mirror of https://github.com/rust-lang/rust.git
57 lines
1.6 KiB
Rust
57 lines
1.6 KiB
Rust
use std::fs;
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use std::process;
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fn load_config_file() -> Vec<(String, Option<String>)> {
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fs::read_to_string("config.txt")
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.unwrap()
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.lines()
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.map(|line| if let Some((line, _comment)) = line.split_once('#') { line } else { line })
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.map(|line| line.trim())
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.filter(|line| !line.is_empty())
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.map(|line| {
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if let Some((key, val)) = line.split_once('=') {
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(key.trim().to_owned(), Some(val.trim().to_owned()))
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} else {
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(line.to_owned(), None)
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}
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})
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.collect()
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}
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pub(crate) fn get_bool(name: &str) -> bool {
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let values = load_config_file()
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.into_iter()
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.filter(|(key, _)| key == name)
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.map(|(_, val)| val)
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.collect::<Vec<_>>();
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if values.is_empty() {
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false
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} else {
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if values.iter().any(|val| val.is_some()) {
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eprintln!("Boolean config `{}` has a value", name);
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process::exit(1);
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}
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true
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}
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}
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pub(crate) fn get_value(name: &str) -> Option<String> {
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let values = load_config_file()
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.into_iter()
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.filter(|(key, _)| key == name)
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.map(|(_, val)| val)
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.collect::<Vec<_>>();
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if values.is_empty() {
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None
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} else if values.len() == 1 {
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if values[0].is_none() {
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eprintln!("Config `{}` missing value", name);
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process::exit(1);
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}
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values.into_iter().next().unwrap()
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} else {
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eprintln!("Config `{}` given multiple values: {:?}", name, values);
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process::exit(1);
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}
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}
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