Add tool to detect inactive GitHub codeowners

[stefano-garzarella]

Introduces a Python script that checks CODEOWNERS against GitHub activity (reviews, PR/issue comments) over a configurable time period.

The script was initially included in
rust-vmm/community#188

[stefano-garzarella]

v2:

• applied black suggestions

[stefano-garzarella]

This is the summary generated:

$ export GITHUB_TOKEN=
$ ./check_inactive_codeowners.py
Checking activity from 2024-11-10 to 2025-11-10 (365 days)
Fetching all repositories from rust-vmm...
33 repositories to check: .github, acpi_tables, community, crate-template, event-manager, io-rate-limiter, kvm, kvm-bindings, kvm_wrapper, linux-loader, mshv, rust-vmm-ci, rust-vmm-container, seccompiler, vfio, vfio-bindings, vfio-ioctls, vfio-user, vhost, vhost-device, vhost-user-backend, virtio-bindings, vm-allocator, vm-device, vm-fdt, vm-memory, vm-pci, vm-superio, vm-virtio, vmm-reference, vmm-sys-util, vmm-vcpu, xen

...

================================================================================
SUMMARY - Activity from 2024-11-10 to 2025-11-10 (365 days)
================================================================================

Total repositories: 33

Repositories with all codeowners active (3):
  - mshv
  - vhost-device
  - vm-fdt

Repositories skipped (13):
  - .github
  - community
  - crate-template
  - io-rate-limiter
  - kvm-bindings
  - kvm_wrapper
  - vfio-bindings
  - vfio-ioctls
  - vfio-user
  - vhost-user-backend
  - virtio-bindings
  - vm-pci
  - vmm-vcpu

Repositories with inactive or non-existent codeowners (17):
  - acpi_tables:
      Active: @rbradford, @sboeuf
      Inactive: @jiangliu, @liuw
  - event-manager:
      Active: @ShadowCurse, @roypat
      Inactive: @alexandruag, @andreeaflorescu
  - kvm:
      Active: @ShadowCurse, @andreeaflorescu, @lauralt, @roypat
      Inactive: @acatangiu, @sameo
      Non-existent: @aghecenco
  - linux-loader:
      Active: @ShadowCurse, @rbradford, @roypat
      Inactive: @andreitraistaru, @sameo
      Non-existent: @aghecenco
  - rust-vmm-ci:
      Active: @ShadowCurse, @roypat
      Inactive: @andreeaflorescu, @gsserge, @lauralt, @sameo
  - rust-vmm-container:
      Active: @RuoqingHe, @ShadowCurse, @roypat, @stefano-garzarella, @stsquad
      Inactive: @andreeaflorescu, @gsserge, @lauralt
  - seccompiler:
      Active: @alindima
      Inactive: @petreeftime
  - vfio:
      Active: @jinankjain, @likebreath, @liuw, @rbradford, @russell-islam
      Inactive: @jiangliu, @sameo, @sboeuf
  - vhost:
      Active: @Ablu, @epilys, @germag, @slp, @stefano-garzarella
      Inactive: @eryugey, @jiangliu, @sboeuf
  - vm-allocator:
      Active: @AlexandruCihodaru, @ShadowCurse, @roypat
      Inactive: @alsrdn, @andreeaflorescu, @gsserge, @jiangliu, @studychao
  - vm-device:
      Inactive: @alexandruag, @gsserge, @jiangliu
  - vm-memory:
      Active: @ShadowCurse, @XanClic, @bonzini, @roypat
      Inactive: @alexandruag, @jiangliu, @tkreuzer
  - vm-superio:
      Active: @ShadowCurse, @roypat
      Inactive: @andreeaflorescu, @gsserge, @lauralt
  - vm-virtio:
      Active: @andreeaflorescu, @epilys, @stefano-garzarella, @stsquad
      Inactive: @alexandruag, @jiangliu, @slp
  - vmm-reference:
      Inactive: @alexandruag, @andreeaflorescu, @gsserge, @lauralt
  - vmm-sys-util:
      Active: @ShadowCurse, @roypat
      Inactive: @andreeaflorescu, @jiangliu, @liujing2, @sameo
  - xen:
      Active: @epilys, @stsquad
      Inactive: @mathieupoirier