Scan files included by autoloaders

[weirdan]

Refs #2861

To provide a bit more context: this PR changes the way Psalm discovers what's been made available during autoloader registration. Previously it would simply deep-scan files listed in autoloader.file section of composer.json. Now it takes a snapshot of loaded files before autoloader registration and compares that to the included file list after autoloader is registered. This provides almost bullet-proof support for any custom logic autoloader may implement.

[weirdan]

I think better approach could be to compare the list of included files before and after autoloader registration, remove any that are related to Psalm itself and scan the remaining.

[azjezz]

any updates here?

[weirdan]

CircleCI reports one issue remaining with ProxyManager, but I can't seem to reproduce it outside the CI, even using CircleCI-built psalm.phar.

[muglug]

Thanks, I'll debug that error myself

[azjezz]

🎉 Thank you for you work!

[muglug]

@weirdan the error was caused by the phar, which is built with ocramius/packageversions:1.4.2, which is missing a @psalm-pure annotation. I think Psalm is reflecting that class's method docblock from the bundled phar after reflecting the one in the vendor directory.

[weirdan]

I wonder why it wouldn't fail the same way when I tried running the phar I downloaded from CircleCI. Anyway, we'll see how it goes when new release is cut.