[Issue 22268] New: rdmd does not track dependencies properly for --extra-file

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22268

          Issue ID: 22268
           Summary: rdmd does not track dependencies properly for
                    --extra-file
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: deadalnix at gmail.com

$ rdmd -m64 -Isrc -w -debug -g -unittest -i --extra-file=src/module1.d
--extra-file=src/module2.d --eval="/* Do nothing */"

This run, while properly running the unittests in the proper modules, will
generate a faulty dependency file that only contain standard library and
druntime stuff.

The same happens when using a module instead an --eval, in which case, only the
dependency of that module are tracked properly, and the dependencies of the
modules added via --extra-file remain untracked.

This is a major issue as it leads rdmd to reuse cache entries when it shouldn't
and run outdated code.

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