crates/hub/src/config.rs at v0.3.1 · andymccall/oxygenhub

◆ v0.3.1 oxygenhub / crates / hub / src / config.rs

11.1 KiB · Rust · last changed Serve the releases' .debs as a signed apt repository at /apt 1 month 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,
}

/// 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>,
}

#[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,
}

/// 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 }
    }
}

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(),
        }
    }
}

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	}
25
26	/// The apt repository at `/apt` (oxygenhub#85): the `.deb` assets of these
27	/// public repositories' releases, signed with the key in `gnupg_home`.
28	#[derive(Clone, Debug, Deserialize)]
29	#[serde(default, deny_unknown_fields)]
30	pub struct Apt {
31	/// `owner/name` of each repository whose release `.deb`s are served;
32	/// none turns `/apt` off.
33	pub repos: Vec<String>,
34	/// The suite apt's `sources` names.
35	pub suite: String,
36	pub component: String,
37	/// GnuPG home holding the signing key (relative to the data directory).
38	pub gnupg_home: String,
39	/// Architectures the index lists, each with its Packages file.
40	pub architectures: Vec<String>,
41	}
42
43	impl Default for Apt {
44	fn default() -> Self {
45	Apt {
46	repos: vec![],
47	suite: "stable".into(),
48	component: "main".into(),
49	gnupg_home: "apt-gnupg".into(),
50	architectures: vec!["amd64".into(), "arm64".into(), "riscv64".into()],
51	}
52	}
53	}
54
55	/// OxygenFlow runs (hub spec §13.2).
56	#[derive(Clone, Debug, Deserialize)]
57	#[serde(default, deny_unknown_fields)]
58	pub struct Flow {
59	/// Bearer tokens runners present to claim jobs.
60	pub runner_tokens: Vec<String>,
61	/// `owner/*` or `owner/name`: repositories whose pushes start runs.
62	pub repos: Vec<String>,
63	pub job_timeout_minutes: u64,
64	}
65
66	impl Default for Flow {
67	fn default() -> Self {
68	Flow { runner_tokens: vec![], repos: vec![], job_timeout_minutes: 60 }
69	}
70	}
71
72	impl Flow {
73	/// Whether pushes to `owner/name` start runs.
74	pub fn allows(&self, owner: &str, name: &str) -> bool {
75	self.repos.iter().any(\|p\| match p.split_once('/') {
76	Some((o, "*")) => o == owner,
77	Some((o, n)) => o == owner && n == name,
78	None => false,
79	})
80	}
81	}
82
83	#[derive(Clone, Debug, Default, Deserialize)]
84	#[serde(default, deny_unknown_fields)]
85	pub struct Email {
86	/// `smtp://user:pass@host:port` or `smtps://…`; empty disables email.
87	pub smtp: String,
88	/// `OxygenHub <hub@example>`.
89	pub from: String,
90	}
91
92	#[derive(Clone, Debug, Deserialize)]
93	#[serde(default, deny_unknown_fields)]
94	pub struct Registration {
95	/// `open`, `invite` or `closed`; the admin page can override it.
96	pub mode: String,
97	}
98
99	impl Default for Registration {
100	fn default() -> Self {
101	Registration { mode: "invite".into() }
102	}
103	}
104
105	#[derive(Clone, Debug, Deserialize)]
106	#[serde(default, deny_unknown_fields)]
107	pub struct Site {
108	pub name: String,
109	pub description: String,
110	}
111
112	#[derive(Clone, Debug, Deserialize)]
113	#[serde(default, deny_unknown_fields)]
114	pub struct Server {
115	/// Plain HTTP; empty disables it.
116	pub bind: String,
117	/// HTTPS; empty disables it. Needs `tls`.
118	pub tls_bind: String,
119	/// What links and clone URLs start with.
120	pub base_url: String,
121	/// Trust `X-Forwarded-*` from a terminating proxy.
122	pub behind_proxy: bool,
123	}
124
125	#[derive(Clone, Debug, Deserialize)]
126	#[serde(default, deny_unknown_fields)]
127	pub struct Tls {
128	/// Generate a certificate at `init` (developer edition).
129	pub self_signed: bool,
130	/// PEM files; relative paths are under the data directory.
131	pub cert: String,
132	pub key: String,
133	}
134
135	#[derive(Clone, Debug, Default, Deserialize)]
136	#[serde(default, deny_unknown_fields)]
137	pub struct Auth {
138	/// Bearer tokens allowed to push until accounts exist (hub 0.2). Empty
139	/// means every push is accepted, as `oxy serve` does.
140	pub push_tokens: Vec<String>,
141	}
142
143	#[derive(Clone, Debug, Deserialize)]
144	#[serde(default, deny_unknown_fields)]
145	pub struct Limits {
146	/// Largest file rendered in the browser, e.g. `2MiB`.
147	pub render_limit: ByteSize,
148	pub asset_limit: ByteSize,
149	pub push_body_limit: ByteSize,
150	}
151
152	#[derive(Clone, Debug, Deserialize)]
153	#[serde(default, deny_unknown_fields)]
154	pub struct Retention {
155	pub trash_days: u32,
156	pub webhook_log_days: u32,
157	}
158
159	/// A byte count written as `512`, `2MiB`, `4GiB`, `100kB`.
160	#[derive(Clone, Copy, Debug, PartialEq, Eq)]
161	pub struct ByteSize(pub u64);
162
163	impl ByteSize {
164	pub fn parse(s: &str) -> Option<ByteSize> {
165	let s = s.trim();
166	let digits: String = s.chars().take_while(\|c\| c.is_ascii_digit()).collect();
167	let unit = s[digits.len()..].trim();
168	let n: u64 = digits.parse().ok()?;
169	let mult = match unit {
170	"" \| "B" => 1,
171	"k" \| "kB" \| "KB" => 1000,
172	"KiB" \| "K" => 1 << 10,
173	"M" \| "MB" => 1_000_000,
174	"MiB" => 1 << 20,
175	"G" \| "GB" => 1_000_000_000,
176	"GiB" => 1 << 30,
177	_ => return None,
178	};
179	Some(ByteSize(n.checked_mul(mult)?))
180	}
181	}
182
183	impl<'de> Deserialize<'de> for ByteSize {
184	fn deserialize<D: serde::Deserializer<'de>>(d: D) -> Result<ByteSize, D::Error> {
185	#[derive(Deserialize)]
186	#[serde(untagged)]
187	enum Raw {
188	Number(u64),
189	Text(String),
190	}
191	match Raw::deserialize(d)? {
192	Raw::Number(n) => Ok(ByteSize(n)),
193	Raw::Text(t) => ByteSize::parse(&t).ok_or_else(\|\| serde::de::Error::custom(format!("not a byte size: {t:?}"))),
194	}
195	}
196	}
197
198	impl Default for Site {
199	fn default() -> Self {
200	Site { name: "OxygenHub".into(), description: "Repositories, proposals and issues for Oxygen".into() }
201	}
202	}
203
204	impl Default for Server {
205	fn default() -> Self {
206	Server { bind: "127.0.0.1:7300".into(), tls_bind: String::new(), base_url: "http://127.0.0.1:7300".into(), behind_proxy: false }
207	}
208	}
209
210	impl Default for Tls {
211	fn default() -> Self {
212	Tls { self_signed: false, cert: "keys/tls.crt".into(), key: "keys/tls.key".into() }
213	}
214	}
215
216	impl Default for Limits {
217	fn default() -> Self {
218	Limits { render_limit: ByteSize(2 << 20), asset_limit: ByteSize(512 << 20), push_body_limit: ByteSize(4 << 30) }
219	}
220	}
221
222	impl Default for Retention {
223	fn default() -> Self {
224	Retention { trash_days: 30, webhook_log_days: 30 }
225	}
226	}
227
228	impl Default for Config {
229	fn default() -> Self {
230	Config {
231	data: PathBuf::from("data"),
232	site: Site::default(),
233	server: Server::default(),
234	tls: Tls::default(),
235	auth: Auth::default(),
236	registration: Registration::default(),
237	email: Email::default(),
238	limits: Limits::default(),
239	retention: Retention::default(),
240	flow: Flow::default(),
241	apt: Apt::default(),
242	}
243	}
244	}
245
246	impl Config {
247	/// Read `<data>/hub.toml` if present, then apply environment overrides.
248	pub fn load(data: &Path) -> anyhow::Result<Config> {
249	let path = data.join("hub.toml");
250	let mut cfg = match std::fs::read_to_string(&path) {
251	Ok(text) => Config::parse(&text)?,
252	Err(e) if e.kind() == std::io::ErrorKind::NotFound => Config::default(),
253	Err(e) => return Err(anyhow::anyhow!("reading {}: {e}", path.display())),
254	};
255	cfg.data = data.to_path_buf();
256	cfg.apply_env(\|k\| std::env::var(k).ok());
257	Ok(cfg)
258	}
259
260	pub fn parse(text: &str) -> anyhow::Result<Config> {
261	Ok(toml::from_str(text)?)
262	}
263
264	/// `OXYHUB_SERVER_BIND`, `OXYHUB_SITE_NAME`, … override the file.
265	pub fn apply_env(&mut self, get: impl Fn(&str) -> Option<String>) {
266	if let Some(v) = get("OXYHUB_SITE_NAME") {
267	self.site.name = v;
268	}
269	if let Some(v) = get("OXYHUB_SITE_DESCRIPTION") {
270	self.site.description = v;
271	}
272	if let Some(v) = get("OXYHUB_SERVER_BIND") {
273	self.server.bind = v;
274	}
275	if let Some(v) = get("OXYHUB_SERVER_TLS_BIND") {
276	self.server.tls_bind = v;
277	}
278	if let Some(v) = get("OXYHUB_SERVER_BASE_URL") {
279	self.server.base_url = v;
280	}
281	if let Some(v) = get("OXYHUB_SERVER_BEHIND_PROXY") {
282	self.server.behind_proxy = matches!(v.as_str(), "1" \| "true" \| "yes");
283	}
284	if let Some(v) = get("OXYHUB_TLS_SELF_SIGNED") {
285	self.tls.self_signed = matches!(v.as_str(), "1" \| "true" \| "yes");
286	}
287	if let Some(v) = get("OXYHUB_REGISTRATION_MODE") {
288	self.registration.mode = v;
289	}
290	if let Some(v) = get("OXYHUB_AUTH_PUSH_TOKENS") {
291	self.auth.push_tokens = v.split(',').map(str::trim).filter(\|s\| !s.is_empty()).map(String::from).collect();
292	}
293	if let Some(v) = get("OXYHUB_LIMITS_RENDER_LIMIT").and_then(\|v\| ByteSize::parse(&v)) {
294	self.limits.render_limit = v;
295	}
296	}
297
298	pub fn bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
299	parse_addr(&self.server.bind)
300	}
301
302	pub fn tls_bind_addr(&self) -> anyhow::Result<Option<SocketAddr>> {
303	parse_addr(&self.server.tls_bind)
304	}
305
306	pub fn tls_cert(&self) -> PathBuf {
307	self.data.join(&self.tls.cert)
308	}
309
310	pub fn tls_key(&self) -> PathBuf {
311	self.data.join(&self.tls.key)
312	}
313
314	pub fn repos_dir(&self) -> PathBuf {
315	self.data.join("repos")
316	}
317
318	pub fn keys_dir(&self) -> PathBuf {
319	self.data.join("keys")
320	}
321
322	pub fn db_path(&self) -> PathBuf {
323	self.data.join("hub.db")
324	}
325
326	/// The base URL without a trailing slash.
327	pub fn base_url(&self) -> &str {
328	self.server.base_url.trim_end_matches('/')
329	}
330	}
331
332	fn parse_addr(s: &str) -> anyhow::Result<Option<SocketAddr>> {
333	if s.trim().is_empty() {
334	return Ok(None);
335	}
336	Ok(Some(s.parse().map_err(\|e\| anyhow::anyhow!("bind address {s:?}: {e}"))?))
337	}
338
339	#[cfg(test)]
340	mod tests {
341	use super::*;
342
343	#[test]
344	fn byte_sizes() {
345	assert_eq!(ByteSize::parse("2MiB"), Some(ByteSize(2 << 20)));
346	assert_eq!(ByteSize::parse("512"), Some(ByteSize(512)));
347	assert_eq!(ByteSize::parse("4 GiB"), Some(ByteSize(4 << 30)));
348	assert_eq!(ByteSize::parse("100kB"), Some(ByteSize(100_000)));
349	assert_eq!(ByteSize::parse("lots"), None);
350	}
351
352	#[test]
353	fn file_then_environment() {
354	let mut cfg = Config::parse("[server]\nbind = \"0.0.0.0:7300\"\n[limits]\nrender_limit = \"1MiB\"\n").unwrap();
355	assert_eq!(cfg.server.bind, "0.0.0.0:7300");
356	assert_eq!(cfg.limits.render_limit, ByteSize(1 << 20));
357	assert_eq!(cfg.site.name, "OxygenHub");
358	cfg.apply_env(\|k\| match k {
359	"OXYHUB_SITE_NAME" => Some("Earth".into()),
360	"OXYHUB_AUTH_PUSH_TOKENS" => Some("a, b".into()),
361	_ => None,
362	});
363	assert_eq!(cfg.site.name, "Earth");
364	assert_eq!(cfg.auth.push_tokens, ["a", "b"]);
365	assert!(Config::parse("[nope]\nx = 1\n").is_err(), "unknown sections are errors, not silence");
366	}
367	}

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