niuse 0.1.7

A personal engineering companion built on niucode
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

//! Defaults from `~/.niuse/config.toml`.
//!
//! Precedence is CLI flag → config file → built-in. The file is optional; an
//! absent file is not an error and an unreadable one is.

use anyhow::{Context, Result};
use niuse_core::Store;
use serde::Deserialize;

use crate::Cli;

pub const TEMPLATE: &str = "\
# niuse defaults. CLI flags override these; built-ins are the fallback.
[defaults]
# provider = \"deepseek\"
# model = \"deepseek-flash\"
# sandbox = \"workspace-write\"   # read-only | workspace-write | full-access
# approval = \"on-failure\"       # ask | on-failure | never
# network = \"off\"               # on | off
# max_steps = 0                 # 0 = no hard cap
";

#[derive(Debug, Default, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct FileConfig {
    #[serde(default)]
    pub defaults: Defaults,
}

#[derive(Debug, Default, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct Defaults {
    pub provider: Option<String>,
    pub model: Option<String>,
    pub sandbox: Option<String>,
    pub approval: Option<String>,
    pub network: Option<String>,
    pub max_steps: Option<usize>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Settings {
    pub provider: String,
    pub model: Option<String>,
    pub sandbox: String,
    pub approval: String,
    pub network: String,
    pub max_steps: usize,
}

pub fn load(store: &Store) -> Result<FileConfig> {
    match store.read_config()? {
        Some(text) => toml::from_str(&text)
            .with_context(|| format!("parse {}", store.config_path().display())),
        None => Ok(FileConfig::default()),
    }
}

pub fn resolve(cli: &Cli, store: &Store) -> Result<Settings> {
    let file = load(store)?;
    Ok(Settings {
        provider: pick(
            cli.preset.clone(),
            file.defaults.provider,
            "deepseek".to_string(),
        ),
        model: cli.model.clone().or(file.defaults.model),
        sandbox: pick(
            cli.sandbox.clone(),
            file.defaults.sandbox,
            "workspace-write".to_string(),
        ),
        approval: pick(
            cli.approval.clone(),
            file.defaults.approval,
            "on-failure".to_string(),
        ),
        network: pick(
            cli.network.clone(),
            file.defaults.network,
            "off".to_string(),
        ),
        max_steps: cli.max_steps.or(file.defaults.max_steps).unwrap_or(0),
    })
}

fn pick(cli: Option<String>, file: Option<String>, built_in: String) -> String {
    cli.or(file).unwrap_or(built_in)
}

pub fn init(store: &Store, force: bool) -> Result<bool> {
    let path = store.config_path();
    if path.exists() && !force {
        return Ok(false);
    }
    store.write_config(TEMPLATE)?;
    Ok(true)
}

pub fn show(store: &Store) -> Result<()> {
    let path = store.config_path();
    println!("{}", path.display());
    match store.read_config()? {
        Some(text) => print!("{text}"),
        None => println!("(missing; using built-in defaults)"),
    }
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn parses_defaults() {
        let file: FileConfig = toml::from_str(
            r#"
[defaults]
provider = "openai"
sandbox = "read-only"
max_steps = 4
"#,
        )
        .unwrap();
        assert_eq!(file.defaults.provider.as_deref(), Some("openai"));
        assert_eq!(file.defaults.sandbox.as_deref(), Some("read-only"));
        assert_eq!(file.defaults.max_steps, Some(4));
        assert_eq!(file.defaults.approval, None);
    }

    #[test]
    fn cli_beats_file_beats_builtin() {
        assert_eq!(
            pick(Some("cli".into()), Some("file".into()), "builtin".into()),
            "cli"
        );
        assert_eq!(pick(None, Some("file".into()), "builtin".into()), "file");
        assert_eq!(pick(None, None, "builtin".into()), "builtin");
    }

    #[test]
    fn unknown_keys_are_rejected() {
        assert!(toml::from_str::<FileConfig>("[defaults]\nprovder = \"deepseek\"\n").is_err());
        assert!(toml::from_str::<FileConfig>("typo = 1\n").is_err());
    }

    #[test]
    fn empty_file_is_valid() {
        let file: FileConfig = toml::from_str("").unwrap();
        assert_eq!(file.defaults.provider, None);
    }
}