Standalone drush scripts on Windows

The shebang scripts will probably work on Windows under mingw / cygwin, but you are right, the test should be skipped on other platforms.

Here is a test for bash prior to testing the shebang script. We just naively assume that bash is present on Linux (Mac) and Cygwin (MINGW), and not on Windows, rather than do 'which bash' or equiv. on every bootstrap. The test is superfluous, in a way, because without bash, we will never be called in a way that activates this code; however, it does serve as documentation of sorts what the intention is. I don't know, maybe that makes the test potentially harmful? (If we're wrong in drush_has_bash, we turn off behavior for no good reason.)

Note that with or without this patch, you can run shebang scripts via drush php-script c:/path/to/script on both Linux and Windows.

Oops. Here it is.

Add windows tag

Updated the patch to current HEAD.

@moshe: Not 100% sure how the test case should be altered here. Let's discuss it on our Skype meeting later today.

So, about the line elseif (((strpos($args[1], ' ') !== FALSE) || (!ctype_alnum($args[1][0]))) && (_drush_is_drush_shebang_script($args[2])))...

This allows folks to pass arguments or options to drush on the shebang line, but it only works if you use the absolute path to drush; it cannot be made to work with #!/usr/bin/env drush. I don't think anyone is using this feature, and calling drush_set_option at the beginning of your script is a fine alternative, so I think this code block could be dropped with no ill effects.

I investigated #8 further and discovered that I was WRONG, that code is necessary for all shebang scripts.

Works on Linux; I'm fine with committing it.