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