balls 0.4.1

Git-native task tracker for parallel agent workflows
Documentation 
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

//! dep add/rm/tree and link add/rm commands. Split from `lifecycle.rs`
//! to keep both files well under the 300-line cap.

use super::discover;
use crate::cli::{DepCmd, LinkCmd};
use balls::display;
use balls::error::{BallError, Result};
use balls::ready;
use balls::store::{task_lock, Store};
use balls::task::{Link, LinkType};
use balls::tree;

pub fn cmd_dep(sub: DepCmd) -> Result<()> {
    let store = discover()?;
    match sub {
        DepCmd::Add { task, depends_on } => dep_add(&store, task, depends_on),
        DepCmd::Rm { task, depends_on } => dep_rm(&store, task, depends_on),
        DepCmd::Tree { id, json } => dep_tree(&store, id, json),
    }
}

fn dep_add(store: &Store, task: String, depends_on: String) -> Result<()> {
    let all = store.all_tasks()?;
    if !all.iter().any(|t| t.id == depends_on) {
        return Err(BallError::TaskNotFound(depends_on));
    }
    if ready::would_create_cycle(&all, &task, &depends_on) {
        return Err(BallError::Cycle(format!(
            "adding {task} -> {depends_on} would create a cycle"
        )));
    }
    {
        let _g = task_lock(store, &task)?;
        let mut t = store.load_task(&task)?;
        if !t.depends_on.contains(&depends_on) {
            t.depends_on.push(depends_on.clone());
            t.touch();
            store.save_task(&t)?;
            store.commit_task(
                &task,
                &format!("balls: dep add {task} -> {depends_on}"),
            )?;
        }
    }
    println!("{task} now depends on {depends_on}");
    Ok(())
}

fn dep_rm(store: &Store, task: String, depends_on: String) -> Result<()> {
    {
        let _g = task_lock(store, &task)?;
        let mut t = store.load_task(&task)?;
        let before = t.depends_on.len();
        t.depends_on.retain(|x| x != &depends_on);
        if t.depends_on.len() != before {
            t.touch();
            store.save_task(&t)?;
            store.commit_task(
                &task,
                &format!("balls: dep rm {task} -x {depends_on}"),
            )?;
        }
    }
    println!("{task} no longer depends on {depends_on}");
    Ok(())
}

fn dep_tree(store: &Store, id: Option<String>, json: bool) -> Result<()> {
    let tasks = store.all_tasks()?;
    let roots = if let Some(id) = id {
        let n = tree::rooted(&tasks, &id).ok_or(BallError::TaskNotFound(id))?;
        vec![n]
    } else {
        tree::forest(&tasks)
    };
    if json {
        let payload: Vec<tree::JsonNode> = roots.iter().map(tree::JsonNode::from_node).collect();
        println!("{}", serde_json::to_string_pretty(&payload)?);
    } else {
        print!("{}", tree::render_forest(&roots, &tasks, display::global()));
    }
    Ok(())
}

pub fn cmd_link(sub: LinkCmd) -> Result<()> {
    let store = discover()?;
    match sub {
        LinkCmd::Add { task, link_type, target } => link_add(&store, task, link_type, target),
        LinkCmd::Rm { task, link_type, target } => link_rm(&store, task, link_type, target),
    }
}

fn link_add(store: &Store, task: String, link_type: String, target: String) -> Result<()> {
    let lt = LinkType::parse(&link_type)?;
    let all = store.all_tasks()?;
    if !all.iter().any(|t| t.id == target) {
        return Err(BallError::TaskNotFound(target));
    }
    let lt_str = lt.as_str().to_string();
    let _g = task_lock(store, &task)?;
    let mut t = store.load_task(&task)?;
    let link = Link { link_type: lt, target: target.clone(), extra: std::collections::BTreeMap::new() };
    if !t.links.contains(&link) {
        t.links.push(link);
        t.touch();
        store.save_task(&t)?;
        store.commit_task(
            &task,
            &format!("balls: link {task} {lt_str} {target}"),
        )?;
    }
    println!("{task} {lt_str} {target}");
    Ok(())
}

fn link_rm(store: &Store, task: String, link_type: String, target: String) -> Result<()> {
    let lt = LinkType::parse(&link_type)?;
    let lt_str = lt.as_str().to_string();
    let _g = task_lock(store, &task)?;
    let mut t = store.load_task(&task)?;
    let link = Link { link_type: lt, target: target.clone(), extra: std::collections::BTreeMap::new() };
    let before = t.links.len();
    t.links.retain(|l| l != &link);
    if t.links.len() != before {
        t.touch();
        store.save_task(&t)?;
        store.commit_task(
            &task,
            &format!("balls: unlink {task} {lt_str} {target}"),
        )?;
    }
    println!("removed {task} {lt_str} {target}");
    Ok(())
}