Script mode using frontmatter #48
Description
Simply using r-a's republish of rustc_lexer ... or by using a custom lexer.
Unclear: Configuration language/format we want to use inside of it.
Purpose: Specifying file dependencies similar to compiletest auxiliaries.
Con: We already have a compiletest directive parser & support for adding custom directives, this is simply unnecessary. In the future we'll also have //@ crate ... {, so it's doubly unnecessary.
However, it's still "cool" and might have some other unforeseen merit.