linux-kernel - get_maintainers.pl subsystem output

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Date:   Fri, 19 Jul 2019 07:35:00 +0000
From:   "Duda, Sebastian" <sebastian.duda@....de>
To:     joe@...ches.com
Cc:     linux-kernel@...r.kernel.org, lukas.bulwahn@...il.com,
        ralf.ramsauer@...-regensburg.de, wolfgang.mauerer@...-regensburg.de
Subject: get_maintainers.pl subsystem output

Hi Joe,

I'm conducting a large-scale patch analysis of the LKML with 1.8 million 
patch emails. I'm using the `get_maintainer.pl` script to know which 
patch is related to which subsystem.

I ran into two issues while using the script:

1. When I use the script the trivial way

     $ scripts/get_maintainer.pl --subsystem --status --separator , 
drivers/media/i2c/adv748x/
     Kieran Bingham <kieran.bingham@...asonboard.com> (maintainer:ANALOG 
DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@...nel.org> 
(maintainer:MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB)),linux-media@...r.kernel.org (open list:ANALOG DEVICES INC 
ADV748X DRIVER),linux-kernel@...r.kernel.org (open list)
     Maintained,Buried alive in reporters
     ANALOG DEVICES INC ADV748X DRIVER,MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB),THE REST

the output is hard to parse because the status `Maintained` is displayed 
only once but related to two subsystems.

I'd prefer a more table like representation, like this:

     Kieran Bingham <kieran.bingham@...asonboard.com> (maintainer:ANALOG 
DEVICES INC ADV748X DRIVER),linux-media@...r.kernel.org (open 
list:ANALOG DEVICES INC ADV748X DRIVER),ANALOG DEVICES INC ADV748X 
DRIVER,Maintained
     Mauro Carvalho Chehab <mchehab@...nel.org> (maintainer:MEDIA INPUT 
INFRASTRUCTURE (V4L/DVB)),MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB),Maintained
     linux-kernel@...r.kernel.org (open list),THE REST,Buried alive in 
reporters


2. I want to analyze multiple patches, currently I am calling the script 
once per patch. When calling the script with multiple files the files 
output is merged

     $ scripts/get_maintainer.pl --subsystem --status --separator ',' 
drivers/media/i2c/adv748x/ include/uapi/linux/wmi.h
     Kieran Bingham <kieran.bingham@...asonboard.com> (maintainer:ANALOG 
DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@...nel.org> 
(maintainer:MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB)),linux-media@...r.kernel.org (open list:ANALOG DEVICES INC 
ADV748X DRIVER),linux-kernel@...r.kernel.org (open 
list),platform-driver-x86@...r.kernel.org (open list:ACPI WMI DRIVER)
     Maintained,Buried alive in reporters,Orphan
     ANALOG DEVICES INC ADV748X DRIVER,MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB),THE REST,ACPI WMI DRIVER

I'd like to run the script with all files but separated output, like 
this:

     $ scripts/get_maintainer.pl --subsystem --status --separator ',' 
--separate-files drivers/media/i2c/adv748x/ include/uapi/linux/wmi.h
     Kieran Bingham <kieran.bingham@...asonboard.com> (maintainer:ANALOG 
DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@...nel.org> 
(maintainer:MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB)),linux-media@...r.kernel.org (open list:ANALOG DEVICES INC 
ADV748X DRIVER),linux-kernel@...r.kernel.org (open list)
     Maintained,Buried alive in reporters
     ANALOG DEVICES INC ADV748X DRIVER,MEDIA INPUT INFRASTRUCTURE 
(V4L/DVB),THE REST

     platform-driver-x86@...r.kernel.org (open list:ACPI WMI 
DRIVER),linux-kernel@...r.kernel.org (open list)
     Orphan,Buried alive in reporters
     ACPI WMI DRIVER,THE REST


My Questions are:
1. How can I make get_maintainer's output to be more table-like?
2. How can I make get_maintainer.pl to separate each file's output?

Kind Regards
Sebastian