Some php5 packages not upgraded to php7 from 14.04 to 16.04

[DigiAngel]

For reference:

https://answers.launchpad.net/ubuntu/+question/364164

libapache2-mod-php5 doesn't appear to get upgraded to libapache2-mod-php7, nor do a few others (mysql,sqlite). List of php packages on a working 14.04 install:

ii libapache2-mod-php5 5.5.9+dfsg-1ubuntu4.19 amd64 server-side, HTML-embedded scripting language (Apache 2 module)
ii php-auth 1.6.4-1 all Creating an authentication system
ii php-auth-sasl 1.0.6-1 all Abstraction of various SASL mechanism responses
ii php-db 1.7.14-2 all PHP PEAR Database Abstraction Layer
ii php-http-request 1.4.4-4 all PEAR class to provide an easy way to perform HTTP requests
ii php-log 1.12.7-1 all Logging Framework
ii php-mail 1.2.0-6 all Class that provides multiple interfaces for sending emails
ii php-mail-mime 1.8.8-1 all PHP PEAR module for creating MIME messages
ii php-mdb2 2.5.0b5-1 all merge of the PEAR DB and Metabase php database abstraction layers
ii php-net-dime 1.0.2-2 all class that implements DIME encoding
ii php-net-smtp 1.6.1-1 all PHP PEAR module implementing SMTP protocol
ii php-net-socket 1.0.14-1 all PHP PEAR Network Socket Interface module
ii php-net-url 1.0.15-3 all easy parsing of Urls
ii php-pear 5.5.9+dfsg-1ubuntu4.19 all PEAR - PHP Extension and Application Repository
ii php-soap 0.13.0-1 all SOAP Client/Server class for PHP
ii php5 5.5.9+dfsg-1ubuntu4.19 all server-side, HTML-embedded scripting language (metapackage)
ii php5-cli 5.5.9+dfsg-1ubuntu4.19 amd64 command-line interpreter for the php5 scripting language
ii php5-common 5.5.9+dfsg-1ubuntu4.19 amd64 Common files for packages built from the php5 source
ii php5-curl 5.5.9+dfsg-1ubuntu4.19 amd64 CURL module for php5
ii php5-gd 5.5.9+dfsg-1ubuntu4.19 amd64 GD module for php5
ii php5-imap 5.4.6-0ubuntu5 amd64 IMAP module for php5
ii php5-intl 5.5.9+dfsg-1ubuntu4.19 amd64 internationalisation module for php5
ii php5-json 1.3.2-2build1 amd64 JSON module for php5
ii php5-mcrypt 5.4.6-0ubuntu5 amd64 MCrypt module for php5
ii php5-mysql 5.5.9+dfsg-1ubuntu4.19 amd64 MySQL module for php5
ii php5-pspell 5.5.9+dfsg-1ubuntu4.19 amd64 pspell module for php5
ii php5-readline 5.5.9+dfsg-1ubuntu4.19 amd64 Readline module for php5
ii php5-sqlite 5.5.9+dfsg-1ubuntu4.19 amd64 SQLite module for php5

List after do-release-upgrade to 16.04:
ii php-auth 1.6.4-1build1 all Creating an authentication system
ii php-auth-sasl 1.0.6-2build1 all Abstraction of various SASL mechanism responses
ii php-cli 1:7.0+35ubuntu6 all command-line interpreter for the PHP scripting language (default)
ii php-common 1:35ubuntu6 all Common files for PHP packages
ii php-db 1.7.14-3build1 all PHP PEAR Database Abstraction Layer
ii php-imap 1:7.0+35ubuntu6 all IMAP module for PHP [default]
ii php-log 1.12.9-1build1 all Logging Framework
ii php-mail 1.3.0-1 all Class that provides multiple interfaces for sending emails
ii php-mdb2 2.5.0b5-1build1 all merge of the PEAR DB and Metabase php database abstraction layers
ii php-net-smtp 1.7.1-1build1 all PHP PEAR module implementing SMTP protocol
ii php-net-socket 1.0.14-1build1 all PHP PEAR Network Socket Interface module
ii php-pear 1:1.10.1+submodules+notgz-6 all PEAR Base System
ii php-soap 1:7.0+35ubuntu6 all SOAP module for PHP [default]
ii php-xml 1:7.0+35ubuntu6 all DOM, SimpleXML, WDDX, XML, and XSL module for PHP [default]
ii php7.0-cli 7.0.8-0ubuntu0.16.04.2 amd64 command-line interpreter for the PHP scripting language
ii php7.0-common 7.0.8-0ubuntu0.16.04.2 amd64 documentation, examples and common module for PHP
ii php7.0-imap 7.0.8-0ubuntu0.16.04.2 amd64 IMAP module for PHP
ii php7.0-json 7.0.8-0ubuntu0.16.04.2 amd64 JSON module for PHP
ii php7.0-opcache 7.0.8-0ubuntu0.16.04.2 amd64 Zend OpCache module for PHP
ii php7.0-readline 7.0.8-0ubuntu0.16.04.2 amd64 readline module for PHP
ii php7.0-soap 7.0.8-0ubuntu0.16.04.2 amd64 SOAP module for PHP
ii php7.0-xml 7.0.8-0ubuntu0.16.04.2 amd64 DOM, SimpleXML, WDDX, XML, and XSL module for PHP

from /var/log/dist-upgrade/screenlog.0:

screenlog.0:dpkg: libapache2-mod-php5: dependency problems, but removing anyway as you requested:
screenlog.0: php5 depends on libapache2-mod-php5 (>= 5.5.9+dfsg-1ubuntu4.19) | libapache2-mod-php5filter (>= 5.5.9+dfsg-1ubuntu4.19) | php5-cgi (>= 5.5.9+dfsg-1ubuntu4.19) | php5-fpm (>= 5.5.9+dfsg-1ubuntu4.19); however:
screenlog.0: Package libapache2-mod-php5 is to be removed.
screenlog.0: Package libapache2-mod-php5filter is not installed.
screenlog.0:Removing libapache2-mod-php5 (5.5.9+dfsg-1ubuntu4.19) ...

Thank you.

[Nish Aravamudan (nacc)]

Hello and thank you for filing this report!

I am aware of the issue you referenced, but it's not necessarily an easy one to solve. The packages from 14.04 (php5 related) are replaced by those in 16.04 (php7.0 related), but e.g., the configuration files can't necessarily migrate -- so it's not a proper replacement, if that makes sense. Additionally, some packages simply don't exist any longer.

I believe similar cases have existed in the past, with major version bumps. I will definitely consider ways to make the upgrade more seamless, but it's more like there's a whole new version of PHP rather than a straightforward upgrade (in my mind).

The end-goal is to have php- based metapackages for everything in the core, which will ease these kinds of issues going forward (as php-* ends up depending on php7.0-* right now and in a future release (e.g., 17.04, say), we would change that dependency to be php7.1-*) and upgrades should work properly :) [with some additional work].

Ondřej, do you have any further comments you might provide here? Or insight into what Debian might do for the next release as an answer to similar questions?

Thanks,
Nish

[DigiAngel (jlay)]

Thank you Nish,

I appreciate the work on this. And I do understand that the upgrade
might not be possible. Perhaps a message during install then.."the
following PHP5 packages will not be upgraded to PHP7: <list here>. If
you required these packages then install via apt after upgrading"...or
something along those lines. Thanks again.

James

On 2016-09-06 14:05, Nish Aravamudan wrote:
> Hello and thank you for filing this report!
>
> I am aware of the issue you referenced, but it's not necessarily an
> easy
> one to solve. The packages from 14.04 (php5 related) are replaced by
> those in 16.04 (php7.0 related), but e.g., the configuration files
> can't
> necessarily migrate -- so it's not a proper replacement, if that makes
> sense. Additionally, some packages simply don't exist any longer.
>
> I believe similar cases have existed in the past, with major version
> bumps. I will definitely consider ways to make the upgrade more
> seamless, but it's more like there's a whole new version of PHP rather
> than a straightforward upgrade (in my mind).
>
> The end-goal is to have php- based metapackages for everything in the
> core, which will ease these kinds of issues going forward (as php-*
> ends
> up depending on php7.0-* right now and in a future release (e.g.,
> 17.04,
> say), we would change that dependency to be php7.1-*) and upgrades
> should work properly :) [with some additional work].
>
> Ondřej, do you have any further comments you might provide here? Or
> insight into what Debian might do for the next release as an answer to
> similar questions?
>
> Thanks,
> Nish
>
> ** Changed in: php5 (Ubuntu)
> Status: New => Triaged
>
> ** Changed in: php5 (Ubuntu)
> Importance: Undecided => Wishlist
>
> --
> You received this bug notification because you are subscribed to the
> bug
> report.
> https://bugs.launchpad.net/bugs/1617397
>
> Title:
> Some php5 packages not upgraded to php7 from 14.04 to 16.04
>
> Status in php5 package in Ubuntu:
> Triaged
>
> Bug description:
> For reference:
>
> https://answers.launchpad.net/ubuntu/+question/364164
>
> libapache2-mod-php5 doesn't appear to get upgraded to libapache2-mod-
> php7, nor do a few others (mysql,sqlite). List of php packages on a
> working 14.04 install:
>
> ii libapache2-mod-php5 5.5.9+dfsg-1ubuntu4.19 amd64 server-side,
> HTML-embedded scripting language (Apache 2 module)
> ii php-auth 1.6.4-1 all Creating an authentication system
> ii php-auth-sasl 1.0.6-1 all Abstraction of various SASL mechanism
> responses
> ii php-db 1.7.14-2 all PHP PEAR Database Abstraction Layer
> ii php-http-request 1.4.4-4 all PEAR class to provide an easy way to
> perform HTTP requests
> ii php-log 1.12.7-1 all Logging Framework
> ii php-mail 1.2.0-6 all Class that provides multiple interfaces for
> sending emails
> ii php-mail-mime 1.8.8-1 all PHP PEAR module for creating MIME
> messages
> ii php-mdb2 2.5.0b5-1 all merge of the PEAR DB and Metabase php
> database abstraction layers
> ii php-net-dime 1.0.2-2 all class that implements DIME encoding
> ii php-net-smtp 1.6.1-1 all PHP PEAR module implementing SMTP
> protocol
> ii php-ne...

[Nish Aravamudan (nacc)]

@jlay: To be honest, I haven't had any time to work on this, and the migration to PHP7.0 was in the release notes. We also just did the PHP7.1 transition in 17.10 and that goes well forward. I think the divergence from the packaging of php5 to php7.0 is just too large to resolve.

[DigiAngel (jlay)]

I undertand...thanks for looking at this.