Search for packages to upgrade and add them to the transaction. @param handle the context handle @param enable_downgrade allow downgrading of packages if the remote version is lower @return 0 on success, -1 on error (pm_errno is set accordingly)
See Implementation
Search for packages to upgrade and add them to the transaction. @param handle the context handle @param enable_downgrade allow downgrading of packages if the remote version is lower @return 0 on success, -1 on error (pm_errno is set accordingly)