rpm/rpmsort_reverse.diff

--- tools/rpmsort.c.orig	2023-10-11 11:38:36.639686209 +0000
+++ tools/rpmsort.c	2023-10-11 12:01:36.112837741 +0000
@@ -119,6 +119,11 @@ exit:
     return vercmpflag;
 }
 
+static int package_version_compare_reverse(const void *p, const void *q)
+{
+    return -package_version_compare(p, q);
+}
+
 static void add_input(const char *filename, char ***package_names,
 		      size_t *n_package_names)
 {
@@ -169,7 +174,13 @@ static void add_input(const char *filena
     *n_package_names = n_names;
 }
 
-static struct poptOption optionsTable[] = { POPT_AUTOHELP POPT_TABLEEND };
+static int reverse = 0;
+
+static struct poptOption optionsTable[] = {
+    { "reverse", 'r', POPT_ARG_VAL, &reverse, 1,
+	N_("reverse the result of comparisons"), NULL },
+    POPT_AUTOHELP POPT_TABLEEND
+};
 
 int main(int argc, const char *argv[])
 {
@@ -181,7 +192,7 @@ int main(int argc, const char *argv[])
 
     optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
     poptSetOtherOptionHelp(optCon, "<FILES>");
-    if (poptGetNextOpt(optCon) == 0) {
+    if (poptGetNextOpt(optCon) != -1) {
 	poptPrintUsage(optCon, stderr, 0);
 	exit(EXIT_FAILURE);
     }
@@ -201,7 +212,8 @@ int main(int argc, const char *argv[])
     }
 
     qsort(package_names, n_package_names, sizeof(char *),
-	  package_version_compare);
+	  reverse ? package_version_compare_reverse
+		: package_version_compare);
 
     /* Send sorted list to stdout. */
     for (int i = 0; i < n_package_names; i++) {