lean_ctx/tools/
server_paths.rs

1use super::server::LeanCtxServer;
2use super::startup::{
3    has_project_marker, is_suspicious_root, maybe_derive_project_root_from_absolute,
4};
5
6impl LeanCtxServer {
7    pub fn checkpoint_interval_effective() -> usize {
8        if let Ok(v) = std::env::var("LEAN_CTX_CHECKPOINT_INTERVAL")
9            && let Ok(parsed) = v.trim().parse::<usize>()
10        {
11            return parsed;
12        }
13        let profile_interval = crate::core::profiles::active_profile()
14            .autonomy
15            .checkpoint_interval_effective();
16        if profile_interval > 0 {
17            return profile_interval as usize;
18        }
19        crate::core::config::Config::load().checkpoint_interval as usize
20    }
21
22    /// Resolves a (possibly relative) tool path against the session's project_root.
23    /// Absolute paths and "." are returned as-is. Relative paths like "src/main.rs"
24    /// are joined with project_root so tools work regardless of the server's cwd.
25    pub async fn resolve_path(&self, path: &str) -> Result<String, String> {
26        let normalized = crate::core::pathutil::normalize_tool_path(path);
27        if normalized.is_empty() || normalized == "." {
28            return Ok(normalized);
29        }
30        let p = std::path::Path::new(&normalized);
31
32        let (resolved, jail_root, extra_roots) = {
33            let session = self.session.read().await;
34            let jail_root = session
35                .project_root
36                .as_deref()
37                .or(session.shell_cwd.as_deref())
38                .unwrap_or(".")
39                .to_string();
40
41            let resolved = if p.is_absolute() || p.exists() {
42                std::path::PathBuf::from(&normalized)
43            } else if let Some(ref root) = session.project_root {
44                let joined = std::path::Path::new(root).join(&normalized);
45                if joined.exists() {
46                    joined
47                } else if let Some(ref cwd) = session.shell_cwd {
48                    std::path::Path::new(cwd).join(&normalized)
49                } else {
50                    std::path::Path::new(&jail_root).join(&normalized)
51                }
52            } else if let Some(ref cwd) = session.shell_cwd {
53                std::path::Path::new(cwd).join(&normalized)
54            } else {
55                std::path::Path::new(&jail_root).join(&normalized)
56            };
57
58            // Session-scoped trusted roots (MCP roots/list, config extra_roots,
59            // git worktrees) must widen the jail for an explicit path (#403).
60            (resolved, jail_root, session.extra_roots.clone())
61        };
62
63        let jail_root_path = std::path::Path::new(&jail_root);
64        let jailed = match crate::core::pathjail::jail_path_with_roots(
65            &resolved,
66            jail_root_path,
67            &extra_roots,
68        ) {
69            Ok(p) => p,
70            Err(e) => {
71                if p.is_absolute() {
72                    if let Some(new_root) = maybe_derive_project_root_from_absolute(&resolved) {
73                        let cfg_allow = std::env::var("LEAN_CTX_ALLOW_REROOT").map_or_else(
74                            |_| crate::core::config::Config::load().allow_auto_reroot,
75                            |v| v == "1" || v == "true",
76                        );
77                        let candidate_under_jail = resolved.starts_with(jail_root_path);
78                        // #580: when the server was launched from an agent/IDE
79                        // config dir (e.g. ~/.copilot), that jail is never a real
80                        // project boundary. `maybe_derive_project_root_from_absolute`
81                        // already guarantees the new root carries a real project
82                        // marker, so correcting to it is a root *fix*, not a jail
83                        // weakening — allow it without the `allow_auto_reroot`
84                        // opt-in. Non-agent weak roots keep the conservative gate.
85                        let allow_reroot = if candidate_under_jail {
86                            false
87                        } else if is_suspicious_root(jail_root_path) {
88                            true
89                        } else if !cfg_allow {
90                            false
91                        } else if let Some(ref trusted_root) = self.startup_project_root {
92                            std::path::Path::new(trusted_root) == new_root.as_path()
93                        } else {
94                            !has_project_marker(jail_root_path)
95                        };
96
97                        if allow_reroot {
98                            let mut session = self.session.write().await;
99                            let new_root_str = new_root.to_string_lossy().to_string();
100                            session.project_root = Some(new_root_str.clone());
101                            session.shell_cwd = self
102                                .startup_shell_cwd
103                                .as_ref()
104                                .filter(|cwd| std::path::Path::new(cwd).starts_with(&new_root))
105                                .cloned()
106                                .or_else(|| Some(new_root_str.clone()));
107                            let _ = session.save();
108
109                            crate::core::pathjail::jail_path_with_roots(
110                                &resolved,
111                                &new_root,
112                                &extra_roots,
113                            )?
114                        } else {
115                            return Err(e);
116                        }
117                    } else {
118                        return Err(e);
119                    }
120                } else {
121                    return Err(e);
122                }
123            }
124        };
125
126        crate::core::io_boundary::check_secret_path_for_tool("resolve_path", &jailed)?;
127
128        Ok(crate::core::pathutil::normalize_tool_path(
129            &jailed.to_string_lossy().replace('\\', "/"),
130        ))
131    }
132
133    /// Like `resolve_path`, but returns the original path on failure instead of an error.
134    pub async fn resolve_path_or_passthrough(&self, path: &str) -> String {
135        self.resolve_path(path)
136            .await
137            .unwrap_or_else(|_| path.to_string())
138    }
139}
lean_ctx/tools/server_paths.rs

lean_ctx/tools/
server_paths.rs
