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-rw-r--r--lib/libalpm/deps.c104
-rw-r--r--lib/libalpm/deps.h2
-rw-r--r--lib/libalpm/remove.c10
3 files changed, 56 insertions, 60 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index ddbd99a2..a2d60dd1 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -520,10 +520,12 @@ pmdepend_t SYMEXPORT *alpm_splitdep(const char *depstring)
return(depend);
}
-/* 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 */
-static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets)
+/* 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 if the package was explictly installed and
+ * include_explicit == 0 */
+static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets,
+ int include_explicit)
{
alpm_list_t *i;
@@ -531,13 +533,21 @@ static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets)
return(0);
}
- /* see if it was explicitly installed */
- if(alpm_pkg_get_reason(pkg) == PM_PKG_REASON_EXPLICIT) {
- _alpm_log(PM_LOG_DEBUG, "excluding %s -- explicitly installed",
- alpm_pkg_get_name(pkg));
- return(0);
+ if(!include_explicit) {
+ /* see if it was explicitly installed */
+ if(alpm_pkg_get_reason(pkg) == PM_PKG_REASON_EXPLICIT) {
+ _alpm_log(PM_LOG_DEBUG, "excluding %s -- explicitly installed",
+ alpm_pkg_get_name(pkg));
+ return(0);
+ }
}
+ /* 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_pkg_get_requiredby(pkg); i; i = i->next) {
pmpkg_t *reqpkg = _alpm_db_get_pkgfromcache(db, i->data);
@@ -550,69 +560,55 @@ static int can_remove_package(pmdb_t *db, pmpkg_t *pkg, alpm_list_t *targets)
return(1);
}
-/* return a new alpm_list_t target list containing all packages in the original
- * target list, as well as all their un-needed dependencies. By un-needed,
- * I mean dependencies that are *only* required for packages in the target
- * list, so they can be safely removed. This function is recursive.
+/**
+ * @brief Adds unneeded dependencies to an existing list of packages.
+ * By unneeded, we mean dependencies that are only required by packages in the
+ * target list, so they can be safely removed.
+ *
+ * @param db package database to do dependency tracing in
+ * @param *targs pointer to a list of packages
+ * @param include_explicit if 0, explicitly installed packages are not included
*/
-alpm_list_t *_alpm_removedeps(pmdb_t *db, alpm_list_t *targs)
+void _alpm_recursedeps(pmdb_t *db, alpm_list_t **targs, int include_explicit)
{
alpm_list_t *i, *j, *k;
- alpm_list_t *newtargs = targs;
ALPM_LOG_FUNC;
- if(db == NULL) {
- return(newtargs);
+ if(db == NULL || targs == NULL) {
+ return;
}
- for(i = targs; i; i = i->next) {
- pmpkg_t *pkg = i->data;
- for(j = alpm_pkg_get_depends(pkg); j; j = j->next) {
- pmdepend_t *depend = alpm_splitdep(j->data);
- pmpkg_t *deppkg;
- if(depend == NULL) {
- continue;
- }
-
- deppkg = _alpm_db_get_pkgfromcache(db, depend->name);
- if(deppkg == NULL) {
- /* package not found... look for a provision instead */
- alpm_list_t *provides = _alpm_db_whatprovides(db, depend->name);
- if(!provides) {
- /* Not found, that's fine, carry on */
- _alpm_log(PM_LOG_DEBUG, "cannot find package \"%s\" or anything that provides it!", depend->name);
+ /* TODO: the while loop should be removed if we can assume
+ * that alpm_list_add (or another function) adds to the end of the list,
+ * and that the target list is topo sorted (by _alpm_sortbydeps()).
+ */
+ int ready = 0;
+ while(!ready) {
+ ready = 1;
+ for(i = *targs; i; i = i->next) {
+ pmpkg_t *pkg = i->data;
+ for(j = alpm_pkg_get_depends(pkg); j; j = j->next) {
+ pmdepend_t *depend = alpm_splitdep(j->data);
+ if(depend == NULL) {
continue;
}
- for(k = provides; k; k = k->next) {
- pmpkg_t *provpkg = k->data;
- if(can_remove_package(db, provpkg, newtargs)) {
- pmpkg_t *pkg = _alpm_pkg_dup(provpkg);
-
+ for(k = _alpm_db_get_pkgcache(db); k; k = k->next) {
+ pmpkg_t *deppkg = k->data;
+ if(alpm_depcmp(deppkg,depend)
+ && can_remove_package(db, deppkg, *targs, include_explicit)) {
_alpm_log(PM_LOG_DEBUG, "adding '%s' to the targets",
- alpm_pkg_get_name(pkg));
+ alpm_pkg_get_name(deppkg));
/* add it to the target list */
- newtargs = alpm_list_add(newtargs, pkg);
- newtargs = _alpm_removedeps(db, newtargs);
+ *targs = alpm_list_add(*targs, _alpm_pkg_dup(deppkg));
+ ready = 0;
}
}
- alpm_list_free(provides);
- } else if(can_remove_package(db, deppkg, newtargs)) {
- pmpkg_t *pkg = _alpm_pkg_dup(deppkg);
-
- _alpm_log(PM_LOG_DEBUG, "adding '%s' to the targets",
- alpm_pkg_get_name(pkg));
-
- /* add it to the target list */
- newtargs = alpm_list_add(newtargs, pkg);
- newtargs = _alpm_removedeps(db, newtargs);
+ free(depend);
}
- free(depend);
}
}
-
- return(newtargs);
}
/* populates *list with packages that need to be installed to satisfy all
diff --git a/lib/libalpm/deps.h b/lib/libalpm/deps.h
index 2edbb503..f11a19a0 100644
--- a/lib/libalpm/deps.h
+++ b/lib/libalpm/deps.h
@@ -58,7 +58,7 @@ int _alpm_depmiss_isin(pmdepmissing_t *needle, alpm_list_t *haystack);
alpm_list_t *_alpm_sortbydeps(alpm_list_t *targets, pmtranstype_t mode);
alpm_list_t *_alpm_checkdeps(pmdb_t *db, pmtranstype_t op,
alpm_list_t *packages);
-alpm_list_t *_alpm_removedeps(pmdb_t *db, alpm_list_t *targs);
+void _alpm_recursedeps(pmdb_t *db, alpm_list_t **targs, int include_explicit);
int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *syncpkg,
alpm_list_t *list, alpm_list_t *trail, pmtrans_t *trans,
alpm_list_t **data);
diff --git a/lib/libalpm/remove.c b/lib/libalpm/remove.c
index 5315d96c..2a080f85 100644
--- a/lib/libalpm/remove.c
+++ b/lib/libalpm/remove.c
@@ -135,11 +135,6 @@ int _alpm_remove_prepare(pmtrans_t *trans, pmdb_t *db, alpm_list_t **data)
}
}
- if(trans->flags & PM_TRANS_FLAG_RECURSE) {
- _alpm_log(PM_LOG_DEBUG, "finding removable dependencies");
- trans->packages = _alpm_removedeps(db, trans->packages);
- }
-
/* re-order w.r.t. dependencies */
_alpm_log(PM_LOG_DEBUG, "sorting by dependencies");
lp = _alpm_sortbydeps(trans->packages, PM_TRANS_TYPE_REMOVE);
@@ -147,6 +142,11 @@ int _alpm_remove_prepare(pmtrans_t *trans, pmdb_t *db, alpm_list_t **data)
alpm_list_free(trans->packages);
trans->packages = lp;
+ if(trans->flags & PM_TRANS_FLAG_RECURSE) {
+ _alpm_log(PM_LOG_DEBUG, "finding removable dependencies");
+ _alpm_recursedeps(db, &trans->packages, 0);
+ }
+
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_DONE, NULL, NULL);
return(0);
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2025-10-31 16:47:35 +0000