git.delta.rocks / jrsonnet / refs/commits / 5585b94101d8

1use std::{2	fs::{create_dir_all, File},3	io::{Read, Write},4};56use clap::{CommandFactory, Parser};7use clap_complete::Shell;8use jrsonnet_cli::{GcOpts, ManifestOpts, MiscOpts, OutputOpts, StdOpts, TlaOpts, TraceOpts};9use jrsonnet_evaluator::{10	apply_tla, bail,11	error::{Error as JrError, ErrorKind},12	ResultExt, State, Val,13};1415#[cfg(feature = "mimalloc")]16#[global_allocator]17static GLOBAL: mimallocator::Mimalloc = mimallocator::Mimalloc;1819#[derive(Parser)]20enum SubOpts {21	/// Generate completions for specified shell22	Generate {23		/// Target shell name24		shell: Shell,25	},26}2728#[derive(Parser)]29#[clap(next_help_heading = "DEBUG")]30struct DebugOpts {31	/// Required OS stack size.32	/// This shouldn't be changed unless jrsonnet is failing with stack overflow error.33	#[clap(long, name = "size")]34	pub os_stack: Option<usize>,35}3637#[derive(Parser)]38#[clap(next_help_heading = "INPUT")]39struct InputOpts {40	/// Treat input as code, evaluate it instead of reading file.41	#[clap(long, short = 'e')]42	pub exec: bool,4344	/// Path to the file to be compiled if `--exec` is unset, otherwise code itself.45	pub input: Option<String>,4647	/// After executing input, apply specified code.48	/// Output of the initial input will be accessible using `_`.49	#[cfg(feature = "exp-apply")]50	#[clap(long)]51	pub exp_apply: Vec<String>,52}5354/// Jsonnet commandline interpreter (Rust implementation)55#[derive(Parser)]56#[clap(57	args_conflicts_with_subcommands = true,58	disable_version_flag = true,59	version,60	author61)]62struct Opts {63	#[clap(subcommand)]64	sub: Option<SubOpts>,65	/// Print version66	#[clap(long)]67	version: bool,6869	#[clap(flatten)]70	input: InputOpts,71	#[clap(flatten)]72	misc: MiscOpts,73	#[clap(flatten)]74	tla: TlaOpts,75	#[clap(flatten)]76	std: StdOpts,77	#[clap(flatten)]78	gc: GcOpts,7980	#[clap(flatten)]81	trace: TraceOpts,82	#[clap(flatten)]83	manifest: ManifestOpts,84	#[clap(flatten)]85	output: OutputOpts,86	#[clap(flatten)]87	debug: DebugOpts,88}8990// TODO: Add unix_sigpipe = "sig_dfl"91fn main() {92	let opts: Opts = Opts::parse();9394	if opts.version {95		print!("{}", Opts::command().render_version());96		std::process::exit(0)97	}9899	if let Some(sub) = opts.sub {100		match sub {101			SubOpts::Generate { shell } => {102				use clap_complete::generate;103				let app = &mut Opts::command();104				let buf = &mut std::io::stdout();105				generate(shell, app, "jrsonnet", buf);106				std::process::exit(0)107			}108		}109	}110111	let success = if let Some(size) = opts.debug.os_stack {112		std::thread::Builder::new()113			.stack_size(size * 1024 * 1024)114			.spawn(|| main_catch(opts))115			.expect("new thread spawned")116			.join()117			.expect("thread finished successfully")118	} else {119		main_catch(opts)120	};121	if !success {122		std::process::exit(1);123	}124}125126#[derive(thiserror::Error, Debug)]127enum Error {128	// Handled differently129	#[error("evaluation error")]130	Evaluation(JrError),131	#[error("io error")]132	Io(#[from] std::io::Error),133	#[error("input is not utf8 encoded")]134	Utf8(#[from] std::str::Utf8Error),135	#[error("missing input argument")]136	MissingInputArgument,137}138impl From<JrError> for Error {139	fn from(e: JrError) -> Self {140		Self::Evaluation(e)141	}142}143impl From<ErrorKind> for Error {144	fn from(e: ErrorKind) -> Self {145		Self::from(JrError::from(e))146	}147}148149fn main_catch(opts: Opts) -> bool {150	let trace = opts.trace.trace_format();151	if let Err(e) = main_real(opts) {152		if let Error::Evaluation(e) = e {153			let mut out = String::new();154			trace.write_trace(&mut out, &e).expect("format error");155			eprintln!("{out}");156		} else {157			eprintln!("{e}");158		}159		return false;160	}161	true162}163164fn main_real(opts: Opts) -> Result<(), Error> {165	let _gc_leak_guard = opts.gc.leak_on_exit();166	let _gc_print_stats = opts.gc.stats_printer();167	let _stack_depth_override = opts.misc.stack_size_override();168169	let import_resolver = opts.misc.import_resolver();170	let std = opts.std.context_initializer()?;171172	let mut s = State::builder();173	s.import_resolver(import_resolver).context_initializer(std);174	let s = s.build();175176	let input = opts.input.input.ok_or(Error::MissingInputArgument)?;177	let val = if opts.input.exec {178		s.evaluate_snippet("<cmdline>".to_owned(), &input as &str)?179	} else if input == "-" {180		let mut input = Vec::new();181		std::io::stdin().read_to_end(&mut input)?;182		let input_str = std::str::from_utf8(&input)?;183		s.evaluate_snippet("<stdin>".to_owned(), input_str)?184	} else {185		s.import(input.as_str())?186	};187188	let tla = opts.tla.tla_opts()?;189	#[allow(190		// It is not redundant/unused in exp-apply191		unused_mut,192		clippy::redundant_clone,193	)]194	let mut val = apply_tla(s.clone(), &tla, val)?;195196	#[cfg(feature = "exp-apply")]197	for apply in opts.input.exp_apply {198		use jrsonnet_evaluator::{InitialUnderscore, Thunk};199		val = s.evaluate_snippet_with(200			"<exp_apply>".to_owned(),201			&apply,202			InitialUnderscore(Thunk::evaluated(val)),203		)?;204	}205206	let manifest_format = opts.manifest.manifest_format();207	if let Some(multi) = opts.output.multi {208		if opts.output.create_output_dirs {209			let mut dir = multi.clone();210			dir.pop();211			create_dir_all(dir)?;212		}213		let Val::Obj(obj) = val else {214			bail!(215				"value should be object for --multi manifest, got {}",216				val.value_type()217			)218		};219		for (field, data) in obj.iter(220			#[cfg(feature = "exp-preserve-order")]221			opts.manifest.preserve_order,222		) {223			let data = data.with_description(|| format!("getting field {field} for manifest"))?;224225			let mut path = multi.clone();226			path.push(&field as &str);227			if opts.output.create_output_dirs {228				let mut dir = path.clone();229				dir.pop();230				create_dir_all(dir)?;231			}232			println!("{}", path.to_str().expect("path"));233			let mut file = File::create(path)?;234			write!(235				file,236				"{}",237				data.manifest(&manifest_format)238					.with_description(|| format!("manifesting {field}"))?,239			)?;240			if manifest_format.file_trailing_newline() {241				writeln!(file)?;242			}243			file.flush()?;244		}245	} else if let Some(path) = opts.output.output_file {246		if opts.output.create_output_dirs {247			let mut dir = path.clone();248			dir.pop();249			create_dir_all(dir)?;250		}251		let mut file = File::create(path)?;252		writeln!(file, "{}", val.manifest(manifest_format)?)?;253	} else {254		let output = val.manifest(manifest_format)?;255		if !output.is_empty() {256			println!("{output}");257		}258	}259260	Ok(())261}