Ubuntu
ply package

Misbuilds on focal: virtual packages are not provided

Bug #1920567 reported by Arnold Czémán on 2021-03-19

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	ply (Ubuntu)	Fix Released	Undecided	Unassigned
	Focal	Fix Released	Undecided	Unassigned

Bug Description

[Impact]

* If we (or a user) has to re-build ply, it misbuilds, silently.

[Test Plan]

Rebuild from source.
apt show python3-ply | grep Provides

Good:
Provides: python3-ply-lex-3.10, python3-ply-yacc-3.10

Bad:
Empty output.

[Where problems could occur]

* Pretty minimal risk, no library code changes.
Just getting things to build correctly, again.

[Other Info]

* The -4 upload included a port of the virtual package script to Python 3. Not backporting that, because it's a larger change.

[Original Bug Report]
Version: 3.11-3build1
Ubuntu release: 20.04

The python3-ply binary package should provide these virtual packages: python3-ply-lex-3.10, python3-ply-yacc-3.10, but it cannot provide them after a build in a fresh focal docker container.

This is because the provided virtual package names are generated by the 'debian/virtual-packages.py' script, which uses a shebang with '/usr/bin/python'. By default there is no 'python' binary on ubuntu focal.

One solution could be adding the 'python-is-python2' package as a build dependency. I have used this temporarily.

Or the shebang could be more specific: '/usr/bin/python2' or '/usr/bin/env python2'.

Or the script could be ported to python3 with a proper specific shebang.

It would also be useful to raise a build error, when the script fails.

See original description

Tags:

Revision history for this message

Stefano Rivera (stefanor) wrote on 2021-06-01:

The virtual packages are provided, as built, on Ubuntu 20.04:

# apt show python3-ply
Package: python3-ply
Version: 3.11-3build1
Priority: optional
Section: python
Source: ply
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: JCF Ploemen (jcfp) <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 256 kB
Provides: python3-ply-lex-3.10, python3-ply-yacc-3.10
Depends: python3:any
Suggests: python-ply-doc, python3-pkg-resources
Homepage: https://www.dabeaz.com/ply/
Task: dns-server, ubuntustudio-desktop-core, ubuntustudio-desktop
Download-Size: 46.4 kB
APT-Sources: http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
Description: Lex and Yacc implementation for Python3

But not when rebuilt from source.

summary:	- virtual packages are not provided + Misbuilds on focal: virtual packages are not provided
Changed in ply (Ubuntu):
status:	New → Fix Released

Stefano Rivera (stefanor) on 2021-06-01

description:

updated

Revision history for this message

Stefano Rivera (stefanor) wrote on 2021-06-01:

ply_3.11-3ubuntu0.1.debdiff Edit (1.8 KiB, text/plain)

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2021-06-04: Please test proposed package

Hello Arnold, or anyone else affected,

Accepted ply into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ply/3.11-3ubuntu0.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in ply (Ubuntu Focal):
status:	New → Fix Committed
tags:	added: verification-needed verification-needed-focal

Revision history for this message

Ubuntu SRU Bot (ubuntu-sru-bot) wrote on 2021-06-05: Autopkgtest regression report (ply/3.11-3ubuntu0.1)

All autopkgtests for the newly accepted ply (3.11-3ubuntu0.1) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

astropy/4.0-4ubuntu1 (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/focal/update_excuses.html#ply

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Revision history for this message

Stefano Rivera (stefanor) wrote on 2021-06-05:

Autopkgtest failure was a networking glitch. Retried and it succeeded.

tags:

added: verification-done verification-done-focal
removed: verification-needed verification-needed-focal

Revision history for this message

Stefano Rivera (stefanor) wrote on 2021-06-05:

Build looks good to me, it has the Provides line. Marking as verified.

Revision history for this message

Arnold Czémán (cemiarni) wrote on 2021-06-07:

Build looks good to me, too. Thank you.

Revision history for this message

Launchpad Janitor (janitor) wrote on 2021-06-15:

This bug was fixed in the package ply - 3.11-3ubuntu0.1

---------------
ply (3.11-3ubuntu0.1) focal; urgency=medium

* Use python2.7 in debian/rules, to generate Provides. (LP: #1920567)

-- Stefano Rivera <email address hidden> Tue, 01 Jun 2021 11:05:04 -0400

Changed in ply (Ubuntu Focal):
status:	Fix Committed → Fix Released

Revision history for this message

Brian Murray (brian-murray) wrote on 2021-06-15: Update Released

The verification of the Stable Release Update for ply has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.