Optionally create dependency on EPEL module

README.md

@@ -40,7 +40,8 @@ previous commits.
 
 On RHEL/CentOS platforms you will need to have access to the EPEL repository
 by using [puppet/epel](https://forge.puppet.com/puppet/epel) or by other
-means.
+means.  If using the EPEL repository module, this module will include it by
+default.  To override, set `assume_epel` to True.
 
 ### Beginning with etckeeper
 
@@ -75,7 +76,7 @@ This module has been built on and tested against Puppet 5 and higher.
 
 The module has been tested on:
 
-* Red Hat/CentOS Enterprise Linux 6/7
+* RedHat Enterprise/CentOS Linux 6/7/8
 * Ubuntu 14.04/16.04
 * Debian 7/8
 

data/common.yaml

@@ -1,4 +1,5 @@
 ---
+etckeeper::assume_epel: ~
 etckeeper::avoid_commit_before_install: ~
 etckeeper::avoid_daily_autocommits: ~
 etckeeper::avoid_special_file_warning: ~

manifests/config.pp

@@ -1,6 +1,7 @@
 # @!visibility private
 class etckeeper::config {
 
+  $assume_epel                 = $etckeeper::assume_epel
   $avoid_commit_before_install = $etckeeper::avoid_commit_before_install
   $avoid_daily_autocommits     = $etckeeper::avoid_daily_autocommits
   $avoid_special_file_warning  = $etckeeper::avoid_special_file_warning

manifests/init.pp

@@ -15,6 +15,7 @@
 #     vcs_user_email => 'alice@example.com',
 #   }
 #
+# @param assume_epel Assume EPEL repository installed (Red Hat variants only)
 # @param avoid_commit_before_install
 # @param avoid_daily_autocommits
 # @param avoid_special_file_warning
@@ -37,6 +38,7 @@
 #
 # @since 1.0.0
 class etckeeper (
+  Optional[Boolean]                    $assume_epel,
   Optional[Boolean]                    $avoid_commit_before_install,
   Optional[Boolean]                    $avoid_daily_autocommits,
   Optional[Boolean]                    $avoid_special_file_warning,

manifests/install.pp

@@ -1,7 +1,16 @@
 # @!visibility private
 class etckeeper::install {
 
-  package { $etckeeper::package_name:
+  # if RedHat, need to have EPEL installed
+  if $::osfamily == 'RedHat' and ! $::etckeeper::assume_epel {
+    if defined(Class['epel']) {
+      Class['epel'] -> Package[$::etckeeper::package_name]
+    }
+    else {
+      warning("Without EPEL repository configured, I probably won't be able to find package ${::etckeeper::package_name}.  See \$assume_epel for more information.")
+    }
+  }
+  package { $::etckeeper::package_name:
     ensure => present,
   }