reizql: META(filename=...) matcher

[isidentical]

Currently, there is no way to search in a specific project while using Reiz. Considering the intended dataset size (thousands of packages) it might be a cool idea to somehow add META() matcher for searching custom filenames. Here is an example;

Call(
    Name('something'),
    __metadata__ = META(
        filename=f'requests/%'
    )
)

this would match files only under requests/ prefix, which internally means only the requests/ repo.

[isidentical]

Here is an example about how to search a specific filename;

reiz.io/test_cases/runner.py

Lines 188 to 195 in 8064f82

	query.filters = IR.combine_filters(
	query.filters,
	IR.filter(
	IR.attribute(IR.attribute(None, "_module"), "filename"),
	IR.literal(self.expected_filename),
	"=",
	),
	)

[isidentical]

And this is the place where you could add new metadata matchers;

reiz.io/reiz/reizql/compiler/functions.py

Lines 114 to 123 in 8064f82

	@Signature.register("META", ["parent"], {"parent": None})
	def convert_meta(node, state, arguments):
	state.ensure(node, state.pointer == "__metadata__")
	filters = None
	if arguments.parent:
	filters = IR.combine_filters(
	filters, metadata_parent(arguments.parent, state)
	)
	return filters