bash -l -c 'puppet module list --render-as yaml'

[root@broker Downloads]# bash -l -c 'puppet module list --render-as yaml'
---
  /etc/puppet/modules:
    - !ruby/object:Puppet::Module
      name: ntp
      path: /etc/puppet/modules/ntp
      environment: production
      metadata_file: /etc/puppet/modules/ntp/metadata.json
      forge_name: puppetlabs/ntp
      source: "git://github.com/puppetlabs/puppetlabs-ntp"
      author: "Puppet Labs"
      version: "3.0.1"
      license: "Apache Version 2.0"
      puppetversion:
      dependencies:
        - name: puppetlabs/stdlib
          version_requirement: ">= 0.1.6"
      absolute_path_to_manifests: !ruby/object:Puppet::FileSystem::AbsolutePathPattern
        pathname: !ruby/object:Pathname
          path: /etc/puppet/modules/ntp/manifests
    - !ruby/object:Puppet::Module
      name: openshift_origin
      path: /etc/puppet/modules/openshift_origin
      environment: production
      metadata_file: /etc/puppet/modules/openshift_origin/metadata.json
      forge_name: openshift/openshift_origin
      source: "git://github.com/openshift/puppet-openshift_origin.git"
      author: "Mojo Lingo, Red Hat"
      version: "3.0.1"
      license: ASL
      puppetversion:
      dependencies:
        - name: puppetlabs/ntp
          version_requirement: ">=0.1.0"
        - name: puppetlabs/stdlib
          version_requirement: ">=2.6.0"
      absolute_path_to_manifests: !ruby/object:Puppet::FileSystem::AbsolutePathPattern
        pathname: !ruby/object:Pathname
          path: /etc/puppet/modules/openshift_origin/manifests
    - !ruby/object:Puppet::Module
      name: stdlib
      path: /etc/puppet/modules/stdlib
      environment: production
      metadata_file: /etc/puppet/modules/stdlib/metadata.json
      forge_name: puppetlabs/stdlib
      source: "git://github.com/puppetlabs/puppetlabs-stdlib.git"
      author: puppetlabs
      version: "4.1.0"
      license: "Apache 2.0"
      puppetversion:
      dependencies: []
      absolute_path_to_manifests: !ruby/object:Puppet::FileSystem::AbsolutePathPattern
        pathname: !ruby/object:Pathname
          path: /etc/puppet/modules/stdlib/manifests
  /usr/share/puppet/modules: []