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[chore](trx-app): drop per-binary config file support

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Only trx-rs.toml with [trx-server] / [trx-client] section headers is
now supported. Simplify ConfigFile trait to a single required method
section_key(); remove config_filename(), combined_key(), and
default_search_paths(). load_from_file() now errors when the expected
section is absent rather than falling back to flat parsing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit is contained in:
Stan Grams
2026-02-28 08:45:32 +01:00
parent 1ee0389de8
commit 2f2a74b810
4 changed files with 37 additions and 108 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/trx-app/src/config.rs
+22 -67
View File
@@ -15,9 +15,9 @@ pub enum ConfigError {
ParseError(PathBuf, String),
}
/// Returns search paths for the combined `trx-rs.toml` config file
/// Returns the default search paths for `trx-rs.toml`
/// (current directory → XDG config → /etc).
pub fn combined_config_paths() -> Vec<PathBuf> {
fn config_search_paths() -> Vec<PathBuf> {
let mut paths = vec![PathBuf::from("trx-rs.toml")];
if let Some(config_dir) = dirs::config_dir() {
paths.push(config_dir.join("trx-rs").join("trx-rs.toml"));
@@ -52,82 +52,37 @@ fn load_section_from_file<T: DeserializeOwned>(
Ok(Some(cfg))
}
/// Trait for loading configuration files with default paths.
/// Trait for loading configuration from a `trx-rs.toml` section.
pub trait ConfigFile: Sized + Default + DeserializeOwned {
/// Config filename (e.g., "server.toml" or "client.toml")
fn config_filename() -> &'static str;
/// Section key in `trx-rs.toml` (e.g. `"trx-server"` or `"trx-client"`).
fn section_key() -> &'static str;
/// Section key inside a combined `trx-rs.toml` file, e.g. `"trx-server"`.
/// Return `None` (the default) to disable combined-file support.
fn combined_key() -> Option<&'static str> {
None
}
/// Load config from a specific file path.
/// Load the section from a specific file path.
///
/// If `combined_key()` is set and the file contains that section header,
/// only that section is deserialized. Otherwise the whole file is used,
/// preserving full backward compatibility with per-binary config files.
/// Returns an error if the file cannot be read, is not valid TOML, or
/// does not contain the expected `[<section_key>]` header.
fn load_from_file(path: &Path) -> Result<Self, ConfigError> {
if let Some(key) = Self::combined_key() {
// Peek at the file: if it contains our section, use that section.
if let Ok(Some(cfg)) = load_section_from_file::<Self>(path, key) {
return Ok(cfg);
}
}
let content = std::fs::read_to_string(path)
.map_err(|e| ConfigError::ReadError(path.to_path_buf(), e.to_string()))?;
toml::from_str(&content)
.map_err(|e| ConfigError::ParseError(path.to_path_buf(), e.to_string()))
load_section_from_file::<Self>(path, Self::section_key())?.ok_or_else(|| {
ConfigError::ParseError(
path.to_path_buf(),
format!("missing [{}] section", Self::section_key()),
)
})
}
/// Search default paths and load first found config.
/// Search default paths (`trx-rs.toml` in CWD → XDG → /etc) and load
/// the first file that contains the expected section.
///
/// Search order (for each location tier — CWD, XDG, /etc):
/// 1. `trx-rs.toml` with our section header (combined file)
/// 2. per-binary flat file (e.g. `trx-server.toml`)
///
/// Returns `(config, path_where_found)` or `(Default::default(), None)`.
/// Returns `(config, path_where_found)` or `(Default::default(), None)`
/// when no config file is found.
fn load_from_default_paths() -> Result<(Self, Option<PathBuf>), ConfigError> {
let combined = combined_config_paths();
let flat = Self::default_search_paths();
// Build interleaved list: (combined_path, flat_path) per tier.
let tiers = combined.len().max(flat.len());
for i in 0..tiers {
// Combined file at this tier
if let Some(key) = Self::combined_key() {
if let Some(path) = combined.get(i) {
if path.exists() {
if let Some(cfg) = load_section_from_file::<Self>(path, key)? {
return Ok((cfg, Some(path.clone())));
}
// Combined file present but our section absent → skip to flat.
}
}
}
// Flat file at this tier
if let Some(path) = flat.get(i) {
if path.exists() {
let cfg = Self::load_from_file(path)?;
return Ok((cfg, Some(path.clone())));
for path in config_search_paths() {
if path.exists() {
if let Some(cfg) = load_section_from_file::<Self>(&path, Self::section_key())? {
return Ok((cfg, Some(path)));
}
}
}
Ok((Self::default(), None))
}
/// Default search paths for the per-binary flat config file
/// (current dir → XDG → /etc).
fn default_search_paths() -> Vec<PathBuf> {
let mut paths = vec![PathBuf::from(Self::config_filename())];
if let Some(config_dir) = dirs::config_dir() {
paths.push(config_dir.join("trx-rs").join(Self::config_filename()));
}
paths.push(PathBuf::from("/etc/trx-rs").join(Self::config_filename()));
paths
}
}
src/trx-app/src/lib.rs
+1 -1
View File
@@ -7,7 +7,7 @@ pub mod logging;
pub mod plugins;
pub mod util;
pub use config::{combined_config_paths, ConfigError, ConfigFile};
pub use config::{ConfigError, ConfigFile};
pub use logging::init_logging;
pub use plugins::{load_backend_plugins, load_frontend_plugins};
pub use util::normalize_name;