git.delta.rocks / jrsonnet / refs/commits / 655108633317

1use std::{any::Any, cell::RefCell, future::Future, path::Path};23use jrsonnet_gcmodule::Acyclic;4use jrsonnet_interner::IStr;5use jrsonnet_parser::{6	ArgsDesc, AssertStmt, BindSpec, CompSpec, Destruct, Expr, FieldMember, FieldName, ForSpecData,7	IfSpecData, LocExpr, Member, ObjBody, Param, ParamsDesc, ParserSettings, SliceDesc, Source,8	SourcePath,9};10use rustc_hash::FxHashMap;1112use crate::{bail, FileData, ImportResolver, State};1314pub struct Import {15	path: IStr,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: &LocExpr, 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(AssertStmt(expr, expr2)) => {125							find_imports(expr, out);126							if let Some(expr) = expr2 {127								find_imports(expr, out);128							}129						}130					}131				}132			}133			ObjBody::ObjComp(_) => todo!(),134		}135	}136	match &*expr.expr() {137		Expr::Import(v) | Expr::ImportStr(v) | Expr::ImportBin(v) => {138			if let Expr::Str(s) = &*v.expr() {139				out.0.push(Import {140					path: s.clone(),141					expression: matches!(&*expr.expr(), Expr::Import(_)),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(a, _, b) => {164			find_imports(a, out);165			find_imports(b, out);166		}167		Expr::AssertExpr(AssertStmt(expr, expr2), then) => {168			find_imports(expr, out);169			if let Some(expr) = expr2 {170				find_imports(expr, out);171			}172			find_imports(then, out);173		}174		Expr::LocalExpr(specs, expr) => {175			in_bind(specs, out);176			find_imports(expr, out);177		}178		Expr::Apply(expr, args, _) => {179			find_imports(expr, out);180			in_args(args, out);181		}182		Expr::Index { indexable, parts } => {183			find_imports(indexable, out);184			for part in parts {185				find_imports(&part.value, out);186			}187		}188		Expr::Function(params, expr) => {189			in_params(params, out);190			find_imports(expr, out);191		}192		Expr::IfElse {193			cond: IfSpecData(expr),194			cond_then,195			cond_else,196		} => {197			find_imports(expr, out);198			find_imports(cond_then, out);199			if let Some(expr) = cond_else {200				find_imports(expr, out);201			}202		}203		Expr::Slice(expr, SliceDesc { start, end, step }) => {204			find_imports(expr, out);205			if let Some(expr) = start {206				find_imports(expr, out);207			}208			if let Some(expr) = end {209				find_imports(expr, out);210			}211			if let Some(expr) = step {212				find_imports(expr, out);213			}214		}215		Expr::Parened(expr) | Expr::UnaryOp(_, expr) | Expr::ErrorStmt(expr) => {216			find_imports(expr, out);217		}218	}219}220221pub trait AsyncImportResolver {222	type Error;223	/// Resolves file path, e.g. `(/home/user/manifests, b.libjsonnet)` can correspond224	/// both to `/home/user/manifests/b.libjsonnet` and to `/home/user/${vendor}/b.libjsonnet`225	/// where `${vendor}` is a library path.226	///227	/// `from` should only be returned from [`ImportResolver::resolve`],228	/// or from other defined file, any other value may result in panic229	fn resolve_from(230		&self,231		from: &SourcePath,232		path: &str,233	) -> impl Future<Output = Result<SourcePath, Self::Error>>;234	fn resolve_from_default(235		&self,236		path: &str,237	) -> impl Future<Output = Result<SourcePath, Self::Error>> {238		async { self.resolve_from(&SourcePath::default(), path).await }239	}240	/// Resolves absolute path, doesn't supports jpath and other fancy things241	fn resolve(&self, path: &Path) -> impl Future<Output = Result<SourcePath, Self::Error>>;242243	/// Load resolved file244	/// This should only be called with value returned245	/// from [`ImportResolver::resolve_file`]/[`ImportResolver::resolve`],246	/// this cannot be resolved using associated type,247	/// as the evaluator uses object instead of generic for [`ImportResolver`]248	fn load_file_contents(249		&self,250		resolved: &SourcePath,251	) -> impl Future<Output = Result<Vec<u8>, Self::Error>>;252}253254#[derive(Acyclic)]255struct ResolvedImportResolver {256	resolved: RefCell<FxHashMap<(SourcePath, IStr), (SourcePath, bool)>>,257}258impl ImportResolver for ResolvedImportResolver {259	fn load_file_contents(&self, _resolved: &SourcePath) -> crate::Result<Vec<u8>> {260		unreachable!("all files should be loaded at this point");261	}262263	fn resolve_from(&self, from: &SourcePath, path: &str) -> crate::Result<SourcePath> {264		Ok(self265			.resolved266			.borrow()267			.get(&(from.clone(), path.into()))268			.expect("all imports should be resolved at this point")269			.0270			.clone())271	}272273	fn resolve_from_default(&self, path: &str) -> crate::Result<SourcePath> {274		self.resolve_from(&SourcePath::default(), path)275	}276277	fn resolve(&self, path: &Path) -> crate::Result<SourcePath> {278		bail!(crate::error::ErrorKind::AbsoluteImportNotSupported(279			path.to_owned()280		))281	}282}283284enum Job {285	LoadFile { path: SourcePath, parse: bool },286	ParseFile(SourcePath),287	ResolveImport { from: SourcePath, import: Import },288}289290#[allow(clippy::future_not_send)]291pub async fn async_import<H>(s: State, handler: H, path: impl AsRef<Path>) -> Result<(), H::Error>292where293	H: AsyncImportResolver,294{295	let resolved = (s.import_resolver() as &dyn Any)296		.downcast_ref::<ResolvedImportResolver>()297		.expect("for async imports, import_resolver should be set to ResolvedImportResolver");298299	let mut resolved_map = resolved.resolved.borrow_mut();300301	let mut queue = vec![Job::LoadFile {302		path: handler.resolve(path.as_ref()).await?,303		parse: true,304	}];305	while let Some(job) = queue.pop() {306		match job {307			Job::LoadFile { path, parse } => {308				if !s.0.file_cache.borrow().contains_key(&path) {309					let data = handler.load_file_contents(&path).await?;310					s.0.file_cache311						.borrow_mut()312						.insert(path.clone(), FileData::new_bytes(data.as_slice().into()));313				}314				if parse {315					queue.push(Job::ParseFile(path));316				}317			}318			Job::ParseFile(path) => {319				if let Some(file) = s.0.file_cache.borrow_mut().get_mut(&path) {320					if file.parsed.is_none() {321						let Some(code) = file.get_string() else {322							continue;323						};324						let source = Source::new(path.clone(), code.clone());325						// If failed - then skip import326						file.parsed =327							jrsonnet_parser::parse(&code, &ParserSettings { source }).ok();328						if let Some(parsed) = &file.parsed {329							let mut imports = FoundImports(vec![]);330							find_imports(parsed, &mut imports);331							for import in imports.0 {332								queue.push(Job::ResolveImport {333									from: path.clone(),334									import,335								});336							}337						}338					}339				}340			}341			Job::ResolveImport { from, import } => {342				if let Some((resolved, expression)) =343					resolved_map.get_mut(&(from.clone(), import.path.clone()))344				{345					if import.expression && !*expression {346						*expression = true;347						queue.push(Job::ParseFile(resolved.clone()));348					}349					continue;350				}351				let resolved = handler.resolve_from(&from, &import.path).await?;352				queue.push(Job::LoadFile {353					path: resolved,354					parse: import.expression,355				});356			}357		}358	}359	Ok(())360}