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//! # itconfig //! //! Simple configuration with macro for rust application. //! //! //! ## Motivation //! //! I began to use rust with web programming experience where environment variables are widely used //! and often there are more then 50 of them. First I looked at already created libraries. //! But there it's necessary to initialise structure that needs to be moved to each function //! where you need variable. It uses little bit memory, but configuration lifetime is as long //! as application lifetime. Because of it I decided to create my own library. //! //! //! ## Installation //! //! These macros require a Rust compiler version 1.31 or newer. //! //! Add `itconfig = { version = "1.0", features = ["macro"] }` as a dependency in `Cargo.toml`. //! //! //! `Cargo.toml` example: //! //! ```toml //! [package] //! name = "my-crate" //! version = "0.1.0" //! authors = ["Me <user@rust-lang.org>"] //! //! [dependencies] //! itconfig = { version = "1.0", features = ["macro"] } //! ``` //! //! //! ## Basic usage //! //! ```rust //! use itconfig::config; //! use std::env; //! //use dotenv::dotenv; //! //! config! { //! DEBUG: bool => false, //! //! #[env_name = "APP_HOST"] //! HOST: String => "127.0.0.1", //! //! database { //! URL < ( //! "postgres://", //! POSTGRES_USERNAME => "user", //! ":", //! POSTGRES_PASSWORD => "pass", //! "@", //! POSTGRES_HOST => "localhost:5432", //! "/", //! POSTGRES_DB => "test", //! ), //! //! pool { //! MAX_SIZE: usize => 15, //! }, //! }, //! //! sentry { //! DSN: Option<&'static str>, //! }, //! //! feature { //! static CORS: bool => false, //! //! static GRAPHQL_PLAYGROUND: bool => false, //! }, //! } //! //! fn main () { //! // dotenv().expect("dotenv setup to be successful"); //! // or //! env::set_var("FEATURE_CORS", "true"); //! //! config::init(); //! assert_eq!(config::HOST(), String::from("127.0.0.1")); //! assert_eq!(config::database::URL(), String::from("postgres://user:pass@localhost:5432/test")); //! assert_eq!(config::database::pool::MAX_SIZE(), 15); //! assert_eq!(config::sentry::DSN(), None); //! assert_eq!(config::feature::CORS(), true); //! } //! ``` //! //! Macro is an optional feature, disabled by default. You can use this library without macro. //! //! ```rust //! use itconfig::*; //! use std::env; //! // use dotenv::dotenv; //! //! fn main() { //! // dotenv().expect("dotenv setup to be successful"); //! // or //! env::set_var("DATABASE_URL", "postgres://127.0.0.1:5432/test"); //! //! let database_url = get_env::<String>("DATABASE_URL").unwrap(); //! let new_profile: bool = get_env_or_default("FEATURE_NEW_PROFILE", false); //! let articles_per_page: u32 = get_env_or_set_default("ARTICLES_PER_PAGE", 10); //! } //! ``` //! //! ## Available features //! //! * **default** - ["primitives"] //! * **macro** - Activates `config!` macros for easy configure web application. //! * **primitives** - Group for features: `numbers` and `bool`. //! * **numbers** - Group for features: `int`, `uint` and `float`. //! * **int** - Group for features: `i8`, `i16`, `i32`, `i64`, `i128` and `isize`. //! * **uint** - Group for features: `u8`, `u16`, `u32`, `u64`, `u128` and `usize`. //! * **float** - Group for features: `f32` and `f64` //! * **i8** - impl EnvString for `i8` type //! * **i16** - impl EnvString for `i16` type //! * **i32** - impl EnvString for `i32` type //! * **i64** - impl EnvString for `i64` type //! * **i128** - impl EnvString for `i128` type //! * **isize** - impl EnvString for `isize` type //! * **u8** - impl EnvString for `u8` type //! * **u16** - impl EnvString for `u16` type //! * **u32** - impl EnvString for `u32` type //! * **u64** - impl EnvString for `u64` type //! * **u128** - impl EnvString for `u128` type //! * **usize** - impl EnvString for `usize` type //! * **f32** - impl EnvString for `f32` type //! * **f64** - impl EnvString for `f64` type //! * **bool** - impl EnvString for `bool` type //! * **json_array** - Add EnvString impl for vector type (uses optional `serde_json` package). ⚠ **_DEPRECATED_** //! // Rustc lints. #![forbid(unsafe_code)] #![forbid(non_ascii_idents)] #![deny( missing_debug_implementations, missing_docs, unstable_features, unused_imports, unused_qualifications )] // Clippy lints #![deny(clippy::all)] #![allow(clippy::needless_doctest_main)] ///////////////////////////////////////////////////////////////////////////// mod envstr; mod error; mod get_env; mod get_vec_env; pub(crate) mod utils; pub use self::envstr::*; pub use self::error::*; pub use self::get_env::*; pub use self::get_vec_env::*; #[cfg(feature = "macro")] extern crate itconfig_macro; #[cfg(feature = "macro")] pub use itconfig_macro::*;