Maintain a list of seen packages when installing a group

As reported in FS#20221, we don't always do the right thing when installing
a group and using the --needed option. This was due to the code pulling
packages based on what was already in the transaction's add list, but
completely ignoring the fact that we may have already seen and skipped this
same package in an earlier repository.

Add a list to the private _alpm_sync_pkg() function that allows us to have
this extra information so we don't mistakenly downgrade a package when using
--needed.

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

1 files changed, 8 insertions, 4 deletions

diff --git a/lib/libalpm/sync.c b/lib/libalpm/sync.c
index 68ee8dc7..bc7c3dc2 100644
--- a/lib/libalpm/sync.c
+++ b/lib/libalpm/sync.c
@@ -202,7 +202,7 @@ int SYMEXPORT alpm_sync_sysupgrade(int enable_downgrade)
 	return(0);
 }
 
-int _alpm_sync_pkg(pmpkg_t *spkg)
+int _alpm_sync_pkg(pmpkg_t *spkg, alpm_list_t *pkg_list)
 {
 	pmtrans_t *trans;
 	pmdb_t *db_local;
@@ -213,7 +213,7 @@ int _alpm_sync_pkg(pmpkg_t *spkg)
 	trans = handle->trans;
 	db_local = handle->db_local;
 
-	if(_alpm_pkg_find(trans->add, alpm_pkg_get_name(spkg))) {
+	if(_alpm_pkg_find(pkg_list, alpm_pkg_get_name(spkg))) {
 		RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
 	}
 
@@ -251,6 +251,7 @@ int _alpm_sync_pkg(pmpkg_t *spkg)
 int _alpm_sync_target(alpm_list_t *dbs_sync, char *target)
 {
 	alpm_list_t *i, *j;
+	alpm_list_t *known_pkgs = NULL;
 	pmpkg_t *spkg;
 	pmdepend_t *dep; /* provisions and dependencies are also allowed */
 	pmgrp_t *grp;
@@ -267,7 +268,7 @@ int _alpm_sync_target(alpm_list_t *dbs_sync, char *target)
 	_alpm_dep_free(dep);
 
 	if(spkg != NULL) {
-		return(_alpm_sync_pkg(spkg));
+		return(_alpm_sync_pkg(spkg, handle->trans->add));
 	}
 
 	_alpm_log(PM_LOG_DEBUG, "%s package not found, searching for group...\n", target);
@@ -278,17 +279,20 @@ int _alpm_sync_target(alpm_list_t *dbs_sync, char *target)
 			found = 1;
 			for(j = alpm_grp_get_pkgs(grp); j; j = j->next) {
 				pmpkg_t *pkg = j->data;
-				if(_alpm_sync_pkg(pkg) == -1) {
+				if(_alpm_sync_pkg(pkg, known_pkgs) == -1) {
 					if(pm_errno == PM_ERR_TRANS_DUP_TARGET || pm_errno == PM_ERR_PKG_IGNORED) {
 						/* just skip duplicate or ignored targets */
 						continue;
 					} else {
+						alpm_list_free(known_pkgs);
 						return(-1);
 					}
 				}
+				known_pkgs = alpm_list_add(known_pkgs, pkg);
 			}
 		}
 	}
+	alpm_list_free(known_pkgs);
 
 	if(!found) {
 		/* pass through any 'found but ignored' errors */