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Diffstat (limited to '')
-rw-r--r-- | tvix/serde/examples/nixpkgs.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tvix/serde/examples/nixpkgs.rs b/tvix/serde/examples/nixpkgs.rs new file mode 100644 index 000000000000..ad8c4160b5d0 --- /dev/null +++ b/tvix/serde/examples/nixpkgs.rs @@ -0,0 +1,34 @@ +//! This program demonstrates deserialising some configuration +//! structure from Nix code that makes use of nixpkgs.lib +//! +//! This example does not add the full set of Nix features (i.e. +//! builds & derivations). + +use serde::Deserialize; + +#[derive(Debug, Deserialize)] +struct Config { + host: String, + port: usize, +} + +fn main() { + let code = r#" + let + lib = import <nixpkgs/lib>; + host = lib.strings.concatStringsSep "." ["foo" "example" "com"]; + in { + inherit host; + port = 4242; + } + "#; + + let result = tvix_serde::from_str_with_config::<Config, _>(code, |eval| { + eval.enable_impure(None); + }); + + match result { + Ok(cfg) => println!("Config says: {}:{}", cfg.host, cfg.port), + Err(e) => eprintln!("{:?} / {}", e, e), + } +} |