aft/bash_background/
mod.rs

1//! Background bash task management. Phase 0 stub; Phase 1 Track D fills in.
2
3pub mod buffer;
4pub mod persistence;
5pub mod process;
6pub mod registry;
7pub mod watchdog;
8
9use crate::context::AppContext;
10use crate::protocol::Response;
11use serde::{Deserialize, Serialize};
12use serde_json::json;
13use std::collections::HashMap;
14use std::path::PathBuf;
15use std::time::Duration;
16
17pub use registry::{BgCompletion, BgTaskRegistry};
18
19#[derive(Debug, Clone, Serialize, Deserialize)]
20pub struct BgTaskInfo {
21    pub task_id: String,
22    pub status: BgTaskStatus,
23    pub command: String,
24    pub started_at: u64,
25    pub duration_ms: Option<u64>,
26}
27
28#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
29#[serde(rename_all = "snake_case")]
30pub enum BgTaskStatus {
31    Starting,
32    Running,
33    Killing,
34    Completed,
35    Failed,
36    Killed,
37    TimedOut,
38}
39
40impl BgTaskStatus {
41    pub fn is_terminal(&self) -> bool {
42        matches!(
43            self,
44            BgTaskStatus::Completed
45                | BgTaskStatus::Failed
46                | BgTaskStatus::Killed
47                | BgTaskStatus::TimedOut
48        )
49    }
50}
51
52/// Spawn a bash command in the background. Returns a task_id immediately.
53pub fn spawn(
54    request_id: &str,
55    session_id: &str,
56    command: &str,
57    workdir: Option<PathBuf>,
58    env: Option<HashMap<String, String>>,
59    timeout_ms: Option<u64>,
60    ctx: &AppContext,
61) -> Response {
62    if !ctx.config().experimental_bash_background {
63        return Response::error(
64            request_id,
65            "feature_disabled",
66            "background bash is disabled; set experimental_bash_background=true",
67        );
68    }
69
70    #[cfg(windows)]
71    {
72        return Response::error(
73            request_id,
74            "unsupported_platform",
75            "background bash is not yet supported on Windows",
76        );
77    }
78
79    let workdir = workdir.unwrap_or_else(|| {
80        ctx.config().project_root.clone().unwrap_or_else(|| {
81            std::env::current_dir().unwrap_or_else(|_| std::path::PathBuf::from("."))
82        })
83    });
84    let storage_dir = storage_dir(ctx.config().storage_dir.as_deref());
85    let max_running = ctx.config().max_background_bash_tasks;
86    let timeout = timeout_ms.map(Duration::from_millis);
87
88    match ctx.bash_background().spawn(
89        command,
90        session_id.to_string(),
91        workdir,
92        env.unwrap_or_default(),
93        timeout,
94        storage_dir,
95        max_running,
96    ) {
97        Ok(task_id) => Response::success(
98            request_id,
99            json!({
100                "task_id": task_id,
101                "status": BgTaskStatus::Running,
102            }),
103        ),
104        Err(message) if message.contains("limit exceeded") => {
105            Response::error(request_id, "background_task_limit_exceeded", message)
106        }
107        Err(message) => Response::error(request_id, "execution_failed", message),
108    }
109}
110
111pub fn storage_dir(configured: Option<&std::path::Path>) -> PathBuf {
112    if let Some(dir) = configured {
113        return dir.to_path_buf();
114    }
115    if let Some(dir) = std::env::var_os("AFT_CACHE_DIR") {
116        return PathBuf::from(dir).join("aft");
117    }
118    let home = std::env::var_os("HOME")
119        .map(PathBuf::from)
120        .unwrap_or_else(|| PathBuf::from("."));
121    home.join(".cache").join("aft")
122}
aft/bash_background/mod.rs

aft/bash_background/
mod.rs
