[gnome-software] Allow gnome-software-cmd to install and remove software

[Richard Hughes <rhughes src gnome org>]

commit b2f0a4e106ecb91c357d80314565bc38d54567e5
Author: Richard Hughes <richard hughsie com>
Date:   Wed Jun 14 17:09:27 2017 +0100

    Allow gnome-software-cmd to install and remove software
    
    This can be done using:
    
        gnome-software-cmd action install feedreader
        gnome-software-cmd action remove feedreader

 lib/gs-cmd.c |  115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 115 insertions(+), 0 deletions(-)
---
diff --git a/lib/gs-cmd.c b/lib/gs-cmd.c
index 23b8025..42da45b 100644
--- a/lib/gs-cmd.c
+++ b/lib/gs-cmd.c
@@ -179,6 +179,109 @@ gs_cmd_parse_refine_flags (const gchar *extra, GError **error)
        return refine_flags;
 }
 
+static guint
+gs_cmd_prompt_for_number (guint maxnum)
+{
+       gint retval;
+       guint answer = 0;
+
+       do {
+               char buffer[64];
+
+               /* swallow the \n at end of line too */
+               if (!fgets (buffer, sizeof (buffer), stdin))
+                       break;
+               if (strlen (buffer) == sizeof (buffer) - 1)
+                       continue;
+
+               /* get a number */
+               retval = sscanf (buffer, "%u", &answer);
+
+               /* positive */
+               if (retval == 1 && answer > 0 && answer <= maxnum)
+                       break;
+
+               /* TRANSLATORS: the user isn't reading the question */
+               g_print (_("Please enter a number from 1 to %u: "), maxnum);
+       } while (TRUE);
+       return answer;
+}
+
+static gboolean
+gs_cmd_action_exec (GsCmdSelf *self, GsPluginAction action, const gchar *name, GError **error)
+{
+       g_autoptr(GsApp) app = NULL;
+       g_autoptr(GsAppList) list = NULL;
+       g_autoptr(GsAppList) list_filtered = NULL;
+       g_autoptr(GsPluginJob) plugin_job2 = NULL;
+       g_autoptr(GsPluginJob) plugin_job = NULL;
+       gboolean show_installed = TRUE;
+
+       /* ensure set */
+       self->refine_flags |= GS_PLUGIN_REFINE_FLAGS_REQUIRE_ICON;
+       self->refine_flags |= GS_PLUGIN_REFINE_FLAGS_REQUIRE_SETUP_ACTION;
+
+       /* do search */
+       plugin_job = gs_plugin_job_newv (GS_PLUGIN_ACTION_SEARCH,
+                                        "search", name,
+                                        "refine-flags", self->refine_flags,
+                                        "max-results", self->max_results,
+                                        NULL);
+       list = gs_plugin_loader_job_process (self->plugin_loader, plugin_job, NULL, error);
+       if (list == NULL)
+               return FALSE;
+       if (gs_app_list_length (list) == 0) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "no components matched '%s'",
+                            name);
+               return FALSE;
+       }
+
+       /* filter */
+       if (action == GS_PLUGIN_ACTION_INSTALL)
+               show_installed = FALSE;
+       list_filtered = gs_app_list_new ();
+       for (guint i = 0; i < gs_app_list_length (list); i++) {
+               GsApp *app_tmp = gs_app_list_index (list, i);
+               if (gs_app_is_installed (app_tmp) == show_installed)
+                       gs_app_list_add (list_filtered, app_tmp);
+       }
+
+       /* nothing */
+       if (gs_app_list_length (list_filtered) == 0) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "no components were in the correct state for '%s %s'",
+                            gs_plugin_action_to_string (action), name);
+               return FALSE;
+       }
+
+       /* get one GsApp */
+       if (gs_app_list_length (list_filtered) == 1) {
+               app = g_object_ref (gs_app_list_index (list_filtered, 0));
+       } else {
+               guint idx;
+               /* TRANSLATORS: asking the user to choose an app from a list */
+               g_print ("%s\n", _("Choose an application:"));
+               for (guint i = 0; i < gs_app_list_length (list_filtered); i++) {
+                       GsApp *app_tmp = gs_app_list_index (list_filtered, i);
+                       g_print ("%u.\t%s\n",
+                                i + 1,
+                                gs_app_get_unique_id (app_tmp));
+               }
+               idx = gs_cmd_prompt_for_number (gs_app_list_length (list_filtered));
+               app = g_object_ref (gs_app_list_index (list_filtered, idx - 1));
+       }
+
+       /* install */
+       plugin_job2 = gs_plugin_job_newv (action, "app", app, NULL);
+       return gs_plugin_loader_job_action (self->plugin_loader, plugin_job2,
+                                           NULL, error);
+}
+
 static GsPluginRefreshFlags
 gs_cmd_refresh_flag_from_string (const gchar *flag)
 {
@@ -355,6 +458,17 @@ main (int argc, char **argv)
                                break;
                        }
                }
+       } else if (argc == 4 && g_strcmp0 (argv[1], "action") == 0) {
+               GsPluginAction action = gs_plugin_action_from_string (argv[2]);
+               if (action == GS_PLUGIN_ACTION_UNKNOWN) {
+                       ret = FALSE;
+                       g_set_error (&error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    "Did not recognise action '%s'", argv[2]);
+               } else {
+                       ret = gs_cmd_action_exec (self, action, argv[3], &error);
+               }
        } else if (argc == 3 && g_strcmp0 (argv[1], "action-upgrade-download") == 0) {
                g_autoptr(GsPluginJob) plugin_job = NULL;
                app = gs_app_new (argv[2]);
@@ -579,6 +693,7 @@ main (int argc, char **argv)
                                     "Did not recognise option, use 'installed', "
                                     "'updates', 'popular', 'get-categories', "
                                     "'get-category-apps', 'filename-to-app', "
+                                    "'action install', 'action remove', "
                                     "'sources', 'refresh', 'launch' or 'search'");
        }
        if (!ret) {