Notify modules diff from compile.erlang

[jonatanklosko]

Follow up to #13896.

One thing to note is that :compile.file removes the file and if the compilation fails, there is no .beam file. This means that a module may be notified as changed, but it has no file on the disk. Not sure if we should convert such entries as deleted, or ignore them, or perhaps keep as changed.

[josevalim]

One thing to note is that :compile.file removes the file and if the compilation fails, there is no .beam file. This means that a module may be notified as changed, but it has no file on the disk. Not sure if we should convert such entries as deleted, or ignore them, or perhaps keep as changed.

I think this is fine. If we report a module as changed, a future compilation may still go and delete it, so we always need to deal with the fact they may not be there.

[jonatanklosko]

Updated!

[josevalim]

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