/*
* Copyright (c) 2021 Peter Pentchev <roam@ringlet.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
//! Query a program for supported features.
//!
//! The [`obtain::obtain_features`][crate::obtain::obtain_features]
//! function queries a program for the features that it supports
//! via various methods (e.g. running it with the `--features`
//! command-line option) and allows other programs to check for
//! the presence and, possibly, versions of specific features.
//!
//! ```rust
//! # use std::error;
//!
//! use feature_check::defs;
//! use feature_check::obtain;
//!
//! # fn main() -> Result<(), Box<dyn error::Error>> {
//! match obtain::obtain_features(&defs::Config {
//! program: "confget".to_string(),
//! ..defs::Config::default()
//! })? {
//! defs::Obtained::NotSupported => eprintln!("Feature query not supported"),
//! defs::Obtained::Failed(err) => eprintln!("Could not query for features: {}", err),
//! defs::Obtained::Features(res) => {
//! let mut features: Vec<&String> = res.keys().collect();
//! features.sort_unstable();
//! for name in &features {
//! println!("{}", name);
//! }
//! }
//! }
//! # Ok(())
//! # }
//! ```
extern crate quick_error;