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https://github.com/OMGeeky/confique.git
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49828fc2e3
I think this is an overall improvement. A few things done here: - They are available as `::env::parse` instead of `::env_utils`. The `env` module gets functions of its own soon enough. - Renamed functions to be shorter: `list_by_sep`, `list_by_comma`, ... - The docs were adjusted. One example is enough. And the functions with a fixed separator don't need the full docs again. That way we can avoid the `paste` dependency. - Functions now always return `Result<C, _>`. While the previous version was slightly more flexible, I don't think anyone would benefit from that flexibility (as `parse_env` requires `Result<_, _>` anyway) and this way it's a bit clearer what the function does, especially for those who don't know the nifty `FromIterator for Result` impl. - The example was adjusted accordingly. I also changed the names to obviously dummy names as I didn't know the existing names and don't want to spend time investigating whether I want their names in my code base :D
64 lines
1.6 KiB
Rust
64 lines
1.6 KiB
Rust
#![allow(dead_code)]
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use confique::Config;
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use std::{collections::HashSet, num::NonZeroU64, path::PathBuf, str::FromStr, convert::Infallible};
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#[derive(Debug, Config)]
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struct Conf {
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#[config(env = "PATHS", parse_env = confique::env::parse::list_by_colon)]
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paths: HashSet<PathBuf>,
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#[config(env = "PORTS", parse_env = confique::env::parse::list_by_comma)]
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ports: Vec<u16>,
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#[config(env = "NAMES", parse_env = confique::env::parse::list_by_sep::<'|', _, _>)]
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names: Vec<String>,
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#[config(env = "TIMEOUT", parse_env = NonZeroU64::from_str)]
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timeout_seconds: NonZeroU64,
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#[config(env = "FORMATS", parse_env = parse_formats)]
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formats: Vec<Format>,
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}
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#[derive(Debug, serde::Deserialize)]
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enum Format {
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Env,
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Toml,
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Json5,
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Yaml,
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}
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/// Example custom parser.
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fn parse_formats(input: &str) -> Result<Vec<Format>, Infallible> {
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let mut result = Vec::new();
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if input.contains("toml") {
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result.push(Format::Toml);
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}
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if input.contains("env") {
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result.push(Format::Env);
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}
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if input.contains("yaml") {
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result.push(Format::Yaml);
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}
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if input.contains("json5") {
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result.push(Format::Json5);
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}
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Ok(result)
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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std::env::set_var("PATHS", "/bin/ls,/usr/local/bin,/usr/bin/ls");
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std::env::set_var("PORTS", "8080,8888,8000");
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std::env::set_var("NAMES", "Alex|Peter|Mary");
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std::env::set_var("TIMEOUT", "100");
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std::env::set_var("FORMATS", "json5,yaml;.env");
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println!("{:#?}", Conf::builder().env().load()?);
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Ok(())
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}
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