git.delta.rocks / jrsonnet / refs/commits / 1ddb92c00d0f

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cmds/jrsonnet/src/main.rs6.2 KiBsourcehistory
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};14use jrsonnet_parser::{SourceDefaultIgnoreJpath, SourcePath};1516#[cfg(feature = "mimalloc")]17#[global_allocator]18static GLOBAL: mimallocator::Mimalloc = mimallocator::Mimalloc;1920#[derive(Parser)]21enum SubOpts {22	/// Generate completions for specified shell23	Generate {24		/// Target shell name25		shell: Shell,26	},27}2829#[derive(Parser)]30#[clap(next_help_heading = "DEBUG")]31struct DebugOpts {32	/// Required OS stack size.33	/// This shouldn't be changed unless jrsonnet is failing with stack overflow error.34	#[clap(long, name = "size")]35	pub os_stack: Option<usize>,36}3738#[derive(Parser)]39#[clap(next_help_heading = "INPUT")]40struct InputOpts {41	/// Treat input as code, evaluate it instead of reading file.42	#[clap(long, short = 'e')]43	pub exec: bool,4445	/// Path to the file to be compiled if `--exec` is unset, otherwise code itself.46	pub input: Option<String>,4748	/// After executing input, apply specified code.49	/// Output of the initial input will be accessible using `_`.50	#[cfg(feature = "exp-apply")]51	#[clap(long)]52	pub exp_apply: Vec<String>,53}5455/// Jsonnet commandline interpreter (Rust implementation)56#[derive(Parser)]57#[clap(58	args_conflicts_with_subcommands = true,59	disable_version_flag = true,60	version,61	author62)]63struct Opts {64	#[clap(subcommand)]65	sub: Option<SubOpts>,66	/// Print version67	#[clap(long)]68	version: bool,6970	#[clap(flatten)]71	input: InputOpts,72	#[clap(flatten)]73	misc: MiscOpts,74	#[clap(flatten)]75	tla: TlaOpts,76	#[clap(flatten)]77	std: StdOpts,78	#[clap(flatten)]79	gc: GcOpts,8081	#[clap(flatten)]82	trace: TraceOpts,83	#[clap(flatten)]84	manifest: ManifestOpts,85	#[clap(flatten)]86	output: OutputOpts,87	#[clap(flatten)]88	debug: DebugOpts,89}9091// TODO: Add unix_sigpipe = "sig_dfl"92fn main() {93	let opts: Opts = Opts::parse();9495	if opts.version {96		print!("{}", Opts::command().render_version());97		std::process::exit(0)98	}99100	if let Some(sub) = opts.sub {101		match sub {102			SubOpts::Generate { shell } => {103				use clap_complete::generate;104				let app = &mut Opts::command();105				let buf = &mut std::io::stdout();106				generate(shell, app, "jrsonnet", buf);107				std::process::exit(0)108			}109		}110	}111112	let success = if let Some(size) = opts.debug.os_stack {113		std::thread::Builder::new()114			.stack_size(size * 1024 * 1024)115			.spawn(|| main_catch(opts))116			.expect("new thread spawned")117			.join()118			.expect("thread finished successfully")119	} else {120		main_catch(opts)121	};122	if !success {123		std::process::exit(1);124	}125}126127#[derive(thiserror::Error, Debug)]128enum Error {129	// Handled differently130	#[error("evaluation error")]131	Evaluation(JrError),132	#[error("io error")]133	Io(#[from] std::io::Error),134	#[error("input is not utf8 encoded")]135	Utf8(#[from] std::str::Utf8Error),136	#[error("missing input argument")]137	MissingInputArgument,138}139impl From<JrError> for Error {140	fn from(e: JrError) -> Self {141		Self::Evaluation(e)142	}143}144impl From<ErrorKind> for Error {145	fn from(e: ErrorKind) -> Self {146		Self::from(JrError::from(e))147	}148}149150fn main_catch(opts: Opts) -> bool {151	let trace = opts.trace.trace_format();152	if let Err(e) = main_real(opts) {153		if let Error::Evaluation(e) = e {154			let mut out = String::new();155			trace.write_trace(&mut out, &e).expect("format error");156			eprintln!("{out}");157		} else {158			eprintln!("{e}");159		}160		return false;161	}162	true163}164165fn main_real(opts: Opts) -> Result<(), Error> {166	let _gc_leak_guard = opts.gc.leak_on_exit();167	let _gc_print_stats = opts.gc.stats_printer();168	let _stack_depth_override = opts.misc.stack_size_override();169170	let import_resolver = opts.misc.import_resolver();171	let std = opts.std.context_initializer()?;172173	let mut s = State::builder();174	s.import_resolver(import_resolver).context_initializer(std);175	let s = s.build();176	let _s = s.enter();177178	let input = opts.input.input.ok_or(Error::MissingInputArgument)?;179	let val = if opts.input.exec {180		s.evaluate_snippet("<cmdline>".to_owned(), &input as &str)?181	} else if input == "-" {182		let mut input = Vec::new();183		std::io::stdin().read_to_end(&mut input)?;184		let input_str = std::str::from_utf8(&input)?;185		s.evaluate_snippet("<stdin>".to_owned(), input_str)?186	} else {187		s.import_from(&SourcePath::new(SourceDefaultIgnoreJpath), input.as_str())?188	};189190	let tla = opts.tla.tla_opts()?;191	#[allow(192		// It is not redundant/unused in exp-apply193		unused_mut,194		clippy::redundant_clone,195	)]196	let mut val = apply_tla(&tla, val)?;197198	#[cfg(feature = "exp-apply")]199	for apply in opts.input.exp_apply {200		use jrsonnet_evaluator::{InitialUnderscore, Thunk};201		val = s.evaluate_snippet_with(202			"<exp_apply>".to_owned(),203			&apply,204			InitialUnderscore(Thunk::evaluated(val)),205		)?;206	}207208	let manifest_format = opts.manifest.manifest_format();209	if let Some(multi) = opts.output.multi {210		if opts.output.create_output_dirs {211			let mut dir = multi.clone();212			dir.pop();213			create_dir_all(dir)?;214		}215		let Val::Obj(obj) = val else {216			bail!(217				"value should be object for --multi manifest, got {}",218				val.value_type()219			)220		};221		for (field, data) in obj.iter(222			#[cfg(feature = "exp-preserve-order")]223			opts.manifest.preserve_order,224		) {225			let data = data.with_description(|| format!("getting field {field} for manifest"))?;226227			let mut path = multi.clone();228			path.push(&field as &str);229			if opts.output.create_output_dirs {230				let mut dir = path.clone();231				dir.pop();232				create_dir_all(dir)?;233			}234			println!("{}", path.to_str().expect("path"));235			let mut file = File::create(path)?;236			write!(237				file,238				"{}",239				data.manifest(&manifest_format)240					.with_description(|| format!("manifesting {field}"))?,241			)?;242			if manifest_format.file_trailing_newline() {243				writeln!(file)?;244			}245			file.flush()?;246		}247	} else if let Some(path) = opts.output.output_file {248		if opts.output.create_output_dirs {249			let mut dir = path.clone();250			dir.pop();251			create_dir_all(dir)?;252		}253		let mut file = File::create(path)?;254		writeln!(file, "{}", val.manifest(manifest_format)?)?;255	} else {256		let output = val.manifest(manifest_format)?;257		if !output.is_empty() {258			println!("{output}");259		}260	}261262	Ok(())263}