crates/hub/src/config.rs at 8f0efa0729b0 · andymccall/oxygenhub

# 8f0efa0729b0 oxygenhub / crates / hub / src / config.rs

13.7 KiB · Rust · last changed Outbound requests only to public addresses 20 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,
}

/// 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(),
        }
    }
}

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

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