kleinernik
`Jason.Encoder is not available, cannot derive Jason.Encoder` using `mix compile.elixir`
Hi,
I am trying out the script from dashbits new blogpost Rewriting imports to aliases with compilation tracers - Dashbit Blog on my project.
They use the compile.elixir task in there. I can’t get this task to run on my project, while mix compile runs just fine. The errors I keep getting with compile.elixir all are ** (ArgumentError) Jason.Encoder is not available, cannot derive Jason.Encoder at various places in my code where I derive Jason.Encoder.
Anybody got any idea if this is expected behavior, an error on my side or a bug?
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kleinernik
In case someone runs into the same problems I have run into:
- If you derive Protocols of external dependencies like
Jason.Encoder, forcompile.elixirto work, you need to first runmix compile.protocols - Unlike stated here Rewriting imports to aliases with compilation tracers - Dashbit Blog, it seems like you need to use
mix run import2alias.exs ...instead ofelixir import2alias.exs ...otherwise the will be no mix environment (af far as I understand) and you’ll get this error:** (exit) exited in: GenServer.call(Mix.ProjectStack, {:get_stack, #Function<10.68469381/1 in Mix.ProjectStack.peek/0>}, :infinity). At least that worked for me.
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