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lib/services/temp_file.ex
defmodule Services.TempFile do
@moduledoc """
Singleton service for creating temporary files via Briefly.
This centralizes ownership of Briefly-created temp files to a single
long-lived process, so that files can survive across multiple tool calls
within the same BEAM node. All options are passed through to
`Briefly.create/1` unchanged, allowing future callers to migrate without
changing their option shapes.
"""
use GenServer
@type opts :: Keyword.t()
@spec start_link(any) :: GenServer.on_start()
def start_link(_opts) do
GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
end
@impl true
def init(:ok) do
{:ok, %{}}
end
@doc """
Create a new temporary file via Briefly.
Accepts an optional keyword list of options and forwards them unchanged
to `Briefly.create/1`.
"""
@spec mktemp(opts) :: {:ok, Path.t()} | {:error, term()}
def mktemp(opts \\ []) do
GenServer.call(__MODULE__, {:mktemp, opts})
end
@doc """
Like `mktemp/1`, but raises on error.
"""
@spec mktemp!(opts) :: Path.t()
def mktemp!(opts \\ []) do
case mktemp(opts) do
{:ok, path} -> path
{:error, reason} -> raise "Services.TempFile.mktemp! failed: #{inspect(reason)}"
end
end
@impl true
def handle_call({:mktemp, opts}, _from, state) do
reply =
case Briefly.create(opts) do
{:ok, path} -> {:ok, path}
{:error, reason} -> {:error, reason}
end
{:reply, reply, state}
end
end