Set $_SERVER['SCRIPT_NAME'] within proxy command

[fredden]

Fixes: #11555
Fixes: sebastianbergmann/phpunit#5447

This produces something like the following. This specific example has been taken from the test suite.

if (__FILE__ === realpath($_SERVER['SCRIPT_NAME'])) {
    $_SERVER['SCRIPT_NAME'] = realpath(__DIR__ . '/..'.'/vendor/foo/bar/binary');
}

[Seldaek]

We should do a realpath on $binPathExported I think otherwise you end up with a relative path which would not be the full path, but maybe that's fine too I guess SCRIPT_NAME isn't guaranteed to be canonical?

[fredden]

I wondered about this while writing the code for this. From what I can tell, SCRIPT_NAME holds the same path that was used on the command line.

The documentation for $_SERVER says that SCRIPT_NAME contains a "path" whereas __FILE__ contains a "full path". I don't know if difference in terms there is intentional or significant.

Contains the current script's path. This is useful for pages which need to point to themselves. The __FILE__ constant contains the full path and filename of the current (i.e. included) file.

I've updated the pull request to use realpath() as requested.

[Seldaek]

Thanks

[Wulfheart]

@Seldaek out of curiosity: I guess there are plans to make a new release where this change is also included. Any ETA for that release? Thank you in advance.

[Seldaek]

@Wulfheart yes, I'll try asap, life is a bit hectic at the moment tho, but definitely my next target is a 2.6.0 release :)

[Wulfheart]

@Seldaek thanks for your response. Glad that it is on the table and not in the far future.
Take care of yourself!

[Seldaek]

I had to revert this due to #11617 - it was a hacky attempt at fixing it and well it backfired as these things often do.

So I think the best is to just call the phar directly as per sebastianbergmann/phpunit#5447 (comment) - or someone sends a PR detecting the Composer bin proxy and also allowing that for execution of the phar. This is detectable by checking for presence of the global _composer_bin_dir variable.