OXYGENHUB
# 3b1dc8a974a3 oxygen / crates / oxy-core / src / repo / config.rs
9.3 KiB · Rust · last changed Unbound hosted repositories adopt the first pusher's id 1 month ago source blame history raw
1 
//! Layered configuration: defaults, the user file, the repository file.
2
3 
use super::*;
4
5 
/// Effective settings: defaults, then the user file (`~/.config/oxy/config.toml`,
6 
/// spec §19), then the repository file (`.oxy/config`). Both files are
7 
/// `key = "value"` lines. `save` writes only the repository layer.
8 
#[derive(Clone, Debug, PartialEq, Eq)]
9 
pub struct Config {
10 
    /// Keys set in the repository file (or via `set`), written by `save`.
11 
    repo_layer: BTreeMap<String, String>,
12 
    pub author_name: String,
13 
    pub author_email: String,
14 
    /// The KeyId of the author's identity, once `create_identity` has run.
15 
    pub author_key: Option<KeyId>,
16 
    /// `core.sign`: sign every change at commit (`true`) or leave signing to
17 
    /// push-time seals (`false`, the spec default).
18 
    pub sign_changes: bool,
19 
    pub bookmark: String,
20 
    /// `remote.<name>.url`.
21 
    pub remotes: BTreeMap<String, String>,
22 
    /// `remote.<name>.token`: bearer token for HTTP pushes.
23 
    pub remote_tokens: BTreeMap<String, String>,
24 
    /// `remote.<name>.ca`: PEM file of extra roots to trust for that remote.
25 
    pub remote_cas: BTreeMap<String, String>,
26 
    /// `core.op-retention`: days for which operations keep their states reachable (spec §12.1, §21).
27 
    pub op_retention_days: u64,
28 
    /// `core.gc-grace`: days an unreachable object survives, protecting concurrent writers (spec §21).
29 
    pub gc_grace_days: u64,
30 
    /// `core.checkpoint-interval`: changes between automatic checkpoints (spec §11).
31 
    pub checkpoint_interval: u64,
32 
    /// `filter.max-blob`: blobs larger than this many bytes are fetched lazily (spec §17).
33 
    pub max_blob: Option<u64>,
34 
    /// `filter.paths`: only these subtrees are materialized (spec §17); empty means everything.
35 
    pub sparse_paths: Vec<String>,
36 
    /// `hooks.semantic-deps`: run the semantic-deps hook at commit (spec §20).
37 
    pub semantic_deps: bool,
38 
}
39
40 
impl Config {
41 
    pub(super) fn default_for_user() -> Config {
42 
        let user = std::env::var("USER").unwrap_or_else(|_| "unknown".into());
43 
        Config {
44 
            repo_layer: BTreeMap::new(),
45 
            author_name: std::env::var("OXY_AUTHOR_NAME").unwrap_or_else(|_| user.clone()),
46 
            author_email: std::env::var("OXY_AUTHOR_EMAIL")
47 
                .unwrap_or_else(|_| format!("{user}@localhost")),
48 
            author_key: None,
49 
            sign_changes: false,
50 
            bookmark: "main".into(),
51 
            remotes: BTreeMap::new(),
52 
            remote_tokens: BTreeMap::new(),
53 
            remote_cas: BTreeMap::new(),
54 
            op_retention_days: 90,
55 
            gc_grace_days: 14,
56 
            checkpoint_interval: 256,
57 
            max_blob: None,
58 
            sparse_paths: Vec::new(),
59 
            semantic_deps: false,
60 
        }
61 
    }
62
63 
    /// Set a key in the repository layer, as `oxy config` does.
64 
    pub fn set(&mut self, key: &str, value: &str) -> Result<()> {
65 
        self.apply(key, value)?;
66 
        if value.is_empty() {
67 
            self.repo_layer.remove(key);
68 
        } else {
69 
            self.repo_layer.insert(key.to_string(), value.to_string());
70 
        }
71 
        Ok(())
72 
    }
73
74 
    /// Set a key in the user file without touching any repository.
75 
    pub fn set_user(user_path: &Path, key: &str, value: &str) -> Result<()> {
76 
        Config::default_for_user().apply(key, value)?;
77 
        let mut entries = read_config_file(user_path)?;
78 
        if value.is_empty() {
79 
            entries.remove(key);
80 
        } else {
81 
            entries.insert(key.to_string(), value.to_string());
82 
        }
83 
        if let Some(parent) = user_path.parent() {
84 
            fs::create_dir_all(parent)?;
85 
        }
86 
        write_config_file(user_path, &entries)
87 
    }
88
89 
    /// Apply a key to the effective values.
90 
    pub(super) fn apply(&mut self, key: &str, value: &str) -> Result<()> {
91 
        match key {
92 
            "author.name" => self.author_name = value.into(),
93 
            "author.email" => self.author_email = value.into(),
94 
            "author.key" => {
95 
                self.author_key = if value.is_empty() {
96 
                    None
97 
                } else {
98 
                    Some(KeyId::from_hex(value).ok_or_else(|| {
99 
                        RepoError::Msg("author.key must be a 64-character hex KeyId".into())
100 
                    })?)
101 
                }
102 
            }
103 
            "core.sign" => {
104 
                self.sign_changes = match value {
105 
                    "change" => true,
106 
                    "seal" => false,
107 
                    _ => return fail("core.sign must be \"change\" or \"seal\""),
108 
                }
109 
            }
110 
            "workspace.bookmark" => self.bookmark = value.into(),
111 
            "core.op-retention" => self.op_retention_days = parse_days(value)?,
112 
            "core.gc-grace" => self.gc_grace_days = parse_days(value)?,
113 
            "filter.max-blob" => {
114 
                self.max_blob = if value.is_empty() {
115 
                    None
116 
                } else {
117 
                    Some(parse_size(value)?)
118 
                }
119 
            }
120 
            "hooks.semantic-deps" => self.semantic_deps = matches!(value, "true" | "1" | "yes"),
121 
            "filter.paths" => {
122 
                self.sparse_paths = value
123 
                    .split(',')
124 
                    .map(|p| {
125 
                        p.trim()
126 
                            .trim_start_matches("./")
127 
                            .trim_matches('/')
128 
                            .to_string()
129 
                    })
130 
                    .filter(|p| !p.is_empty())
131 
                    .collect();
132 
            }
133 
            "core.checkpoint-interval" => {
134 
                self.checkpoint_interval = value
135 
                    .parse()
136 
                    .map_err(|_| RepoError::Msg(format!("expected a number, got {value:?}")))?;
137 
            }
138 
            k if k.starts_with("remote.") => {
139 
                let rest = &k["remote.".len()..];
140 
                let Some((name, field)) = rest.rsplit_once('.') else {
141 
                    return fail(format!("unknown configuration key {key:?}"));
142 
                };
143 
                if name.is_empty() || name.contains('/') {
144 
                    return fail(format!("invalid remote name in {key:?}"));
145 
                }
146 
                let map = match field {
147 
                    "url" => &mut self.remotes,
148 
                    "token" => &mut self.remote_tokens,
149 
                    "ca" => &mut self.remote_cas,
150 
                    _ => return fail(format!("unknown configuration key {key:?}")),
151 
                };
152 
                if value.is_empty() {
153 
                    map.remove(name);
154 
                    if field == "url" {
155 
                        self.remote_tokens.remove(name);
156 
                        self.remote_cas.remove(name);
157 
                    }
158 
                } else {
159 
                    map.insert(name.to_string(), value.into());
160 
                }
161 
            }
162 
            _ => return fail(format!("unknown configuration key {key:?}")),
163 
        }
164 
        Ok(())
165 
    }
166
167 
    /// Defaults, then the user file if it exists, then the repository file.
168 
    pub(super) fn load(user_path: Option<&Path>, repo_path: &Path) -> Result<Config> {
169 
        let mut c = Config::default_for_user();
170 
        if let Some(u) = user_path {
171 
            for (k, v) in read_config_file(u)? {
172 
                let _ = c.apply(&k, &v);
173 
            }
174 
        }
175 
        for (k, v) in read_config_file(repo_path)? {
176 
            if c.apply(&k, &v).is_ok() {
177 
                c.repo_layer.insert(k, v);
178 
            }
179 
        }
180 
        Ok(c)
181 
    }
182
183 
    pub(super) fn save(&self, path: &Path) -> Result<()> {
184 
        write_config_file(path, &self.repo_layer)
185 
    }
186
187 
    /// Keys explicitly set for this repository.
188 
    pub fn repo_layer(&self) -> &BTreeMap<String, String> {
189 
        &self.repo_layer
190 
    }
191 
}
192
193 
/// A byte count with an optional `K`, `M`, or `G` suffix (binary units).
194 
pub fn parse_size(v: &str) -> Result<u64> {
195 
    let v = v.trim();
196 
    let (num, mult) = match v.chars().last() {
197 
        Some('K' | 'k') => (&v[..v.len() - 1], 1u64 << 10),
198 
        Some('M' | 'm') => (&v[..v.len() - 1], 1u64 << 20),
199 
        Some('G' | 'g') => (&v[..v.len() - 1], 1u64 << 30),
200 
        _ => (v, 1),
201 
    };
202 
    let n: u64 = num
203 
        .trim()
204 
        .parse()
205 
        .map_err(|_| RepoError::Msg(format!("expected a size like 1M, got {v:?}")))?;
206 
    Ok(n * mult)
207 
}
208
209 
/// A count of days, optionally suffixed `d`.
210 
fn parse_days(v: &str) -> Result<u64> {
211 
    v.trim_end_matches('d')
212 
        .parse()
213 
        .map_err(|_| RepoError::Msg(format!("expected a number of days, got {v:?}")))
214 
}
215
216 
/// Read `key = "value"` lines; a missing file is empty.
217 
pub fn read_config_file(path: &Path) -> Result<BTreeMap<String, String>> {
218 
    let text = match fs::read_to_string(path) {
219 
        Ok(t) => t,
220 
        Err(e) if e.kind() == std::io::ErrorKind::NotFound => return Ok(BTreeMap::new()),
221 
        Err(e) => return Err(e.into()),
222 
    };
223 
    let mut out = BTreeMap::new();
224 
    for line in text.lines() {
225 
        let line = line.trim();
226 
        if line.is_empty() || line.starts_with('#') {
227 
            continue;
228 
        }
229 
        let Some((k, v)) = line.split_once('=') else {
230 
            continue;
231 
        };
232 
        out.insert(k.trim().to_string(), v.trim().trim_matches('"').to_string());
233 
    }
234 
    Ok(out)
235 
}
236
237 
fn write_config_file(path: &Path, entries: &BTreeMap<String, String>) -> Result<()> {
238 
    let text: String = entries
239 
        .iter()
240 
        .map(|(k, v)| format!("{k} = \"{v}\"\n"))
241 
        .collect();
242 
    write_atomic(path, text.as_bytes())
243 
}