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