Add SemVerRange support to yum package provider

Implement Version Range type support for the yum provider.

Sample manifest with a range passed for a package:

package { 'puppet-agent':

  ensure => '>= 6.5'

}

package { 'puppet-agent':

  ensure => '< 6.4'

}

package { 'puppet-agent':

  ensure => '>6.4 <=7'

}

The yum provider does not support a version range passed in the install command, so we have to:

• find out the available versions for a specific package (usually with yum list --showduplicates)
• install the most recent package which respects the range.

We should also make sure we don't take additional actions if the range is already satisfied (i.e. puppet apply with a SemVerRange should be idempotent)

Sample code on how the ensure property can be treated inside the provider:

if @resource.should(:ensure).is_a?(SemanticPuppet::VersionRange)

  # these should be sorted in descending order

  _, *versions = `yum list -d 0 -e 1 --showduplicates #{@resource.name} | awk '{print $2}'`.split

  range = @resource.should(:ensure)

  available.versions.any? { |version| range.include?(version.to_stable) }

end

Example yum install with a specific version (package name and version are joined by a dash):

yum install puppet-agent-6.0.4-1.el7

Limitations of Version Ranges: YUM provider is using RPM to compare package versions and no epoch is considered `zero` epoch. As a consequence to this we need to specify also the epoch if we don't want the default behaviour

For example:

• >1 <2 will search in (0:1, 0:2) interval
• >1 <1:2 will search in (0:1, 1:2) interval, eligible versions will be searched in bot 0 and 1 epoch
• >1 will consider any version form epoch 0, greater that 1 and any version with epoch > 0