opt-inline-from:help.log

➜  ~ scalac -opt-inline-from:help
Patterns for classfile names from which the inliner is allowed to pull in code.
  *              Matches classes in the empty package
  **             All classes
  a.C            Class a.C
  a.*            Classes in package a
  a.**           Classes in a and in sub-packages of a
  **.Util        Classes named Util in any package (including the empty package)
  a.**.*Util*    Classes in a and sub-packages with Util in their name (including a.Util)
  a.C$D          The nested class D defined in class a.C
  scala.Predef$  The scala.Predef object
  <sources>      Classes defined in source files compiled in the current compilation, either
                 passed explicitly to the compiler or picked up from the `-sourcepath`

The setting accepts a list of patterns: `-opt-inline-from:p1:p2`. The setting can be passed
multiple times, the list of patterns gets extended. A leading `!` marks a pattern excluding.
The last matching pattern defines whether a classfile is included or excluded (default: excluded).
For example, `a.**:!a.b.**` includes classes in a and sub-packages, but not in a.b and sub-packages.

Note: on the command-line you might need to quote patterns containing `*` to prevent the shell
from expanding it to a list of files in the current directory.