git.delta.rocks / jrsonnet / refs/commits / 353ae3be2d27

1use std::{collections::HashMap, ffi::OsStr, process::Stdio, task::Poll};23use anyhow::{Context, Result};4use futures::StreamExt;5use serde::{6	de::{DeserializeOwned, Visitor},7	Deserialize,8};9use tokio::{io::AsyncRead, process::Command, select};10use tokio_util::codec::{BytesCodec, FramedRead, LinesCodec};11use tracing::{info, info_span, warn, Span};12use tracing_indicatif::span_ext::IndicatifSpanExt;1314fn escape_bash(input: &str, out: &mut String) {15	const TO_ESCAPE: &str = "$ !\"#&'()*,;<>?[\\]^`{|}";16	if input.chars().all(|c| !TO_ESCAPE.contains(c)) {17		out.push_str(input);18		return;19	}20	out.push('\'');21	for (i, v) in input.split('\'').enumerate() {22		if i != 0 {23			out.push_str("'\"'\"'");24		}25		out.push_str(v);26	}27	out.push('\'');28}29fn ostoutf8(os: impl AsRef<OsStr>) -> String {30	os.as_ref().to_str().expect("non-utf8 data").to_owned()31}32#[derive(Clone)]33pub struct MyCommand {34	command: String,35	args: Vec<String>,36	env: Vec<(String, String)>,37}38impl MyCommand {39	pub fn new(cmd: impl AsRef<OsStr>) -> Self {40		assert!(!cmd.as_ref().is_empty());41		Self {42			command: ostoutf8(cmd),43			args: vec![],44			env: vec![],45		}46	}47	fn into_args(self) -> Vec<String> {48		let mut out = Vec::new();49		if !self.env.is_empty() {50			out.push("env".to_owned());51			for (k, v) in self.env {52				assert!(!k.contains("="));53				out.push(format!("{k}={v}"));54			}55		}56		out.push(self.command);57		out.extend(self.args.into_iter());58		out59	}60	fn into_string(self) -> String {61		let mut out = String::new();62		if !self.env.is_empty() {63			out.push_str("env");64			for (k, v) in self.env {65				out.push(' ');66				assert!(!k.contains("="));67				escape_bash(&k, &mut out);68				out.push('=');69				escape_bash(&v, &mut out);70			}71		}72		if !out.is_empty() {73			out.push(' ');74		}75		escape_bash(&self.command, &mut out);76		for arg in self.args {77			out.push(' ');78			escape_bash(&arg, &mut out);79		}80		out81	}82	fn into_command(self) -> Command {83		let mut out = Command::new(self.command);84		out.args(self.args);85		for (k, v) in self.env {86			out.env(k, v);87		}88		out89	}90	pub fn arg(&mut self, arg: impl AsRef<OsStr>) -> &mut Self {91		let arg = arg.as_ref();92		self.args.push(ostoutf8(arg));93		self94	}95	pub fn eqarg(&mut self, arg: impl AsRef<OsStr>, value: impl AsRef<OsStr>) -> &mut Self {96		let arg = arg.as_ref();97		let value = value.as_ref();98		let arg = ostoutf8(arg);99		let value = ostoutf8(value);100		self.arg(format!("{arg}={value}"));101		self102	}103	pub fn comparg(&mut self, arg: impl AsRef<OsStr>, value: impl AsRef<OsStr>) -> &mut Self {104		self.arg(arg);105		self.arg(value);106		self107	}108	pub fn args<V: AsRef<OsStr>>(&mut self, args: impl IntoIterator<Item = V>) -> &mut Self {109		for arg in args.into_iter() {110			let arg = arg.as_ref();111			self.args.push(ostoutf8(arg));112		}113		self114	}115	pub fn sudo(self) -> Self {116		let mut out = Self::new("sudo");117		out.args(self.into_args());118		out119	}120	pub fn ssh(self, on: impl AsRef<OsStr>) -> Self {121		let mut out = Self::new("ssh");122		out.arg(on).arg("--");123		out.arg(self.into_string());124		out125	}126127	pub async fn run(self) -> Result<()> {128		let str = self.clone().into_string();129		let cmd = self.into_command();130		run_nix_inner(str, cmd, &mut PlainHandler).await?;131		Ok(())132	}133	pub async fn run_string(self) -> Result<String> {134		let str = self.clone().into_string();135		let cmd = self.into_command();136		let v = run_nix_inner_stdout(str, cmd, &mut PlainHandler).await?;137		Ok(v)138	}139	pub async fn run_nix_json<T: DeserializeOwned>(self) -> Result<T> {140		let str = self.run_nix_string().await?;141		serde_json::from_str(&str).with_context(|| format!("{:?}", str))142	}143144	pub async fn run_nix_string(self) -> Result<String> {145		let str = self.clone().into_string();146		let mut cmd = self.into_command();147		cmd.arg("--log-format").arg("internal-json");148		run_nix_inner_stdout(str, cmd, &mut NixHandler::default()).await149	}150	pub async fn run_nix(self) -> Result<()> {151		let str = self.clone().into_string();152		let mut cmd = self.into_command();153		cmd.arg("--log-format").arg("internal-json");154		cmd.stdout(Stdio::inherit());155		run_nix_inner(str, cmd, &mut NixHandler::default()).await156	}157}158159struct EmptyAsyncRead;160impl AsyncRead for EmptyAsyncRead {161	fn poll_read(162		self: std::pin::Pin<&mut Self>,163		_cx: &mut std::task::Context<'_>,164		_buf: &mut tokio::io::ReadBuf<'_>,165	) -> Poll<std::io::Result<()>> {166		Poll::Pending167	}168}169170async fn run_nix_inner_stdout(171	str: String,172	cmd: Command,173	handler: &mut dyn Handler,174) -> Result<String> {175	Ok(run_nix_inner_raw(str, cmd, true, handler)176		.await?177		.expect("has out"))178}179async fn run_nix_inner(str: String, cmd: Command, handler: &mut dyn Handler) -> Result<()> {180	let v = run_nix_inner_raw(str, cmd, false, handler).await?;181	assert!(v.is_none());182	Ok(())183}184185trait Handler {186	fn handle_err(&mut self, e: &str);187	fn handle_info(&mut self, e: &str);188}189190struct PlainHandler;191impl Handler for PlainHandler {192	fn handle_err(&mut self, e: &str) {193		info!(target: "log", "{e}");194	}195196	fn handle_info(&mut self, e: &str) {197		info!(target: "log", "{e}");198	}199}200201#[derive(Default)]202struct NixHandler {203	spans: HashMap<u64, Span>,204}205impl Handler for NixHandler {206	fn handle_err(&mut self, e: &str) {207		if let Some(e) = e.strip_prefix("@nix ") {208			let log: NixLog = match serde_json::from_str(e) {209				Ok(l) => l,210				Err(err) => {211					warn!("failed to parse nix log line {:?}: {}", e, err);212					return;213				}214			};215			match log {216				NixLog::Msg { msg, raw_msg, .. } => {217					if !(msg.starts_with("\u{1b}[35;1mwarning:\u{1b}[0m Git tree '") && msg.ends_with("' is dirty"))218					&& !msg.starts_with("\u{1b}[35;1mwarning:\u{1b}[0m not writing modified lock file of flake")219					&& msg != "\u{1b}[35;1mwarning:\u{1b}[0m \u{1b}[31;1merror:\u{1b}[0m SQLite database '\u{1b}[35;1m/nix/var/nix/db/db.sqlite\u{1b}[0m' is busy" {220						if let Some(raw_msg) = raw_msg {221							if !msg.is_empty() {222								info!(target: "nix", "{}\n{}", raw_msg.trim_end(), msg.trim_end())223							} else {224								info!(target: "nix", "{}", raw_msg.trim_end())225							}226						} else {227							info!(target: "nix", "{}", msg.trim_end())228						}229					}230				}231				NixLog::Start {232					ref fields,233					typ,234					id,235					..236				} if typ == 105 && !fields.is_empty() => {237					if let [LogField::String(drv), ..] = &fields[..] {238						let mut drv = drv.as_str();239						if let Some(pkg) = drv.strip_prefix("/nix/store/") {240							let mut it = pkg.splitn(2, '-');241							it.next();242							if let Some(pkg) = it.next() {243								drv = pkg;244							}245						}246						info!(target: "nix","building {}", drv);247						let span = info_span!("build", drv);248						span.pb_start();249						self.spans.insert(id, span);250					} else {251						warn!("bad build log: {:?}", log)252					}253				}254				NixLog::Start {255					ref fields,256					typ,257					id,258					..259				} if typ == 100 && fields.len() >= 3 => {260					if let [LogField::String(drv), LogField::String(from), LogField::String(to), ..] =261						&fields[..]262					{263						let mut drv = drv.as_str();264265						if let Some(pkg) = drv.strip_prefix("/nix/store/") {266							let mut it = pkg.splitn(2, '-');267							it.next();268							if let Some(pkg) = it.next() {269								drv = pkg;270							}271						}272						// info!(target: "nix","copying {} {} -> {}", drv, from, to);273						let span = info_span!("copy", from, to, drv);274						span.pb_start();275						self.spans.insert(id, span);276					} else {277						warn!("bad copy log: {:?}", log)278					}279				}280				NixLog::Start { text, typ, id, .. }281					if typ == 0 || typ == 102 || typ == 103 || typ == 104 =>282				{283					if !text.is_empty()284						&& text != "querying info about missing paths"285						&& text != "copying 0 paths"286					{287						let span = info_span!("job");288						span.pb_start();289						span.pb_set_message(text.trim());290						self.spans.insert(id, span);291						info!(target: "nix", "{}", text);292					}293				}294				NixLog::Start {295					text,296					level: 0,297					typ: 108,298					..299				} if text.is_empty() => {300					// Cache lookup? Coupled with copy log301				}302				NixLog::Start {303					text,304					level: 4,305					typ: 109,306					..307				} if text.starts_with("querying info about ") => {308					// Cache lookup309				}310				NixLog::Start {311					text,312					level: 4,313					typ: 101,314					..315				} if text.starts_with("downloading ") => {316					// NAR downloading, coupled with copy log317				}318				NixLog::Start {319					text,320					level: 1,321					typ: 111,322					..323				} if text.starts_with("waiting for a machine to build ") => {324					// Useless repeating notification about build325				}326				NixLog::Start {327					text,328					level: 3,329					typ: 111,330					..331				} if text.starts_with("resolved derivation: ") => {332					// CA resolved333				}334				NixLog::Start {335					text,336					level: 1,337					typ: 111,338					id,339					..340				} if text.starts_with("waiting for lock on ") => {341					let mut drv = text.strip_prefix("waiting for lock on ").unwrap();342					if let Some(txt) = drv.strip_prefix("\u{1b}[35;1m'") {343						drv = txt;344					}345					if let Some(txt) = drv.strip_suffix("'\u{1b}[0m") {346						drv = txt;347					}348					if let Some(txt) = drv.split("', '").next() {349						drv = txt;350					}351					if let Some(pkg) = drv.strip_prefix("/nix/store/") {352						let mut it = pkg.splitn(2, '-');353						it.next();354						if let Some(pkg) = it.next() {355							drv = pkg;356						}357					}358					let span = info_span!("waiting on drv", drv);359					span.pb_start();360					self.spans.insert(id, span);361					// Concurrent build of the same message362				}363				NixLog::Stop { id, .. } => {364					self.spans.remove(&id);365				}366				NixLog::Result { fields, id, typ } if typ == 101 && !fields.is_empty() => {367					if let Some(span) = self.spans.get(&id) {368						if let LogField::String(s) = &fields[0] {369							span.pb_set_message(s.trim());370						} else {371							warn!("bad fields: {fields:?}");372						}373					} else {374						warn!("unknown result id: {id} {typ} {fields:?}");375					}376					// dbg!(fields, id, typ);377				}378				NixLog::Result { fields, id, typ } if typ == 105 && fields.len() >= 4 => {379					if let Some(span) = self.spans.get(&id) {380						if let [LogField::Num(done), LogField::Num(expected), LogField::Num(_running), LogField::Num(_failed)] =381							&fields[..4]382						{383							span.pb_set_length(*expected);384							span.pb_set_position(*done);385						} else {386							warn!("bad fields: {fields:?}");387						}388					} else {389						// warn!("unknown result id: {id} {typ} {fields:?}");390						// Unaccounted progress.391					}392					// dbg!(fields, id, typ);393				}394				NixLog::Result { typ, .. } if typ == 104 || typ == 106 => {395					// Set phase, expected396				}397				_ => warn!("unknown log: {:?}", log),398			};399		} else {400			warn!(target = "nix", "unknown: {}", e.trim())401		}402	}403	fn handle_info(&mut self, o: &str) {404		self.handle_err(o)405	}406}407408async fn run_nix_inner_raw(409	str: String,410	mut cmd: Command,411	want_stdout: bool,412	handler: &mut dyn Handler,413) -> Result<Option<String>> {414	info!("running {str}");415	cmd.stderr(Stdio::piped());416	cmd.stdout(Stdio::piped());417	let mut child = cmd.spawn()?;418	let mut stderr = child.stderr.take().unwrap();419	let stdout = child.stdout.take().unwrap();420	let mut err = FramedRead::new(&mut stderr, LinesCodec::new());421	let mut out: Option<Box<dyn AsyncRead + Unpin>> = Some(Box::new(stdout));422	let mut ob = want_stdout423		.then(|| out.take().unwrap())424		.unwrap_or_else(|| Box::new(EmptyAsyncRead));425	let mut ol = (!want_stdout)426		.then(|| out.take().unwrap())427		.unwrap_or_else(|| Box::new(EmptyAsyncRead));428	let mut ob = FramedRead::new(&mut ob, BytesCodec::new());429	let mut ol = FramedRead::new(&mut ol, LinesCodec::new());430431	// while let Some(line) = read.next().await? {}432433	let mut out_buf = if want_stdout { Some(vec![]) } else { None };434	loop {435		select! {436			e = err.next() => {437				if let Some(e) = e {438					let e = e?;439					handler.handle_err(&e);440				}441			},442			o = ob.next() => {443				if let Some(o) = o {444					out_buf.as_mut().expect("stdout == wants_stdout").extend_from_slice(&o?);445				}446			},447			o = ol.next() => {448				if let Some(o) = o {449					let o = o?;450					handler.handle_info(&o);451				}452			},453			code = child.wait() => {454				let code = code?;455				if !code.success() {456					anyhow::bail!("command '{str}' failed with status {}", code);457				}458				break;459			}460		}461	}462463	Ok(out_buf.map(String::from_utf8).transpose()?)464}465466#[derive(Debug)]467enum LogField {468	String(String),469	Num(u64),470}471472impl<'de> Deserialize<'de> for LogField {473	fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>474	where475		D: serde::Deserializer<'de>,476	{477		struct StringOrNum;478		impl<'de> Visitor<'de> for StringOrNum {479			type Value = LogField;480481			fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {482				write!(f, "string or unsigned")483			}484485			fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>486			where487				E: serde::de::Error,488			{489				Ok(LogField::String(v.to_owned()))490			}491492			fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>493			where494				E: serde::de::Error,495			{496				Ok(LogField::Num(v))497			}498		}499500		deserializer.deserialize_any(StringOrNum)501	}502}503504#[derive(Deserialize, Debug)]505#[serde(rename_all = "camelCase", tag = "action")]506#[allow(dead_code)]507enum NixLog {508	Msg {509		level: u32,510		msg: String,511		raw_msg: Option<String>,512	},513	Start {514		id: u64,515		level: u32,516		#[serde(default)]517		fields: Vec<LogField>,518		text: String,519		#[serde(rename = "type")]520		typ: u32,521	},522	Stop {523		id: u64,524	},525	Result {526		id: u64,527		#[serde(rename = "type")]528		typ: u32,529		#[serde(default)]530		fields: Vec<LogField>,531	},532}