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-rw-r--r--lib/libalpm/deps.c104
1 files changed, 73 insertions, 31 deletions
diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index c667daa2..694e5be5 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -229,13 +229,13 @@ alpm_list_t SYMEXPORT *alpm_deptest(pmdb_t *db, alpm_list_t *targets)
/** Checks dependencies and returns missing ones in a list.
* Dependencies can include versions with depmod operators.
- * @param db pointer to the local package database
+ * @param pkglist the list of local packages
* @param reversedeps handles the backward dependencies
* @param remove an alpm_list_t* of packages to be removed
* @param upgrade an alpm_list_t* of packages to be upgraded (remove-then-upgrade)
* @return an alpm_list_t* of pmpkg_t* of missing_t pointers.
*/
-alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
+alpm_list_t SYMEXPORT *alpm_checkdeps(alpm_list_t *pkglist, int reversedeps,
alpm_list_t *remove, alpm_list_t *upgrade)
{
alpm_list_t *i, *j;
@@ -245,12 +245,8 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
ALPM_LOG_FUNC;
- if(db == NULL) {
- return(NULL);
- }
-
targets = alpm_list_join(alpm_list_copy(remove), alpm_list_copy(upgrade));
- for(i = _alpm_db_get_pkgcache(db); i; i = i->next) {
+ for(i = pkglist; i; i = i->next) {
void *pkg = i->data;
if(alpm_list_find(targets, pkg, _alpm_pkg_cmp)) {
modified = alpm_list_add(modified, pkg);
@@ -273,7 +269,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
if(!_alpm_find_dep_satisfier(upgrade, depend) &&
!_alpm_find_dep_satisfier(dblist, depend)) {
/* Unsatisfied dependency in the upgrade list */
- char *missdepstring = alpm_dep_get_string(depend);
+ char *missdepstring = alpm_dep_compute_string(depend);
_alpm_log(PM_LOG_DEBUG, "checkdeps: missing dependency '%s' for package '%s'\n",
missdepstring, alpm_pkg_get_name(tp));
free(missdepstring);
@@ -297,7 +293,7 @@ alpm_list_t SYMEXPORT *alpm_checkdeps(pmdb_t *db, int reversedeps,
if(causingpkg &&
!_alpm_find_dep_satisfier(upgrade, depend) &&
!_alpm_find_dep_satisfier(dblist, depend)) {
- char *missdepstring = alpm_dep_get_string(depend);
+ char *missdepstring = alpm_dep_compute_string(depend);
_alpm_log(PM_LOG_DEBUG, "checkdeps: transaction would break '%s' dependency of '%s'\n",
missdepstring, alpm_pkg_get_name(lp));
free(missdepstring);
@@ -508,8 +504,20 @@ void _alpm_recursedeps(pmdb_t *db, alpm_list_t *targs, int include_explicit)
}
}
-/* helper function for resolvedeps: search for dep satisfier in dbs */
-pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs, alpm_list_t *excluding, pmpkg_t *tpkg)
+/**
+ * helper function for resolvedeps: search for dep satisfier in dbs
+ *
+ * @param dep is the dependency to search for
+ * @param dbs are the databases to search
+ * @param excluding are the packages to exclude from the search
+ * @param prompt if true, will cause an unresolvable dependency to issue an
+ * interactive prompt asking whether the package should be removed from
+ * the transaction or the transaction aborted; if false, simply returns
+ * an error code without prompting
+ * @return the resolved package
+ **/
+pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs,
+ alpm_list_t *excluding, int prompt)
{
alpm_list_t *i, *j;
/* 1. literals */
@@ -517,9 +525,11 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs, alpm_list_t *exclud
pmpkg_t *pkg = _alpm_db_get_pkgfromcache(i->data, dep->name);
if(pkg && alpm_depcmp(pkg, dep) && !_alpm_pkg_find(excluding, pkg->name)) {
if(_alpm_pkg_should_ignore(pkg)) {
- int install;
- QUESTION(handle->trans, PM_TRANS_CONV_INSTALL_IGNOREPKG, pkg,
- tpkg, NULL, &install);
+ int install = 0;
+ if (prompt) {
+ QUESTION(handle->trans, PM_TRANS_CONV_INSTALL_IGNOREPKG, pkg,
+ NULL, NULL, &install);
+ }
if(!install) {
continue;
}
@@ -534,9 +544,11 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs, alpm_list_t *exclud
if(alpm_depcmp(pkg, dep) && strcmp(pkg->name, dep->name) &&
!_alpm_pkg_find(excluding, pkg->name)) {
if(_alpm_pkg_should_ignore(pkg)) {
- int install;
- QUESTION(handle->trans, PM_TRANS_CONV_INSTALL_IGNOREPKG, pkg,
- tpkg, NULL, &install);
+ int install = 0;
+ if (prompt) {
+ QUESTION(handle->trans, PM_TRANS_CONV_INSTALL_IGNOREPKG,
+ pkg, NULL, NULL, &install);
+ }
if(!install) {
continue;
}
@@ -550,17 +562,33 @@ pmpkg_t *_alpm_resolvedep(pmdepend_t *dep, alpm_list_t *dbs, alpm_list_t *exclud
return(NULL);
}
-/* populates list with packages that need to be installed to satisfy all
- * dependencies of packages in list
+/* Computes resolvable dependencies for a given package and adds that package
+ * and those resolvable dependencies to a list.
*
- * @param remove contains packages elected for removal
+ * @param local is the local database
+ * @param dbs_sync are the sync databases
+ * @param pkg is the package to resolve
+ * @param packages is a pointer to a list of packages which will be
+ * searched first for any dependency packages needed to complete the
+ * resolve, and to which will be added any [pkg] and all of its
+ * dependencies not already on the list
+ * @param remove is the set of packages which will be removed in this
+ * transaction
+ * @param data returns the dependency which could not be satisfied in the
+ * event of an error
+ * @return 0 on success, with [pkg] and all of its dependencies not already on
+ * the [*packages] list added to that list, or -1 on failure due to an
+ * unresolvable dependency, in which case the [*packages] list will be
+ * unmodified by this function
*/
-int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, alpm_list_t *list,
- alpm_list_t *remove, alpm_list_t **data)
+int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, pmpkg_t *pkg,
+ alpm_list_t **packages, alpm_list_t *remove,
+ alpm_list_t **data)
{
alpm_list_t *i, *j;
alpm_list_t *targ;
alpm_list_t *deps = NULL;
+ alpm_list_t *packages_copy;
ALPM_LOG_FUNC;
@@ -568,25 +596,36 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, alpm_list_t *list,
return(-1);
}
+ if(_alpm_pkg_find(*packages, pkg->name) != NULL) {
+ return(0);
+ }
+
+ /* Create a copy of the packages list, so that it can be restored
+ on error */
+ packages_copy = alpm_list_copy(*packages);
+ /* [pkg] has not already been resolved into the packages list, so put it
+ on that list */
+ *packages = alpm_list_add(*packages, pkg);
+
_alpm_log(PM_LOG_DEBUG, "started resolving dependencies\n");
- for(i = list; i; i = i->next) {
+ for(i = alpm_list_last(*packages); i; i = i->next) {
pmpkg_t *tpkg = i->data;
targ = alpm_list_add(NULL, tpkg);
- deps = alpm_checkdeps(local, 0, remove, targ);
+ deps = alpm_checkdeps(_alpm_db_get_pkgcache(local), 0, remove, targ);
alpm_list_free(targ);
for(j = deps; j; j = j->next) {
pmdepmissing_t *miss = j->data;
pmdepend_t *missdep = alpm_miss_get_dep(miss);
- /* check if one of the packages in list already satisfies this dependency */
- if(_alpm_find_dep_satisfier(list, missdep)) {
+ /* check if one of the packages in the [*packages] list already satisfies this dependency */
+ if(_alpm_find_dep_satisfier(*packages, missdep)) {
continue;
}
/* find a satisfier package in the given repositories */
- pmpkg_t *spkg = _alpm_resolvedep(missdep, dbs_sync, list, tpkg);
+ pmpkg_t *spkg = _alpm_resolvedep(missdep, dbs_sync, *packages, 0);
if(!spkg) {
pm_errno = PM_ERR_UNSATISFIED_DEPS;
- char *missdepstring = alpm_dep_get_string(missdep);
- _alpm_log(PM_LOG_ERROR, _("cannot resolve \"%s\", a dependency of \"%s\"\n"),
+ char *missdepstring = alpm_dep_compute_string(missdep);
+ _alpm_log(PM_LOG_WARNING, _("cannot resolve \"%s\", a dependency of \"%s\"\n"),
missdepstring, tpkg->name);
free(missdepstring);
if(data) {
@@ -596,18 +635,21 @@ int _alpm_resolvedeps(pmdb_t *local, alpm_list_t *dbs_sync, alpm_list_t *list,
*data = alpm_list_add(*data, missd);
}
}
+ alpm_list_free(*packages);
+ *packages = packages_copy;
alpm_list_free_inner(deps, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(deps);
return(-1);
} else {
_alpm_log(PM_LOG_DEBUG, "pulling dependency %s (needed by %s)\n",
alpm_pkg_get_name(spkg), alpm_pkg_get_name(tpkg));
- list = alpm_list_add(list, spkg);
+ *packages = alpm_list_add(*packages, spkg);
}
}
alpm_list_free_inner(deps, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(deps);
}
+ alpm_list_free(packages_copy);
_alpm_log(PM_LOG_DEBUG, "finished resolving dependencies\n");
return(0);
}
@@ -689,7 +731,7 @@ const char SYMEXPORT *alpm_dep_get_version(const pmdepend_t *dep)
* @param dep the depend to turn into a string
* @return a string-formatted dependency with operator if necessary
*/
-char SYMEXPORT *alpm_dep_get_string(const pmdepend_t *dep)
+char SYMEXPORT *alpm_dep_compute_string(const pmdepend_t *dep)
{
char *name, *opr, *ver, *str = NULL;
size_t len;
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-11 14:45:21 +0000