How to handle tf.exe errors in PowerShell script

Question

I have a PowerShell script that run tf.exe commands.

$tfExe = {C:\path\to\tf.exe}
& $tfExe checkout / checkin etc.

If I try to run checkin command to file that not changed I got an error:

The following changes were not checked in because the item were not modified.

Undoing edit: {C:\path\to\file}

The problem is, I run the script within a TFS build, and the build fail with an error:

[error] There are no remaining changes to check in.

But this is not a real error, if there is no changes so don't do check in, this is good behavior for me.

How can I handle the tf.exe errors?

I tried with try catch but is not worked, altough there is an error the try block is excuted and not the catch.

I tried also with a variable get the output $test = & $tfExe checkin ... and still get an error (and the variable is empty).

`$LASTEXITCODE` contains the exit code of the last executable you ran. — Bill_Stewart, Dec 23 '18 at 15:19
But it doesn't help me becuase I can investigate the `$LASTEXITCODE` only after I already got the error and then the build already failed. — Shayki Abramczyk, Dec 23 '18 at 15:34

score 2 · Accepted Answer · answered Dec 23 '18 at 15:40

2

PowerShell doesn't understand error from native executables. You have to parse through the output to take decision. You can redirect the error stream to output stream.

$Output = tf.exe … 2>&1

$Output.exception.message -match 'There are no remaining'

answered Dec 23 '18 at 15:40

Prasoon Karunan V

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I think it's help me! Thank you! – Shayki Abramczyk Dec 23 '18 at 15:56

How to handle tf.exe errors in PowerShell script

1 Answers1