4da1e64c03
This shows how people can use tvix_serde to deserialise configuration structs for their programs from Nix code. Change-Id: I71bf4e03dce19dddafe67dd729b4e4b10719a739 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7945 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
34 lines
1,006 B
Rust
34 lines
1,006 B
Rust
//! This program demonstrates how to use tvix_serde to deserialise
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//! program configuration (or other data) from Nix code.
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//!
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//! This makes it possible to use Nix as an embedded config language.
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//! For greater control over evaluation, and for features like adding
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//! additional builtins, depending directly on tvix_eval would be
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//! required.
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use serde::Deserialize;
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use std::collections::HashMap;
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#[derive(Debug, Deserialize)]
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enum Flavour {
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Tasty,
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Okay,
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Eww,
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}
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#[derive(Debug, Deserialize)]
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struct Data {
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name: String,
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foods: HashMap<String, Flavour>,
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}
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fn main() {
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// Get the content from wherever, read it from a file, receive it
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// over the network - whatever floats your boat! We'll include it
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// as a string.
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let code = include_str!("foods.nix");
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// Now you can use tvix_serde to deserialise the struct:
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let foods: Data = tvix_serde::from_str(code).expect("deserialisation should succeed");
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println!("These are the foods:\n{:#?}", foods);
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}
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