Function walk_dir

src/discover/discover.c:723–768

enum { GI_OWNED_CAP = 64 };

static void walk_dir(const char *dir_path, const char *rel_prefix, const cbm_discover_opts_t *opts,
                     const cbm_gitignore_t *gitignore, const cbm_gitignore_t *global_gi,
                     const cbm_gitignore_t *cbmignore, file_list_t *out) {
    walk_frame_t *stack = calloc(WALK_STACK_CAP, sizeof(walk_frame_t));
    if (!stack) {
        return;
    }
    /* Collect all owned gitignores — freed at the end because child frames
     * on the stack hold borrowed pointers to them. */
    cbm_gitignore_t *owned_gis[GI_OWNED_CAP];
    int owned_count = 0;

    int top = 0;
    snprintf(stack[top].dir, CBM_SZ_4K, "%s", dir_path);
    snprintf(stack[top].prefix, CBM_SZ_4K, "%s", rel_prefix);
    top++;

    while (top > 0) {
        walk_frame_t frame = stack[--top];

        cbm_gitignore_t *loaded = try_load_nested_gitignore(&frame);
        if (loaded) {
            frame.local_gi = loaded;
            snprintf(frame.local_gi_prefix, sizeof(frame.local_gi_prefix), "%s", frame.prefix);
            if (owned_count < GI_OWNED_CAP) {
                owned_gis[owned_count++] = loaded;
            }
        }

        cbm_dir_t *d = cbm_opendir(frame.dir);
        if (!d) {
            continue;
        }

        cbm_dirent_t *entry;
        while ((entry = cbm_readdir(d)) != NULL) {
            walk_dir_process_entry(entry, &frame, opts, gitignore, global_gi, cbmignore, stack,
                                   &top, out);
        }
        cbm_closedir(d);
    }
    for (int i = 0; i < owned_count; i++) {
        cbm_gitignore_free(owned_gis[i]);
    }
    free(stack);
}

/* ── Public API ───────────────────────────────── */