make it possible to build phar

[taoso]

try to fix #46 #18

• use system temp path
• use %tmpDir instead of $rootDir/tmp
• support additional autoload file by --autoload-file option

[ondrejmirtes]

Hi, thanks for the effort. The main hurdle for global installation via Composer or usage through phar package is the dependency between libraries used by PHPStan and by the main app. PHP cannot load two versions of a same-named class, so if both PHPStan and the analyzed app use for example Symfony Console, they must use the same version, otherwise PHPStan could report errors even if the app does not really contain any.

The solution to this problem is to prefix all dependencies in the generated phar package. PHPUnit needs to solve the same problem and thanks to them, I stumbled upon a library that aims to solve that: https://github.com/webmozart/php-scoper

So that's the first and main issue that needs to be solved.

As for the tmpDir, I would rather have it be configurable than magically discovering system temp path. So there's need to be a tmpDir in config.neon overridable by project config file.

As for the autoload file, thumbs up! I imagine it's enough to point i to the vendor/autoload.php.

[taoso]

@ondrejmirtes good luck.

[ondrejmirtes]

It's a shame to abandon work in progress :) @lvht

OK, I will have to do it myself.

[taoso]

@ondrejmirtes I decide to make my own fork. Thanks for you awesome work.

[ondrejmirtes]

@lvht It would be better to join forces. I have great ideas in the pipeline and it would be better to have joined focus.