summaryrefslogtreecommitdiff
path: root/lib/libalpm
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libalpm')
-rw-r--r--lib/libalpm/deps.c104
1 files changed, 52 insertions, 52 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index c35a2752..ae5d60bc 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -551,44 +551,29 @@ error:
return NULL;
}
-/* These parameters are messy. We check if this package, given a list of
- * targets and a db is safe to remove. We do NOT remove it if it is in the
- * target list, or if the package was explicitly installed and
- * include_explicit == 0 */
-static int can_remove_package(alpm_db_t *db, alpm_pkg_t *pkg,
- alpm_list_t *targets, int include_explicit)
+/** Move package dependencies from one list to another
+ * @param from list to scan for dependencies
+ * @param to list to add dependencies to
+ * @param pkg package whose dependencies are moved
+ * @param explicit if 0, explicitly installed packages are not moved
+ */
+static void _alpm_select_depends(alpm_list_t **from, alpm_list_t **to,
+ alpm_pkg_t *pkg, int explicit)
{
- alpm_list_t *i;
-
- if(alpm_pkg_find(targets, pkg->name)) {
- return 0;
- }
-
- if(!include_explicit) {
- /* see if it was explicitly installed */
- if(alpm_pkg_get_reason(pkg) == ALPM_PKG_REASON_EXPLICIT) {
- _alpm_log(db->handle, ALPM_LOG_DEBUG,
- "excluding %s -- explicitly installed\n", pkg->name);
- return 0;
+ alpm_list_t *i, *next;
+ if(!alpm_pkg_get_depends(pkg)) {
+ return;
+ }
+ for(i = *from; i; i = next) {
+ alpm_pkg_t *deppkg = i->data;
+ next = i->next;
+ if((explicit || alpm_pkg_get_reason(deppkg) != ALPM_PKG_REASON_EXPLICIT)
+ && _alpm_pkg_depends_on(pkg, deppkg)) {
+ *to = alpm_list_add(*to, deppkg);
+ *from = alpm_list_remove_item(*from, i);
+ free(i);
}
}
-
- /* TODO: checkdeps could be used here, it handles multiple providers
- * better, but that also makes it slower.
- * Also this would require to first add the package to the targets list,
- * then call checkdeps with it, then remove the package from the targets list
- * if checkdeps detected it would break something */
-
- /* see if other packages need it */
- for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
- alpm_pkg_t *lpkg = i->data;
- if(_alpm_pkg_depends_on(lpkg, pkg) && !alpm_pkg_find(targets, lpkg->name)) {
- return 0;
- }
- }
-
- /* it's ok to remove */
- return 1;
}
/**
@@ -604,31 +589,46 @@ static int can_remove_package(alpm_db_t *db, alpm_pkg_t *pkg,
*/
int _alpm_recursedeps(alpm_db_t *db, alpm_list_t **targs, int include_explicit)
{
- alpm_list_t *i, *j;
+ alpm_list_t *i, *keep, *rem = NULL;
if(db == NULL || targs == NULL) {
return -1;
}
+ keep = alpm_list_copy(_alpm_db_get_pkgcache(db));
for(i = *targs; i; i = i->next) {
- alpm_pkg_t *pkg = i->data;
- for(j = _alpm_db_get_pkgcache(db); j; j = j->next) {
- alpm_pkg_t *deppkg = j->data;
- if(_alpm_pkg_depends_on(pkg, deppkg)
- && can_remove_package(db, deppkg, *targs, include_explicit)) {
- alpm_pkg_t *copy = NULL;
- _alpm_log(db->handle, ALPM_LOG_DEBUG, "adding '%s' to the targets\n",
- deppkg->name);
- /* add it to the target list */
- if(_alpm_pkg_dup(deppkg, &copy)) {
- /* we return memory on "non-fatal" error in _alpm_pkg_dup */
- _alpm_pkg_free(copy);
- return -1;
- }
- *targs = alpm_list_add(*targs, copy);
- }
+ keep = alpm_list_remove(keep, i->data, _alpm_pkg_cmp, NULL);
+ }
+
+ /* recursively select all dependencies for removal */
+ for(i = *targs; i; i = i->next) {
+ _alpm_select_depends(&keep, &rem, i->data, include_explicit);
+ }
+ for(i = rem; i; i = i->next) {
+ _alpm_select_depends(&keep, &rem, i->data, include_explicit);
+ }
+
+ /* recursively select any still needed packages to keep */
+ for(i = keep; i && rem; i = i->next) {
+ _alpm_select_depends(&rem, &keep, i->data, 1);
+ }
+ alpm_list_free(keep);
+
+ /* copy selected packages into the target list */
+ for(i = rem; i; i = i->next) {
+ alpm_pkg_t *pkg = i->data, *copy = NULL;
+ _alpm_log(db->handle, ALPM_LOG_DEBUG,
+ "adding '%s' to the targets\n", pkg->name);
+ if(_alpm_pkg_dup(pkg, &copy)) {
+ /* we return memory on "non-fatal" error in _alpm_pkg_dup */
+ _alpm_pkg_free(copy);
+ alpm_list_free(rem);
+ return -1;
}
+ *targs = alpm_list_add(*targs, copy);
}
+ alpm_list_free(rem);
+
return 0;
}