soma_gateway/config/
defaults.rs

1use std::path::{Path, PathBuf};
2
3use super::ConfigError;
4
5#[derive(Debug, Clone, PartialEq, Eq)]
6pub struct GatewayPaths {
7    home: PathBuf,
8}
9
10impl GatewayPaths {
11    pub fn new(home: PathBuf) -> Result<Self, ConfigError> {
12        validate_gateway_home(&home)?;
13        Ok(Self { home })
14    }
15
16    pub fn from_env() -> Result<Self, ConfigError> {
17        let home = std::env::var_os("MCP_GATEWAY_HOME")
18            .map(|path| normalize_env_gateway_home(PathBuf::from(path)))
19            .unwrap_or_else(default_gateway_home);
20        Self::new(home)
21    }
22
23    #[must_use]
24    pub fn home(&self) -> &Path {
25        &self.home
26    }
27
28    #[must_use]
29    pub fn config_path(&self) -> PathBuf {
30        self.home.join("config.toml")
31    }
32
33    #[must_use]
34    pub fn env_path(&self) -> PathBuf {
35        self.home.join(".env")
36    }
37}
38
39const GATEWAY_HOME_DIRNAME: &str = ".mcp-gateway";
40
41fn default_gateway_home() -> PathBuf {
42    std::env::var_os("HOME")
43        .map(PathBuf::from)
44        .unwrap_or_else(|| PathBuf::from("."))
45        .join(GATEWAY_HOME_DIRNAME)
46}
47
48fn normalize_env_gateway_home(path: PathBuf) -> PathBuf {
49    if path.file_name().and_then(|name| name.to_str()) == Some(GATEWAY_HOME_DIRNAME) {
50        path
51    } else {
52        path.join(GATEWAY_HOME_DIRNAME)
53    }
54}
55
56fn validate_gateway_home(path: &Path) -> Result<(), ConfigError> {
57    if path.as_os_str().is_empty() {
58        return Err(ConfigError::invalid("gateway_home", "must not be empty"));
59    }
60    if !path.is_absolute() {
61        return Err(ConfigError::invalid("gateway_home", "must be absolute"));
62    }
63    let leaf = path
64        .file_name()
65        .and_then(|name| name.to_str())
66        .unwrap_or("");
67    if leaf != GATEWAY_HOME_DIRNAME {
68        return Err(ConfigError::invalid(
69            "gateway_home",
70            "must point at a .mcp-gateway directory",
71        ));
72    }
73    Ok(())
74}
75
76#[cfg(test)]
77#[path = "defaults_tests.rs"]
78mod tests;
soma_gateway/config/defaults.rs

soma_gateway/config/
defaults.rs
