
}
If you add [CmdletBinding()] as the first line inside the function (above the param() block), you can call the function with added Common parameters like ErrorAction, ErrorVariable etc.
try {
Run-Coverage -openCoverPath $openCoverPath -testExecutorPath $testExecutorPath -dllPath $dllPath -output $output -ErrorAction Stop
}
catch {
throw
}
As #Paolo answered - you can do it easily using $ErrorActionPreference = "Stop" or make it a little bit custom using:
trap {
Write-Host "Exception occured: $($_.Exception.Message)";
#Some action to do with the error
exit 1;
}
I am trying to test a Function in an script file that is testing the connection to a PC. I am trying to do that by calling the mock "Test-Connection" from an other Script in an Pester Test.
When I run Temp.Testing.ps1
describe 'Test Error Handling' {
$myDir = Split-Path -parent $PSCommandPath
$testFile = "$myDir\TryToRenameComputer.ps1"
.$testFile
mock 'Test-Connection' { $false }
$pathForLogs = "C:\temp\Logs.txt"
it 'exits if Test-Connection Failed'{
TryToRenameComputer -OldName "OldName"
Assert-MockCalled 'Test-Connection' -Times 1 -Scope It
}
}
TryToRenameComputer.ps1
function TryToRenameComputer {
param([parameter(Mandatory=$true)]
[string]$computerName)
if (!(Test-Connection -ComputerName $computerName -Quiet)) {
exit
}
}
it skips the it-statement and shows me no errors. Only "Describing Test Error Handling".
Expected Result:
Actual Result:
I already tried running a other Function and it worked.
Also when I am running multiple it-statements all get skipped when I call the Function in 1 it-statement.
I also tried rewriting it so it is no function anymore and it worked.
The problem is likely occurring because of the exit statement in your code. This is getting executed because in the if statement before it you are using -not via its shorthand of ! to test for the result of Test-Connection and because your Mock sets Test-Connection to $false.
By using exit you are immediately terminating the PowerShell host, which is then stopping your tests from executing/completing.
Instead of using exit consider using break or return to stop the execution of the function without terminating the script. Or if you potentially do want to terminate the script, consider using throw as you can then stop the parent script when an exception has occurred.
You could then modify your tests to test for that throw as that is the result you expect to occur when test-connection returns $false. For example:
function TryToRenameComputer {
param([parameter(Mandatory=$true)]
[string]$computerName)
if (!(Test-Connection -ComputerName $computerName -Quiet)) {
Thow "Could not connect to $computerName"
}
}
describe 'Test Error Handling' {
$myDir = Split-Path -parent $PSCommandPath
$testFile = "$myDir\TryToRenameComputer.ps1"
.$testFile
mock 'Test-Connection' { $false }
$pathForLogs = "C:\temp\Logs.txt"
it 'Throws an error if Test-Connection Failed'{
{ TryToRenameComputer -OldName "OldName" } | Should -Throw
Assert-MockCalled 'Test-Connection' -Times 1 -Scope It
}
}
There's no easy way to handle exit in your tests and its generally a bit of an anti-pattern when you're writing code for automation.
I am not quite sure how to explain my problem, but I have a function that installs Office, imagine the person that runs this script does not have internet connection or does not have enough space on her hard drive. I have the XML file set to hide the setup interface so the user can't see the installation process. Just to be clear all my code works fine, just want add this feature so that if something goes wrong while the user runs the script I know where the error was.
This is my function:
Function Install-Office365OfficeProducts{
Write-Host ""
Start-Sleep -Seconds 5
Write-Host "Installing Office 365 ProPlus..."
# Installing Office 365 ProPlus
Install-Office365Product -path "$PSScriptRoot\setup.exe" -xmlPath "$PSScriptRoot\InstallO365.xml"
This is what I have tried:
if (Install-Office365OfficeProducts -eq 0) {
Write-Host "FAILED"}
I am very confused, I thought that a function that runs with no error returns 1 and when it runs with errors returns 0.
Also have tried to put the code like this:
try {
Install-Office365Product -path "$PSScriptRoot\setup.exe" -xmlPath "$PSScriptRoot\InstallO365.xml"
} catch {
Write-Host "Failed!"
}
EDIT:
Basically i want to be shown an error if the Office setup is not finished...
#Thomas
Function Install-Office365Product{
Param (
[string]$path,
[string]$xmlPath
)
$arguments = "/configure `"$xmlPath`""
try{
Start-Process -FilePath "$path" -ArgumentList "$arguments" -Wait -NoNewWindow -ErrorAction Stop
}catch{
Write-Host "It was not possible to install the product!"
}
}
Your try/catch-block inside Install-Office365OfficeProducts is useless, because Install-Office365Product will not throw anything, except you pass wrong arguments. The try/catch-block inside Install-Office365Product will most likely also not catch anything. But you can of course evaluate the return code of your installer called with Start-Process:
function Install-Office365Product {
Param (
[string]$path,
[string]$xmlPath
)
$arguments = "/configure `"$xmlPath`""
$process = Start-Process -FilePath "$path" -ArgumentList "$arguments" -Wait -PassThru -NoNewWindow
if ($process.ExitCode -eq 0) {
Write-Host "Installation successful"
} else {
Write-Host "Installation failed"
}
}
Instead of writing to stdout, you can of course also throw an exception and handle it later in a higher function.
I currently have a simple script (A) which uses Invoke-Expression to call script B.
#Call Script
$command = '\\BoxA\PowerShellScripts$\PS_CopyUIAutomationOutput.ps1'
Try
{Invoke-Expression $command }
Catch
{
Write-host "Error: "$_
}
But when it does this it keep script A running. What I want to do is script A calls script B and then script A is closed, while script B is still running logging is done to an shared path for script B, so I don't need to capture any error or logging in script A.
Just use the exit keyword:
Try
{Invoke-Expression $command }
Catch
{
Write-host "Error: "$_
}
exit
EDIT:
If you want it to exit directly after running the command just place it after the invoke expression like so:
Try
{Invoke-Expression $command
exit}
Catch
{Write-host "Error: "$_
}
Use Stop-Process and an automatic variable $PID to release the session of the Script A and close the PS window.
$command = '\\BoxA\PowerShellScripts$\PS_CopyUIAutomationOutput.ps1'
Try
{
Invoke-Expression $command
}
Catch
{
Write-host "Error: "$_
}
Stop-Process -Id $PID
Just use Start-Process
Start-Process -FilePath PowerShell.exe -Argumentlist $Command
exit
this will start $command in a different process and continues to next line
regards,
Kvprasoon
I am attempting to create a simple console timer display.
...
$rpt = $null
write-status "Opening report", $rpt
# long-running
$rpt = rpt-open -path "C:\Documents and Settings\foobar\Desktop\Calendar.rpt"
...
function write-status ($msg, $obj) {
write-host "$msg" -nonewline
do {
sleep -seconds 1
write-host "." -nonewline
[System.Windows.Forms.Application]::DoEvents()
} while ($obj -eq $null)
write-host
}
The example generates 'Opening report ....', but the loop never exits.
I should probably use a call-back or delegate, but I'm not sure of the pattern in this situation.
What am I missing?
You should be using Write-Progress to inform the user of the run status of your process and update it as events warrant.
If you want to do some "parallel" computing with powershell use jobs.
$job = Start-Job -ScriptBlock {Open-File $file} -ArgumentList $file
while($job.status -eq 'Running'){
Write-Host '.' -NoNewLine
}
Here is what I think about Write-Host.
The script runs in sequence. When you input a $null object, the while condition will always be true. The function will continue forever until something breaks it (which never happends in your script.
First then will it be done with the function and continue with your next lines:
# long-running
$rpt = rpt-open -path "C:\Documents and Settings\foobar\Desktop\Calendar.rpt"
Summary: Your while loop works like while($true) atm = bad design