app/status: Display update driver info

Read from `/run/rpm-ostree/update-driver.gv` and display the update
driver name (and systemd unit if verbose).

src/app/rpmostree-builtin-status.cxx

@@ -31,6 +31,7 @@
 #include "rpmostree-builtins.h"
 #include "rpmostree-ex-builtins.h"
 #include "rpmostree-libbuiltin.h"
+#include "rpmostreed-transaction-types.h"
 #include "rpmostree-dbus-helpers.h"
 #include "rpmostree-util.h"
 #include "rpmostree-core.h"
@@ -289,7 +290,20 @@ print_daemon_state (RPMOSTreeSysroot *sysroot_proxy,
 
   rpmostreecxx::journal_print_staging_failure ();
 
-  if (g_str_equal (policy, "none"))
+  g_autofree char *update_driver_sd_unit = NULL;
+  g_autofree char *update_driver_name = NULL;
+  if (!get_driver_info (&update_driver_name, &update_driver_sd_unit, error))
+    return FALSE;
+
+  if (update_driver_name && update_driver_sd_unit)
+    {
+      if (opt_verbose)
+        g_print ("AutomaticUpdates: driven by %s (%s)\n", 
+                 update_driver_name, update_driver_sd_unit);
+      else
+        g_print ("AutomaticUpdates: driven by %s\n", update_driver_name);
+    }
+  else if (g_str_equal (policy, "none"))
     {
       /* https://github.com/coreos/fedora-coreos-tracker/issues/271
        * https://github.com/coreos/rpm-ostree/issues/1747
@@ -1061,6 +1075,9 @@ rpmostree_builtin_status (int             argc,
   g_autoptr(GVariant) cached_update = NULL;
   if (rpmostree_os_get_has_cached_update_rpm_diff (os_proxy))
     cached_update = rpmostree_os_dup_cached_update (os_proxy);
+  g_autoptr(GVariant) driver_g_variant;
+  if (!get_driver_g_variant (&driver_g_variant, error))
+    return FALSE;
 
   if (opt_json || opt_jsonpath)
     {
@@ -1081,6 +1098,10 @@ rpmostree_builtin_status (int             argc,
       else
         cached_update_node = json_node_new (JSON_NODE_NULL);
       json_builder_add_value (builder, cached_update_node);
+      json_builder_set_member_name (builder, "update-driver");
+      JsonNode *update_driver_node =
+        driver_g_variant ? json_gvariant_serialize (driver_g_variant) : json_node_new (JSON_NODE_NULL);
+      json_builder_add_value (builder, update_driver_node);
       json_builder_end_object (builder);
 
       JsonNode *json_root = json_builder_get_root (builder);

src/daemon/rpmostreed-transaction.h

@@ -49,7 +49,7 @@ gboolean        rpmostreed_transaction_get_active          (RpmostreedTransactio
 OstreeSysroot * rpmostreed_transaction_get_sysroot         (RpmostreedTransaction *transaction);
 const char *    rpmostreed_transaction_get_client          (RpmostreedTransaction *transaction);
 const char *    rpmostreed_transaction_get_agent_id        (RpmostreedTransaction *transaction);
-const char *    rpmostreed_transaction_get_sd_unit        (RpmostreedTransaction *transaction);
+const char *    rpmostreed_transaction_get_sd_unit         (RpmostreedTransaction *transaction);
 GDBusMethodInvocation *
                 rpmostreed_transaction_get_invocation      (RpmostreedTransaction *transaction);
 const char *    rpmostreed_transaction_get_client_address  (RpmostreedTransaction *transaction);

tests/vmcheck/test-misc-2.sh

@@ -44,9 +44,12 @@ assert_streq "$(vm_get_booted_csum)" "${booted_csum}"
 vm_assert_journal_has_content $cursor 'Not finalizing; found /run/ostree/staged-deployment-locked'
 echo "ok locked rebase staging"
 
-# This also now tests custom client IDs in the journal
+# This also now tests custom client IDs in the journal and the `deploy --register-driver` option.
 cursor=$(vm_get_journal_cursor)
-vm_cmd env RPMOSTREE_CLIENT_ID=testing-agent-id rpm-ostree deploy revision="${commit}" --lock-finalization
+vm_cmd env RPMOSTREE_CLIENT_ID=testing-agent-id \
+       rpm-ostree deploy revision="${commit}" \
+       --lock-finalization --register-driver TestDriver
+vm_cmd test -f /run/rpm-ostree/update-driver.gv
 vm_cmd test -f /run/ostree/staged-deployment-locked
 if vm_rpmostree finalize-deployment; then
   assert_not_reached "finalized without expected checksum"
@@ -57,6 +60,12 @@ vm_cmd journalctl --after-cursor "'$cursor'" -u rpm-ostreed -o json | jq -r '.AG
 assert_file_has_content agent.txt testing-agent-id
 vm_cmd journalctl --after-cursor "'$cursor'" -u rpm-ostreed -o json | jq -r '.AGENT_SD_UNIT//""' > agent_sd_unit.txt
 assert_file_has_content agent_sd_unit.txt sshd.service
+vm_cmd rpm-ostree status > status.txt
+assert_file_has_content status.txt 'driven by TestDriver'
+vm_cmd rpm-ostree status -v > verbose_status.txt
+assert_file_has_content verbose_status.txt 'driven by TestDriver (sshd.service)'
+vm_assert_status_jq ".\"update-driver\"[\"driver-name\"] == \"TestDriver\"" \
+                    ".\"update-driver\"[\"driver-sd-unit\"] == \"sshd.service\""
 vm_reboot_cmd rpm-ostree finalize-deployment "${commit}"
 assert_streq "$(vm_get_booted_csum)" "${commit}"
 vm_assert_journal_has_content $cursor "Finalized deployment; rebooting into ${commit}"