Re: get_maintainers.pl subsystem output

[Duda, Sebastian]

Hi Joe,

when analyzing the patch 
`<20150128012747.824898918@xxxxxxxxxxxxxxxxxxx>` [1] with 
`get_maintainers.pl --subsystem --status --separator , /tmp/patch`, 
there is the following output:

    Chris Mason <clm@xxxxxx> (maintainer:BTRFS FILE SYSTEM),Josef Bacik 
<jbacik@xxxxxx> (maintainer:BTRFS FILE SYSTEM),David Sterba 
<dsterba@xxxxxxx> (maintainer:BTRFS FILE SYSTEM),Alexander Viro 
<viro@xxxxxxxxxxxxxxxxxx> (maintainer:FILESYSTEMS (VFS and 
infrastructure)),"Theodore Ts'o" <tytso@xxxxxxx> (maintainer:EXT4 FILE 
SYSTEM),Andreas Dilger <adilger.kernel@xxxxxxxxx> (maintainer:EXT4 FILE 
SYSTEM),Jaegeuk Kim <jaegeuk@xxxxxxxxxx> (maintainer:F2FS FILE 
SYSTEM),Changman Lee <cm224.lee@xxxxxxxxxxx> (maintainer:F2FS FILE 
SYSTEM),Miklos Szeredi <miklos@xxxxxxxxxx> (maintainer:FUSE: FILESYSTEM 
IN USERSPACE),Steven Whitehouse <swhiteho@xxxxxxxxxx> (supporter:GFS2 
FILE SYSTEM),Anton Altaparmakov <anton@xxxxxxxxxx> (supporter:NTFS 
FILESYSTEM),Hugh Dickins <hughd@xxxxxxxxxx> (maintainer:TMPFS (SHMEM 
FILESYSTEM)),linux-btrfs@xxxxxxxxxxxxxxx (open list:BTRFS FILE 
SYSTEM),linux-kernel@xxxxxxxxxxxxxxx (open 
list),linux-fsdevel@xxxxxxxxxxxxxxx (open list:FILESYSTEMS (VFS and 
infrastructure)),linux-ext4@xxxxxxxxxxxxxxx (open list:EXT4 FILE 
SYSTEM),linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx (open list:F2FS FILE 
SYSTEM),fuse-devel@xxxxxxxxxxxxxxxxxxxxx (open list:FUSE: FILESYSTEM IN 
USERSPACE),cluster-devel@xxxxxxxxxx (open list:GFS2 FILE 
SYSTEM),linux-ntfs-dev@xxxxxxxxxxxxxxxxxxxxx (open list:NTFS 
FILESYSTEM),linux-mm@xxxxxxxxx (open list:MEMORY MANAGEMENT)
    Maintained,Buried alive in reporters,Supported
    BTRFS FILE SYSTEM,THE REST,FILESYSTEMS (VFS and infrastructure),EXT4 
FILE SYSTEM,F2FS FILE SYSTEM,FUSE: FILESYSTEM IN USERSPACE,GFS2 FILE 
SYSTEM,NTFS FILESYSTEM,MEMORY MANAGEMENT,TMPFS (SHMEM FILESYSTEM)

How can I parse this output automatically? or how can I generate a 
parsable output?

I need the tuples of subsystems and status:
(THE REST, Buried alive in reporters)
(TMPFS, Maintained)
(BTRFS FILE SYSTEM, Maintained)
â
(GFS2 FILE SYSTEM, Supported)

I'm not aware how to reliably assign the statuses to the subsystems.

Thank you in advance
Kind regards

Sebastian Duda

[1] https://lore.kernel.org/patchwork/patch/537252/

On 2019-07-19 10:50, Joe Perches wrote:
> On Fri, 2019-07-19 at 07:35 +0000, Duda, Sebastian wrote:
> > 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.
>
> The MAINTAINERS file is updated frequently.
>
> Are you also using the MAINTAINERS file used
> at the time each patch was submitted?
>
> > 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@xxxxxxxxxxxxxxxx> 
> > (maintainer:ANALOG
> > DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> > (maintainer:MEDIA INPUT INFRASTRUCTURE
> > (V4L/DVB)),linux-media@xxxxxxxxxxxxxxx (open list:ANALOG DEVICES INC
> > ADV748X DRIVER),linux-kernel@xxxxxxxxxxxxxxx (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@xxxxxxxxxxxxxxxx> 
> > (maintainer:ANALOG
> > DEVICES INC ADV748X DRIVER),linux-media@xxxxxxxxxxxxxxx (open
> > list:ANALOG DEVICES INC ADV748X DRIVER),ANALOG DEVICES INC ADV748X
> > DRIVER,Maintained
> >      Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> (maintainer:MEDIA 
> > INPUT
> > INFRASTRUCTURE (V4L/DVB)),MEDIA INPUT INFRASTRUCTURE
> > (V4L/DVB),Maintained
> >      linux-kernel@xxxxxxxxxxxxxxx (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@xxxxxxxxxxxxxxxx> 
> > (maintainer:ANALOG
> > DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> > (maintainer:MEDIA INPUT INFRASTRUCTURE
> > (V4L/DVB)),linux-media@xxxxxxxxxxxxxxx (open list:ANALOG DEVICES INC
> > ADV748X DRIVER),linux-kernel@xxxxxxxxxxxxxxx (open
> > list),platform-driver-x86@xxxxxxxxxxxxxxx (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@xxxxxxxxxxxxxxxx> 
> > (maintainer:ANALOG
> > DEVICES INC ADV748X DRIVER),Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> > (maintainer:MEDIA INPUT INFRASTRUCTURE
> > (V4L/DVB)),linux-media@xxxxxxxxxxxxxxx (open list:ANALOG DEVICES INC
> > ADV748X DRIVER),linux-kernel@xxxxxxxxxxxxxxx (open list)
> >      Maintained,Buried alive in reporters
> >      ANALOG DEVICES INC ADV748X DRIVER,MEDIA INPUT INFRASTRUCTURE
> > (V4L/DVB),THE REST
> >
> >      platform-driver-x86@xxxxxxxxxxxxxxx (open list:ACPI WMI
> > DRIVER),linux-kernel@xxxxxxxxxxxxxxx (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?
>
> I suggest adding --nogit --nogit-fallback --roles --norolestats
>
> > 2. How can I make get_maintainer.pl to separate each file's output?
>
> Run the script with multiple invocations. once for each file
> modified by the patch.