How do I pass an equal sign when calling a batch script in Powershell?
We have a batch file that invokes our MSBuild-based build process. Syntax:
build App Target [ Additional MSBuild Arguments ]
Internally, it does this:
msbuild.exe %1.msbuild /t:%2 %3 %4 %5 %6 %7 %8 %9
Which results in calls to MSBuild that look like this:
msbuild.exe App.msbuild /t:Target
When any argument contains the equal sign, =
, Powershell completely removes it. My batch script never sees it. This does not happen with the standard cmd.exe
command prompt.
For example, if I call
build App Target "/p:Property=Value"
this is what gets passed to MSBuild:
msbuild.exe App.msmbuild /t:Target /p:Property Value
I expected this:
msbuild.exe App.msbuild /t:Target "/p:Property=Value"
I've tried the Powershell escape character, the standard Command Prompt escape character, and even stuff I made up:
开发者_如何学运维build App Target "/p:Property=Value"
build App Target '/p:Property=Value'
build App Target /p:Property^=Value
build App Target /p:Property`=Value
build App Target /p:Property==Value
None of it works. What do I do to get the equal sign to not be stripped out or removed?
I've seen this before and have found a way to trick it out. I wish I could explain what's going on in particular with the '=' but I cannot. In your situation I'm fairly certain the following will work if you want to pass properties to msbuild:
build App Target '"/p:Property=Value"'
When echoed, this produces the following:
msbuild.exe App.msbuild /t:Target "/p:Property=Value"
With PowerShell 3 you can use --% to stop the normal parsing powershell does.
build --% App Target "/p:Property=Value"
I don't know if there's an easier answer (I think not) but you can solve the problem by using .Net's process class to invoke cmd.exe. Here's an example:
# use .NET Process class to run a batch file, passing it an argument that contains an equals sign.
# This test script assumes the existence of a batch file "c:\temp\test.bat"
# that has this content:
# echo %1
# pause
$cmdLine = $cmdLine = '/c c:\temp\test.bat "x=1"'
$procStartInfo = new-object System.Diagnostics.ProcessStartInfo("cmd", $cmdLine )
$proc = new-object System.Diagnostics.Process
$proc.StartInfo = $procStartInfo
$proc.Start();
Have you tried single quotes to force a literal interpretation?
Or: cmd /c 'msbuild.exe App.msbuild /t:Target "/p:Property=Value"'
It seems that only single-quote around double-quote might be the best for multiple scenario around windows environment. Following link from MS shows its support(or limitation) of equal sign http://support.microsoft.com/kb/35938 It is specific to Batch Files but it likely affect lots of other MS shell products.
The answer is that %2
becomes "/p:property"
and %3
becomes "value"
.
Make this work in your batch file by using BOTH %2
and %3
and insert an =
sign between them:
msbuild.exe %1.msbuild /t:%2=%3 %4 %5 %6 %7 %8 %9
and do not use the quote chars on the command line call. Use:
build App Target /p:property=value
For additional args with =
signs just keep pairing them up.
I had the same issue with a simple batch file to run youtube-dl where the URL I pass has an =
sign in it.
solved as :
@echo off
REM YTDL audio only
echo %1=%2
youtube-dl -f bestaudio --extract-audio --audio-format mp3 --audio-quality 0 %1=%2
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