def clone_layer(layer, provider_names):
from TileStache.Core import Layer
copy = Layer(
layer.config,
layer.projection,
layer.metatile,
layer.stale_lock_timeout,
layer.cache_lifespan,
layer.write_cache,
layer.allowed_origin,
layer.max_cache_age,
layer.redirects,
layer.preview_lat,
layer.preview_lon,
layer.preview_zoom,
layer.preview_ext,
layer.bounds,
layer.dim,
)
copy.provider = layer.provider
copy.provider(copy, provider_names)
return copy
