rdmd does not track dependencies properly for --extra-file

[mdparker]

deadalnix reported this on 2021-09-02T22:08:52Z

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

CC List

• razvan.nitu1305

Description

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This is a major issue as it leads rdmd to reuse cache entries when it shouldn't and run outdated code.

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