crates/hub/src/config.rs at 4e2cad00a484 · andymccall/oxygenhub

# 4e2cad00a484 oxygenhub / crates / hub / src / config.rs

14.4 KiB · Rust · last changed Postgres, step 3: the hub builds and passes its tests on PostgreSQL 19 days ago source blame history raw

//! Configuration (hub spec §17.1): `hub.toml` in the data directory, every
//! key overridable by `OXYHUB_<SECTION>_<KEY>`.

use serde::Deserialize;
use std::net::SocketAddr;
use std::path::{Path, PathBuf};

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Config {
    /// Set from the command line, never from the file.
    #[serde(skip)]
    pub data: PathBuf,
    pub site: Site,
    pub server: Server,
    pub tls: Tls,
    pub auth: Auth,
    pub registration: Registration,
    pub email: Email,
    pub limits: Limits,
    pub retention: Retention,
    pub flow: Flow,
    pub apt: Apt,
    pub diffusion: Diffusion,
    pub backups: Backups,
    pub outbound: Outbound,
    pub database: Database,
}

/// Where a hub built with the `postgres` feature keeps its tables (#211); a
/// SQLite build keeps them in `<data>/hub.db` and ignores this.
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Database {
    /// `postgres://user@host/db`; the password from the URL or `PGPASSWORD`.
    pub url: String,
    /// The schema to use, made if missing; empty for `public`, `*` for one
    /// per data directory (named after it), as the tests use.
    pub schema: String,
}

/// Outbound requests to addresses people give (oxygenhub#219): private
/// and local addresses are refused unless listed here, as `scheme://host`
/// (any port) or `scheme://host:port`, e.g. a local Ollama:
/// `allow = ["http://127.0.0.1:11434"]`.
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Outbound {
    pub allow: Vec<String>,
}

/// Backups (docs/backups.md, oxygenhub#169): the directories on this host
/// an owner may back up to. Empty, only GCS destinations can be chosen.
#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Backups {
    pub directories: Vec<PathBuf>,
    /// Google's token exchange and Cloud Storage, for GCS destinations;
    /// set only to point them elsewhere (tests, a private endpoint).
    pub sts_url: String,
    pub storage_url: String,
    /// AWS STS and S3, for S3 destinations; `{bucket}` and `{region}` in
    /// `s3_url` are filled in. Set only to point them elsewhere.
    pub aws_sts_url: String,
    pub s3_url: String,
}

impl Default for Backups {
    fn default() -> Self {
        Backups {
            directories: Vec::new(),
            sts_url: "https://sts.googleapis.com".into(),
            storage_url: "https://storage.googleapis.com".into(),
            aws_sts_url: "https://sts.amazonaws.com".into(),
            s3_url: "https://{bucket}.s3.{region}.amazonaws.com".into(),
        }
    }
}

/// Diffusion (#148, docs/diffusion.md §4.2): the site's default for
/// repositories that say nothing.
#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Diffusion {
    /// `off`, `green` or `any`.
    pub follow: String,
}

impl Default for Diffusion {
    fn default() -> Self {
        Diffusion { follow: "off".into() }
    }
}

/// The apt repository at `/apt` (oxygenhub#85): the `.deb` assets of these
/// public repositories' releases, signed with the key in `gnupg_home`.
#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Apt {
    /// `owner/name` of each repository whose release `.deb`s are served;
    /// none turns `/apt` off.
    pub repos: Vec<String>,
    /// The suite apt's `sources` names.
    pub suite: String,
    pub component: String,
    /// GnuPG home holding the signing key (relative to the data directory).
    pub gnupg_home: String,
    /// Architectures the index lists, each with its Packages file.
    pub architectures: Vec<String>,
}

impl Default for Apt {
    fn default() -> Self {
        Apt {
            repos: vec![],
            suite: "stable".into(),
            component: "main".into(),
            gnupg_home: "apt-gnupg".into(),
            architectures: vec!["amd64".into(), "arm64".into(), "riscv64".into()],
        }
    }
}

/// OxygenFlow runs (hub spec §13.2).
#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Flow {
    /// Bearer tokens runners present to claim jobs.
    pub runner_tokens: Vec<String>,
    /// `owner/*` or `owner/name`: repositories whose pushes start runs.
    pub repos: Vec<String>,
    pub job_timeout_minutes: u64,
    /// A runner whose last this many jobs all ended in an infrastructure
    /// error (status `error`, not `failed`) is drained and the
    /// administrators told (oxygenflow#30); 0 never drains one.
    pub drain_after_errors: u32,
}

impl Default for Flow {
    fn default() -> Self {
        Flow { runner_tokens: vec![], repos: vec![], job_timeout_minutes: 60, drain_after_errors: 5 }
    }
}

impl Flow {
    /// Whether pushes to `owner/name` start runs.
    pub fn allows(&self, owner: &str, name: &str) -> bool {
        self.repos.iter().any(|p| match p.split_once('/') {
            Some((o, "*")) => o == owner,
            Some((o, n)) => o == owner && n == name,
            None => false,
        })
    }
}

#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Email {
    /// `smtp://user:pass@host:port` or `smtps://…`; empty disables email.
    pub smtp: String,
    /// `OxygenHub <hub@example>`.
    pub from: String,
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Registration {
    /// `open`, `invite` or `closed`; the admin page can override it.
    pub mode: String,
}

impl Default for Registration {
    fn default() -> Self {
        Registration { mode: "invite".into() }
    }
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Site {
    pub name: String,
    pub description: String,
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Server {
    /// Plain HTTP; empty disables it.
    pub bind: String,
    /// HTTPS; empty disables it. Needs `tls`.
    pub tls_bind: String,
    /// What links and clone URLs start with.
    pub base_url: String,
    /// Trust `X-Forwarded-*` from a terminating proxy.
    pub behind_proxy: bool,
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Tls {
    /// Generate a certificate at `init` (developer edition).
    pub self_signed: bool,
    /// PEM files; relative paths are under the data directory.
    pub cert: String,
    pub key: String,
}

#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Auth {
    /// Bearer tokens allowed to push until accounts exist (hub 0.2). Empty
    /// means every push is accepted, as `oxy serve` does.
    pub push_tokens: Vec<String>,
    /// For tests only: a base URL that stands in for every sign-in
    /// provider (`{base}/{provider}/authorize|token|userinfo`).
    pub signin_mock: Option<String>,
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Limits {
    /// Largest file rendered in the browser, e.g. `2MiB`.
    pub render_limit: ByteSize,
    pub asset_limit: ByteSize,
    pub push_body_limit: ByteSize,
}

#[derive(Clone, Debug, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Retention {
    pub trash_days: u32,
    pub webhook_log_days: u32,
    /// The UTC hour at which every repository is garbage collected
    /// (spec §17.2); 24 or more turns the nightly gc off.
    pub gc_hour: u32,
}

/// A byte count written as `512`, `2MiB`, `4GiB`, `100kB`.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct ByteSize(pub u64);

impl ByteSize {
    pub fn parse(s: &str) -> Option<ByteSize> {
        let s = s.trim();
        let digits: String = s.chars().take_while(|c| c.is_ascii_digit()).collect();
        let unit = s[digits.len()..].trim();
        let n: u64 = digits.parse().ok()?;
        let mult = match unit {
            "" | "B" => 1,
            "k" | "kB" | "KB" => 1000,
            "KiB" | "K" => 1 << 10,
            "M" | "MB" => 1_000_000,
            "MiB" => 1 << 20,
            "G" | "GB" => 1_000_000_000,
            "GiB" => 1 << 30,
            _ => return None,
        };
        Some(ByteSize(n.checked_mul(mult)?))
    }
}

impl<'de> Deserialize<'de> for ByteSize {
    fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<ByteSize, D::Error> {
        #[derive(Deserialize)]
        #[serde(untagged)]
        enum Raw {
            Number(u64),
            Text(String),
        }
        match Raw::deserialize(d)? {
            Raw::Number(n) => Ok(ByteSize(n)),
            Raw::Text(t) => ByteSize::parse(&t).ok_or_else(|| serde::de::Error::custom(format!("not a byte size: {t:?}"))),
        }
    }
}

impl Default for Site {
    fn default() -> Self {
        Site { name: "OxygenHub".into(), description: "Repositories, proposals and issues for Oxygen".into() }
    }
}

impl Default for Server {
    fn default() -> Self {
        Server { bind: "127.0.0.1:7300".into(), tls_bind: String::new(), base_url: "http://127.0.0.1:7300".into(), behind_proxy: false }
    }
}

impl Default for Tls {
    fn default() -> Self {
        Tls { self_signed: false, cert: "keys/tls.crt".into(), key: "keys/tls.key".into() }
    }
}

impl Default for Limits {
    fn default() -> Self {
        Limits { render_limit: ByteSize(2 << 20), asset_limit: ByteSize(512 << 20), push_body_limit: ByteSize(4 << 30) }
    }
}

impl Default for Retention {
    fn default() -> Self {
        Retention { trash_days: 30, webhook_log_days: 30, gc_hour: 3 }
    }
}

impl Default for Config {
    fn default() -> Self {
        Config {
            data: PathBuf::from("data"),
            site: Site::default(),
            server: Server::default(),
            tls: Tls::default(),
            auth: Auth::default(),
            registration: Registration::default(),
            email: Email::default(),
            limits: Limits::default(),
            retention: Retention::default(),
            flow: Flow::default(),
            apt: Apt::default(),
            diffusion: Diffusion::default(),
            backups: Backups::default(),
            outbound: Outbound::default(),
            database: Database::default(),
        }
    }
}

impl Config {
    /// Read `<data>/hub.toml` if present, then apply environment overrides.
    pub fn load(data: &Path) -> anyhow::Result<Config> {
        let path = data.join("hub.toml");
        let mut cfg = match std::fs::read_to_string(&path) {
            Ok(text) => Config::parse(&text)?,
            Err(e) if e.kind() == std::io::ErrorKind::NotFound => Config::default(),
            Err(e) => return Err(anyhow::anyhow!("reading {}: {e}", path.display())),
        };
        cfg.data = data.to_path_buf();
        cfg.apply_env(|k| std::env::var(k).ok());
        Ok(cfg)
    }

    pub fn parse(text: &str) -> anyhow::Result<Config> {
        Ok(toml::from_str(text)?)
    }

    /// `OXYHUB_SERVER_BIND`, `OXYHUB_SITE_NAME`, … override the file.
    pub fn apply_env(&mut self, get: impl Fn(&str) -> Option<String>) {
        if let Some(v) = get("OXYHUB_DATABASE_URL") {
            self.database.url = v;
        }
        if let Some(v) = get("OXYHUB_DATABASE_SCHEMA") {
            self.database.schema = v;
        }
        if let Some(v) = get("OXYHUB_SITE_NAME") {
            self.site.name = v;
        }
        if let Some(v) = get("OXYHUB_SITE_DESCRIPTION") {
            self.site.description = v;
        }
        if let Some(v) = get("OXYHUB_SERVER_BIND") {
            self.server.bind = v;
        }
        if let Some(v) = get("OXYHUB_SERVER_TLS_BIND") {
            self.server.tls_bind = v;
        }
        if let Some(v) = get("OXYHUB_SERVER_BASE_URL") {
            self.server.base_url = v;
        }
        if let Some(v) = get("OXYHUB_SERVER_BEHIND_PROXY") {
            self.server.behind_proxy = matches!(v.as_str(), "1" | "true" | "yes");
        }
        if let Some(v) = get("OXYHUB_TLS_SELF_SIGNED") {
            self.tls.self_signed = matches!(v.as_str(), "1" | "true" | "yes");
        }
        if let Some(v) = get("OXYHUB_REGISTRATION_MODE") {
            self.registration.mode = v;
        }
        if let Some(v) = get("OXYHUB_AUTH_PUSH_TOKENS") {
            self.auth.push_tokens = v.split(',').map(str::trim).filter(|s| !s.is_empty()).map(String::from).collect();
        }
        if let Some(v) = get("OXYHUB_LIMITS_RENDER_LIMIT").and_then(|v| ByteSize::parse(&v)) {
            self.limits.render_limit = v;
        }
    }

    pub fn bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
        parse_addr(&self.server.bind)
    }

    pub fn tls_bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
        parse_addr(&self.server.tls_bind)
    }

    pub fn tls_cert(&self) -> PathBuf {
        self.data.join(&self.tls.cert)
    }

    pub fn tls_key(&self) -> PathBuf {
        self.data.join(&self.tls.key)
    }

    pub fn repos_dir(&self) -> PathBuf {
        self.data.join("repos")
    }

    pub fn keys_dir(&self) -> PathBuf {
        self.data.join("keys")
    }

    pub fn db_path(&self) -> PathBuf {
        self.data.join("hub.db")
    }

    /// The base URL without a trailing slash.
    pub fn base_url(&self) -> &str {
        self.server.base_url.trim_end_matches('/')
    }
}

fn parse_addr(s: &str) -> anyhow::Result<Option<SocketAddr>> {
    if s.trim().is_empty() {
        return Ok(None);
    }
    Ok(Some(s.parse().map_err(|e| anyhow::anyhow!("bind address {s:?}: {e}"))?))
}

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

    #[test]
    fn byte_sizes() {
        assert_eq!(ByteSize::parse("2MiB"), Some(ByteSize(2 << 20)));
        assert_eq!(ByteSize::parse("512"), Some(ByteSize(512)));
        assert_eq!(ByteSize::parse("4 GiB"), Some(ByteSize(4 << 30)));
        assert_eq!(ByteSize::parse("100kB"), Some(ByteSize(100_000)));
        assert_eq!(ByteSize::parse("lots"), None);
    }

    #[test]
    fn file_then_environment() {
        let mut cfg = Config::parse("[server]\nbind = \"0.0.0.0:7300\"\n[limits]\nrender_limit = \"1MiB\"\n").unwrap();
        assert_eq!(cfg.server.bind, "0.0.0.0:7300");
        assert_eq!(cfg.limits.render_limit, ByteSize(1 << 20));
        assert_eq!(cfg.site.name, "OxygenHub");
        cfg.apply_env(|k| match k {
            "OXYHUB_SITE_NAME" => Some("Earth".into()),
            "OXYHUB_AUTH_PUSH_TOKENS" => Some("a, b".into()),
            _ => None,
        });
        assert_eq!(cfg.site.name, "Earth");
        assert_eq!(cfg.auth.push_tokens, ["a", "b"]);
        assert!(Config::parse("[nope]\nx = 1\n").is_err(), "unknown sections are errors, not silence");
    }
}

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1	//! Configuration (hub spec §17.1): `hub.toml` in the data directory, every
2	//! key overridable by `OXYHUB_<SECTION>_<KEY>`.
3
4	use serde::Deserialize;
5	use std::net::SocketAddr;
6	use std::path::{Path, PathBuf};
7
8	#[derive(Clone, Debug, Deserialize)]
9	#[serde(default, deny_unknown_fields)]
10	pub struct Config {
11	/// Set from the command line, never from the file.
12	#[serde(skip)]
13	pub data: PathBuf,
14	pub site: Site,
15	pub server: Server,
16	pub tls: Tls,
17	pub auth: Auth,
18	pub registration: Registration,
19	pub email: Email,
20	pub limits: Limits,
21	pub retention: Retention,
22	pub flow: Flow,
23	pub apt: Apt,
24	pub diffusion: Diffusion,
25	pub backups: Backups,
26	pub outbound: Outbound,
27	pub database: Database,
28	}
29
30	/// Where a hub built with the `postgres` feature keeps its tables (#211); a
31	/// SQLite build keeps them in `<data>/hub.db` and ignores this.
32	#[derive(Clone, Debug, Default, Deserialize)]
33	#[serde(default, deny_unknown_fields)]
34	pub struct Database {
35	/// `postgres://user@host/db`; the password from the URL or `PGPASSWORD`.
36	pub url: String,
37	/// The schema to use, made if missing; empty for `public`, `*` for one
38	/// per data directory (named after it), as the tests use.
39	pub schema: String,
40	}
41
42	/// Outbound requests to addresses people give (oxygenhub#219): private
43	/// and local addresses are refused unless listed here, as `scheme://host`
44	/// (any port) or `scheme://host:port`, e.g. a local Ollama:
45	/// `allow = ["http://127.0.0.1:11434"]`.
46	#[derive(Clone, Debug, Default, Deserialize)]
47	#[serde(default, deny_unknown_fields)]
48	pub struct Outbound {
49	pub allow: Vec<String>,
50	}
51
52	/// Backups (docs/backups.md, oxygenhub#169): the directories on this host
53	/// an owner may back up to. Empty, only GCS destinations can be chosen.
54	#[derive(Clone, Debug, Deserialize)]
55	#[serde(default, deny_unknown_fields)]
56	pub struct Backups {
57	pub directories: Vec<PathBuf>,
58	/// Google's token exchange and Cloud Storage, for GCS destinations;
59	/// set only to point them elsewhere (tests, a private endpoint).
60	pub sts_url: String,
61	pub storage_url: String,
62	/// AWS STS and S3, for S3 destinations; `{bucket}` and `{region}` in
63	/// `s3_url` are filled in. Set only to point them elsewhere.
64	pub aws_sts_url: String,
65	pub s3_url: String,
66	}
67
68	impl Default for Backups {
69	fn default() -> Self {
70	Backups {
71	directories: Vec::new(),
72	sts_url: "https://sts.googleapis.com".into(),
73	storage_url: "https://storage.googleapis.com".into(),
74	aws_sts_url: "https://sts.amazonaws.com".into(),
75	s3_url: "https://{bucket}.s3.{region}.amazonaws.com".into(),
76	}
77	}
78	}
79
80	/// Diffusion (#148, docs/diffusion.md §4.2): the site's default for
81	/// repositories that say nothing.
82	#[derive(Clone, Debug, Deserialize)]
83	#[serde(default, deny_unknown_fields)]
84	pub struct Diffusion {
85	/// `off`, `green` or `any`.
86	pub follow: String,
87	}
88
89	impl Default for Diffusion {
90	fn default() -> Self {
91	Diffusion { follow: "off".into() }
92	}
93	}
94
95	/// The apt repository at `/apt` (oxygenhub#85): the `.deb` assets of these
96	/// public repositories' releases, signed with the key in `gnupg_home`.
97	#[derive(Clone, Debug, Deserialize)]
98	#[serde(default, deny_unknown_fields)]
99	pub struct Apt {
100	/// `owner/name` of each repository whose release `.deb`s are served;
101	/// none turns `/apt` off.
102	pub repos: Vec<String>,
103	/// The suite apt's `sources` names.
104	pub suite: String,
105	pub component: String,
106	/// GnuPG home holding the signing key (relative to the data directory).
107	pub gnupg_home: String,
108	/// Architectures the index lists, each with its Packages file.
109	pub architectures: Vec<String>,
110	}
111
112	impl Default for Apt {
113	fn default() -> Self {
114	Apt {
115	repos: vec![],
116	suite: "stable".into(),
117	component: "main".into(),
118	gnupg_home: "apt-gnupg".into(),
119	architectures: vec!["amd64".into(), "arm64".into(), "riscv64".into()],
120	}
121	}
122	}
123
124	/// OxygenFlow runs (hub spec §13.2).
125	#[derive(Clone, Debug, Deserialize)]
126	#[serde(default, deny_unknown_fields)]
127	pub struct Flow {
128	/// Bearer tokens runners present to claim jobs.
129	pub runner_tokens: Vec<String>,
130	/// `owner/*` or `owner/name`: repositories whose pushes start runs.
131	pub repos: Vec<String>,
132	pub job_timeout_minutes: u64,
133	/// A runner whose last this many jobs all ended in an infrastructure
134	/// error (status `error`, not `failed`) is drained and the
135	/// administrators told (oxygenflow#30); 0 never drains one.
136	pub drain_after_errors: u32,
137	}
138
139	impl Default for Flow {
140	fn default() -> Self {
141	Flow { runner_tokens: vec![], repos: vec![], job_timeout_minutes: 60, drain_after_errors: 5 }
142	}
143	}
144
145	impl Flow {
146	/// Whether pushes to `owner/name` start runs.
147	pub fn allows(&self, owner: &str, name: &str) -> bool {
148	self.repos.iter().any(\|p\| match p.split_once('/') {
149	Some((o, "*")) => o == owner,
150	Some((o, n)) => o == owner && n == name,
151	None => false,
152	})
153	}
154	}
155
156	#[derive(Clone, Debug, Default, Deserialize)]
157	#[serde(default, deny_unknown_fields)]
158	pub struct Email {
159	/// `smtp://user:pass@host:port` or `smtps://…`; empty disables email.
160	pub smtp: String,
161	/// `OxygenHub <hub@example>`.
162	pub from: String,
163	}
164
165	#[derive(Clone, Debug, Deserialize)]
166	#[serde(default, deny_unknown_fields)]
167	pub struct Registration {
168	/// `open`, `invite` or `closed`; the admin page can override it.
169	pub mode: String,
170	}
171
172	impl Default for Registration {
173	fn default() -> Self {
174	Registration { mode: "invite".into() }
175	}
176	}
177
178	#[derive(Clone, Debug, Deserialize)]
179	#[serde(default, deny_unknown_fields)]
180	pub struct Site {
181	pub name: String,
182	pub description: String,
183	}
184
185	#[derive(Clone, Debug, Deserialize)]
186	#[serde(default, deny_unknown_fields)]
187	pub struct Server {
188	/// Plain HTTP; empty disables it.
189	pub bind: String,
190	/// HTTPS; empty disables it. Needs `tls`.
191	pub tls_bind: String,
192	/// What links and clone URLs start with.
193	pub base_url: String,
194	/// Trust `X-Forwarded-*` from a terminating proxy.
195	pub behind_proxy: bool,
196	}
197
198	#[derive(Clone, Debug, Deserialize)]
199	#[serde(default, deny_unknown_fields)]
200	pub struct Tls {
201	/// Generate a certificate at `init` (developer edition).
202	pub self_signed: bool,
203	/// PEM files; relative paths are under the data directory.
204	pub cert: String,
205	pub key: String,
206	}
207
208	#[derive(Clone, Debug, Default, Deserialize)]
209	#[serde(default, deny_unknown_fields)]
210	pub struct Auth {
211	/// Bearer tokens allowed to push until accounts exist (hub 0.2). Empty
212	/// means every push is accepted, as `oxy serve` does.
213	pub push_tokens: Vec<String>,
214	/// For tests only: a base URL that stands in for every sign-in
215	/// provider (`{base}/{provider}/authorize\|token\|userinfo`).
216	pub signin_mock: Option<String>,
217	}
218
219	#[derive(Clone, Debug, Deserialize)]
220	#[serde(default, deny_unknown_fields)]
221	pub struct Limits {
222	/// Largest file rendered in the browser, e.g. `2MiB`.
223	pub render_limit: ByteSize,
224	pub asset_limit: ByteSize,
225	pub push_body_limit: ByteSize,
226	}
227
228	#[derive(Clone, Debug, Deserialize)]
229	#[serde(default, deny_unknown_fields)]
230	pub struct Retention {
231	pub trash_days: u32,
232	pub webhook_log_days: u32,
233	/// The UTC hour at which every repository is garbage collected
234	/// (spec §17.2); 24 or more turns the nightly gc off.
235	pub gc_hour: u32,
236	}
237
238	/// A byte count written as `512`, `2MiB`, `4GiB`, `100kB`.
239	#[derive(Clone, Copy, Debug, PartialEq, Eq)]
240	pub struct ByteSize(pub u64);
241
242	impl ByteSize {
243	pub fn parse(s: &str) -> Option<ByteSize> {
244	let s = s.trim();
245	let digits: String = s.chars().take_while(\|c\| c.is_ascii_digit()).collect();
246	let unit = s[digits.len()..].trim();
247	let n: u64 = digits.parse().ok()?;
248	let mult = match unit {
249	"" \| "B" => 1,
250	"k" \| "kB" \| "KB" => 1000,
251	"KiB" \| "K" => 1 << 10,
252	"M" \| "MB" => 1_000_000,
253	"MiB" => 1 << 20,
254	"G" \| "GB" => 1_000_000_000,
255	"GiB" => 1 << 30,
256	_ => return None,
257	};
258	Some(ByteSize(n.checked_mul(mult)?))
259	}
260	}
261
262	impl<'de> Deserialize<'de> for ByteSize {
263	fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<ByteSize, D::Error> {
264	#[derive(Deserialize)]
265	#[serde(untagged)]
266	enum Raw {
267	Number(u64),
268	Text(String),
269	}
270	match Raw::deserialize(d)? {
271	Raw::Number(n) => Ok(ByteSize(n)),
272	Raw::Text(t) => ByteSize::parse(&t).ok_or_else(\|\| serde::de::Error::custom(format!("not a byte size: {t:?}"))),
273	}
274	}
275	}
276
277	impl Default for Site {
278	fn default() -> Self {
279	Site { name: "OxygenHub".into(), description: "Repositories, proposals and issues for Oxygen".into() }
280	}
281	}
282
283	impl Default for Server {
284	fn default() -> Self {
285	Server { bind: "127.0.0.1:7300".into(), tls_bind: String::new(), base_url: "http://127.0.0.1:7300".into(), behind_proxy: false }
286	}
287	}
288
289	impl Default for Tls {
290	fn default() -> Self {
291	Tls { self_signed: false, cert: "keys/tls.crt".into(), key: "keys/tls.key".into() }
292	}
293	}
294
295	impl Default for Limits {
296	fn default() -> Self {
297	Limits { render_limit: ByteSize(2 << 20), asset_limit: ByteSize(512 << 20), push_body_limit: ByteSize(4 << 30) }
298	}
299	}
300
301	impl Default for Retention {
302	fn default() -> Self {
303	Retention { trash_days: 30, webhook_log_days: 30, gc_hour: 3 }
304	}
305	}
306
307	impl Default for Config {
308	fn default() -> Self {
309	Config {
310	data: PathBuf::from("data"),
311	site: Site::default(),
312	server: Server::default(),
313	tls: Tls::default(),
314	auth: Auth::default(),
315	registration: Registration::default(),
316	email: Email::default(),
317	limits: Limits::default(),
318	retention: Retention::default(),
319	flow: Flow::default(),
320	apt: Apt::default(),
321	diffusion: Diffusion::default(),
322	backups: Backups::default(),
323	outbound: Outbound::default(),
324	database: Database::default(),
325	}
326	}
327	}
328
329	impl Config {
330	/// Read `<data>/hub.toml` if present, then apply environment overrides.
331	pub fn load(data: &Path) -> anyhow::Result<Config> {
332	let path = data.join("hub.toml");
333	let mut cfg = match std::fs::read_to_string(&path) {
334	Ok(text) => Config::parse(&text)?,
335	Err(e) if e.kind() == std::io::ErrorKind::NotFound => Config::default(),
336	Err(e) => return Err(anyhow::anyhow!("reading {}: {e}", path.display())),
337	};
338	cfg.data = data.to_path_buf();
339	cfg.apply_env(\|k\| std::env::var(k).ok());
340	Ok(cfg)
341	}
342
343	pub fn parse(text: &str) -> anyhow::Result<Config> {
344	Ok(toml::from_str(text)?)
345	}
346
347	/// `OXYHUB_SERVER_BIND`, `OXYHUB_SITE_NAME`, … override the file.
348	pub fn apply_env(&mut self, get: impl Fn(&str) -> Option<String>) {
349	if let Some(v) = get("OXYHUB_DATABASE_URL") {
350	self.database.url = v;
351	}
352	if let Some(v) = get("OXYHUB_DATABASE_SCHEMA") {
353	self.database.schema = v;
354	}
355	if let Some(v) = get("OXYHUB_SITE_NAME") {
356	self.site.name = v;
357	}
358	if let Some(v) = get("OXYHUB_SITE_DESCRIPTION") {
359	self.site.description = v;
360	}
361	if let Some(v) = get("OXYHUB_SERVER_BIND") {
362	self.server.bind = v;
363	}
364	if let Some(v) = get("OXYHUB_SERVER_TLS_BIND") {
365	self.server.tls_bind = v;
366	}
367	if let Some(v) = get("OXYHUB_SERVER_BASE_URL") {
368	self.server.base_url = v;
369	}
370	if let Some(v) = get("OXYHUB_SERVER_BEHIND_PROXY") {
371	self.server.behind_proxy = matches!(v.as_str(), "1" \| "true" \| "yes");
372	}
373	if let Some(v) = get("OXYHUB_TLS_SELF_SIGNED") {
374	self.tls.self_signed = matches!(v.as_str(), "1" \| "true" \| "yes");
375	}
376	if let Some(v) = get("OXYHUB_REGISTRATION_MODE") {
377	self.registration.mode = v;
378	}
379	if let Some(v) = get("OXYHUB_AUTH_PUSH_TOKENS") {
380	self.auth.push_tokens = v.split(',').map(str::trim).filter(\|s\| !s.is_empty()).map(String::from).collect();
381	}
382	if let Some(v) = get("OXYHUB_LIMITS_RENDER_LIMIT").and_then(\|v\| ByteSize::parse(&v)) {
383	self.limits.render_limit = v;
384	}
385	}
386
387	pub fn bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
388	parse_addr(&self.server.bind)
389	}
390
391	pub fn tls_bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
392	parse_addr(&self.server.tls_bind)
393	}
394
395	pub fn tls_cert(&self) -> PathBuf {
396	self.data.join(&self.tls.cert)
397	}
398
399	pub fn tls_key(&self) -> PathBuf {
400	self.data.join(&self.tls.key)
401	}
402
403	pub fn repos_dir(&self) -> PathBuf {
404	self.data.join("repos")
405	}
406
407	pub fn keys_dir(&self) -> PathBuf {
408	self.data.join("keys")
409	}
410
411	pub fn db_path(&self) -> PathBuf {
412	self.data.join("hub.db")
413	}
414
415	/// The base URL without a trailing slash.
416	pub fn base_url(&self) -> &str {
417	self.server.base_url.trim_end_matches('/')
418	}
419	}
420
421	fn parse_addr(s: &str) -> anyhow::Result<Option<SocketAddr>> {
422	if s.trim().is_empty() {
423	return Ok(None);
424	}
425	Ok(Some(s.parse().map_err(\|e\| anyhow::anyhow!("bind address {s:?}: {e}"))?))
426	}
427
428	#[cfg(test)]
429	mod tests {
430	use super::*;
431
432	#[test]
433	fn byte_sizes() {
434	assert_eq!(ByteSize::parse("2MiB"), Some(ByteSize(2 << 20)));
435	assert_eq!(ByteSize::parse("512"), Some(ByteSize(512)));
436	assert_eq!(ByteSize::parse("4 GiB"), Some(ByteSize(4 << 30)));
437	assert_eq!(ByteSize::parse("100kB"), Some(ByteSize(100_000)));
438	assert_eq!(ByteSize::parse("lots"), None);
439	}
440
441	#[test]
442	fn file_then_environment() {
443	let mut cfg = Config::parse("[server]\nbind = \"0.0.0.0:7300\"\n[limits]\nrender_limit = \"1MiB\"\n").unwrap();
444	assert_eq!(cfg.server.bind, "0.0.0.0:7300");
445	assert_eq!(cfg.limits.render_limit, ByteSize(1 << 20));
446	assert_eq!(cfg.site.name, "OxygenHub");
447	cfg.apply_env(\|k\| match k {
448	"OXYHUB_SITE_NAME" => Some("Earth".into()),
449	"OXYHUB_AUTH_PUSH_TOKENS" => Some("a, b".into()),
450	_ => None,
451	});
452	assert_eq!(cfg.site.name, "Earth");
453	assert_eq!(cfg.auth.push_tokens, ["a", "b"]);
454	assert!(Config::parse("[nope]\nx = 1\n").is_err(), "unknown sections are errors, not silence");
455	}
456	}

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