Powershell Copy-Item Exit code 1

I have a script with several files I'd like to copy and I do it more or less like so.

Copy-Item xxx1 yyy1 -Force
Copy-Item xxx2 yyy2 -Force
Copy-Item xxx3 yyy3 -Force
Copy-Item xxx4 yyy4 -Force

and so on.

Now I'd like this script to exit with 1 if any of the files was not copied.

Thanks in advance

What you're asking for is similar to the set -e option in bash, which causes a script to exit instantly in the event that a command signals failure (except in conditionals)^[1].

PowerShell has no such option^[2], but you can emulate it:

# Set up a trap (handler for when terminating errors occur).
Trap { 
    # Print the error. 
    # IMPORTANT: -ErrorAction Continue must be used, because Write-Error
    #            itself would otherwise cause a terminating error too.
    Write-Error $_ -ErrorAction Continue
    exit 1 
}

# Make non-terminating errors terminating.
$ErrorActionPreference = 'Stop'

# Based on $ErrorActionPreference = 'Stop', any error reported by
# Copy-Item will now cause a terminating error that triggers the Trap
# handler.
Copy-Item xxx1 yyy1 -Force
Copy-Item xxx2 yyy2 -Force
Copy-Item xxx3 yyy3 -Force
Copy-Item xxx4 yyy4 -Force

# Failure of an EXTERNAL PROGRAM must be handled EXPLICITLY,
# because `$ErrorActionPreference = 'Stop'` does NOT apply.
foo.exe -bar
if ($LASTEXITCODE -ne 0) { Throw "foo failed." } # Trigger the trap.

# Signal success.
exit 0

Note:

PowerShell-internally, exit codes are not used in error handling; they typically only come into play when invoking external programs from PowerShell, or when PowerShell / a PowerShell script needs to signal success vs. failure for the outside world (when called from another shell, such as cmd on Windows, or bash on Unix-like platforms).
PowerShell's automatic $LASTEXITCODE variable reflects the exit code of the most recently executed external program / PowerShell script that called exit <n>.
Calls to external (console/terminal) programs that signal failure via a nonzero exit code do not trigger the trap block, hence the explicit throw statement in the snippet above.
Unless you set the exit code explicitly, it is the exit code of whatever external program happened to execute last that determines the script's overall exit code.

^{[1] Note that this option has its critics, because the exact rules around when a failure is tolerated and when it causes a script to abort are hard to remember - see http://mywiki.wooledge.org/BashFAQ/105}

^{[2] Potentially adding support for it is being discussed in this RFC proposal.}

You can do something like this, and it will exit with the number of powershell command errors.

$errorcount = $error.count

Copy-Item xxx1 yyy1 -Force
Copy-Item xxx2 yyy2 -Force
Copy-Item xxx3 yyy3 -Force
Copy-Item xxx4 yyy4 -Force

exit $error.count - $errorcount

来源：https://stackoverflow.com/questions/53248823/powershell-copy-item-exit-code-1

标签

powershell

error-handling

exit-code

copy-item