Review for Package: src:libdecor-0

[Summary]
This is a rather small and simple library to draw client side decorations on
wayland. Albeit being a pretty new project with only a single, initial release
so far, the codebase seems to be in good shape and properly maintained.

MIR team ACK
This does not need a security review

List of specific binary packages to be promoted to main:
 libdecor-0-0, libdecor-0-plugin-1-cairo, libdecor-0-dev
 
Specific binary packages built, but NOT to be promoted to main:
 libdecor-tests (not really needed in main)

Notes:
This package is in pretty good shape overall. As it is a pretty new library, we
should monitor the development initally, to make sure it is not being neglected.
It does not touch security critical things, and I guess we can skip security
review on this one.

Required TODOs:
- None

Recommended TODOs:
- The package should get a team bug subscriber before being promoted (~desktop?)
- Improve debian/watch
- Work towards improved test coverage in the future
- Closely monitor the release cadence of Upstream/Debian/Ubuntu and make sure
  this package doesn't get neglected

[Duplication]
There is no other package in main providing the same functionality.

[Dependencies]
OK:
- no other Dependencies to MIR due to this
  - checked with check-mir
  - not listed in seeded-in-ubuntu
  - none of the (potentially auto-generated) dependencies (Depends
    and Recommends) that are present after build are not in main
 - no -dev/-debug/-doc packages that need exclusion
 - No dependencies in main that are only superficially tested requiring
   more tests now.

Problems: None

[Embedded sources and static linking]
OK:
- no embedded source present
- no static linking
- does not have odd Built-Using entries
- not a go package, no extra constraints to consider in that regard

Problems: None

[Security]
OK:
- history of CVEs does not look concerning
- does not run a daemon as root
- does not use webkit1,2
- does not use lib*v8 directly
- does not parse data formats
- does not open a port/socket
- does not process arbitrary web content
- does not use centralized online accounts
- does not integrate arbitrary javascript into the desktop
- does not deal with system authentication (eg, pam), etc)
- does not deal with security attestation (secure boot, tpm, signatures)

Problems: None

[Common blockers]
OK:
- does not FTBFS currently
- does have a test suite that runs as autopkgtest
- if a non-trivial test on this level does not make sense (the lib alone
  is only doing rather simple things), is the overall solution (app+libs)
  extensively covered i.e. via end to end autopkgtest ? => it is covered in many
  libsdl2 & libsdl2 user's autopkgtests
- no new python2 dependency

Problems:
- does NOT have a test suite that runs & fails the build
- autopkgtest is superficial

[Packaging red flags]
OK:
- Ubuntu does not carry a delta
- symbols tracking is in place
- d/watch is present and looks ok (if needed, e.g. non-native)
- the current release is packaged
- promoting this does not seem to cause issues for MOTUs that so far
  maintained the package
- no massive Lintian warnings
- d/rules is rather clean
- It is not on the lto-disabled list

Problems:
- Upstream update history is sporadic
- Debian/Ubuntu update history is sporadic
=> This is a very new package (initial release) and it does not have any update
   history. But there's nothing we can do about that.

[Upstream red flags]
OK:
- no Errors/warnings during the build
- no incautious use of malloc/sprintf (as far as we can check it)
- no use of sudo, gksu, pkexec, or LD_LIBRARY_PATH (usage is OK inside tests)
- no use of user nobody
- no use of setuid
- no important open bugs (crashers, etc) in Debian or Ubuntu
- no dependency on webkit, qtwebkit, seed or libgoa-*
- part of the UI, BUT desktop file not needed, as it is a library
- no translation present, but none needed for this case (only non-text)?

Problems: None