[users] Add .conf entries for hostname settings

- Set hostname not-at-all, or via one of two mechanisms
 - Write /etc/hosts or not

src/modules/users/UsersViewStep.cpp

@@ -141,8 +141,7 @@ UsersViewStep::onLeave()
     j = new SetPasswordJob( "root", m_widget->getRootPassword() );
     m_jobs.append( Calamares::job_ptr( j ) );
 
-    j = new SetHostNameJob( m_widget->getHostname(),
+    j = new SetHostNameJob( m_widget->getHostname(), m_actions );
-                            SetHostNameJob::Action::EtcHostname | SetHostNameJob::Action::EtcHosts );
     m_jobs.append( Calamares::job_ptr( j ) );
 }
 
@@ -206,4 +205,21 @@ UsersViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     // Now it might be explicitly set to empty, which is ok
 
     Calamares::JobQueue::instance()->globalStorage()->insert( "userShell", shell );
+
+    using Action = SetHostNameJob::Action;
+
+    QString hostnameActionString = CalamaresUtils::getString( configurationMap, "setHostname" );
+    if ( hostnameActionString.isEmpty() )
+    {
+        hostnameActionString = QStringLiteral( "EtcFile" );
+    }
+    bool ok = false;
+    auto hostnameAction = hostnameActions().find( hostnameActionString, ok );
+    if ( !ok )
+    {
+        hostnameAction = Action::EtcHostname;
+    }
+
+    Action hostsfileAction = getBool( configurationMap, "writeHostsFile", true ) ? Action::EtcHosts : Action::None;
+    m_actions = hostsfileAction | hostnameAction;
 }

src/modules/users/users.conf

@@ -28,13 +28,13 @@ defaultGroups:
 # Disable when your Distribution does not require such a group.
 autologinGroup:  autologin
 # You can control the initial state for the 'autologin checkbox' here.
-# Possible values are: 
+# Possible values are:
-#  - true to check or 
+#  - true to check or
 #  - false to uncheck
 # These set the **initial** state of the checkbox.
 doAutologin:     true
 
-# When *sudoersGroup* is set to a non-empty string, Calamares creates a 
+# When *sudoersGroup* is set to a non-empty string, Calamares creates a
 # sudoers file for the user. This file is located at:
 #     `/etc/sudoers.d/10-installer`
 # Remember to add the (value of) *sudoersGroup* to *defaultGroups*.
@@ -48,8 +48,8 @@ sudoersGroup:    wheel
 # Setting this to false , causes the root account to be disabled.
 setRootPassword: true
 # You can control the initial state for the 'reuse password for root'
-# checkbox here. Possible values are: 
+# checkbox here. Possible values are:
-#  - true to check or 
+#  - true to check or
 #  - false to uncheck
 #
 # When checked, the user password is used for the root account too.
@@ -96,18 +96,18 @@ passwordRequirements:
     libpwquality:
         - minlen=0
         - minclass=0
-        
+
 # You can control the visibility of the 'strong passwords' checkbox here.
-# Possible values are: 
+# Possible values are:
-#  - true to show or 
+#  - true to show or
 #  - false to hide  (default)
 # the checkbox. This checkbox allows the user to choose to disable
 # password-strength-checks. By default the box is **hidden**, so
 # that you have to pick a password that satisfies the checks.
 allowWeakPasswords: false
 # You can control the initial state for the 'strong passwords' checkbox here.
-# Possible values are: 
+# Possible values are:
-#  - true to uncheck or 
+#  - true to uncheck or
 #  - false to check (default)
 # the checkbox by default. Since the box is labeled to enforce strong
 # passwords, in order to **allow** weak ones by default, the box needs
@@ -122,3 +122,17 @@ allowWeakPasswordsDefault: false
 #  - set, non-empty, use that path as shell. No validation is done
 #    that the shell actually exists or is executable.
 # userShell: /bin/bash
+
+# Hostname setting
+#
+# The user can enter a hostname; this is configured into the system
+# in some way; pick one of:
+#   - *None*, to not set the hostname at all
+#   - *EtcFile*, to write to `/etc/hostname` directly
+#   - *Hostnamed*, to use systemd hostnamed(1) over DBus
+# The default is *EtcFile*.
+setHostname: EtcFile
+
+# Should /etc/hosts be written with a hostname for this machine
+# (also adds localhost and some ipv6 standard entries).
+writeHostsFile: true