get_maintainer: add --keywords-in-file option

There were some recent attempts [1] [2] to make the K: field less noisy
and its behavior more obvious.  Ultimately, a shift in the default
behavior and an associated command line flag is the best choice.

Currently, K: will match keywords found in both patches and files.

Matching content from entire files is (while documented) not obvious
behavior and is usually not wanted by maintainers.

Now only patch content will be matched against unless --keywords-in-file
is also provided as an argument to get_maintainer.

Add the actual keyword matched to the role or rolestats as well.

For instance given the diff below that removes clang:

:   diff --git a/drivers/hid/bpf/entrypoints/README b/drivers/hid/bpf/entrypoints/README
:    index 147e0d41509f..f88eb19e8ef2 100644
:    --- a/drivers/hid/bpf/entrypoints/README
:    +++ b/drivers/hid/bpf/entrypoints/README
:    @@ -1,4 +1,4 @@
:     WARNING:
:     If you change "entrypoints.bpf.c" do "make -j" in this directory to rebuild "entrypoints.skel.h".
:    -Make sure to have clang 10 installed.
:    +Make sure to have 10 installed.
:     See Documentation/bpf/bpf_devel_QA.rst

The new role/rolestats output includes ":Keyword:\b(?i:clang|llvm)\b"

$ git diff drivers/hid/bpf/entrypoints/README | .scripts/get_maintainer.pl
Jiri Kosina <[email protected]> (maintainer:HID CORE LAYER,commit_signer:1/1=100%)
Benjamin Tissoires <[email protected]> (maintainer:HID CORE LAYER,commit_signer:1/1=100%,authored:1/1=100%,added_lines:4/4=100%)
Nathan Chancellor <[email protected]> (supporter:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b)
Nick Desaulniers <[email protected]> (supporter:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b)
Tom Rix <[email protected]> (reviewer:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b)
Greg Kroah-Hartman <[email protected]> (commit_signer:1/1=100%)
[email protected] (open list:HID CORE LAYER)
[email protected] (open list)
[email protected] (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b)

Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/all/[email protected]
Link: https://lore.kernel.org/all/[email protected]
Original-patch-by: Justin Stitt <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Joe Perches <[email protected]>
Tested-by: Justin Stitt <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Nick Desaulniers <[email protected]>

Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions