| Dist::CheckConflicts(3pm) - phpMan
Dist::CheckConflicts(3pm) User Contributed Perl Documentation Dist::CheckConflicts(3pm)
NAME
Dist::CheckConflicts - declare version conflicts for your dist
VERSION
version 0.11
SYNOPSIS
use Dist::CheckConflicts
-dist => 'Class-MOP',
-conflicts => {
'Moose' => '1.14',
'namespace::autoclean' => '0.08',
},
-also => [
'Package::Stash::Conflicts',
];
__PACKAGE__->check_conflicts;
DESCRIPTION
One shortcoming of the CPAN clients that currently exist is that they have no way of
specifying conflicting downstream dependencies of modules. This module attempts to work
around this issue by allowing you to specify conflicting versions of modules separately,
and deal with them after the module is done installing.
For instance, say you have a module "Foo", and some other module "Bar" uses "Foo". If
"Foo" were to change its API in a non-backwards-compatible way, this would cause "Bar" to
break until it is updated to use the new API. "Foo" can't just depend on the fixed version
of "Bar", because this will cause a circular dependency (because "Bar" is already
depending on "Foo"), and this doesn't express intent properly anyway - "Foo" doesn't use
"Bar" at all. The ideal solution would be for there to be a way to specify conflicting
versions of modules in a way that would let CPAN clients update conflicting modules
automatically after an existing module is upgraded, but until that happens, this module
will allow users to do this manually.
This module accepts a hash of options passed to its "use" statement, with these keys being
valid:
-conflicts
A hashref of conflict specifications, where keys are module names, and values are the
last broken version - any version greater than the specified version should work.
-also
Additional modules to get conflicts from (potentially recursively). This should
generally be a list of modules which use Dist::CheckConflicts, which correspond to the
dists that your dist depends on. (In an ideal world, this would be intuited directly
from your dependency list, but the dependency list isn't available outside of build
time).
-dist
The name of the distribution, to make the error message from check_conflicts more
user-friendly.
The methods listed below are exported by this module into the module that uses it, so you
should call these methods on your module, not Dist::CheckConflicts.
As an example, this command line can be used to update your modules, after installing the
"Foo" dist (assuming that "Foo::Conflicts" is the module in the "Foo" dist which uses
Dist::CheckConflicts):
perl -MFoo::Conflicts -e'print "$_\n"
for map { $_->{package} } Foo::Conflicts->calculate_conflicts' | cpanm
As an added bonus, loading your conflicts module will provide warnings at runtime if
conflicting modules are detected (regardless of whether they are loaded before or
afterwards).
METHODS
conflicts
Returns the conflict specification (the "-conflicts" parameter to "import()"), as a hash.
dist
Returns the dist name (either as specified by the "-dist" parameter to "import()", or the
package name which "use"d this module).
check_conflicts
Examine the modules that are currently installed, and throw an exception with useful
information if any modules are at versions which conflict with the dist.
calculate_conflicts
Examine the modules that are currently installed, and return a list of modules which
conflict with the dist. The modules will be returned as a list of hashrefs, each
containing "package", "installed", and "required" keys.
BUGS
No known bugs.
Please report any bugs to GitHub Issues at
<https://github.com/doy/dist-checkconflicts/issues>.
SEE ALSO
Module::Install::CheckConflicts
Dist::Zilla::Plugin::Conflicts
SUPPORT
You can find this documentation for this module with the perldoc command.
perldoc Dist::CheckConflicts
You can also look for information at:
· MetaCPAN
<https://metacpan.org/release/Dist-CheckConflicts>
· Github
<https://github.com/doy/dist-checkconflicts>
· RT: CPAN's request tracker
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Dist-CheckConflicts>
· CPAN Ratings
<http://cpanratings.perl.org/d/Dist-CheckConflicts>
AUTHOR
Jesse Luehrs <doy AT tozt.net>
COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Jesse Luehrs.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.
perl v5.18.2 2014-04-03 Dist::CheckConflicts(3pm)
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