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use std::str::from_utf8;
/// Default built-in languages.toml.
pub fn default_lang_config() -> toml::Value {
let default_config = include_bytes!("../../languages.toml");
toml::from_str(from_utf8(default_config).unwrap())
.expect("Could not parse built-in languages.toml to valid toml")
}
/// User configured languages.toml file, merged with the default config.
pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
let config = crate::local_config_dirs()
.into_iter()
.chain([crate::config_dir()].into_iter())
.map(|path| path.join("languages.toml"))
.filter_map(|file| {
std::fs::read_to_string(file)
.map(|config| toml::from_str(&config))
.ok()
})
.collect::<Result<Vec<_>, _>>()?
.into_iter()
.chain([default_lang_config()].into_iter())
.fold(toml::Value::Table(toml::value::Table::default()), |a, b| {
// combines for example
// b:
// [[language]]
// name = "toml"
// language-server = { command = "taplo", args = ["lsp", "stdio"] }
//
// a:
// [[language]]
// language-server = { command = "/usr/bin/taplo" }
//
// into:
// [[language]]
// name = "toml"
// language-server = { command = "/usr/bin/taplo" }
//
// thus it overrides the third depth-level of b with values of a if they exist, but otherwise merges their values
crate::merge_toml_values(b, a, 3)
});
Ok(config)
}
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