crates/hub/src/config.rs at 16ee5d19d220 · andymccall/oxygenhub

# 16ee5d19d220 oxygenhub / crates / hub / src / config.rs

15.8 KiB · Rust · last changed Hubs witness each other's transparency logs (step A5) 18 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,
    pub tlog: Tlog,
}

/// 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>,
}

/// The transparency log's witnesses (docs/transparency.md, #238): who
/// cosigns this hub's checkpoints, and whose logs this hub cosigns.
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct Tlog {
    pub witnesses: Vec<TlogWitness>,
    pub witness_for: Vec<TlogWitnessed>,
}

/// A witness this hub's log asks: its name in cosignatures, its
/// add-checkpoint address (`https://HUB/log/witness/add-checkpoint` for
/// another hub), and its identity object in base64 (another hub's
/// `/.well-known/oxyhub-key`).
#[derive(Clone, Debug, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct TlogWitness {
    pub name: String,
    pub url: String,
    pub key: String,
}

/// A log this hub witnesses: its origin (`HOST/log`) and its key, an
/// identity object in base64.
#[derive(Clone, Debug, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct TlogWitnessed {
    pub origin: String,
    pub key: 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,
    /// The setup code the first account must bring (oxygenhub#245), for
    /// automation; empty, the hub makes one and keeps it in
    /// `<data>/setup-code`.
    pub setup_code: String,
}

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

#[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(),
            tlog: Tlog::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_REGISTRATION_SETUP_CODE") {
            self.registration.setup_code = 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	pub tlog: Tlog,
29	}
30
31	/// Where a hub built with the `postgres` feature keeps its tables (#211); a
32	/// SQLite build keeps them in `<data>/hub.db` and ignores this.
33	#[derive(Clone, Debug, Default, Deserialize)]
34	#[serde(default, deny_unknown_fields)]
35	pub struct Database {
36	/// `postgres://user@host/db`; the password from the URL or `PGPASSWORD`.
37	pub url: String,
38	/// The schema to use, made if missing; empty for `public`, `*` for one
39	/// per data directory (named after it), as the tests use.
40	pub schema: String,
41	}
42
43	/// Outbound requests to addresses people give (oxygenhub#219): private
44	/// and local addresses are refused unless listed here, as `scheme://host`
45	/// (any port) or `scheme://host:port`, e.g. a local Ollama:
46	/// `allow = ["http://127.0.0.1:11434"]`.
47	#[derive(Clone, Debug, Default, Deserialize)]
48	#[serde(default, deny_unknown_fields)]
49	pub struct Outbound {
50	pub allow: Vec<String>,
51	}
52
53	/// The transparency log's witnesses (docs/transparency.md, #238): who
54	/// cosigns this hub's checkpoints, and whose logs this hub cosigns.
55	#[derive(Clone, Debug, Default, Deserialize)]
56	#[serde(default, deny_unknown_fields)]
57	pub struct Tlog {
58	pub witnesses: Vec<TlogWitness>,
59	pub witness_for: Vec<TlogWitnessed>,
60	}
61
62	/// A witness this hub's log asks: its name in cosignatures, its
63	/// add-checkpoint address (`https://HUB/log/witness/add-checkpoint` for
64	/// another hub), and its identity object in base64 (another hub's
65	/// `/.well-known/oxyhub-key`).
66	#[derive(Clone, Debug, Deserialize)]
67	#[serde(deny_unknown_fields)]
68	pub struct TlogWitness {
69	pub name: String,
70	pub url: String,
71	pub key: String,
72	}
73
74	/// A log this hub witnesses: its origin (`HOST/log`) and its key, an
75	/// identity object in base64.
76	#[derive(Clone, Debug, Deserialize)]
77	#[serde(deny_unknown_fields)]
78	pub struct TlogWitnessed {
79	pub origin: String,
80	pub key: String,
81	}
82
83	/// Backups (docs/backups.md, oxygenhub#169): the directories on this host
84	/// an owner may back up to. Empty, only GCS destinations can be chosen.
85	#[derive(Clone, Debug, Deserialize)]
86	#[serde(default, deny_unknown_fields)]
87	pub struct Backups {
88	pub directories: Vec<PathBuf>,
89	/// Google's token exchange and Cloud Storage, for GCS destinations;
90	/// set only to point them elsewhere (tests, a private endpoint).
91	pub sts_url: String,
92	pub storage_url: String,
93	/// AWS STS and S3, for S3 destinations; `{bucket}` and `{region}` in
94	/// `s3_url` are filled in. Set only to point them elsewhere.
95	pub aws_sts_url: String,
96	pub s3_url: String,
97	}
98
99	impl Default for Backups {
100	fn default() -> Self {
101	Backups {
102	directories: Vec::new(),
103	sts_url: "https://sts.googleapis.com".into(),
104	storage_url: "https://storage.googleapis.com".into(),
105	aws_sts_url: "https://sts.amazonaws.com".into(),
106	s3_url: "https://{bucket}.s3.{region}.amazonaws.com".into(),
107	}
108	}
109	}
110
111	/// Diffusion (#148, docs/diffusion.md §4.2): the site's default for
112	/// repositories that say nothing.
113	#[derive(Clone, Debug, Deserialize)]
114	#[serde(default, deny_unknown_fields)]
115	pub struct Diffusion {
116	/// `off`, `green` or `any`.
117	pub follow: String,
118	}
119
120	impl Default for Diffusion {
121	fn default() -> Self {
122	Diffusion { follow: "off".into() }
123	}
124	}
125
126	/// The apt repository at `/apt` (oxygenhub#85): the `.deb` assets of these
127	/// public repositories' releases, signed with the key in `gnupg_home`.
128	#[derive(Clone, Debug, Deserialize)]
129	#[serde(default, deny_unknown_fields)]
130	pub struct Apt {
131	/// `owner/name` of each repository whose release `.deb`s are served;
132	/// none turns `/apt` off.
133	pub repos: Vec<String>,
134	/// The suite apt's `sources` names.
135	pub suite: String,
136	pub component: String,
137	/// GnuPG home holding the signing key (relative to the data directory).
138	pub gnupg_home: String,
139	/// Architectures the index lists, each with its Packages file.
140	pub architectures: Vec<String>,
141	}
142
143	impl Default for Apt {
144	fn default() -> Self {
145	Apt {
146	repos: vec![],
147	suite: "stable".into(),
148	component: "main".into(),
149	gnupg_home: "apt-gnupg".into(),
150	architectures: vec!["amd64".into(), "arm64".into(), "riscv64".into()],
151	}
152	}
153	}
154
155	/// OxygenFlow runs (hub spec §13.2).
156	#[derive(Clone, Debug, Deserialize)]
157	#[serde(default, deny_unknown_fields)]
158	pub struct Flow {
159	/// Bearer tokens runners present to claim jobs.
160	pub runner_tokens: Vec<String>,
161	/// `owner/*` or `owner/name`: repositories whose pushes start runs.
162	pub repos: Vec<String>,
163	pub job_timeout_minutes: u64,
164	/// A runner whose last this many jobs all ended in an infrastructure
165	/// error (status `error`, not `failed`) is drained and the
166	/// administrators told (oxygenflow#30); 0 never drains one.
167	pub drain_after_errors: u32,
168	}
169
170	impl Default for Flow {
171	fn default() -> Self {
172	Flow { runner_tokens: vec![], repos: vec![], job_timeout_minutes: 60, drain_after_errors: 5 }
173	}
174	}
175
176	impl Flow {
177	/// Whether pushes to `owner/name` start runs.
178	pub fn allows(&self, owner: &str, name: &str) -> bool {
179	self.repos.iter().any(\|p\| match p.split_once('/') {
180	Some((o, "*")) => o == owner,
181	Some((o, n)) => o == owner && n == name,
182	None => false,
183	})
184	}
185	}
186
187	#[derive(Clone, Debug, Default, Deserialize)]
188	#[serde(default, deny_unknown_fields)]
189	pub struct Email {
190	/// `smtp://user:pass@host:port` or `smtps://…`; empty disables email.
191	pub smtp: String,
192	/// `OxygenHub <hub@example>`.
193	pub from: String,
194	}
195
196	#[derive(Clone, Debug, Deserialize)]
197	#[serde(default, deny_unknown_fields)]
198	pub struct Registration {
199	/// `open`, `invite` or `closed`; the admin page can override it.
200	pub mode: String,
201	/// The setup code the first account must bring (oxygenhub#245), for
202	/// automation; empty, the hub makes one and keeps it in
203	/// `<data>/setup-code`.
204	pub setup_code: String,
205	}
206
207	impl Default for Registration {
208	fn default() -> Self {
209	Registration { mode: "invite".into(), setup_code: String::new() }
210	}
211	}
212
213	#[derive(Clone, Debug, Deserialize)]
214	#[serde(default, deny_unknown_fields)]
215	pub struct Site {
216	pub name: String,
217	pub description: String,
218	}
219
220	#[derive(Clone, Debug, Deserialize)]
221	#[serde(default, deny_unknown_fields)]
222	pub struct Server {
223	/// Plain HTTP; empty disables it.
224	pub bind: String,
225	/// HTTPS; empty disables it. Needs `tls`.
226	pub tls_bind: String,
227	/// What links and clone URLs start with.
228	pub base_url: String,
229	/// Trust `X-Forwarded-*` from a terminating proxy.
230	pub behind_proxy: bool,
231	}
232
233	#[derive(Clone, Debug, Deserialize)]
234	#[serde(default, deny_unknown_fields)]
235	pub struct Tls {
236	/// Generate a certificate at `init` (developer edition).
237	pub self_signed: bool,
238	/// PEM files; relative paths are under the data directory.
239	pub cert: String,
240	pub key: String,
241	}
242
243	#[derive(Clone, Debug, Default, Deserialize)]
244	#[serde(default, deny_unknown_fields)]
245	pub struct Auth {
246	/// Bearer tokens allowed to push until accounts exist (hub 0.2). Empty
247	/// means every push is accepted, as `oxy serve` does.
248	pub push_tokens: Vec<String>,
249	/// For tests only: a base URL that stands in for every sign-in
250	/// provider (`{base}/{provider}/authorize\|token\|userinfo`).
251	pub signin_mock: Option<String>,
252	}
253
254	#[derive(Clone, Debug, Deserialize)]
255	#[serde(default, deny_unknown_fields)]
256	pub struct Limits {
257	/// Largest file rendered in the browser, e.g. `2MiB`.
258	pub render_limit: ByteSize,
259	pub asset_limit: ByteSize,
260	pub push_body_limit: ByteSize,
261	}
262
263	#[derive(Clone, Debug, Deserialize)]
264	#[serde(default, deny_unknown_fields)]
265	pub struct Retention {
266	pub trash_days: u32,
267	pub webhook_log_days: u32,
268	/// The UTC hour at which every repository is garbage collected
269	/// (spec §17.2); 24 or more turns the nightly gc off.
270	pub gc_hour: u32,
271	}
272
273	/// A byte count written as `512`, `2MiB`, `4GiB`, `100kB`.
274	#[derive(Clone, Copy, Debug, PartialEq, Eq)]
275	pub struct ByteSize(pub u64);
276
277	impl ByteSize {
278	pub fn parse(s: &str) -> Option<ByteSize> {
279	let s = s.trim();
280	let digits: String = s.chars().take_while(\|c\| c.is_ascii_digit()).collect();
281	let unit = s[digits.len()..].trim();
282	let n: u64 = digits.parse().ok()?;
283	let mult = match unit {
284	"" \| "B" => 1,
285	"k" \| "kB" \| "KB" => 1000,
286	"KiB" \| "K" => 1 << 10,
287	"M" \| "MB" => 1_000_000,
288	"MiB" => 1 << 20,
289	"G" \| "GB" => 1_000_000_000,
290	"GiB" => 1 << 30,
291	_ => return None,
292	};
293	Some(ByteSize(n.checked_mul(mult)?))
294	}
295	}
296
297	impl<'de> Deserialize<'de> for ByteSize {
298	fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<ByteSize, D::Error> {
299	#[derive(Deserialize)]
300	#[serde(untagged)]
301	enum Raw {
302	Number(u64),
303	Text(String),
304	}
305	match Raw::deserialize(d)? {
306	Raw::Number(n) => Ok(ByteSize(n)),
307	Raw::Text(t) => ByteSize::parse(&t).ok_or_else(\|\| serde::de::Error::custom(format!("not a byte size: {t:?}"))),
308	}
309	}
310	}
311
312	impl Default for Site {
313	fn default() -> Self {
314	Site { name: "OxygenHub".into(), description: "Repositories, proposals and issues for Oxygen".into() }
315	}
316	}
317
318	impl Default for Server {
319	fn default() -> Self {
320	Server { bind: "127.0.0.1:7300".into(), tls_bind: String::new(), base_url: "http://127.0.0.1:7300".into(), behind_proxy: false }
321	}
322	}
323
324	impl Default for Tls {
325	fn default() -> Self {
326	Tls { self_signed: false, cert: "keys/tls.crt".into(), key: "keys/tls.key".into() }
327	}
328	}
329
330	impl Default for Limits {
331	fn default() -> Self {
332	Limits { render_limit: ByteSize(2 << 20), asset_limit: ByteSize(512 << 20), push_body_limit: ByteSize(4 << 30) }
333	}
334	}
335
336	impl Default for Retention {
337	fn default() -> Self {
338	Retention { trash_days: 30, webhook_log_days: 30, gc_hour: 3 }
339	}
340	}
341
342	impl Default for Config {
343	fn default() -> Self {
344	Config {
345	data: PathBuf::from("data"),
346	site: Site::default(),
347	server: Server::default(),
348	tls: Tls::default(),
349	auth: Auth::default(),
350	registration: Registration::default(),
351	email: Email::default(),
352	limits: Limits::default(),
353	retention: Retention::default(),
354	flow: Flow::default(),
355	apt: Apt::default(),
356	diffusion: Diffusion::default(),
357	backups: Backups::default(),
358	outbound: Outbound::default(),
359	database: Database::default(),
360	tlog: Tlog::default(),
361	}
362	}
363	}
364
365	impl Config {
366	/// Read `<data>/hub.toml` if present, then apply environment overrides.
367	pub fn load(data: &Path) -> anyhow::Result<Config> {
368	let path = data.join("hub.toml");
369	let mut cfg = match std::fs::read_to_string(&path) {
370	Ok(text) => Config::parse(&text)?,
371	Err(e) if e.kind() == std::io::ErrorKind::NotFound => Config::default(),
372	Err(e) => return Err(anyhow::anyhow!("reading {}: {e}", path.display())),
373	};
374	cfg.data = data.to_path_buf();
375	cfg.apply_env(\|k\| std::env::var(k).ok());
376	Ok(cfg)
377	}
378
379	pub fn parse(text: &str) -> anyhow::Result<Config> {
380	Ok(toml::from_str(text)?)
381	}
382
383	/// `OXYHUB_SERVER_BIND`, `OXYHUB_SITE_NAME`, … override the file.
384	pub fn apply_env(&mut self, get: impl Fn(&str) -> Option<String>) {
385	if let Some(v) = get("OXYHUB_DATABASE_URL") {
386	self.database.url = v;
387	}
388	if let Some(v) = get("OXYHUB_DATABASE_SCHEMA") {
389	self.database.schema = v;
390	}
391	if let Some(v) = get("OXYHUB_SITE_NAME") {
392	self.site.name = v;
393	}
394	if let Some(v) = get("OXYHUB_SITE_DESCRIPTION") {
395	self.site.description = v;
396	}
397	if let Some(v) = get("OXYHUB_SERVER_BIND") {
398	self.server.bind = v;
399	}
400	if let Some(v) = get("OXYHUB_SERVER_TLS_BIND") {
401	self.server.tls_bind = v;
402	}
403	if let Some(v) = get("OXYHUB_SERVER_BASE_URL") {
404	self.server.base_url = v;
405	}
406	if let Some(v) = get("OXYHUB_SERVER_BEHIND_PROXY") {
407	self.server.behind_proxy = matches!(v.as_str(), "1" \| "true" \| "yes");
408	}
409	if let Some(v) = get("OXYHUB_TLS_SELF_SIGNED") {
410	self.tls.self_signed = matches!(v.as_str(), "1" \| "true" \| "yes");
411	}
412	if let Some(v) = get("OXYHUB_REGISTRATION_MODE") {
413	self.registration.mode = v;
414	}
415	if let Some(v) = get("OXYHUB_REGISTRATION_SETUP_CODE") {
416	self.registration.setup_code = v;
417	}
418	if let Some(v) = get("OXYHUB_AUTH_PUSH_TOKENS") {
419	self.auth.push_tokens = v.split(',').map(str::trim).filter(\|s\| !s.is_empty()).map(String::from).collect();
420	}
421	if let Some(v) = get("OXYHUB_LIMITS_RENDER_LIMIT").and_then(\|v\| ByteSize::parse(&v)) {
422	self.limits.render_limit = v;
423	}
424	}
425
426	pub fn bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
427	parse_addr(&self.server.bind)
428	}
429
430	pub fn tls_bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
431	parse_addr(&self.server.tls_bind)
432	}
433
434	pub fn tls_cert(&self) -> PathBuf {
435	self.data.join(&self.tls.cert)
436	}
437
438	pub fn tls_key(&self) -> PathBuf {
439	self.data.join(&self.tls.key)
440	}
441
442	pub fn repos_dir(&self) -> PathBuf {
443	self.data.join("repos")
444	}
445
446	pub fn keys_dir(&self) -> PathBuf {
447	self.data.join("keys")
448	}
449
450	pub fn db_path(&self) -> PathBuf {
451	self.data.join("hub.db")
452	}
453
454	/// The base URL without a trailing slash.
455	pub fn base_url(&self) -> &str {
456	self.server.base_url.trim_end_matches('/')
457	}
458	}
459
460	fn parse_addr(s: &str) -> anyhow::Result<Option<SocketAddr>> {
461	if s.trim().is_empty() {
462	return Ok(None);
463	}
464	Ok(Some(s.parse().map_err(\|e\| anyhow::anyhow!("bind address {s:?}: {e}"))?))
465	}
466
467	#[cfg(test)]
468	mod tests {
469	use super::*;
470
471	#[test]
472	fn byte_sizes() {
473	assert_eq!(ByteSize::parse("2MiB"), Some(ByteSize(2 << 20)));
474	assert_eq!(ByteSize::parse("512"), Some(ByteSize(512)));
475	assert_eq!(ByteSize::parse("4 GiB"), Some(ByteSize(4 << 30)));
476	assert_eq!(ByteSize::parse("100kB"), Some(ByteSize(100_000)));
477	assert_eq!(ByteSize::parse("lots"), None);
478	}
479
480	#[test]
481	fn file_then_environment() {
482	let mut cfg = Config::parse("[server]\nbind = \"0.0.0.0:7300\"\n[limits]\nrender_limit = \"1MiB\"\n").unwrap();
483	assert_eq!(cfg.server.bind, "0.0.0.0:7300");
484	assert_eq!(cfg.limits.render_limit, ByteSize(1 << 20));
485	assert_eq!(cfg.site.name, "OxygenHub");
486	cfg.apply_env(\|k\| match k {
487	"OXYHUB_SITE_NAME" => Some("Earth".into()),
488	"OXYHUB_AUTH_PUSH_TOKENS" => Some("a, b".into()),
489	_ => None,
490	});
491	assert_eq!(cfg.site.name, "Earth");
492	assert_eq!(cfg.auth.push_tokens, ["a", "b"]);
493	assert!(Config::parse("[nope]\nx = 1\n").is_err(), "unknown sections are errors, not silence");
494	}
495	}

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