pacman : smarter optdepends handling.

During an upgrade, only the new optdepends will be displayed, to only keep
the useful information and not clutter pacman output too much.

The whole optdepends list is always available with -Si / -Qi.

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

src/pacman/callback.c

@@ -203,7 +203,7 @@ void cb_trans_evt(pmtransevt_t event, void *data1, void *data2)
 			         (char *)alpm_pkg_get_name(data1),
 			         (char *)alpm_pkg_get_version(data2),
 			         (char *)alpm_pkg_get_version(data1));
-			display_optdepends(data1);
+			display_new_optdepends(data2,data1);
 			break;
 		case PM_TRANS_EVT_INTEGRITY_START:
 			printf(_("checking package integrity...\n"));

src/pacman/util.c

@@ -609,6 +609,25 @@ void display_synctargets(const alpm_list_t *syncpkgs)
 	alpm_list_free(rpkglist);
 }
 
+/* Helper function for comparing strings using the
+ * alpm "compare func" signature */
+int str_cmp(const void *s1, const void *s2)
+{
+	return(strcmp(s1, s2));
+}
+
+void display_new_optdepends(pmpkg_t *oldpkg, pmpkg_t *newpkg)
+{
+	alpm_list_t *old = alpm_pkg_get_optdepends(oldpkg);
+	alpm_list_t *new = alpm_pkg_get_optdepends(newpkg);
+	alpm_list_t *optdeps = alpm_list_diff(new,old,str_cmp);
+	if(optdeps) {
+		printf(_("New optional dependencies for %s\n"), alpm_pkg_get_name(newpkg));
+		list_display_linebreak("   ", optdeps);
+	}
+	alpm_list_free(optdeps);
+}
+
 void display_optdepends(pmpkg_t *pkg)
 {
 	alpm_list_t *optdeps = alpm_pkg_get_optdepends(pkg);

src/pacman/util.h

@@ -54,6 +54,7 @@ void list_display(const char *title, const alpm_list_t *list);
 void list_display_linebreak(const char *title, const alpm_list_t *list);
 void display_targets(const alpm_list_t *pkgs, int install);
 void display_synctargets(const alpm_list_t *syncpkgs);
+void display_new_optdepends(pmpkg_t *oldpkg, pmpkg_t *newpkg);
 void display_optdepends(pmpkg_t *pkg);
 int yesno(char *fmt, ...);
 int noyes(char *fmt, ...);