looop 0.13.0

A tiny, portable, Kubernetes-shaped control loop for your work
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

//! `looop status [--json]` — a one-shot STRUCTURED probe of the loop's live
//! state (observability layer 2). An external observer (e.g. an AI watching the
//! loop) reads this instead of scraping the human-pretty stdout. Pure read over
//! the data dir + lock + `babysit ls`; no daemon.

use crate::config::Config;
use crate::paths::Paths;
use crate::{session, util};
use anyhow::Result;
use std::fs;
use std::process::ExitCode;

fn cost_today(paths: &Paths) -> f64 {
    let today = chrono::Local::now().format("%Y-%m-%d").to_string();
    fs::read_to_string(paths.cost_ledger())
        .unwrap_or_default()
        .lines()
        .filter_map(|l| serde_json::from_str::<serde_json::Value>(l).ok())
        .filter(|r| {
            r.get("ts")
                .and_then(|t| t.as_str())
                .and_then(|ts| chrono::DateTime::parse_from_rfc3339(ts).ok())
                .map(|dt| {
                    dt.with_timezone(&chrono::Local)
                        .format("%Y-%m-%d")
                        .to_string()
                        == today
                })
                .unwrap_or(false)
        })
        .filter_map(|r| r.get("cost_usd").and_then(|c| c.as_f64()))
        .sum::<f64>()
        + 0.0 // normalize -0.0 -> 0.0
}

fn build(paths: &Paths) -> serde_json::Value {
    let lock = paths.lock();
    let pid = fs::read_to_string(lock.join("pid")).unwrap_or_default();
    let pid = pid.trim().to_string();
    let running = lock.is_dir() && util::pid_alive(&pid);

    let idle = Config::load(paths)
        .ok()
        .and_then(|c| {
            c.root
                .get("interval")
                .and_then(|v| v.as_u64().or_else(|| v.as_f64().map(|f| f as u64)))
        })
        .unwrap_or(60);

    let hash_file = paths.data_dir.join(".last-tick-hash");
    let last_hash = fs::read_to_string(&hash_file)
        .unwrap_or_default()
        .trim()
        .to_string();
    let last_at = fs::metadata(&hash_file)
        .and_then(|m| m.modified())
        .ok()
        .and_then(|t| t.duration_since(std::time::UNIX_EPOCH).ok())
        .map(|d| {
            chrono::DateTime::<chrono::Utc>::from_timestamp(d.as_secs() as i64, 0)
                .map(|dt| dt.to_rfc3339())
                .unwrap_or_default()
        });

    let workers: Vec<serde_json::Value> = session::list_workers(paths)
        .into_iter()
        .map(|s| {
            serde_json::json!({
                "id": s.id,
                "state": s.state,
                "alive": s.alive,
                "exit_code": s.exit_code,
                "flagged": s.flagged(),
                "note": s.note,
            })
        })
        .collect();

    serde_json::json!({
        "pulse": { "running": running, "pid": pid, "interval_s": idle },
        "last_tick": { "at": last_at, "hash": last_hash },
        "workers": workers,
        "cost_today_usd": cost_today(paths),
        "data_dir": paths.data_dir.to_string_lossy(),
    })
}

pub fn cmd_status(paths: &Paths, args: &[String]) -> Result<ExitCode> {
    let s = build(paths);
    if args.iter().any(|a| a == "--json") {
        println!("{}", serde_json::to_string_pretty(&s)?);
        return Ok(ExitCode::SUCCESS);
    }

    // Human summary.
    let pulse = &s["pulse"];
    let running = pulse["running"].as_bool().unwrap_or(false);
    println!(
        "pulse:    {}",
        if running {
            format!("running (pid {})", pulse["pid"].as_str().unwrap_or("?"))
        } else {
            "stopped".into()
        }
    );
    println!(
        "last tick: {}  (hash {})",
        s["last_tick"]["at"].as_str().unwrap_or("never"),
        {
            let h = s["last_tick"]["hash"].as_str().unwrap_or("");
            if h.is_empty() { "—" } else { h }
        }
    );
    let workers = s["workers"].as_array().cloned().unwrap_or_default();
    println!("workers:  {}", workers.len());
    for w in &workers {
        let flag = if w["flagged"].as_bool().unwrap_or(false) {
            format!("  ⚑ {}", w["note"].as_str().unwrap_or(""))
        } else {
            String::new()
        };
        println!(
            "  - {} [{}]{}",
            w["id"].as_str().unwrap_or("?"),
            w["state"].as_str().unwrap_or("?"),
            flag
        );
    }
    println!(
        "cost today: ${:.4}",
        s["cost_today_usd"].as_f64().unwrap_or(0.0)
    );
    Ok(ExitCode::SUCCESS)
}