This change ensures that no multiple versions of the same pkg
are added to the transaction; if a new version of the same
package is being added as a dependency, compare stored
and current and use the greatest one.
This fixes the recent issue seen in the aarch64 builders, where
two versions of the same package were added to the transaction.
Added a new test case.
This fixes multiple use after frees, found with AddressSanitizers.
* xbps_package_register: the pkgdb dictionary is replaced with
the new one.
* xbps_pkgdb_update: here the pkgdb is externalized, freed and
internalized.
The funcs xbps_pkg_name() and xbps_pkgpattern_name() were
using malloc(3) to return the result, until now.
They now have been changed to not allocate the result
via malloc, the caller is responsible to provide a buffer
at least of XBPS_NAME_SIZE (64).
If for whatever reason the pkgname can't be guessed,
returns false. This should avoid lots of small allocs
around libxbps.
New functions have the following prototype:
bool xbps_pkg_name(char *dst, size_t len, const char *pkg)
bool xbps_pkgpattern_name(char *dst, size_t len, const char *pkg)
as suggested by @duncaen.