git.delta.rocks / jrsonnet / refs/commits / 9e9c9376494e

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, rc::Rc, str::FromStr};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 = evaluator.run_in_state(|| match opts.format {177				Format::Json => Ok(Val::Str(v.into_json(opts.line_padding)?)),178				Format::Yaml => {179					evaluator.add_global("__tmp__to_yaml__".into(), v);180					evaluator.parse_evaluate_raw("std.manifestYamlDoc(__tmp__to_yaml__, \"  \")")181				}182				_ => Ok(v),183			});184			let v = match v {185				Ok(v) => v,186				Err(err) => {187					print_error(&err, evaluator, &opts);188					std::process::exit(1);189				}190			};191			match v {192				Val::Str(s) => println!("{}", s),193				Val::Num(n) => println!("{}", n),194				_v => eprintln!(195					"jsonnet output is not a string.\nDid you forgot to set --format, or wrap your data with std.manifestJson?"196				),197			}198		}199		Err(err) => {200			print_error(&err, evaluator, &opts);201			std::process::exit(1);202		}203	}204}205206fn print_error(err: &LocError, evaluator: EvaluationState, opts: &Opts) {207	println!("Error: {:?}", err.0);208	print_trace(&(err.1), evaluator, &opts);209}210211fn print_syntax_error(error: jsonnet_parser::ParseError, file: &PathBuf, code: &str) {212	use annotate_snippets::{213		display_list::{DisplayList, FormatOptions},214		snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},215	};216	//&("Expected: ".to_owned() + error.expected)217	let origin = file.to_str().unwrap();218	let error_message = format!("Expected: {}", error.expected);219	let snippet = Snippet {220		opt: FormatOptions {221			color: true,222			..Default::default()223		},224		title: Some(Annotation {225			label: Some(&error_message),226			id: None,227			annotation_type: AnnotationType::Error,228		}),229		footer: vec![],230		slices: vec![Slice {231			source: &code,232			line_start: 1,233			origin: Some(origin),234			fold: false,235			annotations: vec![SourceAnnotation {236				label: "At this position",237				annotation_type: AnnotationType::Error,238				range: (error.location.offset, error.location.offset + 1),239			}],240		}],241	};242243	let dl = DisplayList::from(snippet);244	println!("{}", dl);245}246247fn print_trace(trace: &StackTrace, evaluator: EvaluationState, opts: &Opts) {248	use annotate_snippets::{249		display_list::{DisplayList, FormatOptions},250		snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},251	};252	for item in trace.0.iter() {253		let desc = &item.1;254		let source = item.0.clone();255		let code = evaluator.get_source(&source.0);256		if code.is_none() {257			continue;258		}259		let code = code.unwrap();260		let start_end = offset_to_location(&code, &[source.1, source.2]);261		if opts.trace_format == TraceFormat::Custom {262			let source_fragment: String = code263				.chars()264				.skip(start_end[0].line_start_offset)265				.take(start_end[1].line_end_offset - start_end[0].line_start_offset)266				.collect();267			let snippet = Snippet {268				opt: FormatOptions {269					color: true,270					..Default::default()271				},272				title: Some(Annotation {273					label: Some(&item.1),274					id: None,275					annotation_type: AnnotationType::Error,276				}),277				footer: vec![],278				slices: vec![Slice {279					source: &source_fragment,280					line_start: start_end[0].line,281					origin: Some(&source.0.to_str().unwrap()),282					fold: false,283					annotations: vec![SourceAnnotation {284						label: desc,285						annotation_type: AnnotationType::Error,286						range: (287							source.1 - start_end[0].line_start_offset,288							source.2 - start_end[0].line_start_offset,289						),290					}],291				}],292			};293294			let dl = DisplayList::from(snippet);295			println!("{}", dl);296		} else {297			print_jsonnet_pair(298				source.0.to_str().unwrap(),299				&start_end[0],300				&start_end[1],301				opts.trace_format == TraceFormat::GoJsonnet,302			);303		}304	}305}306307fn print_jsonnet_pair(file: &str, start: &CodeLocation, end: &CodeLocation, is_go: bool) {308	if is_go {309		print!("        ");310	} else {311		print!("  ");312	}313	print!("{}:", file);314	if start.line == end.line {315		// IDK why, but this is the behavior original jsonnet cpp impl shows316		if start.column == end.column || !is_go && start.column + 1 == end.column {317			println!("{}:{}", start.line, end.column)318		} else {319			println!("{}:{}-{}", start.line, start.column, end.column);320		}321	} else {322		println!(323			"({}:{})-({}:{})",324			start.line, end.column, start.line, end.column325		);326	}327}