crates/hub/src/config.rs at 32d97df55ab7 · andymccall/oxygenhub

# 32d97df55ab7 oxygenhub / crates / hub / src / config.rs

12.6 KiB · Rust · last changed feat: keyless GCS backups, and TEST (closes #169) 22 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,
}

/// 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,
}

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(),
        }
    }
}

/// 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,
}

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

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(),
        }
    }
}

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

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