[Bug 2169694] [NEW] python3-awscurl (main) depends on python3-awscrt (universe), blocking migration; awscrt is only needed for SigV4a

[Sebastien Bacher]

Public bug reported:

python-awscurl 0.44-0ubuntu1 cannot migrate:

  python3-awscurl/amd64 in main cannot depend on python3-awscrt in
universe

python3-awscurl is in main because python3-ceilometer depends on it. The
new python3-awscrt dependency comes only from "awscrt" in
install_requires in setup.py (via ${python3:Depends}). awscurl only uses
awscrt for SigV4a signing (botocore.crt.auth.CrtS3SigV4AsymAuth).
Regular SigV4 signing, the default, works without it. I checked: "from
botocore import crt" imports fine without awscrt, and a signed S3
request is built correctly. Debian's 0.44-3 has the same hard
dependency.

Rather than a MIR for python3-awscrt (a binding to the aws-c-* C library
stack), make it optional: move awscrt to upstream's existing, empty
"awslibs" extra and add Suggests: python3-awscrt.

Tested in a stonking container: 0.44-3ubuntu1 (Debian 0.44-3 plus this
change) builds, the build-time tests pass (27 passed), the binary
depends on python3-botocore, python3-configargparse, python3-requests,
python3-boto3 and python3-urllib3 (Suggests: python3-awscrt), and the
pybuild-autopkgtest passes.

If SigV4a support from the main package is a requirement for ceilometer,
the alternative is a MIR for python3-awscrt.

** Affects: python-awscurl (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: update-excuse

** Tags added: update-excuse

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https://bugs.launchpad.net/bugs/2169694

Title:
  python3-awscurl (main) depends on python3-awscrt (universe), blocking
  migration; awscrt is only needed for SigV4a

Status in python-awscurl package in Ubuntu:
  New

Bug description:
  python-awscurl 0.44-0ubuntu1 cannot migrate:

    python3-awscurl/amd64 in main cannot depend on python3-awscrt in
  universe

  python3-awscurl is in main because python3-ceilometer depends on it.
  The new python3-awscrt dependency comes only from "awscrt" in
  install_requires in setup.py (via ${python3:Depends}). awscurl only
  uses awscrt for SigV4a signing (botocore.crt.auth.CrtS3SigV4AsymAuth).
  Regular SigV4 signing, the default, works without it. I checked: "from
  botocore import crt" imports fine without awscrt, and a signed S3
  request is built correctly. Debian's 0.44-3 has the same hard
  dependency.

  Rather than a MIR for python3-awscrt (a binding to the aws-c-* C
  library stack), make it optional: move awscrt to upstream's existing,
  empty "awslibs" extra and add Suggests: python3-awscrt.

  Tested in a stonking container: 0.44-3ubuntu1 (Debian 0.44-3 plus this
  change) builds, the build-time tests pass (27 passed), the binary
  depends on python3-botocore, python3-configargparse, python3-requests,
  python3-boto3 and python3-urllib3 (Suggests: python3-awscrt), and the
  pybuild-autopkgtest passes.

  If SigV4a support from the main package is a requirement for
  ceilometer, the alternative is a MIR for python3-awscrt.

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