add pi::config & pi::config::fragment

.fixtures.yml

@@ -3,5 +3,7 @@
 ---
 fixtures:
   forge_modules:
+    stdlib: puppetlabs/stdlib  # dep of puppetlabs/concat
     augeas: camptocamp/augeas
     reboot: puppetlabs/reboot
+    concat: puppetlabs/concat

examples/config.pp

@@ -0,0 +1 @@
+include pi::cmdline

examples/config_fragment.pp

@@ -0,0 +1,14 @@
+class { 'pi::config':
+  reboot => false,  # reboots are problematic for acceptance testing
+}
+
+pi::config::fragment { 'disable_overscan=1': }
+pi::config::fragment { 'dtparam=audio=on':
+  order => 1,
+}
+pi::config::fragment { 'hdmi_mode=1':
+  order => 99,
+}
+pi::config::fragment { 'foo':
+  content => "hdmi_safe=1\n",
+}

examples/fragments.pp

@@ -0,0 +1,20 @@
+class { 'pi::config':
+  reboot    => false,  # reboots are problematic for acceptance testing
+  fragments => {
+    'dtoverlay=pps-gpio,gpiopin=4' => {
+      'order' => 99,
+    },
+    'dtparam=i2c_arm=on'           => {
+      'order' => 1,
+    },
+    'dtparam=spi=on'               => {},
+    'serial port'                  => {
+      # lint:ignore:strict_indent
+      'content' => @("CONTENT"),
+        enable_uart=1
+        init_uart_baud=9600
+        | CONTENT
+      # lint:endignore
+    },
+  },
+}

manifests/config.pp

@@ -0,0 +1,33 @@
+# @summary
+#   Manages `/boot/config.txt`
+#
+# @param fragments
+#  A hash of profile::pi::config::fragments to be concatenated into
+#  `/boot/config.txt`.
+#
+# @param reboot
+#   Whether or not to force a reboot when `/boot/config.txt` changes.
+#
+class pi::config (
+  Hash[String[1], Hash] $fragments = {},
+  Boolean $reboot = true,
+) {
+  concat { '/boot/config.txt':
+    ensure => present,
+    mode   => '0755',  # this is the default, +x seems odd
+  }
+
+  $fragments.each | String $name, Hash $conf | {
+    pi::config::fragment { $name:
+      * => $conf,
+    }
+  }
+
+  if ($reboot) {
+    reboot { '/boot/config.txt':
+      apply   => finished,
+      message => 'Rebooting to apply /boot/config.txt changes',
+      when    => refreshed,
+    }
+  }
+}

manifests/config/fragment.pp

@@ -0,0 +1,30 @@
+# @summary
+#  Create a /boot/config.txt fragment
+#
+# @param content
+#   /boot/config.txt configuration fragment
+#
+# @param order
+#   Order of the fragment within /boot/config.txt
+#
+define pi::config::fragment (
+  Optional[String[1]] $content = undef,
+  Integer[1] $order = 50,
+) {
+  include pi::config
+
+  $_real_content = $content ? {
+    undef => "${name}\n",
+    default => $content,
+  }
+
+  concat::fragment { $name:
+    target  => '/boot/config.txt',
+    content => $_real_content,
+    order   => $order,
+  }
+
+  if Class['pi::config']['reboot'] {
+    Concat::Fragment[$name] ~> Reboot['/boot/config.txt']
+  }
+}

metadata.json

@@ -13,6 +13,10 @@
     {
       "name": "puppetlabs/reboot",
       "version_requirement": ">= 5.0.0 < 6.0.0"
+    },
+    {
+      "name": "puppetlabs/concat",
+      "version_requirement": ">= 9.0.0 < 10.0.0"
     }
   ],
   "operatingsystem_support": [

spec/acceptance/config/fragment_spec.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require 'spec_helper_acceptance'
+
+describe 'pi::config::fragment define' do
+  let(:config_txt) do
+    <<~CONFIG
+      dtparam=audio=on
+      disable_overscan=1
+      hdmi_safe=1
+      hdmi_mode=1
+    CONFIG
+  end
+
+  include_context 'config.txt test setup'
+  include_examples 'the example', 'config_fragment.pp'
+
+  describe file('/boot/config.txt') do
+    it { is_expected.to be_file }
+    its(:content) { is_expected.to match config_txt }
+  end
+end

spec/acceptance/config_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'spec_helper_acceptance'
+
+describe 'pi::config class' do
+  context 'without any parameters' do
+    include_examples 'the example', 'config.pp'
+  end
+
+  context 'with parameters =>' do
+    let(:config_txt) do
+      <<~CONFIG
+        dtparam=i2c_arm=on
+        dtparam=spi=on
+        enable_uart=1
+        init_uart_baud=9600
+        dtoverlay=pps-gpio,gpiopin=4
+      CONFIG
+    end
+
+    include_context 'config.txt test setup'
+    include_examples 'the example', 'fragments.pp'
+
+    describe file('/boot/config.txt') do
+      it { is_expected.to be_file }
+      its(:content) { is_expected.to match config_txt }
+    end
+  end
+end

spec/classes/config_spec.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'pi::config' do
+  on_supported_os.each do |os, os_facts|
+    context "on #{os}" do
+      let(:facts) { os_facts }
+
+      it { is_expected.to compile.with_all_deps }
+
+      it { is_expected.to contain_concat('/boot/config.txt').with_mode('0755') }
+      it { is_expected.to contain_reboot('/boot/config.txt') }
+
+      context 'with fragments param' do
+        let(:params) do
+          {
+            fragments: {
+              'foo' => {
+                'content' => 'foo=bar',
+              },
+              'baz' => {
+                'content' => 'baz=quix',
+              },
+            },
+          }
+        end
+
+        it { is_expected.to contain_concat__fragment('foo').with_content('foo=bar') }
+        it { is_expected.to contain_concat__fragment('baz').with_content('baz=quix') }
+      end
+
+      context 'with reboot => false' do
+        let(:params) do
+          {
+            reboot: false,
+          }
+        end
+
+        it { is_expected.not_to contain_reboot('/boot/config.txt') }
+      end
+    end
+  end
+end

spec/defines/config/fragment_spec.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'pi::config::fragment' do
+  on_supported_os.each do |os, os_facts|
+    context "on #{os}" do
+      let(:facts) { os_facts }
+      let(:title) { 'foo' }
+      let(:params) { { 'content' => 'foo=bar' } }
+
+      it { is_expected.to compile.with_all_deps }
+
+      it do
+        is_expected.to contain_concat__fragment('foo').with(
+          target: '/boot/config.txt',
+          content: 'foo=bar',
+          order: 50,
+        ).that_notifies('Reboot[/boot/config.txt]')
+      end
+
+      context 'with reboot => false' do
+        let(:pre_condition) do
+          <<-PP
+          class { 'pi::config':
+            reboot => false,
+          }
+          PP
+        end
+
+        it do
+          is_expected.to contain_concat__fragment('foo').with(
+            target: '/boot/config.txt',
+            content: 'foo=bar',
+            order: 50,
+          )
+        end
+      end
+    end
+  end
+end

spec/support/acceptance/config.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+shared_context 'config.txt test setup' do
+  before(:context) do
+    shell('mkdir -p /boot')
+  end
+
+  after(:context) do
+    shell('rm -rf /boot/config.txt')
+  end
+end