systemprompt_loader/config_loader/
mod.rs

1//! Reads, parses, and merges the active services configuration.
2//!
3//! [`ConfigLoader`] is the only public entry point. It resolves the active
4//! profile (via [`systemprompt_config::ProfileBootstrap`]) to a YAML path,
5//! parses the root file, recursively resolves the `includes:` graph
6//! (rejecting cycles and duplicate definitions), inlines `!include`
7//! references inside agent system prompts and skill instructions, and
8//! finally validates the merged configuration before returning it to the
9//! caller.
10
11mod includes;
12mod merge;
13mod types;
14
15use std::collections::HashSet;
16use std::fs;
17use std::path::{Path, PathBuf};
18
19use systemprompt_config::ProfileBootstrap;
20use systemprompt_models::services::ServicesConfig;
21
22use crate::error::{ConfigLoadError, ConfigLoadResult};
23
24use includes::resolve_includes_recursively;
25use merge::{resolve_skill_instruction_includes, resolve_system_prompt_includes};
26use types::IncludeResolveCtx;
27
28#[derive(Debug)]
29pub struct ConfigLoader {
30    base_path: PathBuf,
31    config_path: PathBuf,
32}
33
34impl ConfigLoader {
35    #[must_use]
36    pub fn new(config_path: PathBuf) -> Self {
37        let base_path = config_path
38            .parent()
39            .unwrap_or_else(|| Path::new("."))
40            .to_path_buf();
41        Self {
42            base_path,
43            config_path,
44        }
45    }
46
47    pub fn for_active_profile() -> ConfigLoadResult<Self> {
48        let profile = ProfileBootstrap::get()?;
49        let config_path = PathBuf::from(profile.paths.config());
50        Ok(Self::new(config_path))
51    }
52
53    pub fn load() -> ConfigLoadResult<ServicesConfig> {
54        Self::for_active_profile()?.run()
55    }
56
57    pub fn load_from_path(path: &Path) -> ConfigLoadResult<ServicesConfig> {
58        Self::new(path.to_path_buf()).run()
59    }
60
61    #[cfg(any(test, feature = "expose-internals"))]
62    pub fn load_from_content(content: &str, path: &Path) -> ConfigLoadResult<ServicesConfig> {
63        Self::new(path.to_path_buf()).run_from_content(content)
64    }
65
66    pub fn validate_file(path: &Path) -> ConfigLoadResult<()> {
67        Self::load_from_path(path).map(|_| ())
68    }
69
70    fn run(&self) -> ConfigLoadResult<ServicesConfig> {
71        let content = fs::read_to_string(&self.config_path).map_err(|e| ConfigLoadError::Io {
72            path: self.config_path.clone(),
73            source: e,
74        })?;
75        self.run_from_content(&content)
76    }
77
78    fn run_from_content(&self, content: &str) -> ConfigLoadResult<ServicesConfig> {
79        let mut merged: ServicesConfig =
80            serde_yaml::from_str(content).map_err(|e| ConfigLoadError::Yaml {
81                path: self.config_path.clone(),
82                source: e,
83            })?;
84
85        let includes = std::mem::take(&mut merged.includes);
86
87        let mut visited: HashSet<PathBuf> = HashSet::new();
88        if let Ok(canonical_root) = fs::canonicalize(&self.config_path) {
89            visited.insert(canonical_root);
90        }
91        {
92            let mut ctx = IncludeResolveCtx {
93                visited: &mut visited,
94                merged: &mut merged,
95                chain: vec![self.config_path.clone()],
96            };
97            for include_path in &includes {
98                resolve_includes_recursively(
99                    &self.base_path,
100                    include_path,
101                    &self.config_path,
102                    &mut ctx,
103                )?;
104            }
105        }
106
107        resolve_system_prompt_includes(&self.base_path, &mut merged)?;
108        resolve_skill_instruction_includes(&self.base_path, &mut merged)?;
109
110        merged.settings.apply_env_overrides();
111
112        merged
113            .validate()
114            .map_err(|e| ConfigLoadError::Validation(e.to_string()))?;
115
116        Ok(merged)
117    }
118
119    pub fn get_includes(&self) -> ConfigLoadResult<Vec<String>> {
120        #[derive(serde::Deserialize)]
121        struct IncludesOnly {
122            #[serde(default)]
123            includes: Vec<String>,
124        }
125
126        let content = fs::read_to_string(&self.config_path).map_err(|e| ConfigLoadError::Io {
127            path: self.config_path.clone(),
128            source: e,
129        })?;
130        let parsed: IncludesOnly =
131            serde_yaml::from_str(&content).map_err(|e| ConfigLoadError::Yaml {
132                path: self.config_path.clone(),
133                source: e,
134            })?;
135        Ok(parsed.includes)
136    }
137
138    pub fn list_all_includes(&self) -> ConfigLoadResult<Vec<(String, bool)>> {
139        self.get_includes()?
140            .into_iter()
141            .map(|include| {
142                let exists = self.base_path.join(&include).exists();
143                Ok((include, exists))
144            })
145            .collect()
146    }
147
148    #[must_use]
149    pub fn base_path(&self) -> &Path {
150        &self.base_path
151    }
152}
systemprompt_loader/config_loader/mod.rs

systemprompt_loader/config_loader/
mod.rs
