[feature request] Account for provider binaries in SCL PHP paths

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 4.10.7
• Ruby: ruby 2.0.0p648 (2015-12-16) [x86_64-linux]
• Distribution: CentOS Linux release 7.2.1511 (Core)
• Module version: 96e89d6b239701a596ef597f6ec78a59313ea0b5

How to reproduce (e.g Puppet code you use)

• Install PHP from SCL
• Configure module similar to:

php::globals::php_version: '7.1'
php::globals::config_root: '/etc/opt/rh/rh-php71'
php::package_prefix: 'rh-php71-php-'
php::extensions:
  yaml:
    provider: 'pecl'
    header_packages:
      - 'libyaml-devel'

What are you seeing

Pecl/pear providers will fail since their binaries are in non standard paths. For example, binaries are located in /opt/rh/rh-php71/root/usr/bin/pear for SCL PHP 7.1 on CentOS/RedHat 7.

What behaviour did you expect instead

It'd great if the pecl/pear providers could account for pear/pecl SCL binaries.

Output log

Error: /Package[yaml]: Provider pecl is not functional on this host
Debug: Php::Extension::Install[yaml]: Resource is being skipped, unscheduling all events
Debug: Php::Extension::Config[yaml]: Resource is being skipped, unscheduling all events
Debug: Php::Config[yaml]: Resource is being skipped, unscheduling all events
Debug: Php::Config::Setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]: Resource is being skipped, unscheduling all events
Notice: /Stage[main]/Php/Php::Extension[yaml]/Php::Extension::Config[yaml]/Php::Config[yaml]/Php::Config::Setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]/Ini_setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]: Dependency Package[yaml] has failures: true
Warning: /Stage[main]/Php/Php::Extension[yaml]/Php::Extension::Config[yaml]/Php::Config[yaml]/Php::Config::Setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]/Ini_setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]: Skipping because of failed dependencies
Debug: /Stage[main]/Php/Php::Extension[yaml]/Php::Extension::Config[yaml]/Php::Config[yaml]/Php::Config::Setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]/Ini_setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]: Resource is being skipped, unscheduling all events
Debug: Php::Config::Setting[/etc/opt/rh/rh-php71/php.d/yaml.ini: extension]: Resource is being skipped, unscheduling all events
Debug: Php::Config[yaml]: Resource is being skipped, unscheduling all events
Debug: Php::Extension::Config[yaml]: Resource is being skipped, unscheduling all events
Debug: Php::Extension[yaml]: Resource is being skipped, unscheduling all events

Any additional information you'd like to impart

I'm using this module to install SCL PHP 7.1. I also need yaml module. Since there is no package for it, pecl is being used to install it.

As a workaround I'm creating symlinks to the pecl/pear binaries:

file {
  default: ensure => link ;
  '/usr/bin/pear': target => '/opt/rh/rh-php71/root/usr/bin/pear' ;
  '/usr/bin/pecl': target => '/opt/rh/rh-php71/root/usr/bin/pecl' ;
}

Start at the PECL and PEAR provider entry points and reproduce the issue with the supplied SCL PHP 7.1 configuration on CentOS. Trace how provider binaries are located and verify the provider becomes functional for the yaml extension without creating /usr/bin/pear or /usr/bin/pecl symlinks.