Add option --only-data-dir (-x)

Only use the dictionaries in data-dir, do not search in user and system directories

This makes testing much easier

CMakeLists.txt

@@ -144,6 +144,7 @@ if (BUILD_TESTS)
 
   add_sdcv_shell_test(t_list)
   add_sdcv_shell_test(t_use)
+  add_sdcv_shell_test(t_only_data_dir)
   add_sdcv_shell_test(t_synonyms)
   add_sdcv_shell_test(t_interactive)
   add_sdcv_shell_test(t_utf8output)

src/sdcv.cpp

@@ -78,6 +78,7 @@ int main(int argc, char *argv[]) try {
     gboolean utf8_output = FALSE;
     gboolean utf8_input = FALSE;
     glib::CharStr opt_data_dir;
+    gboolean only_data_dir = FALSE;
     gboolean colorize = FALSE;
 
     const GOptionEntry entries[] = {
@@ -97,6 +98,8 @@ int main(int argc, char *argv[]) try {
         { "data-dir", '2', 0, G_OPTION_ARG_STRING, get_addr(opt_data_dir),
           _("use this directory as path to stardict data directory"),
           _("path/to/dir") },
+        { "only-data-dir", 'x', 0, G_OPTION_ARG_NONE, &only_data_dir,
+          _("only use the dictionaries in data-dir, do not search in user and system directories"), nullptr },
         { "color", 'c', 0, G_OPTION_ARG_NONE, &colorize,
           _("colorize the output"), nullptr },
         {},
@@ -122,10 +125,12 @@ int main(int argc, char *argv[]) try {
     const gchar *stardict_data_dir = g_getenv("STARDICT_DATA_DIR");
     std::string data_dir;
     if (!opt_data_dir) {
+      if (!only_data_dir) {
         if (stardict_data_dir)
             data_dir = stardict_data_dir;
         else
             data_dir = "/usr/share/stardict/dic";
+      }
     } else {
         data_dir = get_impl(opt_data_dir);
     }
@@ -134,11 +139,10 @@ int main(int argc, char *argv[]) try {
     if (!homedir)
         homedir = g_get_home_dir();
 
-    const std::list<std::string> dicts_dir_list = {
-        std::string(homedir) + G_DIR_SEPARATOR + ".stardict" + G_DIR_SEPARATOR + "dic",
-        data_dir
-    };
-
+    std::list<std::string> dicts_dir_list;
+    if(!only_data_dir)
+      dicts_dir_list.push_back(std::string(homedir) + G_DIR_SEPARATOR + ".stardict" + G_DIR_SEPARATOR + "dic");
+    dicts_dir_list.push_back(data_dir);
     if (show_list_dicts) {
         list_dicts(dicts_dir_list);
         return EXIT_SUCCESS;

tests/t_only_data_dir

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+set -e
+
+SDCV="$1"
+TEST_DIR="$2"
+
+unset SDCV_PAGER
+unset STARDICT_DATA_DIR
+
+DICTS=$($SDCV -x -n -l --data-dir "$TEST_DIR" | tail -n +2 | wc -l)
+# the expected result:
+ACTUAL_DICTS=$(find "$TEST_DIR" -name "*.ifo" | wc -l)
+if [ $DICTS -ne $ACTUAL_DICTS ]; then
+   echo "number of dictionaries in $TEST_DIR should be $ACTUAL_DICTS but was $DICTS according to sdcv"
+   exit 1
+fi
+
+exit 0