Add a new reason field to pmconflict_t struct

Sometimes "foo conflicts with bar" information is not enough, see this
thread: http://bbs.archlinux.org/viewtopic.php?id=77647. That's why I added
a new reason field to our pmconflict_t struct that stores the packager-
defined conflict that induced the fact that package1 conflicts with
package2.

I modified the front-end (in callback.c, sync.c, upgrade.c) to print this
new information as well.

Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>

1 files changed, 9 insertions, 2 deletions

diff --git a/src/pacman/upgrade.c b/src/pacman/upgrade.c
index e7691185..91888fec 100644
--- a/src/pacman/upgrade.c
+++ b/src/pacman/upgrade.c
@@ -110,8 +110,15 @@ int pacman_upgrade(alpm_list_t *targets)
 			case PM_ERR_CONFLICTING_DEPS:
 				for(i = data; i; i = alpm_list_next(i)) {
 					pmconflict_t *conflict = alpm_list_getdata(i);
-					printf(_(":: %s: conflicts with %s\n"),
-						alpm_conflict_get_package1(conflict), alpm_conflict_get_package2(conflict));
+					const char *package1 = alpm_conflict_get_package1(conflict);
+					const char *package2 = alpm_conflict_get_package2(conflict);
+					const char *reason = alpm_conflict_get_reason(conflict);
+					/* only print reason if it contains new information */
+					if(!strcmp(package1, reason) || !strcmp(package2, reason)) {
+						printf(_(":: %s and %s are in conflict\n"), package1, package2);
+					} else {
+						printf(_(":: %s and %s are in conflict (%s)\n"), package1, package2, reason);
+					}
 				}
 				break;
 			case PM_ERR_FILE_CONFLICTS: