Vista - Output to STDERR

I'm looking for a way to write to STDERR. The only method I've found so far
is write-error, but PowerShell likes to add "useful" information like script
name, arguments, etc. How can this be done?

To elaborate, I'm building a hook for subversion which will deny anyone from
committing too much data at one time. In order to return an error message to
the user, the error needs to be written to STDERR. AFAIK the only way to do
this is with write-error.

So currently, the user gets an error back like this (hyphens mine):
----------------------------------------------------------------------
C:\svn\repos\myrepo\hooks\pre-commit.ps1 :
Your commit exceeds the maximum size allowed by this server.
At line: 1 char: 39
+ c:\svn\repos\myrepo\hooks\pre-commit.ps1 <<<< c:\svn\repos\myrepo 3-1
----------------------------------------------------------------------

Instead of simply:
----------------------------------------------------------------------
Your commit exceeds the maximum size allowed by this server.
----------------------------------------------------------------------

I've tried using write-warning, but this doesn't go to STDERR.

Mike

Hi Mike,

I'm not sure if this is what you need, try:

#$error.clear()
[void]$error.add("Your commit exceeds the maximum size allowed by this server.")
write-host "------------------------" -foregroundColor red -backgroundColor
black
write-host -object $error[0] -fore red -back black
write-host "------------------------" -f red -b black



-----
Shay Levi
$cript Fanatic
http://scriptolog.blogspot.com
Hebrew weblog: http://blogs.microsoft.co.il/blogs/scriptfanatic

# Throw an exception and trap it;
# in the Trap output just the message and exit the script.
# Write-Host and the color variables are optional.

trap {
$errFrgrnd = $host.privatedata.ErrorForegroundColor
$errBckgrnd = $host.privatedata.ErrorBackgroundColor
write-host $_.exception.message -f $errFrgrnd -b $errBckgrnd
exit
}
throw "Your commit exceeds the maximum size allowed by this server."

--
Kiron

Shay, Kiron,

Thanks for giving this a try, but the suggestions you made only simulate the
look of STDERR output in powershell, but is still printed to STDOUT.

If this was a bash script, I would say:
echo "This is written to STDERR" 1>&2

I had noticed this syntax in some of the PowerShell docs. Interestingly
PowerShell will redirect STDERR to STDOUT using this syntax, but throws an
error when trying to use this method to redirect STDOUT to STDERR.

PS>write-error "I'm redirecting STDERR to STDOUT" 2>&1
write-error "I'm redirecting STDERR to STDOUT" 2>&1 : I'm redirecting STDERR
to STDOUT

Or from a script:
PS>& c:\test2.ps1
C:\test2.ps1 : I'm redirecting STDERR to STDOUT
At line:1 char:2
+ & <<<< c:\test2.ps1

But when redirecting STDOUT to STDERR:
PS>write-output "I'm trying to write to STDERR" 1>&2
The redirection operator '1>&2' is not supported yet.
At line:1 char:49
+ write-output "I'm trying to write to STDERR" 1>&2 <<<<

I'd welcome any other ideas. For now I'll use write-stderr. It certainly
isn't unusable for my case, just noisier than necessary.

Mike


"Mike Miller" <mike@xxxxxx> wrote in message
news:OFTqo2pPIHA.484@xxxxxx

[Console]::Error.WriteLine("Error Text!")

"Mike Miller" <mike@xxxxxx> wrote in message
news:OG5p4NMQIHA.4752@xxxxxx

Steven, this is PERFECT! Thank you very much.

Mike


"Steven Hystad" <steven.hystad@xxxxxx> wrote in message
news:eeD3$kTQIHA.4740@xxxxxx

Thats actually beautiful way to bypass powershell for this need. Elegant.

PowerShell has its own version of [Console]::Error.WriteLine(), but I noticed neither behave the same in PowerShell.

Try this:
-< t1.ps1 >-
'hi'
[datetime]'text'
$host.ui.WriteErrorLine('ErrorLine1...')
[Console]::Error.WriteLine('ErrorLine2...')
'bye'
-< t1.ps1 >-

# all stdErr is redirected fine from Cmd.exe
cmd
powershell c:\t1 2> c:\err.txt
type c:\err.txt
exit

# not all stdErr redirected in PowerShell
.\t1 2> c:\err.txt
gc c:\err.txt

--
Kiron