Handle sync target + ignore properly

Rather than say we can't find the target after saying "No, I guess I don't
want to install this", we should make sure the ignored status gets passed
all the way through. This fixes FS#19866.

Pactest is also included that failed before due to the fact that we normally
treat an unfound package as a reason to exit with a non-zero status.

Signed-off-by: Dan McGee <dan@archlinux.org>

lib/libalpm/sync.c

@@ -291,7 +291,11 @@ int _alpm_sync_target(alpm_list_t *dbs_sync, char *target)
 	}
 
 	if(!found) {
-		RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
+		/* pass through any 'found but ignored' errors */
+		if(pm_errno != PM_ERR_PKG_IGNORED) {
+			pm_errno = PM_ERR_PKG_NOT_FOUND;
+		}
+		return(-1);
 	}
 
 	return(0);

test/pacman/tests/ignore006.py

@@ -0,0 +1,10 @@
+self.description = "Sync with target in ignore list and say no"
+
+pkg = pmpkg("package1")
+self.addpkg2db("sync", pkg)
+
+self.option["IgnorePkg"] = ["package1"]
+self.args = "--ask=1 -S %s" % pkg.name
+
+self.addrule("PACMAN_RETCODE=0")
+self.addrule("!PKG_EXIST=package1")