How can I get Assetic to compile SCSS on Zend Fram

My site is on Zend Framework and uses Assetic to compile SCSS and minify it.

It works wonderfully when I'm developing on Ubuntu.

Sometimes I need to develop on Windows (WAMP) instead of Ubuntu.

I haven't been able to get Assetic to work on Windows.

I've found many Q&As about it but no answers seem to apply to me. E.g. I don't think I have a config.yml file anywhere.

How to have Assetic + sass work with Symfony2 in Windows?

How to use SCSS filter in Symfony2 under Windows?

Here is an error: Assetic\Exception\FilterException: An error occurred while running: "C:\Ruby193\bin\sass.bat" "--load-path" "C:\code\branches\signup-and-login\scss" "--scss" "--cache-location" "C:\Windows\Temp" "C:\Windows\Temp\assCCF2.tmp" Error Output: The filename, directory name, or volume label syntax is incorrect.

Thoughts?

I think I got it working, but I'm not 100% sure I could reproduce the steps to fix it.

So please add a new answer if you figure out better details.

I have Ruby installed at C:\Ruby193\. I needed to edit the sass.bat file in its 'bin' folder to be:

@ECHO OFF
IF NOT "%~f0" == "~f0" GOTO :WinNT
@"ruby.exe" "C:/Ruby193/bin/sass" %1 %2 %3 %4 %5 %6 %7 %8 %9
GOTO :EOF
:WinNT
@"C:/Ruby193/bin/ruby.exe" "%~dpn0" %*

I read https://github.com/symfony/AsseticBundle/issues/81.

I replaced the file at C:\wamp\bin\php\php5.3.10\PEAR\pear\Symfony\Component\Process\Process.php with https://raw.github.com/symfony/Process/master/Process.php.

I don't know whether this matters, but Assetic was using forward slashes instead of the PHP constant called DIRECTORY_SEPARATOR, so:

In Assetic\Filter\Sass\SassFilter.php, I added $root = str_replace('/', DIRECTORY_SEPARATOR, $root);//fix for Windows after $root = $asset->getSourceRoot();

And slightly below that, I changed a line to $pb->add('--load-path')->add(dirname($root.DIRECTORY_SEPARATOR.$path));.