podのモジュール分割

crates/pod/src/runtime/dir.rs

@@ -0,0 +1,261 @@
+use std::io;
+use std::path::{Path, PathBuf};
+
+use manifest::ScopeRule;
+use serde::{Deserialize, Serialize};
+use tokio::fs;
+
+use crate::shared_state::PodSharedState;
+
+/// One spawned-child record persisted to `spawned_pods.json`.
+///
+/// Written by the spawner after a successful `SpawnPod` tool call so
+/// `ListPods` (future ticket) and a restored spawner can enumerate
+/// their live children without re-querying `scope.lock`.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SpawnedPodRecord {
+    /// Spawned Pod's identity.
+    pub pod_name: String,
+    /// Spawned Pod's Unix socket path.
+    pub socket_path: PathBuf,
+    /// Scope allow rules delegated to the spawned Pod.
+    pub scope_delegated: Vec<ScopeRule>,
+    /// Socket path the spawned Pod was told to use for callbacks
+    /// (= this Pod's own socket when spawn happened).
+    pub callback_address: PathBuf,
+}
+
+/// Manages the Pod's runtime directory on tmpfs.
+///
+/// ```text
+/// $XDG_RUNTIME_DIR/insomnia/{pod_name}/
+/// ├── pid
+/// ├── status.json
+/// ├── manifest.toml
+/// ├── history.json
+/// └── sock             (created by socket listener, not by RuntimeDir)
+/// ```
+///
+/// Files are written atomically (write tmp → rename).
+/// The directory is removed on drop.
+pub struct RuntimeDir {
+    path: PathBuf,
+}
+
+impl RuntimeDir {
+    /// Create the runtime directory and write the PID file.
+    pub async fn create(base: &Path, pod_name: &str) -> Result<Self, io::Error> {
+        let path = base.join(pod_name);
+        fs::create_dir_all(&path).await?;
+
+        let pid = std::process::id().to_string();
+        fs::write(path.join("pid"), pid.as_bytes()).await?;
+
+        Ok(Self { path })
+    }
+
+    /// Create in the default base directory.
+    ///
+    /// Uses `$XDG_RUNTIME_DIR/insomnia/` if available,
+    /// otherwise falls back to `~/.insomnia/run/`.
+    pub async fn create_default(pod_name: &str) -> Result<Self, io::Error> {
+        let base = default_base()?;
+        Self::create(&base, pod_name).await
+    }
+
+    /// Write status.json atomically.
+    pub async fn write_status(&self, state: &PodSharedState) -> Result<(), io::Error> {
+        let content = state.status_json();
+        atomic_write(&self.path.join("status.json"), content.as_bytes()).await
+    }
+
+    /// Write manifest.toml (typically once at startup).
+    pub async fn write_manifest(&self, toml: &str) -> Result<(), io::Error> {
+        atomic_write(&self.path.join("manifest.toml"), toml.as_bytes()).await
+    }
+
+    /// Write history.json atomically.
+    pub async fn write_history(&self, state: &PodSharedState) -> Result<(), io::Error> {
+        let content = state.history_json();
+        atomic_write(&self.path.join("history.json"), content.as_bytes()).await
+    }
+
+    /// Write `spawned_pods.json` atomically. The entries are the full
+    /// set of spawned children known to this Pod — callers pass the
+    /// replacement list, no incremental merge.
+    pub async fn write_spawned_pods(
+        &self,
+        records: &[SpawnedPodRecord],
+    ) -> Result<(), io::Error> {
+        let json = serde_json::to_vec_pretty(records).map_err(io::Error::other)?;
+        atomic_write(&self.path.join("spawned_pods.json"), &json).await
+    }
+
+    /// Path to this Pod's runtime directory.
+    pub fn path(&self) -> &Path {
+        &self.path
+    }
+
+    /// Path where the Unix socket should be created.
+    pub fn socket_path(&self) -> PathBuf {
+        self.path.join("sock")
+    }
+}
+
+impl Drop for RuntimeDir {
+    fn drop(&mut self) {
+        let _ = std::fs::remove_dir_all(&self.path);
+    }
+}
+
+/// Atomic write: write to a temp file, then rename.
+async fn atomic_write(target: &Path, content: &[u8]) -> Result<(), io::Error> {
+    let tmp = target.with_extension("tmp");
+    fs::write(&tmp, content).await?;
+    fs::rename(&tmp, target).await?;
+    Ok(())
+}
+
+/// Resolve the default base directory for runtime data.
+///
+/// Public so the scope-lock registry (which lives outside the
+/// `RuntimeDir` instance lifecycle) can predict a Pod's socket path
+/// without constructing a `RuntimeDir` first.
+pub fn default_base() -> Result<PathBuf, io::Error> {
+    if let Ok(runtime_dir) = std::env::var("XDG_RUNTIME_DIR") {
+        Ok(PathBuf::from(runtime_dir).join("insomnia"))
+    } else if let Ok(home) = std::env::var("HOME") {
+        Ok(PathBuf::from(home).join(".insomnia").join("run"))
+    } else {
+        Err(io::Error::new(
+            io::ErrorKind::NotFound,
+            "neither XDG_RUNTIME_DIR nor HOME is set",
+        ))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::shared_state::{PodSharedState, PodStatus};
+
+    fn test_state() -> PodSharedState {
+        PodSharedState::new(
+            "test-pod".into(),
+            session_store::new_session_id(),
+            "[pod]\nname = \"test-pod\"".into(),
+            protocol::Greeting {
+                pod_name: "test-pod".into(),
+                cwd: "/tmp".into(),
+                provider: "anthropic".into(),
+                model: "claude".into(),
+                scope_summary: String::new(),
+                tools: Vec::new(),
+            },
+        )
+    }
+
+    #[tokio::test]
+    async fn creates_directory_and_pid() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+
+        assert!(rt.path().join("pid").exists());
+        let pid = std::fs::read_to_string(rt.path().join("pid")).unwrap();
+        assert_eq!(pid, std::process::id().to_string());
+    }
+
+    #[tokio::test]
+    async fn write_status_creates_file() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+        let state = test_state();
+
+        rt.write_status(&state).await.unwrap();
+
+        let content = std::fs::read_to_string(rt.path().join("status.json")).unwrap();
+        let parsed: serde_json::Value = serde_json::from_str(&content).unwrap();
+        assert_eq!(parsed["state"], "idle");
+        assert_eq!(parsed["pod_name"], "test-pod");
+    }
+
+    #[tokio::test]
+    async fn write_status_reflects_changes() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+        let state = test_state();
+
+        state.set_status(PodStatus::Running);
+        rt.write_status(&state).await.unwrap();
+
+        let content = std::fs::read_to_string(rt.path().join("status.json")).unwrap();
+        let parsed: serde_json::Value = serde_json::from_str(&content).unwrap();
+        assert_eq!(parsed["state"], "running");
+    }
+
+    #[tokio::test]
+    async fn write_manifest_creates_file() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+
+        rt.write_manifest("[pod]\nname = \"test\"").await.unwrap();
+
+        let content = std::fs::read_to_string(rt.path().join("manifest.toml")).unwrap();
+        assert_eq!(content, "[pod]\nname = \"test\"");
+    }
+
+    #[tokio::test]
+    async fn write_spawned_pods_creates_file() {
+        use manifest::{Permission, ScopeRule};
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+
+        let records = vec![SpawnedPodRecord {
+            pod_name: "child".into(),
+            socket_path: "/run/insomnia/child/sock".into(),
+            scope_delegated: vec![ScopeRule {
+                target: "/tmp/work".into(),
+                permission: Permission::Write,
+                recursive: true,
+            }],
+            callback_address: "/run/insomnia/my-pod/sock".into(),
+        }];
+        rt.write_spawned_pods(&records).await.unwrap();
+
+        let content = std::fs::read_to_string(rt.path().join("spawned_pods.json")).unwrap();
+        let parsed: Vec<SpawnedPodRecord> = serde_json::from_str(&content).unwrap();
+        assert_eq!(parsed.len(), 1);
+        assert_eq!(parsed[0].pod_name, "child");
+    }
+
+    #[tokio::test]
+    async fn write_history_creates_file() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+        let state = test_state();
+
+        rt.write_history(&state).await.unwrap();
+
+        let content = std::fs::read_to_string(rt.path().join("history.json")).unwrap();
+        assert_eq!(content, "[]");
+    }
+
+    #[tokio::test]
+    async fn socket_path() {
+        let tmp = tempfile::tempdir().unwrap();
+        let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+        assert_eq!(rt.socket_path(), rt.path().join("sock"));
+    }
+
+    #[tokio::test]
+    async fn drop_removes_directory() {
+        let tmp = tempfile::tempdir().unwrap();
+        let dir_path;
+        {
+            let rt = RuntimeDir::create(tmp.path(), "my-pod").await.unwrap();
+            dir_path = rt.path().to_owned();
+            assert!(dir_path.exists());
+        }
+        assert!(!dir_path.exists());
+    }
+}

crates/pod/src/runtime/mod.rs

@@ -0,0 +1,2 @@
+pub mod dir;
+pub mod scope_lock;