To build from filepath, relative to pages_dir

def _build_page(self, filepath):
        """ To build from filepath, relative to pages_dir """
        filename = filepath.split("/")[-1]
        # If filename starts with _ (underscore) or . (dot) do not build
        if not filename.startswith(("_", ".")) and (filename.endswith(PAGE_FORMAT)):
            meta = self._get_page_meta(filepath)
            content = self._get_page_content(filepath)

            # The default context for the page
            _default_page = {
                "build_dir": self.build_dir,
                "filepath": meta["filepath"],
                "context": {"page": meta},
                "content": content,
                "markup": meta.get("markup"),
                "template": meta.get("template"),
                "layout": meta.get("layout") or self.default_layout
            }

            # GENERATOR
            # Allows to generate
            _generator = meta.get("_generator")
            if _generator:
                data = self._data.get(_generator.get("data_source"))

                # We want these back in meta in they exists in the data
                special_meta = ["title", "slug", "description"]

                # SINGLE
                if _generator.get("type") == "single":
                    for d in data:
                        dmeta = copy.deepcopy(meta)
                        page = copy.deepcopy(_default_page)
                        for _ in special_meta:
                            if _ in d:
                                dmeta[_] = d.get(_)

                        # If generator has the slug, it will substitute if
                        # Slug in the generator must have token from the data
                        # to generate the slug
                        if "slug" in _generator:
                            dmeta["slug"] = _generator.get("slug").format(**d)

                        # Slug is required
                        if "slug" not in dmeta:
                            print("WARNING: Skipping page because it's missing `slug`")
                            continue
                        slug = dmeta.get("slug")
                        dmeta["url"] = slug
                        dmeta["context"] = d

                        page.update({
                            "filepath": slug,
                            "context": {"page": dmeta}
                        })
                        self.create_page(**page)

                if _generator.get("type") == "pagination":

                    per_page = int(_generator.get("per_page", self.site_config.get("pagination.per_page", 10)))
                    left_edge = int(_generator.get("left_edge", self.site_config.get("pagination.left_edge", 2)))
                    left_current = int(_generator.get("left_edge", self.site_config.get("pagination.left_current", 3)))
                    right_current = int(_generator.get("right_current", self.site_config.get("pagination.right_current", 4)))
                    right_edge = int(_generator.get("right_edge", self.site_config.get("pagination.right_edge", 2)))
                    padding = _generator.get("padding")
                    slug = _generator.get("slug")
                    limit = _generator.get("limit")

                    if "limit" in _generator:
                        data = data[:int(limit)]
                    data_chunks = utils.chunk_list(data, per_page)
                    len_data = len(data)

                    for i, d in enumerate(data_chunks):
                        dmeta = copy.deepcopy(meta)
                        page = copy.deepcopy(_default_page)

                        page_num = i + 1
                        _paginator = Paginator([],
                                               total=len_data,
                                               page=page_num,
                                               per_page=per_page,
                                               padding=padding,
                                               left_edge=left_edge,
                                               right_edge=right_edge,
                                               left_current=left_current,
                                               right_current=right_current)
                        _paginator.slug = slug
                        _paginator.index_slug = _generator.get("index_slug")

                        _slug = slug.format(**{"page_num": page_num})
                        dmeta["url"] = _slug
                        dmeta["context"] = d
                        dmeta["paginator"] = _paginator
                        page.update({
                            "filepath": _slug,
                            "context": {"page": dmeta}
                        })
                        self.create_page(**page)

                        # First page need to generate the index
                        if i == 0 and _generator.get("index_slug"):
                            page["filepath"] = _generator.get("index_slug")
                            self.create_page(**page)

            # NORMAL PAGE
            else:
                self.create_page(**_default_page)