mirror of
https://github.com/livebook-dev/livebook.git
synced 2024-11-15 12:25:31 +08:00
71 lines
2.4 KiB
Elixir
71 lines
2.4 KiB
Elixir
defmodule LivebookWeb.MemoryProvider do
|
|
@gzippable_exts ~w(.js .css .txt .text .html .json .svg .eot .ttf)
|
|
|
|
# Configurable implementation of `LivebookWeb.StaticPlug.Provider` behaviour,
|
|
# that bundles the files into the module compiled source.
|
|
#
|
|
# ## `use` options
|
|
#
|
|
# * `:from` (**required**) - where to read the static files from. See `Plug.Static` for more details.
|
|
#
|
|
# * `:gzip` - whether to bundle gzipped version of the files,
|
|
# in which case the uncompressed files are not included. Defaults to `false`.
|
|
|
|
defmacro __using__(opts) do
|
|
quote bind_quoted: [opts: opts] do
|
|
@behaviour LivebookWeb.StaticPlug.Provider
|
|
|
|
from = Keyword.fetch!(opts, :from)
|
|
static_path = LivebookWeb.StaticPlug.Provider.static_path(from)
|
|
paths = LivebookWeb.MemoryProvider.__paths__(static_path)
|
|
files = LivebookWeb.MemoryProvider.__preload_files__!(static_path, paths, opts)
|
|
|
|
for path <- paths do
|
|
abs_path = Path.join(static_path, path)
|
|
@external_resource Path.relative_to_cwd(abs_path)
|
|
end
|
|
|
|
@impl true
|
|
def get_file(segments, compression)
|
|
|
|
for {segments, compression, file} <- files do
|
|
def get_file(unquote(segments), unquote(compression)), do: unquote(Macro.escape(file))
|
|
end
|
|
|
|
def get_file(_, _), do: nil
|
|
|
|
# Force recompilation if the static files change.
|
|
def __mix_recompile__? do
|
|
current_paths = LivebookWeb.MemoryProvider.__paths__(unquote(static_path))
|
|
:erlang.md5(current_paths) != unquote(:erlang.md5(paths))
|
|
end
|
|
end
|
|
end
|
|
|
|
def __preload_files__!(static_path, paths, opts) do
|
|
gzip? = Keyword.get(opts, :gzip, false)
|
|
|
|
Enum.map(paths, fn path ->
|
|
segments = Path.split(path)
|
|
abs_path = Path.join(static_path, path)
|
|
content = File.read!(abs_path)
|
|
digest = content |> :erlang.md5() |> Base.encode16(case: :lower)
|
|
|
|
if gzip? and Path.extname(path) in @gzippable_exts do
|
|
gzipped_content = :zlib.gzip(content)
|
|
|
|
{segments, :gzip, %LivebookWeb.StaticPlug.File{content: gzipped_content, digest: digest}}
|
|
else
|
|
{segments, nil, %LivebookWeb.StaticPlug.File{content: content, digest: digest}}
|
|
end
|
|
end)
|
|
end
|
|
|
|
def __paths__(static_path) do
|
|
Path.join(static_path, "**")
|
|
|> Path.wildcard()
|
|
|> Enum.reject(&File.dir?/1)
|
|
|> Enum.map(&String.replace_leading(&1, static_path <> "/", ""))
|
|
|> Enum.sort()
|
|
end
|
|
end
|