Update to work with Ubuntu Xenial

Changes to work with Xenial

 - Set up service via systemd instead of upstart.
 - defualt to using nodejs v6.x because of library issues.
 - upstream nodejs puppet knows how to do legacy symlinks on required
   platforms.

Depends-On: Ia7966fb9578d0d79f3a7f9480e3a956555737dc8
Change-Id: Ia3f4d3bbacbbe1a42a33a4f934173fb54a582a8e

manifests/init.pp

@@ -16,11 +16,38 @@ class ethercalc (
   $ethercalc_user   = 'ethercalc',
   $ethercalc_version= '0.20161220.1',
   # If set to system will install system package.
-  $nodejs_version   = 'node_4.x',
+  $nodejs_version   = undef,
 ) {
 
   $path = '/usr/local/bin:/usr/bin:/bin'
 
+  # For trusty default to upstart, node 4.x.  For Xenial use node 6.x
+  # for updated dependencies and the default systemd service file
+  case $facts['os']['family'] {
+    'Debian': {
+      if $facts['os']['release']['full'] =~ /^14\.04$/ {
+        $use_upstart = true
+        if ! $nodejs_version {
+          $nodejs_version = 'node_4.x'
+        }
+      }
+      elsif $facts['os']['release']['full'] =~ /^16\.04$/ {
+        if ! $nodejs_version {
+          $nodejs_version = '6.x'
+        }
+      } else {
+        fail('This module is not supported on this platform')
+      }
+    }
+    default: {
+      # TODO(ianw) -- not sure this is a sane default, but it's the
+      # way it was...
+      if ! $nodejs_version {
+        $nodejs_version = 'node_4.x'
+      }
+    }
+  }
+
   group { $ethercalc_user:
     ensure => present,
   }
@@ -60,33 +87,59 @@ class ethercalc (
     }
   }
 
-  file { '/usr/local/bin/node':
-    ensure  => link,
-    target  => '/usr/bin/nodejs',
-    require => Anchor['nodejs-package-install'],
-    before  => Anchor['nodejs-anchor'],
-  }
-
-  anchor { 'nodejs-anchor': }
-
   exec { 'install-ethercalc':
     command => "npm install ethercalc@${ethercalc_version}",
     unless  => "npm ls | grep ethercalc@${ethercalc_version}",
     path    => $path,
     cwd     => $base_install_dir,
-    require => Anchor['nodejs-anchor'],
+    require => Anchor['nodejs-package-install'],
   }
 
-  file { '/etc/init/ethercalc.conf':
-    ensure  => present,
-    content => template('ethercalc/upstart.erb'),
-    replace => true,
-    owner   => 'root',
-  }
+  # TODO(ianw): remote this when trusty is dropped
+  if defined($use_upstart) {
+
+    file { '/etc/init/ethercalc.conf':
+      ensure  => present,
+      content => template('ethercalc/upstart.erb')
+      replace => true,
+      owner   => 'root',
+    }
+
+    file { '/etc/init.d/ethercalc':
+      ensure => link,
+      target => '/lib/init/upstart-job'
+    }
+
+    service { 'ethercalc':
+      ensure  => running,
+      enable  => true,
+      require => File['/etc/init/ethercalc.conf'],
+    }
+
+  } else {
+
+    file { '/etc/systemd/system/ethercalc.service':
+      ensure  => present,
+      content => template('ethercalc/ethercalc.service.erb'),
+      replace => true,
+      owner   => 'root',
+    }
+
+    # This is a hack to make sure that systemd is aware of the new service
+    # before we attempt to start it.
+    exec { 'ethercalc-systemd-daemon-reload':
+      command     => '/bin/systemctl daemon-reload',
+      before      => Service['ethercalc'],
+      subscribe   => File['/etc/systemd/system/ethercalc.service'],
+      refreshonly => true,
+    }
+
+    service { 'ethercalc':
+      ensure  => running,
+      enable  => true,
+      require => File['/etc/init/ethercalc.conf'],
+    }
 
-  file { '/etc/init.d/ethercalc':
-    ensure => link,
-    target => '/lib/init/upstart-job',
   }
 
   file { "${base_log_dir}/${ethercalc_user}":
@@ -94,12 +147,6 @@ class ethercalc (
     owner  => $ethercalc_user,
   }
 
-  service { 'ethercalc':
-    ensure  => running,
-    enable  => true,
-    require => File['/etc/init/ethercalc.conf'],
-  }
-
   include ::logrotate
   logrotate::file { 'ethercalc_error':
     log     => "${base_log_dir}/${ethercalc_user}/error.log",

templates/ethercalc.service.erb

@@ -0,0 +1,13 @@
+[Unit]
+Description=ethercalc (real-time collaborative spreadsheet editing)
+After=syslog.target network.target
+
+[Service]
+Type=simple
+User=<%= @ethercalc_user %>
+Group=<%= @ethercalc_user %>
+ExecStart=/bin/bash <%= @base_install_dir %>/node_modules/ethercalc/bin/run.sh
+LimitNOFILE=8192:16384
+
+[Install]
+WantedBy=multi-user.target