[tracker/wip/sam/resource: 18/18] tracker-extract: Allow Turtle serialization

[Sam Thursfield <sthursfield src gnome org>]

commit 829addd229fb839b50c5963d85cdc8c48cb8f657
Author: Sam Thursfield <sam afuera me uk>
Date:   Sat Apr 9 17:12:27 2016 +0100

    tracker-extract: Allow Turtle serialization

 src/libtracker-common/tracker-enums.h |    1 +
 src/tracker-extract/tracker-extract.c |   20 ++++++++++++++++++++
 src/tracker-extract/tracker-main.c    |    2 +-
 3 files changed, 22 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-common/tracker-enums.h b/src/libtracker-common/tracker-enums.h
index edce490..5121a72 100644
--- a/src/libtracker-common/tracker-enums.h
+++ b/src/libtracker-common/tracker-enums.h
@@ -43,6 +43,7 @@ typedef enum {
        TRACKER_SERIALIZATION_FORMAT_JSON,
        TRACKER_SERIALIZATION_FORMAT_JSON_LD,
        TRACKER_SERIALIZATION_FORMAT_SPARQL,
+       TRACKER_SERIALIZATION_FORMAT_TURTLE,
 } TrackerSerializationFormat;
 
 G_END_DECLS
diff --git a/src/tracker-extract/tracker-extract.c b/src/tracker-extract/tracker-extract.c
index bb7a525..a253b83 100644
--- a/src/tracker-extract/tracker-extract.c
+++ b/src/tracker-extract/tracker-extract.c
@@ -824,6 +824,26 @@ tracker_extract_get_metadata_by_cmdline (TrackerExtract             *object,
                                text = tracker_sparql_builder_get_result (builder);
 
                                g_print ("%s\n", text);
+                       } else if (output_format == TRACKER_SERIALIZATION_FORMAT_TURTLE) {
+                               for (GList *l = resources; l; l = l->next) {
+                                       char *turtle;
+
+                                       /* If this was going into the tracker-store we'd generate a unique ID
+                                        * here, so that the data persisted across file renames.
+                                        */
+                                       tracker_resource_set_identifier (TRACKER_RESOURCE (l->data), uri);
+
+                                       turtle = tracker_resource_print_turtle (TRACKER_RESOURCE (l->data),
+                                                                               
tracker_namespace_manager_get_default ());
+
+                                       if (turtle) {
+                                               g_print ("%s\n", turtle);
+                                               g_free (turtle);
+                                       } else {
+                                               g_printerr ("%s\n", error->message);
+                                               g_error_free (error);
+                                       }
+                               }
                        } else {
                                /* FIXME: we should return a JSON-LD @graph if there are multiple resources,
                                 * not a sequence of JSON documents!!!
diff --git a/src/tracker-extract/tracker-main.c b/src/tracker-extract/tracker-main.c
index 0baf9cd..4e70b72 100644
--- a/src/tracker-extract/tracker-main.c
+++ b/src/tracker-extract/tracker-main.c
@@ -96,7 +96,7 @@ static GOptionEntry entries[] = {
          N_("Force a module to be used for extraction (e.g. \"foo\" for \"foo.so\")"),
          N_("MODULE") },
        { "output-format", 'o', 0, G_OPTION_ARG_STRING, &output_format_name,
-         N_("Output results format: 'json' or 'sparql'"),
+         N_("Output results format: 'json', 'sparql', or 'turtle'"),
          N_("FORMAT") },
        { "version", 'V', 0,
          G_OPTION_ARG_NONE, &version,