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-rw-r--r--crates/chat-server/Cargo.toml2
-rw-r--r--crates/chat-server/src/http.rs20
-rw-r--r--crates/chat-server/src/main.rs34
-rw-r--r--crates/chat-server/web/index.html4
-rw-r--r--crates/config/Cargo.toml35
-rw-r--r--crates/config/README.txt20
-rw-r--r--crates/config/src/lib.rs332
7 files changed, 422 insertions, 25 deletions
diff --git a/crates/chat-server/Cargo.toml b/crates/chat-server/Cargo.toml
index eecebf6..709c37f 100644
--- a/crates/chat-server/Cargo.toml
+++ b/crates/chat-server/Cargo.toml
@@ -27,11 +27,11 @@ categories = ["web-programming"]
publish = false
[dependencies]
+stack-config = { path = "../config", version = "0.1.0" }
anyhow = "1"
axum = { version = "0.8", default-features = false, features = ["http1", "tokio", "json"] }
base64 = "0.22"
clap = { version = "4.6", features = ["derive"] }
-dotenvy = "0.15"
hex = "0.4"
openssl = "0.10"
rusqlite = { version = "0.41", default-features = false, features = ["bundled", "backup"] }
diff --git a/crates/chat-server/src/http.rs b/crates/chat-server/src/http.rs
index bb618d9..1c7286f 100644
--- a/crates/chat-server/src/http.rs
+++ b/crates/chat-server/src/http.rs
@@ -33,6 +33,7 @@ struct App {
permits: Arc<Semaphore>,
root: PathBuf,
origin: String,
+ public: std::collections::BTreeMap<String, String>,
}
fn secured(mut response: Response) -> Response {
@@ -129,22 +130,33 @@ async fn asset(State(app): State<App>, uri: axum::http::Uri) -> Response {
"/LICENSE" => ("LICENSE", "text/plain; charset=utf-8"),
_ => return secured(StatusCode::NOT_FOUND.into_response()),
};
- tokio::fs::read(app.root.join(path)).await.map_or_else(
- |_| secured(StatusCode::NOT_FOUND.into_response()),
- |bytes| secured(([("content-type", mime)], bytes).into_response()),
- )
+ let Ok(bytes) = tokio::fs::read(app.root.join(path)).await else {
+ return secured(StatusCode::NOT_FOUND.into_response());
+ };
+ if matches!(uri.path(), "/" | "/javascript.html") {
+ let rendered = String::from_utf8(bytes)
+ .map_err(anyhow::Error::from)
+ .and_then(|source| stack_config::render(&source, &app.public));
+ return rendered.map_or_else(
+ |_| secured(StatusCode::INTERNAL_SERVER_ERROR.into_response()),
+ |html| secured(([("content-type", mime)], html).into_response()),
+ );
+ }
+ secured(([("content-type", mime)], bytes).into_response())
}
pub(crate) async fn serve(
listener: tokio::net::TcpListener,
service: Service,
root: &Path,
+ public: std::collections::BTreeMap<String, String>,
) -> Result<()> {
let app = App {
origin: service.origin.clone(),
service: Arc::new(Mutex::new(service)),
permits: Arc::new(Semaphore::new(4)),
root: root.to_path_buf(),
+ public,
};
let routes = Router::new()
.route("/api", post(api))
diff --git a/crates/chat-server/src/main.rs b/crates/chat-server/src/main.rs
index c17a7f6..cfd3e7a 100644
--- a/crates/chat-server/src/main.rs
+++ b/crates/chat-server/src/main.rs
@@ -32,8 +32,8 @@ use std::process::ExitCode;
struct Arguments {
#[arg(long, default_value = ".")]
root: PathBuf,
- #[arg(long, default_value = "127.0.0.1:9080")]
- bind: SocketAddr,
+ #[arg(long)]
+ bind: Option<SocketAddr>,
#[arg(long, conflicts_with_all = ["reset_owner", "owner_fingerprint", "snapshot"])]
init: bool,
#[arg(long, value_name = "FINGERPRINT", conflicts_with_all = ["owner_fingerprint", "snapshot"], help = "Permanently clear the matching owner registration and all chat history after key loss")]
@@ -73,7 +73,7 @@ fn initialize(root: &std::path::Path) -> Result<()> {
{
writeln!(file, "CHAT_ORIGIN=http://127.0.0.1:9080")?;
}
- Ok(())
+ stack_config::initialize_public(root)
}
async fn run(arguments: Arguments) -> Result<()> {
@@ -81,6 +81,8 @@ async fn run(arguments: Arguments) -> Result<()> {
if arguments.init {
return initialize(&root);
}
+ let configuration = stack_config::Config::load(&root)?;
+ let bind = arguments.bind.unwrap_or(configuration.chat_bind()?);
let data = root.join("var/data/chat");
std::fs::create_dir_all(&data)?;
std::fs::set_permissions(&data, std::os::unix::fs::PermissionsExt::from_mode(0o700))?;
@@ -99,7 +101,7 @@ async fn run(arguments: Arguments) -> Result<()> {
return maintenance::fingerprint(&store);
}
if let Some(expected) = arguments.reset_owner {
- return maintenance::reset(&mut store, &expected, arguments.bind);
+ return maintenance::reset(&mut store, &expected, bind);
}
if let Some(destination) = arguments.snapshot {
store.snapshot(&destination)?;
@@ -110,28 +112,24 @@ async fn run(arguments: Arguments) -> Result<()> {
return Ok(());
}
ensure!(
- arguments.bind.ip().is_loopback(),
+ bind.ip().is_loopback(),
"Experimental server must bind to loopback"
);
- let settings = dotenvy::from_path_iter(root.join(".env"))?
- .collect::<std::result::Result<std::collections::HashMap<_, _>, _>>()?;
- let origin = settings
- .get("CHAT_ORIGIN")
- .context("Run --init to configure chat")?;
+ let origin = configuration.value("CHAT_ORIGIN")?;
ensure!(
- origin == &format!("http://{}", arguments.bind),
- "This development server requires CHAT_ORIGIN to match its loopback bind address"
+ origin == format!("http://{bind}"),
+ "CHAT_ORIGIN must match the loopback CHAT_BIND or --bind address"
);
- let setup = settings
- .get("CHAT_SETUP_TOKEN")
- .context("Missing CHAT_SETUP_TOKEN")?;
- let state = service::Service::new(store, origin.clone(), setup.clone());
- let listener = tokio::net::TcpListener::bind(arguments.bind).await?;
+ let setup = configuration
+ .value("CHAT_SETUP_TOKEN")
+ .context("Run --init to configure chat")?;
+ let state = service::Service::new(store, origin.to_owned(), setup.to_owned());
+ let listener = tokio::net::TcpListener::bind(bind).await?;
writeln!(
std::io::stdout().lock(),
"Experimental chat: {origin} (owner setup: /#setup)"
)?;
- http::serve(listener, state, &root).await
+ http::serve(listener, state, &root, configuration.public_values(None)?).await
}
#[tokio::main]
diff --git a/crates/chat-server/web/index.html b/crates/chat-server/web/index.html
index 7c2fe8b..79026b0 100644
--- a/crates/chat-server/web/index.html
+++ b/crates/chat-server/web/index.html
@@ -29,14 +29,14 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
<div class="libre-badge">[ <a href="https://www.gnu.org/software/librejs/" aria-describedby="js-warning">GNU LibreJS-compliant</a><span id="js-warning" role="tooltip">LibreJS compliance concerns software freedom, not a guarantee of privacy or security. Review the source code, dependencies, and scripts delivered to your browser. Server-delivered code can change between visits; free software can still track users or behave maliciously.</span> ]
<a class="script-licenses" href="/javascript.html" rel="jslicense">[ JAVASCRIPT LICENSES ]</a></div>
<header>
-<pre class="logo-art"><a href="https://doan.luuduct.ai/" class="logo" aria-label="Doan Luu Duc Tai home">
+<pre class="logo-art"><a href="{{SITE_ORIGIN}}/" class="logo" aria-label="Doan Luu Duc Tai home">
____ ___ _ _ _
| _ \ / _ \ / \ | \ | |
| | | | | | |/ _ \ | \| |
| |_| | |_| / ___ \| |\ |
|____/ \___/_/ \_\_| \_| LUU DUC TAI
</a></pre>
-<nav class="site-nav" aria-label="Site navigation"><a href="https://doan.luuduct.ai/">Home</a><a href="https://doan.luuduct.ai/#services">Services</a><a href="/" aria-current="page">Message Me</a></nav>
+<nav class="site-nav" aria-label="Site navigation"><a href="{{SITE_ORIGIN}}/">Home</a><a href="{{SITE_ORIGIN}}/#services">Services</a><a href="/" aria-current="page">Message Me</a></nav>
</header>
<div class="ascii-panel introduction">
<div class="ascii-bar" aria-hidden="true"><span>+</span><span class="ascii-rule">--------------------------------------------------------------------------------</span><span>+</span></div>
diff --git a/crates/config/Cargo.toml b/crates/config/Cargo.toml
new file mode 100644
index 0000000..b0c0c8d
--- /dev/null
+++ b/crates/config/Cargo.toml
@@ -0,0 +1,35 @@
+# Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+[package]
+name = "stack-config"
+version = "0.1.0"
+edition = "2024"
+authors = ["Doan Luu Duc Tai <doan@luuduct.ai>"]
+license = "AGPL-3.0-or-later"
+description = "Validated shared deployment configuration for the personal stack."
+repository = "https://git.doan.luuduct.ai/stack"
+readme = "README.txt"
+keywords = ["configuration", "self-hosting"]
+categories = ["config"]
+publish = false
+
+[dependencies]
+anyhow = "1"
+dotenvy = "0.15"
+tempfile = "3"
+
+[lints]
+workspace = true
diff --git a/crates/config/README.txt b/crates/config/README.txt
new file mode 100644
index 0000000..8648852
--- /dev/null
+++ b/crates/config/README.txt
@@ -0,0 +1,20 @@
+Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+SHARED STACK CONFIGURATION
+
+ Public defaults are documented in the root .env.example. Each installation
+ overrides them in the single root .env alongside private settings. Rendering
+ uses an explicit public allowlist. See docs/CONFIGURATION.txt for details.
diff --git a/crates/config/src/lib.rs b/crates/config/src/lib.rs
new file mode 100644
index 0000000..0a648a2
--- /dev/null
+++ b/crates/config/src/lib.rs
@@ -0,0 +1,332 @@
+// Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+#![doc = "Validated root environment configuration and public-only template rendering."]
+
+use anyhow::{Context, Result, ensure};
+use std::collections::BTreeMap;
+use std::fmt;
+use std::fs;
+use std::io::Write;
+use std::net::SocketAddr;
+use std::os::unix::fs::PermissionsExt;
+use std::path::{Component, Path};
+
+const EXAMPLE: &str = include_str!("../../../.env.example");
+const HOSTS: &[&str] = &[
+ "BASE_DOMAIN",
+ "SITE_HOST",
+ "GIT_HOST",
+ "SEARCH_HOST",
+ "WKD_HOST",
+ "CHAT_HOST",
+];
+const PUBLIC: &[&str] = &[
+ "BASE_DOMAIN",
+ "SITE_HOST",
+ "GIT_HOST",
+ "SEARCH_HOST",
+ "WKD_HOST",
+ "CHAT_HOST",
+ "HTTP_PORT",
+ "HTTPS_PORT",
+ "LOCAL_HTTP_PORT",
+ "CGIT_UPSTREAM",
+ "SEARXNG_UPSTREAM",
+ "CHAT_BIND",
+ "CHAT_ORIGIN",
+ "BACKUP_RECIPIENT",
+ "BACKUP_PUBLIC_KEY",
+];
+
+#[doc = "One installation's configuration; formatting deliberately excludes all values."]
+pub struct Config {
+ values: BTreeMap<String, String>,
+ explicit: BTreeMap<String, String>,
+}
+
+impl fmt::Debug for Config {
+ fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+ formatter.debug_struct("Config").finish_non_exhaustive()
+ }
+}
+
+fn defaults() -> Result<BTreeMap<String, String>> {
+ Ok(dotenvy::from_read_iter(EXAMPLE.as_bytes()).collect::<std::result::Result<_, _>>()?)
+}
+
+fn hostname(value: &str) -> bool {
+ value.len() <= 253
+ && value.split('.').all(|label| {
+ !label.is_empty()
+ && label.len() <= 63
+ && !label.starts_with('-')
+ && !label.ends_with('-')
+ && label
+ .bytes()
+ .all(|byte| byte.is_ascii_alphanumeric() || byte == b'-')
+ })
+}
+
+fn endpoint(value: &str) -> bool {
+ if value.parse::<SocketAddr>().is_ok() {
+ return true;
+ }
+ value.rsplit_once(':').is_some_and(|(host, port)| {
+ hostname(host) && port.parse::<u16>().is_ok_and(|number| number > 0)
+ })
+}
+
+impl Config {
+ #[doc = "Loads the single root .env over public defaults from the published example."]
+ #[doc = "# Errors"]
+ #[doc = "Rejects malformed files and invalid public deployment values without printing secrets."]
+ pub fn load(root: &Path) -> Result<Self> {
+ let path = root.join(".env");
+ let explicit: BTreeMap<String, String> = if path.exists() {
+ dotenvy::from_path_iter(path)
+ .context("Cannot parse root .env")?
+ .collect::<std::result::Result<_, _>>()
+ .map_err(|_| anyhow::anyhow!("Cannot parse root .env"))?
+ } else {
+ BTreeMap::new()
+ };
+ let mut values = defaults()?;
+ values.retain(|key, _| PUBLIC.contains(&key.as_str()));
+ values.extend(explicit.clone());
+ let config = Self { values, explicit };
+ config.validate()?;
+ Ok(config)
+ }
+
+ #[doc = "Returns a configured value; callers must not log private values."]
+ #[doc = "# Errors"]
+ #[doc = "Returns only the missing key name when a value is unavailable."]
+ pub fn value(&self, key: &str) -> Result<&str> {
+ self.values
+ .get(key)
+ .map(String::as_str)
+ .with_context(|| format!("Missing {key} in root .env"))
+ }
+
+ #[doc = "Returns whether a setting is present in the installation file rather than defaults."]
+ #[must_use]
+ pub fn is_explicit(&self, key: &str) -> bool {
+ self.explicit.contains_key(key)
+ }
+
+ #[doc = "Reads a nonzero TCP/UDP port."]
+ #[doc = "# Errors"]
+ #[doc = "Rejects invalid ports without displaying their raw values."]
+ pub fn port(&self, key: &str) -> Result<u16> {
+ let port = self
+ .value(key)?
+ .parse::<u16>()
+ .with_context(|| format!("Invalid {key} in root .env"))?;
+ ensure!(port > 0, "Invalid {key} in root .env");
+ Ok(port)
+ }
+
+ #[doc = "Reads the configured local chat socket address."]
+ #[doc = "# Errors"]
+ #[doc = "Rejects malformed socket addresses."]
+ pub fn chat_bind(&self) -> Result<SocketAddr> {
+ self.value("CHAT_BIND")?
+ .parse()
+ .context("Invalid CHAT_BIND in root .env")
+ }
+
+ fn validate(&self) -> Result<()> {
+ for key in HOSTS {
+ ensure!(hostname(self.value(key)?), "Invalid {key} in root .env");
+ }
+ ensure!(
+ self.port("HTTP_PORT")? != self.port("HTTPS_PORT")?,
+ "HTTP_PORT and HTTPS_PORT must differ"
+ );
+ ensure!(
+ (1024..=65_534).contains(&self.port("LOCAL_HTTP_PORT")?),
+ "LOCAL_HTTP_PORT must be between 1024 and 65534"
+ );
+ for key in ["CGIT_UPSTREAM", "SEARXNG_UPSTREAM"] {
+ ensure!(endpoint(self.value(key)?), "Invalid {key} in root .env");
+ }
+ self.chat_bind()?;
+ let origin = self.value("CHAT_ORIGIN")?;
+ ensure!(
+ origin.len() <= 256
+ && (origin.starts_with("http://") || origin.starts_with("https://"))
+ && origin
+ .bytes()
+ .all(|byte| byte.is_ascii_alphanumeric() || b":/.-[]".contains(&byte)),
+ "Invalid CHAT_ORIGIN in root .env"
+ );
+ let recipient = self.value("BACKUP_RECIPIENT")?;
+ ensure!(
+ [40, 64].contains(&recipient.len())
+ && recipient.bytes().all(|byte| byte.is_ascii_hexdigit()),
+ "Invalid BACKUP_RECIPIENT in root .env"
+ );
+ let key = Path::new(self.value("BACKUP_PUBLIC_KEY")?);
+ ensure!(
+ !key.as_os_str().is_empty()
+ && self
+ .value("BACKUP_PUBLIC_KEY")?
+ .bytes()
+ .all(|byte| byte.is_ascii_alphanumeric() || b"/._-".contains(&byte))
+ && key
+ .components()
+ .all(|part| matches!(part, Component::Normal(_))),
+ "BACKUP_PUBLIC_KEY must be project-relative"
+ );
+ Ok(())
+ }
+
+ #[doc = "Builds the explicit public-only template map for production or a local HTTP port."]
+ #[doc = "# Errors"]
+ #[doc = "Rejects invalid configuration or port arithmetic overflow."]
+ pub fn public_values(&self, local: Option<u16>) -> Result<BTreeMap<String, String>> {
+ let mut values = PUBLIC
+ .iter()
+ .map(|key| Ok(((*key).to_owned(), self.value(key)?.to_owned())))
+ .collect::<Result<BTreeMap<_, _>>>()?;
+ let https = self.port("HTTPS_PORT")?;
+ let suffix = if https == 443 {
+ String::new()
+ } else {
+ format!(":{https}")
+ };
+ for (name, key) in [
+ ("SITE_ORIGIN", "SITE_HOST"),
+ ("GIT_ORIGIN", "GIT_HOST"),
+ ("SEARCH_ORIGIN", "SEARCH_HOST"),
+ ("WKD_ORIGIN", "WKD_HOST"),
+ ("CHAT_PUBLIC_ORIGIN", "CHAT_HOST"),
+ ] {
+ values.insert(name.into(), format!("https://{}{suffix}", self.value(key)?));
+ }
+ if let Some(port) = local {
+ values.insert("SITE_ORIGIN".into(), format!("http://localhost:{port}"));
+ values.insert("GIT_ORIGIN".into(), "/git".into());
+ values.insert("SEARCH_ORIGIN".into(), "/search".into());
+ values.insert("WKD_ORIGIN".into(), String::new());
+ values.insert(
+ "CHAT_PUBLIC_ORIGIN".into(),
+ self.value("CHAT_ORIGIN")?.into(),
+ );
+ }
+ Ok(values)
+ }
+
+ #[doc = "Renders only whitelisted public variables; private or unknown placeholders fail closed."]
+ #[doc = "# Errors"]
+ #[doc = "Rejects unknown placeholders without substituting private configuration."]
+ pub fn render(&self, source: &str, local: Option<u16>) -> Result<String> {
+ render(source, &self.public_values(local)?)
+ }
+}
+
+#[doc = "Substitutes a previously filtered public configuration map into a source template."]
+#[doc = "# Errors"]
+#[doc = "Rejects remaining unknown placeholders."]
+pub fn render(source: &str, public: &BTreeMap<String, String>) -> Result<String> {
+ let mut result = source.to_owned();
+ for (key, value) in public {
+ result = result.replace(&format!("{{{{{key}}}}}"), value);
+ }
+ ensure!(
+ !result.contains("{{"),
+ "Unknown or private configuration placeholder"
+ );
+ Ok(result)
+}
+
+#[doc = "Appends missing public settings to the same root .env, preserving existing values."]
+#[doc = "# Errors"]
+#[doc = "Returns a filesystem/configuration error without printing environment contents."]
+pub fn initialize_public(root: &Path) -> Result<()> {
+ let path = root.join(".env");
+ let existing = if path.exists() {
+ fs::read_to_string(&path)?
+ } else {
+ String::new()
+ };
+ let config = Config::load(root)?;
+ let mut appended = String::new();
+ for (key, value) in defaults()? {
+ if PUBLIC.contains(&key.as_str()) && !config.is_explicit(&key) {
+ use std::fmt::Write as _;
+ writeln!(appended, "{key}={value}")?;
+ }
+ }
+ if appended.is_empty() {
+ return Ok(());
+ }
+ let mut file = tempfile::NamedTempFile::new_in(root)?;
+ file.as_file()
+ .set_permissions(fs::Permissions::from_mode(0o600))?;
+ write!(file, "{existing}\n{appended}")?;
+ file.as_file().sync_all()?;
+ file.persist(path).map_err(|error| error.error)?;
+ Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn public_rendering_rejects_secrets_and_host_injection() -> Result<()> {
+ let root = tempfile::tempdir()?;
+ fs::write(
+ root.path().join(".env"),
+ "CHAT_SETUP_TOKEN=\"private-malformed-sentinel\n",
+ )?;
+ let error = Config::load(root.path())
+ .err()
+ .context("Malformed secret must fail")?;
+ assert!(!format!("{error:#}").contains("private-malformed-sentinel"));
+ fs::write(
+ root.path().join(".env"),
+ "SITE_HOST=home.example.net\nGIT_HOST=source.example.net\nHTTPS_PORT=8443\nLOCAL_HTTP_PORT=8180\nCHAT_SETUP_TOKEN=private-token-sentinel\nSEARXNG_SECRET=private-search-sentinel\n",
+ )?;
+ let config = Config::load(root.path())?;
+ assert_eq!(
+ config.render("{{SITE_ORIGIN}} {{GIT_ORIGIN}}", None)?,
+ "https://home.example.net:8443 https://source.example.net:8443"
+ );
+ assert_eq!(
+ config.render("{{SITE_ORIGIN}} {{GIT_ORIGIN}}", Some(8180))?,
+ "http://localhost:8180 /git"
+ );
+ assert!(config.render("{{CHAT_SETUP_TOKEN}}", None).is_err());
+ assert!(!format!("{config:?}").contains("private-token"));
+ initialize_public(root.path())?;
+ assert_eq!(
+ Config::load(root.path())?.value("SITE_HOST")?,
+ "home.example.net"
+ );
+ assert_eq!(
+ Config::load(root.path())?.value("CHAT_SETUP_TOKEN")?,
+ "private-token-sentinel"
+ );
+ fs::write(
+ root.path().join(".env"),
+ "SITE_HOST=\"valid.example { respond bad }\"\n",
+ )?;
+ assert!(Config::load(root.path()).is_err());
+ Ok(())
+ }
+}
generated by cgit v1.2.3 (git 2.46.0) at 2026-10-31 06:59:37 +0000