nemo actions: Implement reverse dependencies.

This allows an action's visiblity to be conditional on a program *not* being found.
linuxmint · Apr 2, 2021 · 7fe8363 · 7fe8363
1 parent d5e3a3b
commit 7fe8363
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Showing 2 changed files with 28 additions and 8 deletions.
diff --git a/files/usr/share/nemo/actions/sample.nemo_action b/files/usr/share/nemo/actions/sample.nemo_action
@@ -80,7 +80,10 @@ Extensions=any;
 # You can also supply an absolute path to a file (i.e. /usr/lib/gvfs/gvfsd-archive) to check
 # instead of or in addition to an executable in the path.
 # This is an array, separate entries with semi-colon, and terminate with a semicolon.
-#Dependencies=gedit;
+#
+# v3.0: Reverse dependencies: Prefixing a program with '!' will reverse the logic - if
+# the program exists, the check will FAIL.
+#Dependencies=xed;!gedit;
 
 # Conditions - semicolon-separated array of special conditions:
 #     "desktop" current (parent) folder is desktop

diff --git a/libnemo-private/nemo-action.c b/libnemo-private/nemo-action.c
@@ -925,20 +925,37 @@ nemo_action_new (const gchar *name,
     if (deps != NULL) {
         guint i = 0;
         for (i = 0; i < g_strv_length (deps); i++) {
-            if (g_path_is_absolute (deps[i])) {
-                if (!g_file_test (deps[i], G_FILE_TEST_EXISTS)) {
+            gboolean reverse, found;
+
+            reverse = g_str_has_prefix (deps[i], "!");
+            found = FALSE;
+
+            const gchar *prg_name = reverse ? deps[i] + 1 : deps[i];
+
+            if (g_path_is_absolute (prg_name)) {
+                if (g_file_test (prg_name, G_FILE_TEST_EXISTS)) {
+                    found = TRUE;
+                }
+            } else {
+                gchar *p = g_find_program_in_path (prg_name);
+                if (p != NULL) {
+                    found = TRUE;
+                    g_free (p);
+                }
+            }
+
+            if (reverse) {
+                if (found) {
                     finish = FALSE;
-                    DEBUG ("Missing action dependency: %s", deps[i]);
+                    DEBUG ("Missing action reverse dependency: %s", deps[i]);
+                    break;
                 }
             } else {
-                gchar *p = g_find_program_in_path (deps[i]);
-                if (p == NULL) {
+                if (!found) {
                     finish = FALSE;
                     DEBUG ("Missing action dependency: %s", deps[i]);
-                    g_free (p);
                     break;
                 }
-                g_free (p);
             }
         }
     }