git.delta.rocks / jrsonnet / refs/commits / 6a58b0ec3386

1pub mod location;23use clap::Clap;4use jsonnet_evaluator::{EvaluationSettings, EvaluationState, LocError, StackTrace, Val};5use jsonnet_parser::{el, Arg, ArgsDesc, Expr, LocExpr, ParserSettings};6use location::{offset_to_location, CodeLocation};7use std::env::current_dir;8use std::{collections::HashMap, path::PathBuf, str::FromStr, rc::Rc};910enum Format {11	None,12	Json,13	Yaml,14}1516impl FromStr for Format {17	type Err = &'static str;18	fn from_str(s: &str) -> Result<Self, Self::Err> {19		Ok(match s {20			"none" => Format::None,21			"json" => Format::Json,22			"yaml" => Format::Yaml,23			_ => return Err("no such format"),24		})25	}26}2728#[derive(PartialEq)]29enum TraceFormat {30	CppJsonnet,31	GoJsonnet,32	Custom,33}34impl FromStr for TraceFormat {35	type Err = &'static str;36	fn from_str(s: &str) -> Result<Self, Self::Err> {37		Ok(match s {38			"cpp" => TraceFormat::CppJsonnet,39			"go" => TraceFormat::GoJsonnet,40			"default" => TraceFormat::Custom,41			_ => return Err("no such format"),42		})43	}44}4546#[derive(Clone)]47struct ExtStr {48	name: String,49	value: String,50}51impl FromStr for ExtStr {52	type Err = &'static str;53	fn from_str(s: &str) -> Result<Self, Self::Err> {54		let out: Vec<_> = s.split('=').collect();55		match out.len() {56			1 => Ok(ExtStr {57				name: out[0].to_owned(),58				value: std::env::var(out[0]).or(Err("missing env var"))?,59			}),60			2 => Ok(ExtStr {61				name: out[0].to_owned(),62				value: out[1].to_owned(),63			}),64			_ => Err("bad ext-str syntax"),65		}66	}67}6869#[derive(Clap)]70#[clap(version = "0.1.0", author = "Lach <iam@lach.pw>")]71struct Opts {72	#[clap(long, about = "Disable global std variable")]73	no_stdlib: bool,74	#[clap(long, about = "Add external string")]75	ext_str: Vec<ExtStr>,76	#[clap(long, about = "Add external string from code")]77	ext_code: Vec<ExtStr>,78	#[clap(long, about = "Add TLA")]79	tla_str: Vec<ExtStr>,80	#[clap(long, about = "Add TLA from code")]81	tla_code: Vec<ExtStr>,82	#[clap(long, short = "f", default_value = "json", possible_values = &["none", "json", "yaml"], about = "Output format, wraps resulting value to corresponding std.manifest call")]83	format: Format,84	#[clap(long, default_value = "default", possible_values = &["cpp", "go", "default"], about = "Emulated needed stacktrace display")]85	trace_format: TraceFormat,8687	#[clap(88		long,89		short = "s",90		default_value = "200",91		about = "Number of allowed stack frames"92	)]93	max_stack: usize,94	#[clap(95		long,96		short = "t",97		default_value = "20",98		about = "Max length of stack trace before cropping"99	)]100	max_trace: usize,101102	#[clap(long, short = "J", about = "Library search dir")]103	jpath: Vec<PathBuf>,104105	#[clap(106		long,107		default_value = "3",108		about = "When using --format, this option specifies string to pad output with"109	)]110	line_padding: usize,111112	#[clap(about = "File to compile", index = 1)]113	input: String,114}115116fn main() {117	let opts: Opts = Opts::parse();118	let evaluator = jsonnet_evaluator::EvaluationState::new(119		EvaluationSettings {120			max_stack_trace_size: opts.max_trace,121			max_stack_frames: opts.max_stack,122		},123		Box::new(jsonnet_evaluator::FileImportResolver {124			library_paths: opts.jpath.clone(),125		}),126	);127	if !opts.no_stdlib {128		evaluator.with_stdlib();129	}130	for ExtStr { name, value } in opts.ext_str.iter().cloned() {131		evaluator.add_ext_var(name.into(), Val::Str(value.into()));132	}133	for ExtStr { name, value } in opts.ext_code.iter().cloned() {134		evaluator.add_ext_var(name.into(), evaluator.parse_evaluate_raw(&value).unwrap());135	}136	let mut input = current_dir().unwrap();137	input.push(opts.input.clone());138	let code_string = String::from_utf8(std::fs::read(opts.input.clone()).unwrap()).unwrap();139	if let Err(e) = evaluator.add_file(input.clone(), code_string.clone()) {140		print_syntax_error(e, &input, &code_string);141		std::process::exit(1);142	}143	let result = evaluator.evaluate_file(&input);144	match result {145		Ok(v) => {146			let v = match v {147				Val::Func(f) => {148					let mut desc_map = HashMap::new();149					for ExtStr { name, value } in opts.tla_str.iter().cloned() {150						desc_map.insert(name, el!(Expr::Str(value.into())));151					}152					for ExtStr { name, value } in opts.tla_code.iter().cloned() {153						desc_map.insert(154							name,155							jsonnet_parser::parse(156								&value,157								&ParserSettings {158									file_name: Rc::new(PathBuf::new()),159									loc_data: false,160								},161							)162							.unwrap(),163						);164					}165					evaluator.add_global("__tmp__tlf__".into(), Val::Func(f));166					evaluator167						.evaluate_raw(el!(Expr::Apply(168							el!(Expr::Var("__tmp__tlf__".into())),169							ArgsDesc(desc_map.into_iter().map(|(k, v)| Arg(Some(k), v)).collect()),170							false,171						)))172						.unwrap()173				}174				v => v,175			};176			let v = match opts.format {177				Format::Json => {178					if opts.no_stdlib {179						evaluator.with_stdlib();180					}181					evaluator.add_global("__tmp__to_json__".into(), v);182					let v = evaluator.parse_evaluate_raw(&format!(183						"std.manifestJsonEx(__tmp__to_json__, \"{}\")",184						" ".repeat(opts.line_padding),185					));186					match v {187						Ok(v) => v,188						Err(err) => {189							print_error(&err, evaluator, &opts);190							std::process::exit(1);191						}192					}193				}194				Format::Yaml => {195					if opts.no_stdlib {196						evaluator.with_stdlib();197					}198					evaluator.add_global("__tmp__to_yaml__".into(), v);199					let v = evaluator200						.parse_evaluate_raw("std.manifestYamlDoc(__tmp__to_yaml__, \"  \")");201					match v {202						Ok(v) => v,203						Err(err) => {204							print_error(&err, evaluator, &opts);205							std::process::exit(1);206						}207					}208				}209				_ => v,210			};211			match v {212				Val::Str(s) => println!("{}", s),213				Val::Num(n) => println!("{}", n),214				_v => eprintln!(215					"jsonnet output is not a string.\nDid you forgot to set --format, or wrap your data with std.manifestJson?"216				),217			}218		}219		Err(err) => {220			print_error(&err, evaluator, &opts);221			std::process::exit(1);222		}223	}224}225226fn print_error(err: &LocError, evaluator: EvaluationState, opts: &Opts) {227	println!("Error: {:?}", err.0);228	print_trace(&(err.1), evaluator, &opts);229}230231fn print_syntax_error(error: jsonnet_parser::ParseError, file: &PathBuf, code: &str) {232	use annotate_snippets::{233		display_list::{DisplayList, FormatOptions},234		snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},235	};236	//&("Expected: ".to_owned() + error.expected)237	let origin = file.to_str().unwrap();238	let error_message = format!("Expected: {}", error.expected);239	let snippet = Snippet {240		opt: FormatOptions {241			color: true,242			..Default::default()243		},244		title: Some(Annotation {245			label: Some(&error_message),246			id: None,247			annotation_type: AnnotationType::Error,248		}),249		footer: vec![],250		slices: vec![Slice {251			source: &code,252			line_start: 1,253			origin: Some(origin),254			fold: false,255			annotations: vec![SourceAnnotation {256				label: "At this position",257				annotation_type: AnnotationType::Error,258				range: (error.location.offset, error.location.offset + 1),259			}],260		}],261	};262263	let dl = DisplayList::from(snippet);264	println!("{}", dl);265}266267fn print_trace(trace: &StackTrace, evaluator: EvaluationState, opts: &Opts) {268	use annotate_snippets::{269		display_list::{DisplayList, FormatOptions},270		snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},271	};272	for item in trace.0.iter() {273		let desc = &item.1;274		let source = item.0.clone();275		let code = evaluator.get_source(&source.0);276		if code.is_none() {277			continue;278		}279		let code = code.unwrap();280		let start_end = offset_to_location(&code, &[source.1, source.2]);281		if opts.trace_format == TraceFormat::Custom {282			let source_fragment: String = code283				.chars()284				.skip(start_end[0].line_start_offset)285				.take(start_end[1].line_end_offset - start_end[0].line_start_offset)286				.collect();287			let snippet = Snippet {288				opt: FormatOptions {289					color: true,290					..Default::default()291				},292				title: Some(Annotation {293					label: Some(&item.1),294					id: None,295					annotation_type: AnnotationType::Error,296				}),297				footer: vec![],298				slices: vec![Slice {299					source: &source_fragment,300					line_start: start_end[0].line,301					origin: Some(&source.0.to_str().unwrap()),302					fold: false,303					annotations: vec![SourceAnnotation {304						label: desc,305						annotation_type: AnnotationType::Error,306						range: (307							source.1 - start_end[0].line_start_offset,308							source.2 - start_end[0].line_start_offset,309						),310					}],311				}],312			};313314			let dl = DisplayList::from(snippet);315			println!("{}", dl);316		} else {317			print_jsonnet_pair(318				source.0.to_str().unwrap(),319				&start_end[0],320				&start_end[1],321				opts.trace_format == TraceFormat::GoJsonnet,322			);323		}324	}325}326327fn print_jsonnet_pair(file: &str, start: &CodeLocation, end: &CodeLocation, is_go: bool) {328	if is_go {329		print!("        ");330	} else {331		print!("  ");332	}333	print!("{}:", file);334	if start.line == end.line {335		// IDK why, but this is the behavior original jsonnet cpp impl shows336		if start.column == end.column || !is_go && start.column + 1 == end.column {337			println!("{}:{}", start.line, end.column)338		} else {339			println!("{}:{}-{}", start.line, start.column, end.column);340		}341	} else {342		println!(343			"({}:{})-({}:{})",344			start.line, end.column, start.line, end.column345		);346	}347}