Latest revision as of 08:06, 6 November 2012

Perl 5.16

Summary

Perl 5.16 brings a lot of changes. Details about them can be found in 5.16.0 perldelta document.

Owner

Name: Petr Písař
Email: <ppisar@redhat.com>

Name: Jitka Plesníková
Email: <jplesnik@redhat.com>

Current status

Targeted release: Fedora 18
Last updated: 2012-11-06
Percentage of completion: 100 %

Completed items

Get dedicated build-root from rel-engs (f18-perl)
Define perl_bootstrap in perl-srpm-macros
Build new perl 5.16 keeping old COMPAT Provides
Rebuild packages needed for minimal build-root
Rebuild dual-lived packages (otherwise yum recommends --skip-broken and fails)
Rebuild packages needed for building source packages from git repository
Remove old perl(:MODULE_COMPAT_5.14.*) from perl
Rebuild other packages: Use Fedora::Rebuild dependency solver or ordered sets computed by Paul
Undefine perl_bootstrap
Rebuild packages having perl_bootstrap condition in spec file again
Synchronize packages upgraded in f18 build root
Merge dedicated build-root to rawhide and remove the dedicated one by rel-engs
Rebuilt Perl packages: 2115 of 2115 done (100.00 %)

Detailed Description

New perl is released every year and updates containing mainly bug fixes follow during the year. The release 5.16.0 should be stable release, but 5.16.1 should follow very soon fixing issues introduced in 5.16.0.

Benefit to Fedora

Fedora as bleeding edge distribution should be shipping new release of perl as one of the first distributions.

Scope

Every Perl package will be rebuilt in testing build root f18-perl against perl 5.16.0 and then if no major problem emerges the packages will be merged back to f18 build root.

How to Test

Download packages from koji buildroot f18-perl or try building or using your packages with requirements related to perl.

User Experience

Dependencies

repoquery --whatrequires --alldeps 'perl(:MODULE_COMPAT_5.1?.?)' | sort -u

Contingency Plan

Revert changes in perl git master branch before 5.16 upgrade commit and drop f18-perl koji build-root.

Documentation

changes between 5.14.0 and 5.16.x http://search.cpan.org/dist/perl-5.16.0/pod/perldelta.pod
packaging guidelines http://fedoraproject.org/wiki/Packaging:Perl
how to update modules and dual-lived modules: https://fedoraproject.org/wiki/Perl/updates
new macros from rpm with different filter http://rpm.org/wiki/PackagerDocs/DependencyGenerator
external generator of dependencies (outside of rpm) perl.{prov,req}

Release Notes

New Features

Unicode 6.1
More consistent eval controlled with unicode_eval and evalbytes feature
2- and 3-argument substr called in left-value context is evaluted even after changing original string
New T_*REF_REFCOUNT_FIXED XS typemap fixing reference counter decremetion
New is_utf8_char_buf XS-callable function replaces broken is_utf8_char function
$$ variable is writable
Improved debugger: tracing mode can be restricted to certain level, breakpoints can be disabled temporarily, breakpoints can be set by file name
sort subroutines can be autoloaded
$[ variable is provided by arybase module
mmaped PerlIO layer is now a separate module PerlIO::mmap

Deprecated Features

Accessing Unicode database files directly is deprecated now; use Unicode::UCD instead
Version::Requirements is deprecated in favor of CPAN::Meta::Requirements

Incompatible Changes

Special blocks (e.g. BEGIN) are called in void context
Unoverloaded stringification of regular expression does not return the expression literal
T_DATAUNIT and T_CALLBACK XS typemaps removed
User defined case-changing has been removed in favor of Unicode::Casing
XSUB C functions are static now and they are not exported from their object files
Read-only references cannot be weaken
$$, $<, $>, $(, and $) do not cache their value
Devel::DProf, Shell have been removed from Perl core
perl4 libraries removed: abbrev.pl, assert.pl, bigfloat.pl, bigint.pl, bigrat.pl, cacheout.pl, complete.pl, ctime.pl, dotsh.pl, exceptions.pl, fastcwd.pl, flush.pl, getcwd.pl, getopt.pl, getopts.pl, hostname.pl, importenv.pl, lib/find{,depth}.pl, look.pl, newgetopt.pl, open2.pl, open3.pl, pwd.pl, hellwords.pl, stat.pl, tainted.pl, termcap.pl, timelocal.pl

Comments and Discussion

See Talk:Features/perl5.16

@@ Line 2: / Line 2: @@
 == Summary ==
-Perl 5.16 brings a lot of changes. Details about them could be found at perl [[http://search.cpan.org/dist/perl-5.16.0/pod/perldelta.pod delta]]
+Perl 5.16 brings a lot of changes. Details about them can be found in [http://search.cpan.org/dist/perl-5.16.0/pod/perldelta.pod 5.16.0 perldelta document].
 == Owner ==
@@ Line 13: / Line 13: @@
 == Current status ==
 * Targeted release: [[Releases/18 | Fedora 18 ]]
-* Last updated: 2012-06-07
+* Last updated: 2012-11-06
-* Percentage of completion: 1 %
+* Percentage of completion: 100 %
-* Development Status:
 === Completed items ===
@@ Line 24: / Line 23: @@
 * Rebuild dual-lived packages (otherwise yum recommends --skip-broken and fails)
 * Rebuild packages needed for building source packages from git repository
-=== Items in progress ===
-* Rebuilt Perl packages: 42 of 2089 done (2.01 %)
-=== Items still to be done ===
 * Remove old perl(:MODULE_COMPAT_5.14.*) from perl
 * Rebuild other packages: Use Fedora::Rebuild dependency solver or ordered sets computed by Paul
 * Undefine perl_bootstrap
 * Rebuild packages having perl_bootstrap condition in spec file again
-* Merge dedicated build-root to rawhide and remove the dedicated one by rel-engs
+* Synchronize packages upgraded in ''f18'' build root
+* Merge dedicated build-root to rawhide and remove the dedicated one [https://fedorahosted.org/rel-eng/ticket/5234 by rel-engs]
+* Rebuilt Perl packages: 2115 of 2115 done (100.00 %)
 == Detailed Description ==
-Perl releases will be now every year and updates during year will be containing mainly bug fixes. The release 5.16.0 should be stable release, but 5.16.1 should contain bugfixes for issues introduced in 5.16.0.
+New perl is released every year and updates containing mainly bug fixes follow during the year. The release 5.16.0 should be stable release, but 5.16.1 should follow very soon fixing issues introduced in 5.16.0.
 == Benefit to Fedora ==
@@ Line 42: / Line 38: @@
 == Scope ==
-Everything will be rebuilt in testing buildroot dist-f18-perltest. 'fedpkg build --target dist-f18-perltest'
+Every Perl package will be rebuilt in testing build root ''f18-perl'' against perl 5.16.0 and then if no major problem emerges the packages will be merged back to ''f18'' build root.
-* update perl to 5.16.1
-* update/fix/rebuild all perl modules
-* rebuild all other dependent packages -> file bugs to maintainers
-* in case no basic component is broken, then the packages could be tagged into dist-f18 buildroot
-== How To Test ==
+== How to Test ==
-Download packages from koji's buildroot dist-f16-perltest or try your packages with rebuild build requirements related to perl.
+Download packages from koji buildroot f18-perl or try building or using your packages with requirements related to perl.
 == User Experience ==
@@ Line 55: / Line 47: @@
 == Dependencies ==
-repoquery --whatrequires --alldeps 'perl(:MODULE_COMPAT_5.1?.?)' | sort -u
+<code>repoquery --whatrequires --alldeps 'perl(:MODULE_COMPAT_5.1?.?)' | sort -u</code>
 == Contingency Plan ==
-<!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "None necessary, revert to previous release behaviour."  Or it might not.  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
+Revert changes in ''perl'' git master branch before 5.16 upgrade commit and drop ''f18-perl'' koji build-root.
 == Documentation ==
@@ Line 68: / Line 60: @@
 == Release Notes ==
-<!-- The Fedora Release Notes inform end-users about what is new in the release.  Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ -->
-<!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns.  If there are any such changes involved in this feature, indicate them here.  You can also link to upstream documentation if it satisfies this need.  This information forms the basis of the release notes edited by the documentation team and shipped with the release. -->
+=== New Features ===
-*
+* Unicode 6.1
+* More consistent ''eval'' controlled with ''unicode_eval'' and ''evalbytes'' feature
+* 2- and 3-argument ''substr'' called in left-value context is evaluted even after changing original string
+* New ''T_*REF_REFCOUNT_FIXED'' XS typemap fixing reference counter decremetion
+* New ''is_utf8_char_buf'' XS-callable function replaces broken ''is_utf8_char'' function
+* ''$$'' variable is writable
+* Improved debugger: tracing mode can be restricted to certain level, breakpoints can be disabled temporarily, breakpoints can be set by file name
+* ''sort'' subroutines can be autoloaded
+* ''$['' variable is provided by ''arybase'' module
+* mmaped PerlIO layer is now a separate module ''PerlIO::mmap''
+=== Deprecated Features ===
+* Accessing Unicode database files directly is deprecated now; use ''Unicode::UCD'' instead
+* ''Version::Requirements'' is deprecated in favor of ''CPAN::Meta::Requirements''
+=== Incompatible Changes ===
+* Special blocks (e.g. ''BEGIN'') are called in void context
+* Unoverloaded stringification of regular expression does not return the expression literal
+* ''T_DATAUNIT'' and ''T_CALLBACK'' XS typemaps removed
+* User defined case-changing has been removed in favor of ''Unicode::Casing''
+* XSUB C functions are static now and they are not exported from their object files
+* Read-only references cannot be weaken
+* ''$$'',  ''$<'', ''$>'', ''$('', and ''$)'' do not cache their value
+* ''Devel::DProf'', ''Shell'' have been removed from Perl core
+* perl4 libraries removed: abbrev.pl, assert.pl, bigfloat.pl, bigint.pl, bigrat.pl, cacheout.pl, complete.pl, ctime.pl, dotsh.pl, exceptions.pl, fastcwd.pl, flush.pl, getcwd.pl, getopt.pl, getopts.pl, hostname.pl, importenv.pl, lib/find{,depth}.pl, look.pl, newgetopt.pl, open2.pl, open3.pl, pwd.pl, hellwords.pl, stat.pl, tainted.pl, termcap.pl, timelocal.pl
 == Comments and Discussion ==
 * See [[Talk:Features/perl5.16]]
-[[Category:FeaturePageIncomplete]]
+[[Category:FeatureAcceptedF18]]
 <!-- When your feature page is completed and ready for review -->
 <!-- remove Category:FeaturePageIncomplete and change it to Category:FeatureReadyForWrangler -->
 <!-- After review, the feature wrangler will move your page to Category:FeatureReadyForFesco... if it still needs more work it will move back to Category:FeaturePageIncomplete-->

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