[pacman-dev] Improving -Qi/-Si code

[Simon Gomizelj]

We actually do not need to maintain two tables. I've merged it with
pacman currently and I don't take that approach. I only did it with
alpm-dump because it was quicker to just dump out statically initialized
tables for testing. Was probably a poor choice for a demonstration.

I have a table building function instead, along the lines of:

    void build_table(char **table, alpm_pkgfrom_t from)
    {
        memset(table, 0, sizeof(char *) * LAST_ENTRY);

        table[ENTRY_REPOSITORY] = _("Repository");
        table[ENTRY_NAME] = _("Name");
        table[ENTRY_VERSION] = _("Version");
        table[ENTRY_DESCRIPTION] = _("Description");
        table[ENTRY_ARCHITECTURE] = _("Architecture");
        table[ENTRY_URL] = _("URL");
        // snip

        if(from == ALPM_PKG_FROM_SYNCDB || config->op_s_info > 1) {
            table[ENTRY_REQUIRED] = _("Required By");
            table[ENTRY_OPTIONAL_FOR] = _("Optional For");
        }

        // more branches
    }

So rather, the actual effective change, as far as design goes, is this
allows us to break dump_pkg_full into two discrete steps rather than all
at once; figure out what to print before you start printing.

In fact, all this table building stuff can entirely stay inside
package.c if we change dump_pkg_full to expect an alpm_list_t * instead
of a alpm_pkg_t *. It doesn't need to be exposed to sync.c/query.c (I
think, I'm not fully confident I've integrated the new system
everywhere).