v.external: dsn/layer required, check overwrite

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@45184 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.external/args.c

@@ -12,38 +12,41 @@ void parse_args(int argc, char **argv,
     options->dsn->key = "dsn";
     options->dsn->type = TYPE_STRING;
     options->dsn->gisprompt = "old_file,file,dsn";
-    options->dsn->label = _("OGR data source name");
+    options->dsn->label = _("Name of input OGR data source");
     options->dsn->description = _("Examples:\n"
-				  "\t\tESRI Shapefile: directory containing shapefiles\n"
-				  "\t\tMapInfo File: directory containing mapinfo files\n"
-				  "\t\tPostGIS database: \"PG:dbname=<database>\"");
-    options->dsn->guisection = _("Data source");
+				  "\t\tESRI Shapefile: directory containing a shapefile\n"
+				  "\t\tMapInfo File: directory containing a mapinfo file\n"
+				  "\t\tPostGIS database: PG:dbname=<database>");
+    options->dsn->required = YES;
 
     options->layer = G_define_option();
     options->layer->key = "layer";
     options->layer->type = TYPE_STRING;
     options->layer->required = NO;
     options->layer->multiple = NO;
-    options->layer->label = _("OGR layer name");
+    options->layer->label = _("Name of input OGR layer");
     options->layer->description = _("Examples:\n"
 				    "\t\tESRI Shapefile: shapefile name\n"
 				    "\t\tMapInfo File: mapinfo file name\n"
 				    "\t\tPostGIS database: table name");
-    options->layer->guisection = _("Data source");
+    options->layer->required = YES;
+    options->layer->key_desc = "name";
     
     options->output = G_define_standard_option(G_OPT_V_OUTPUT);
     options->output->required = NO;
-    options->output->description = _("Name for GRASS vector map");
+    options->output->description = _("Name for output GRASS vector map");
 
     flags->format = G_define_flag();
     flags->format->key = 'f';
     flags->format->description = _("List supported OGR formats and exit");
     flags->format->guisection = _("Print");
+    flags->format->suppress_required = YES;
 
     flags->layer = G_define_flag();
     flags->layer->key = 'l';
-    flags->layer->description = _("List available OGR layers in dsn and exit");
+    flags->layer->description = _("List available OGR layers in given data source and exit");
     flags->layer->guisection = _("Print");
+    flags->layer->suppress_required = YES;
 
     flags->topo = G_define_flag();
     flags->topo->key = 'b';

vector/v.external/main.c

@@ -8,7 +8,7 @@
  *               
  * PURPOSE:      Create a new vector as a link to OGR layer (read-only)
  *               
- * COPYRIGHT:    (C) 2003-2010 by the GRASS Development Team
+ * COPYRIGHT:    (C) 2003-2011 by the GRASS Development Team
  *
  *               This program is free software under the 
  *               GNU General Public License (>=v2). 
@@ -40,7 +40,8 @@ int main(int argc, char *argv[])
     
     int ilayer, is3D;
     char buf[GPATH_MAX];
-     
+    const char *output;
+    
     G_gisinit(argv[0]);
     
     module = G_define_module();
@@ -68,12 +69,10 @@ int main(int argc, char *argv[])
     }
 
     if (!options.output->answer)
-	G_fatal_error(_("Required parameter <%s> not set"), options.output->key);
+	output = options.layer->answer;
+    else
+	output = options.output->answer;
     
-    if (!options.layer->answer)
-	G_fatal_error(_("Required parameter <%s> not set"), options.layer->key);
-        
-
     ilayer = list_layers(NULL, options.dsn->answer, options.layer->answer, &is3D);
     if (ilayer == -1) {
 	G_fatal_error(_("Layer <%s> not available"), options.layer->answer);
@@ -81,24 +80,29 @@ int main(int argc, char *argv[])
     
     G_debug(2, "layer '%s' was found", options.layer->answer);
 
-    Vect_open_new(&Map, options.output->answer, is3D);
+    if (G_find_vector2(output, G_mapset()) && !G_check_overwrite(argc, argv)) {
+	G_fatal_error(_("option <%s>: <%s> exists."),
+		      options.output->key, output);
+    }
+    
+    Vect_open_new(&Map, output, is3D);
     Vect_hist_command(&Map);
     Vect_close(&Map);
     
     /* Vect_open_new created 'head', 'coor', 'hist' -> delete 'coor' and create 'frmt' */
     sprintf(buf, "%s/%s/vector/%s/coor", G_location_path(), G_mapset(),
-	    options.output->answer);
+	    output);
     G_debug(2, "Delete '%s'", buf);
     if (unlink(buf) == -1) {
-	Vect_delete(options.output->answer);
+	Vect_delete(output);
 	G_fatal_error(_("Unable to delete '%s'"), buf);
     }
 
     /* Create frmt */
-    sprintf(buf, "%s/%s", GV_DIRECTORY, options.output->answer);
+    sprintf(buf, "%s/%s", GV_DIRECTORY, output);
     fd = G_fopen_new(buf, GV_FRMT_ELEMENT);
     if (fd == NULL) {
-	Vect_delete(options.output->answer);
+	Vect_delete(output);
 	G_fatal_error("Unable to open file '%s'", buf);
     }
     
@@ -109,12 +113,12 @@ int main(int argc, char *argv[])
     fclose(fd);
     
     if (!flags.topo->answer) {
-      Vect_open_old(&Map, options.output->answer, G_mapset());
+      Vect_open_old(&Map, output, G_mapset());
       Vect_build(&Map);
       Vect_close(&Map);
     }
 
-    G_done_msg(_("Link to vector map <%s> created."), options.output->answer);
+    G_done_msg(_("Link to vector map <%s> created."), output);
 
     exit(EXIT_SUCCESS);
 }