git.delta.rocks / jrsonnet / refs/commits / 9411dba19aab

1use std::rc::Rc;2use std::{any::Any, cell::RefCell, future::Future};34use jrsonnet_gcmodule::Acyclic;5use jrsonnet_parser::{6	ArgsDesc, AssertExpr, AssertStmt, BindSpec, CompSpec, Destruct, Expr, FieldMember, FieldName,7	ForSpecData, IfElse, IfSpecData, ImportKind, Member, ObjBody, Param, ParamsDesc,8	ParserSettings, Slice, SliceDesc, Source, SourcePath, Spanned,9};10use rustc_hash::FxHashMap;1112use crate::{AsPathLike, FileData, ImportResolver, ResolvePathOwned, State};1314pub struct Import {15	path: ResolvePathOwned,16	expression: bool,17}1819pub struct FoundImports(Vec<Import>);2021// Visits all nodes, trying to find import statements22#[allow(clippy::too_many_lines)]23pub fn find_imports(expr: &Spanned<Expr>, out: &mut FoundImports) {24	fn in_destruct(dest: &Destruct, #[allow(unused_variables)] out: &mut FoundImports) {25		match dest {26			#[cfg(feature = "exp-destruct")]27			Destruct::Array {28				start,29				rest: _,30				end,31			} => {32				for dest in start {33					in_destruct(dest, out);34				}35				for dest in end {36					in_destruct(dest, out);37				}38			}39			#[cfg(feature = "exp-destruct")]40			Destruct::Object { fields, rest: _ } => {41				for (_, dest, default) in fields {42					if let Some(dest) = dest {43						in_destruct(dest, out);44					}45					if let Some(expr) = default {46						find_imports(expr, out);47					}48				}49			}50			#[cfg(feature = "exp-destruct")]51			Destruct::Skip => {}52			Destruct::Full(_) => {}53		}54	}55	fn in_compspec(specs: &[CompSpec], out: &mut FoundImports) {56		for spec in specs {57			match spec {58				CompSpec::IfSpec(IfSpecData(expr)) => find_imports(expr, out),59				CompSpec::ForSpec(ForSpecData(destruct, expr)) => {60					in_destruct(destruct, out);61					find_imports(expr, out);62				}63			}64		}65	}66	fn in_params(params: &ParamsDesc, out: &mut FoundImports) {67		for Param(dest, default) in &*params.0 {68			in_destruct(dest, out);69			if let Some(expr) = default {70				find_imports(expr, out);71			}72		}73	}74	fn in_bind(specs: &[BindSpec], out: &mut FoundImports) {75		for spec in specs {76			match spec {77				BindSpec::Field {78					into: dest,79					value: expr,80				} => {81					in_destruct(dest, out);82					find_imports(expr, out);83				}84				BindSpec::Function {85					name: _,86					params,87					value: expr,88				} => {89					in_params(params, out);90					find_imports(expr, out);91				}92			}93		}94	}95	fn in_args(ArgsDesc { unnamed, named }: &ArgsDesc, out: &mut FoundImports) {96		for expr in unnamed {97			find_imports(expr, out);98		}99		for (_, expr) in named {100			find_imports(expr, out);101		}102	}103	fn in_obj(obj: &ObjBody, out: &mut FoundImports) {104		match obj {105			ObjBody::MemberList(v) => {106				for member in v {107					match member {108						Member::Field(FieldMember {109							name,110							params,111							value,112							..113						}) => {114							match name {115								FieldName::Fixed(_) => {}116								FieldName::Dyn(expr) => find_imports(expr, out),117							}118							if let Some(params) = params {119								in_params(params, out);120							}121							find_imports(value, out);122						}123						Member::BindStmt(_) => todo!(),124						Member::AssertStmt(assert) => {125							find_imports(&assert.0, out);126							if let Some(expr) = &assert.1 {127								find_imports(expr, out);128							}129						}130					}131				}132			}133			ObjBody::ObjComp(_) => todo!(),134		}135	}136	match &**expr {137		Expr::Import(_, v) => {138			if let Expr::Str(s) = &***v {139				out.0.push(Import {140					path: ResolvePathOwned::Str(s.to_string()),141					expression: matches!(&**expr, Expr::Import(ImportKind::Normal, _)),142				});143			}144			// Non-string import will fail in runtime145		}146147		Expr::Literal(_) | Expr::Str(_) | Expr::Num(_) | Expr::Var(_) => {}148149		Expr::Arr(arr) => {150			for expr in &**arr {151				find_imports(expr, out);152			}153		}154		Expr::ArrComp(expr, specs) => {155			find_imports(expr, out);156			in_compspec(specs, out);157		}158		Expr::Obj(obj) => in_obj(obj, out),159		Expr::ObjExtend(expr, obj) => {160			find_imports(expr, out);161			in_obj(obj, out);162		}163		Expr::BinaryOp(binop) => {164			find_imports(&binop.lhs, out);165			find_imports(&binop.rhs, out);166		}167		Expr::AssertExpr(assert) => {168			let AssertExpr {169				assert: AssertStmt(expr, expr2),170				rest,171			} = &**assert;172			find_imports(expr, out);173			if let Some(expr) = expr2 {174				find_imports(expr, out);175			}176			find_imports(rest, out);177		}178		Expr::LocalExpr(specs, expr) => {179			in_bind(specs, out);180			find_imports(expr, out);181		}182		Expr::Apply(expr, args, _) => {183			find_imports(expr, out);184			in_args(args, out);185		}186		Expr::Index { indexable, parts } => {187			find_imports(indexable, out);188			for part in parts {189				find_imports(&part.value, out);190			}191		}192		Expr::Function(params, expr) => {193			in_params(params, out);194			find_imports(expr, out);195		}196		Expr::IfElse(if_else) => {197			let IfElse {198				cond: IfSpecData(expr),199				cond_then,200				cond_else,201			} = &**if_else;202			find_imports(expr, out);203			find_imports(cond_then, out);204			if let Some(expr) = cond_else {205				find_imports(expr, out);206			}207		}208		Expr::Slice(slice) => {209			let Slice {210				value,211				slice: SliceDesc { start, end, step },212			} = &**slice;213			find_imports(value, out);214			if let Some(expr) = start {215				find_imports(expr, out);216			}217			if let Some(expr) = end {218				find_imports(expr, out);219			}220			if let Some(expr) = step {221				find_imports(expr, out);222			}223		}224		Expr::UnaryOp(_, expr) | Expr::ErrorStmt(expr) => {225			find_imports(expr, out);226		}227	}228}229230pub trait AsyncImportResolver {231	type Error;232	/// Resolves file path, e.g. `(/home/user/manifests, b.libjsonnet)` can correspond233	/// both to `/home/user/manifests/b.libjsonnet` and to `/home/user/${vendor}/b.libjsonnet`234	/// where `${vendor}` is a library path.235	///236	/// `from` should only be returned from [`ImportResolver::resolve`],237	/// or from other defined file, any other value may result in panic238	fn resolve_from(239		&self,240		from: &SourcePath,241		path: &dyn AsPathLike,242	) -> impl Future<Output = Result<SourcePath, Self::Error>>;243	fn resolve_from_default(244		&self,245		path: &dyn AsPathLike,246	) -> impl Future<Output = Result<SourcePath, Self::Error>> {247		async { self.resolve_from(&SourcePath::default(), path).await }248	}249250	/// Load resolved file251	/// This should only be called with value returned252	/// from [`ImportResolver::resolve_file`]/[`ImportResolver::resolve`],253	/// this cannot be resolved using associated type,254	/// as the evaluator uses object instead of generic for [`ImportResolver`]255	fn load_file_contents(256		&self,257		resolved: &SourcePath,258	) -> impl Future<Output = Result<Vec<u8>, Self::Error>>;259}260261#[derive(Acyclic)]262struct ResolvedImportResolver {263	resolved: RefCell<FxHashMap<(SourcePath, ResolvePathOwned), (SourcePath, bool)>>,264}265impl ImportResolver for ResolvedImportResolver {266	fn load_file_contents(&self, _resolved: &SourcePath) -> crate::Result<Vec<u8>> {267		unreachable!("all files should be loaded at this point");268	}269270	fn resolve_from(&self, from: &SourcePath, path: &dyn AsPathLike) -> crate::Result<SourcePath> {271		Ok(self272			.resolved273			.borrow()274			.get(&(from.clone(), path.as_path().to_owned()))275			.expect("all imports should be resolved at this point")276			.0277			.clone())278	}279280	fn resolve_from_default(&self, path: &dyn AsPathLike) -> crate::Result<SourcePath> {281		self.resolve_from(&SourcePath::default(), path)282	}283}284285enum Job {286	LoadFile { path: SourcePath, parse: bool },287	ParseFile(SourcePath),288	ResolveImport { from: SourcePath, import: Import },289}290291#[allow(clippy::future_not_send)]292pub async fn async_import<H>(s: State, handler: H, path: &dyn AsPathLike) -> Result<(), H::Error>293where294	H: AsyncImportResolver,295{296	let resolved = (s.import_resolver() as &dyn Any)297		.downcast_ref::<ResolvedImportResolver>()298		.expect("for async imports, import_resolver should be set to ResolvedImportResolver");299300	let mut resolved_map = resolved.resolved.borrow_mut();301302	let mut queue = vec![Job::LoadFile {303		path: handler.resolve_from_default(path).await?,304		parse: true,305	}];306	while let Some(job) = queue.pop() {307		match job {308			Job::LoadFile { path, parse } => {309				if !s.0.file_cache.borrow().contains_key(&path) {310					let data = handler.load_file_contents(&path).await?;311					s.0.file_cache312						.borrow_mut()313						.insert(path.clone(), FileData::new_bytes(data.as_slice().into()));314				}315				if parse {316					queue.push(Job::ParseFile(path));317				}318			}319			Job::ParseFile(path) => {320				if let Some(file) = s.0.file_cache.borrow_mut().get_mut(&path) {321					if file.parsed.is_none() {322						let Some(code) = file.get_string() else {323							continue;324						};325						let source = Source::new(path.clone(), code.clone());326						// If failed - then skip import327						file.parsed = jrsonnet_parser::parse(&code, &ParserSettings { source })328							.map(Rc::new)329							.ok();330						if let Some(parsed) = &file.parsed {331							let mut imports = FoundImports(vec![]);332							find_imports(parsed, &mut imports);333							for import in imports.0 {334								queue.push(Job::ResolveImport {335									from: path.clone(),336									import,337								});338							}339						}340					}341				}342			}343			Job::ResolveImport { from, import } => {344				if let Some((resolved, expression)) =345					resolved_map.get_mut(&(from.clone(), import.path.clone()))346				{347					if import.expression && !*expression {348						*expression = true;349						queue.push(Job::ParseFile(resolved.clone()));350					}351					continue;352				}353				let resolved = handler.resolve_from(&from, &import.path).await?;354				queue.push(Job::LoadFile {355					path: resolved,356					parse: import.expression,357				});358			}359		}360	}361	Ok(())362}