mirror of https://github.com/sveltejs/svelte
1657 lines
44 KiB
1657 lines
44 KiB
import { walk } from 'estree-walker';
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import { getLocator } from 'locate-character';
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import Stats from '../Stats';
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import { reserved, is_valid } from '../utils/names';
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import globals from '../utils/globals';
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import { namespaces, valid_namespaces } from '../utils/namespaces';
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import create_module from './create_module';
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import {
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create_scopes,
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extract_names,
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Scope,
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extract_identifiers
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} from './utils/scope';
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import Stylesheet from './css/Stylesheet';
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import { test } from '../config';
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import Fragment from './nodes/Fragment';
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import internal_exports from './internal_exports';
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import { Ast, CompileOptions, Var, Warning, CssResult } from '../interfaces';
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import error from '../utils/error';
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import get_code_frame from '../utils/get_code_frame';
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import flatten_reference from './utils/flatten_reference';
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import is_used_as_reference from './utils/is_used_as_reference';
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import is_reference, { NodeWithPropertyDefinition } from 'is-reference';
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import TemplateScope from './nodes/shared/TemplateScope';
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import fuzzymatch from '../utils/fuzzymatch';
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import get_object from './utils/get_object';
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import Slot from './nodes/Slot';
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import { Node, ImportDeclaration, ExportNamedDeclaration, Identifier, ExpressionStatement, AssignmentExpression, Literal, Property, RestElement, ExportDefaultDeclaration, ExportAllDeclaration, FunctionDeclaration, FunctionExpression } from 'estree';
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import add_to_set from './utils/add_to_set';
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import check_graph_for_cycles from './utils/check_graph_for_cycles';
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import { print, b } from 'code-red';
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import { is_reserved_keyword } from './utils/reserved_keywords';
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import { apply_preprocessor_sourcemap } from '../utils/mapped_code';
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import Element from './nodes/Element';
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import { DecodedSourceMap, RawSourceMap } from '@ampproject/remapping/dist/types/types';
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import { clone } from '../utils/clone';
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import compiler_warnings from './compiler_warnings';
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import compiler_errors from './compiler_errors';
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import { extract_ignores_above_position, extract_svelte_ignore_from_comments } from '../utils/extract_svelte_ignore';
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import check_enable_sourcemap from './utils/check_enable_sourcemap';
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import is_dynamic from './render_dom/wrappers/shared/is_dynamic';
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interface ComponentOptions {
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namespace?: string;
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tag?: string;
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immutable?: boolean;
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accessors?: boolean;
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preserveWhitespace?: boolean;
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}
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const regex_leading_directory_separator = /^[/\\]/;
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const regex_starts_with_term_export = /^Export/;
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const regex_contains_term_function = /Function/;
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export default class Component {
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stats: Stats;
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warnings: Warning[];
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ignores: Set<string>;
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ignore_stack: Array<Set<string>> = [];
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ast: Ast;
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original_ast: Ast;
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source: string;
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name: Identifier;
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compile_options: CompileOptions;
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fragment: Fragment;
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module_scope: Scope;
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instance_scope: Scope;
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instance_scope_map: WeakMap<Node, Scope>;
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component_options: ComponentOptions;
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namespace: string;
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tag: string;
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accessors: boolean;
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vars: Var[] = [];
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var_lookup: Map<string, Var> = new Map();
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imports: ImportDeclaration[] = [];
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exports_from: ExportNamedDeclaration[] = [];
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instance_exports_from: ExportNamedDeclaration[] = [];
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hoistable_nodes: Set<Node> = new Set();
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node_for_declaration: Map<string, Node> = new Map();
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partly_hoisted: Array<(Node | Node[])> = [];
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fully_hoisted: Array<(Node | Node[])> = [];
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reactive_declarations: Array<{
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assignees: Set<string>;
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dependencies: Set<string>;
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node: Node;
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declaration: Node;
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}> = [];
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reactive_declaration_nodes: Set<Node> = new Set();
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has_reactive_assignments = false;
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injected_reactive_declaration_vars: Set<string> = new Set();
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helpers: Map<string, Identifier> = new Map();
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globals: Map<string, Identifier> = new Map();
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indirect_dependencies: Map<string, Set<string>> = new Map();
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file: string;
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locate: (c: number) => { line: number; column: number };
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elements: Element[] = [];
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stylesheet: Stylesheet;
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aliases: Map<string, Identifier> = new Map();
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used_names: Set<string> = new Set();
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globally_used_names: Set<string> = new Set();
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slots: Map<string, Slot> = new Map();
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slot_outlets: Set<string> = new Set();
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constructor(
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ast: Ast,
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source: string,
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name: string,
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compile_options: CompileOptions,
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stats: Stats,
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warnings: Warning[]
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) {
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this.name = { type: 'Identifier', name };
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this.stats = stats;
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this.warnings = warnings;
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this.ast = ast;
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this.source = source;
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this.compile_options = compile_options;
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// the instance JS gets mutated, so we park
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// a copy here for later. TODO this feels gross
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this.original_ast = clone({
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html: ast.html,
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css: ast.css,
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instance: ast.instance,
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module: ast.module
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});
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this.file =
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compile_options.filename &&
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(typeof process !== 'undefined'
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? compile_options.filename
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.replace(process.cwd(), '')
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.replace(regex_leading_directory_separator, '')
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: compile_options.filename);
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this.locate = getLocator(this.source, { offsetLine: 1 });
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// styles
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this.stylesheet = new Stylesheet({
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source,
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ast,
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filename: compile_options.filename,
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component_name: name,
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dev: compile_options.dev,
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get_css_hash: compile_options.cssHash
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});
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this.stylesheet.validate(this);
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this.component_options = process_component_options(
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this,
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this.ast.html.children
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);
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this.namespace =
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namespaces[this.component_options.namespace] ||
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this.component_options.namespace;
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if (compile_options.customElement) {
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if (
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this.component_options.tag === undefined &&
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compile_options.tag === undefined
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) {
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const svelteOptions = ast.html.children.find(
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child => child.name === 'svelte:options'
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) || { start: 0, end: 0 };
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this.warn(svelteOptions, compiler_warnings.custom_element_no_tag);
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}
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this.tag = this.component_options.tag || compile_options.tag;
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} else {
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this.tag = this.name.name;
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}
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this.walk_module_js();
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this.push_ignores(this.ast.instance ? extract_ignores_above_position(this.ast.instance.start, this.ast.html.children) : []);
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this.walk_instance_js_pre_template();
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this.pop_ignores();
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this.fragment = new Fragment(this, ast.html);
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this.name = this.get_unique_name(name);
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this.push_ignores(this.ast.instance ? extract_ignores_above_position(this.ast.instance.start, this.ast.html.children) : []);
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this.walk_instance_js_post_template();
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this.pop_ignores();
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this.elements.forEach(element => this.stylesheet.apply(element));
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if (!compile_options.customElement) this.stylesheet.reify();
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this.stylesheet.warn_on_unused_selectors(this);
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}
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add_var(node: Node, variable: Var, add_to_lookup = true) {
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this.vars.push(variable);
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if (add_to_lookup) {
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if (this.var_lookup.has(variable.name)) {
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const exists_var = this.var_lookup.get(variable.name);
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if (exists_var.module && exists_var.imported) {
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this.error(node as any, compiler_errors.illegal_variable_declaration);
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}
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}
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this.var_lookup.set(variable.name, variable);
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}
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}
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add_reference(node: Node, name: string) {
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const variable = this.var_lookup.get(name);
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if (variable) {
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variable.referenced = true;
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} else if (is_reserved_keyword(name)) {
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this.add_var(node, {
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name,
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injected: true,
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referenced: true
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});
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} else if (name[0] === '$') {
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this.add_var(node, {
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name,
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injected: true,
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referenced: true,
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mutated: true,
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writable: true
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});
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const subscribable_name = name.slice(1);
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const variable = this.var_lookup.get(subscribable_name);
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if (variable) {
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variable.referenced = true;
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variable.subscribable = true;
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}
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} else {
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if (this.compile_options.varsReport === 'full') {
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this.add_var(node, { name, referenced: true }, false);
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}
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this.used_names.add(name);
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}
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}
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alias(name: string) {
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if (!this.aliases.has(name)) {
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this.aliases.set(name, this.get_unique_name(name));
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}
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return this.aliases.get(name);
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}
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apply_stylesheet(element: Element) {
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this.elements.push(element);
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}
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global(name: string) {
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const alias = this.alias(name);
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this.globals.set(name, alias);
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return alias;
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}
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generate(result?: { js: Node[]; css: CssResult }) {
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let js = null;
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let css = null;
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if (result) {
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const { compile_options, name } = this;
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const { format = 'esm' } = compile_options;
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const banner = `${this.file ? `${this.file} ` : ''}generated by Svelte v${'__VERSION__'}`;
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const program: any = { type: 'Program', body: result.js };
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walk(program, {
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enter: (node: Node, parent: Node, key) => {
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if (node.type === 'Identifier') {
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if (node.name[0] === '@') {
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if (node.name[1] === '_') {
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const alias = this.global(node.name.slice(2));
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node.name = alias.name;
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} else {
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let name = node.name.slice(1);
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if (compile_options.hydratable) {
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if (internal_exports.has(`${name}_hydration`)) {
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name += '_hydration';
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} else if (internal_exports.has(`${name}Hydration`)) {
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name += 'Hydration';
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}
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}
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if (compile_options.dev) {
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if (internal_exports.has(`${name}_dev`)) {
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name += '_dev';
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} else if (internal_exports.has(`${name}Dev`)) {
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name += 'Dev';
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}
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}
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const alias = this.alias(name);
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this.helpers.set(name, alias);
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node.name = alias.name;
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}
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} else if (node.name[0] !== '#' && !is_valid(node.name)) {
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// this hack allows x`foo.${bar}` where bar could be invalid
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const literal: Literal = { type: 'Literal', value: node.name };
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if (parent.type === 'Property' && key === 'key') {
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parent.key = literal;
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} else if (parent.type === 'MemberExpression' && key === 'property') {
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parent.property = literal;
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parent.computed = true;
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}
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}
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}
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}
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});
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const referenced_globals = Array.from(
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this.globals,
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([name, alias]) => name !== alias.name && { name, alias }
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).filter(Boolean);
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if (referenced_globals.length) {
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this.helpers.set('globals', this.alias('globals'));
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}
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const imported_helpers = Array.from(this.helpers, ([name, alias]) => ({
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name,
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alias
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}));
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create_module(
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program,
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format,
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name,
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banner,
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compile_options.sveltePath,
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imported_helpers,
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referenced_globals,
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this.imports,
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this.vars
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.filter(variable => variable.module && variable.export_name)
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.map(variable => ({
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name: variable.name,
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as: variable.export_name
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})),
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this.exports_from
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);
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css = compile_options.customElement
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? { code: null, map: null }
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: result.css;
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const js_sourcemap_enabled = check_enable_sourcemap(compile_options.enableSourcemap, 'js');
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if (!js_sourcemap_enabled) {
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js = print(program);
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js.map = null;
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} else {
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const sourcemap_source_filename = get_sourcemap_source_filename(compile_options);
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js = print(program, {
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sourceMapSource: sourcemap_source_filename
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});
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js.map.sources = [
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sourcemap_source_filename
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];
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js.map.sourcesContent = [
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this.source
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];
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js.map = apply_preprocessor_sourcemap(sourcemap_source_filename, js.map, compile_options.sourcemap as (string | RawSourceMap | DecodedSourceMap));
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}
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}
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return {
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js,
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css,
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ast: this.original_ast,
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warnings: this.warnings,
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vars: this.get_vars_report(),
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stats: this.stats.render()
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};
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}
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get_unique_name(name: string, scope?: Scope): Identifier {
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if (test) name = `${name}$`;
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let alias = name;
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for (
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let i = 1;
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reserved.has(alias) ||
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this.var_lookup.has(alias) ||
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this.used_names.has(alias) ||
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this.globally_used_names.has(alias) ||
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(scope && scope.has(alias));
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alias = `${name}_${i++}`
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);
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this.used_names.add(alias);
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return { type: 'Identifier', name: alias };
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}
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get_unique_name_maker() {
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const local_used_names = new Set();
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function add(name: string) {
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local_used_names.add(name);
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}
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reserved.forEach(add);
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internal_exports.forEach(add);
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this.var_lookup.forEach((_value, key) => add(key));
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return (name: string): Identifier => {
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if (test) name = `${name}$`;
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let alias = name;
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for (
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let i = 1;
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this.used_names.has(alias) || local_used_names.has(alias);
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alias = `${name}_${i++}`
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);
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local_used_names.add(alias);
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this.globally_used_names.add(alias);
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return {
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type: 'Identifier',
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name: alias
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};
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};
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}
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get_vars_report(): Var[] {
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const { compile_options, vars } = this;
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const vars_report = compile_options.varsReport === false
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? []
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: compile_options.varsReport === 'full'
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? vars
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: vars.filter(v => !v.global && !v.internal);
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return vars_report.map(v => ({
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name: v.name,
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export_name: v.export_name || null,
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injected: v.injected || false,
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module: v.module || false,
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mutated: v.mutated || false,
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reassigned: v.reassigned || false,
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referenced: v.referenced || false,
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writable: v.writable || false,
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referenced_from_script: v.referenced_from_script || false
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}));
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}
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error(
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pos: {
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start: number;
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end: number;
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},
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e: {
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code: string;
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message: string;
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}
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) {
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if (this.compile_options.errorMode === 'warn') {
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this.warn(pos, e);
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} else {
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error(e.message, {
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name: 'ValidationError',
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code: e.code,
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source: this.source,
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start: pos.start,
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end: pos.end,
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filename: this.compile_options.filename
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});
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}
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}
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warn(
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pos: {
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start: number;
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end: number;
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},
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warning: {
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code: string;
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message: string;
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}
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) {
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if (this.ignores && this.ignores.has(warning.code)) {
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return;
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}
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const start = this.locate(pos.start);
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const end = this.locate(pos.end);
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const frame = get_code_frame(this.source, start.line - 1, start.column);
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this.warnings.push({
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code: warning.code,
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message: warning.message,
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frame,
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start,
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end,
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pos: pos.start,
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filename: this.compile_options.filename,
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toString: () =>
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`${warning.message} (${start.line}:${start.column})\n${frame}`
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});
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}
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extract_imports(node) {
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this.imports.push(node);
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}
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extract_exports(node, module_script = false) {
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|
const ignores = extract_svelte_ignore_from_comments(node);
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if (ignores.length) this.push_ignores(ignores);
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const result = this._extract_exports(node, module_script);
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if (ignores.length) this.pop_ignores();
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return result;
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}
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private _extract_exports(node: ExportDefaultDeclaration | ExportNamedDeclaration | ExportAllDeclaration, module_script: boolean) {
|
|
if (node.type === 'ExportDefaultDeclaration') {
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return this.error(node as any, compiler_errors.default_export);
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}
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|
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if (node.type === 'ExportNamedDeclaration') {
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|
if (node.source) {
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if (module_script) {
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this.exports_from.push(node);
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} else {
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this.instance_exports_from.push(node);
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}
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return null;
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}
|
|
if (node.declaration) {
|
|
if (node.declaration.type === 'VariableDeclaration') {
|
|
node.declaration.declarations.forEach(declarator => {
|
|
extract_names(declarator.id).forEach(name => {
|
|
const variable = this.var_lookup.get(name);
|
|
variable.export_name = name;
|
|
if (!module_script && variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
|
|
this.warn(declarator as any, compiler_warnings.unused_export_let(this.name.name, name));
|
|
}
|
|
});
|
|
});
|
|
} else {
|
|
const { name } = node.declaration.id;
|
|
|
|
const variable = this.var_lookup.get(name);
|
|
variable.export_name = name;
|
|
}
|
|
|
|
return node.declaration;
|
|
} else {
|
|
node.specifiers.forEach(specifier => {
|
|
const variable = this.var_lookup.get(specifier.local.name);
|
|
|
|
if (variable) {
|
|
variable.export_name = specifier.exported.name;
|
|
|
|
if (!module_script && variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
|
|
this.warn(specifier as any, compiler_warnings.unused_export_let(this.name.name, specifier.exported.name));
|
|
}
|
|
}
|
|
});
|
|
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
extract_javascript(script) {
|
|
if (!script) return null;
|
|
|
|
return script.content.body.filter(node => {
|
|
if (!node) return false;
|
|
if (this.hoistable_nodes.has(node)) return false;
|
|
if (this.reactive_declaration_nodes.has(node)) return false;
|
|
if (node.type === 'ImportDeclaration') return false;
|
|
if (node.type === 'ExportDeclaration' && node.specifiers.length > 0) return false;
|
|
return true;
|
|
});
|
|
}
|
|
|
|
walk_module_js() {
|
|
const component = this;
|
|
const script = this.ast.module;
|
|
if (!script) return;
|
|
|
|
walk(script.content, {
|
|
enter(node: Node) {
|
|
if (node.type === 'LabeledStatement' && node.label.name === '$') {
|
|
component.warn(node as any, compiler_warnings.module_script_reactive_declaration);
|
|
}
|
|
}
|
|
});
|
|
|
|
const { scope, globals } = create_scopes(script.content);
|
|
this.module_scope = scope;
|
|
|
|
scope.declarations.forEach((node, name) => {
|
|
if (name[0] === '$') {
|
|
return this.error(node as any, compiler_errors.illegal_declaration);
|
|
}
|
|
|
|
const writable = node.type === 'VariableDeclaration' && (node.kind === 'var' || node.kind === 'let');
|
|
const imported = node.type.startsWith('Import');
|
|
|
|
this.add_var(node, {
|
|
name,
|
|
module: true,
|
|
hoistable: true,
|
|
writable,
|
|
imported
|
|
});
|
|
});
|
|
|
|
globals.forEach((node, name) => {
|
|
if (name[0] === '$') {
|
|
return this.error(node as any, compiler_errors.illegal_subscription);
|
|
} else {
|
|
this.add_var(node, {
|
|
name,
|
|
global: true,
|
|
hoistable: true
|
|
});
|
|
}
|
|
});
|
|
|
|
const { body } = script.content;
|
|
let i = body.length;
|
|
while (--i >= 0) {
|
|
const node = body[i];
|
|
if (node.type === 'ImportDeclaration') {
|
|
this.extract_imports(node);
|
|
body.splice(i, 1);
|
|
}
|
|
|
|
if (regex_starts_with_term_export.test(node.type)) {
|
|
const replacement = this.extract_exports(node, true);
|
|
if (replacement) {
|
|
body[i] = replacement;
|
|
} else {
|
|
body.splice(i, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
walk_instance_js_pre_template() {
|
|
const script = this.ast.instance;
|
|
if (!script) return;
|
|
|
|
// inject vars for reactive declarations
|
|
script.content.body.forEach(node => {
|
|
if (node.type !== 'LabeledStatement') return;
|
|
if (node.body.type !== 'ExpressionStatement') return;
|
|
|
|
const { expression } = node.body;
|
|
if (expression.type !== 'AssignmentExpression') return;
|
|
if (expression.left.type === 'MemberExpression') return;
|
|
|
|
extract_names(expression.left).forEach(name => {
|
|
if (!this.var_lookup.has(name) && name[0] !== '$') {
|
|
this.injected_reactive_declaration_vars.add(name);
|
|
}
|
|
});
|
|
});
|
|
|
|
const { scope: instance_scope, map, globals } = create_scopes(
|
|
script.content
|
|
);
|
|
this.instance_scope = instance_scope;
|
|
this.instance_scope_map = map;
|
|
|
|
instance_scope.declarations.forEach((node, name) => {
|
|
if (name[0] === '$') {
|
|
return this.error(node as any, compiler_errors.illegal_declaration);
|
|
}
|
|
|
|
const writable = node.type === 'VariableDeclaration' && (node.kind === 'var' || node.kind === 'let');
|
|
const imported = node.type.startsWith('Import');
|
|
|
|
this.add_var(node, {
|
|
name,
|
|
initialised: instance_scope.initialised_declarations.has(name),
|
|
writable,
|
|
imported
|
|
});
|
|
|
|
this.node_for_declaration.set(name, node);
|
|
});
|
|
|
|
// NOTE: add store variable first, then only $store value
|
|
// as `$store` will mark `store` variable as referenced and subscribable
|
|
const global_keys = Array.from(globals.keys());
|
|
const sorted_globals = [
|
|
...global_keys.filter(key => key[0] !== '$'),
|
|
...global_keys.filter(key => key[0] === '$')
|
|
];
|
|
|
|
sorted_globals.forEach(name => {
|
|
if (this.var_lookup.has(name)) return;
|
|
const node = globals.get(name);
|
|
|
|
if (this.injected_reactive_declaration_vars.has(name)) {
|
|
this.add_var(node, {
|
|
name,
|
|
injected: true,
|
|
writable: true,
|
|
reassigned: true,
|
|
initialised: true
|
|
});
|
|
} else if (is_reserved_keyword(name)) {
|
|
this.add_var(node, {
|
|
name,
|
|
injected: true
|
|
});
|
|
} else if (name[0] === '$') {
|
|
if (name === '$' || name[1] === '$') {
|
|
return this.error(node as any, compiler_errors.illegal_global(name));
|
|
}
|
|
|
|
this.add_var(node, {
|
|
name,
|
|
injected: true,
|
|
mutated: true,
|
|
writable: true
|
|
});
|
|
|
|
this.add_reference(node, name.slice(1));
|
|
|
|
const variable = this.var_lookup.get(name.slice(1));
|
|
if (variable) {
|
|
variable.subscribable = true;
|
|
variable.referenced_from_script = true;
|
|
}
|
|
} else {
|
|
this.add_var(node, {
|
|
name,
|
|
global: true,
|
|
hoistable: true
|
|
});
|
|
}
|
|
});
|
|
|
|
this.track_references_and_mutations();
|
|
}
|
|
|
|
walk_instance_js_post_template() {
|
|
const script = this.ast.instance;
|
|
if (!script) return;
|
|
|
|
this.post_template_walk();
|
|
|
|
this.hoist_instance_declarations();
|
|
this.extract_reactive_declarations();
|
|
}
|
|
|
|
post_template_walk() {
|
|
const script = this.ast.instance;
|
|
if (!script) return;
|
|
|
|
const component = this;
|
|
const { content } = script;
|
|
const { instance_scope, instance_scope_map: map } = this;
|
|
|
|
let scope = instance_scope;
|
|
|
|
const to_remove = [];
|
|
const remove = (parent, prop, index) => {
|
|
to_remove.unshift([parent, prop, index]);
|
|
};
|
|
let scope_updated = false;
|
|
|
|
const current_function_stack = [];
|
|
let current_function: FunctionDeclaration | FunctionExpression = null;
|
|
|
|
walk(content, {
|
|
enter(node: Node, parent: Node, prop, index) {
|
|
if ((node.type === 'FunctionDeclaration' || node.type === 'FunctionExpression')) {
|
|
current_function_stack.push(current_function = node);
|
|
}
|
|
|
|
if (map.has(node)) {
|
|
scope = map.get(node);
|
|
}
|
|
|
|
let deep = false;
|
|
let names: string[] = [];
|
|
|
|
if (node.type === 'AssignmentExpression') {
|
|
if (node.left.type === 'ArrayPattern') {
|
|
walk(node.left, {
|
|
enter(node: Node, parent: Node) {
|
|
if (node.type === 'Identifier' &&
|
|
parent.type !== 'MemberExpression' &&
|
|
(parent.type !== 'AssignmentPattern' || parent.right !== node)) {
|
|
names.push(node.name);
|
|
}
|
|
}
|
|
});
|
|
} else {
|
|
deep = node.left.type === 'MemberExpression';
|
|
names = deep
|
|
? [get_object(node.left).name]
|
|
: extract_names(node.left);
|
|
}
|
|
} else if (node.type === 'UpdateExpression') {
|
|
deep = node.argument.type === 'MemberExpression';
|
|
const { name } = get_object(node.argument);
|
|
names.push(name);
|
|
}
|
|
if (names.length > 0) {
|
|
names.forEach(name => {
|
|
let current_scope = scope;
|
|
let declaration;
|
|
|
|
while (current_scope) {
|
|
if (current_scope.declarations.has(name)) {
|
|
declaration = current_scope.declarations.get(name);
|
|
break;
|
|
}
|
|
current_scope = current_scope.parent;
|
|
}
|
|
|
|
if (declaration && declaration.kind === 'const' && !deep) {
|
|
component.error(node as any, {
|
|
code: 'assignment-to-const',
|
|
message: 'You are assigning to a const'
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
if (node.type === 'ImportDeclaration') {
|
|
component.extract_imports(node);
|
|
// TODO: to use actual remove
|
|
remove(parent, prop, index);
|
|
return this.skip();
|
|
}
|
|
|
|
if (regex_starts_with_term_export.test(node.type)) {
|
|
const replacement = component.extract_exports(node);
|
|
if (replacement) {
|
|
this.replace(replacement);
|
|
} else {
|
|
// TODO: to use actual remove
|
|
remove(parent, prop, index);
|
|
}
|
|
return this.skip();
|
|
}
|
|
|
|
component.warn_on_undefined_store_value_references(node, parent, prop, scope);
|
|
},
|
|
|
|
leave(node: Node) {
|
|
if ((node.type === 'FunctionDeclaration' || node.type === 'FunctionExpression')) {
|
|
current_function_stack.pop();
|
|
current_function = current_function_stack[current_function_stack.length - 1];
|
|
}
|
|
|
|
// do it on leave, to prevent infinite loop
|
|
if (component.compile_options.dev && component.compile_options.loopGuardTimeout > 0 && (!current_function || (!current_function.generator && !current_function.async))) {
|
|
const to_replace_for_loop_protect = component.loop_protect(node, scope, component.compile_options.loopGuardTimeout);
|
|
if (to_replace_for_loop_protect) {
|
|
this.replace(to_replace_for_loop_protect);
|
|
scope_updated = true;
|
|
}
|
|
}
|
|
|
|
if (map.has(node)) {
|
|
scope = scope.parent;
|
|
}
|
|
}
|
|
});
|
|
|
|
for (const [parent, prop, index] of to_remove) {
|
|
if (parent) {
|
|
if (index !== null) {
|
|
parent[prop].splice(index, 1);
|
|
} else {
|
|
delete parent[prop];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (scope_updated) {
|
|
const { scope, map } = create_scopes(script.content);
|
|
this.instance_scope = scope;
|
|
this.instance_scope_map = map;
|
|
}
|
|
}
|
|
|
|
track_references_and_mutations() {
|
|
const script = this.ast.instance;
|
|
if (!script) return;
|
|
|
|
const component = this;
|
|
const { content } = script;
|
|
const { instance_scope, module_scope, instance_scope_map: map } = this;
|
|
|
|
let scope = instance_scope;
|
|
|
|
walk(content, {
|
|
enter(node: Node, parent: Node) {
|
|
if (map.has(node)) {
|
|
scope = map.get(node);
|
|
}
|
|
|
|
if (node.type === 'AssignmentExpression' || node.type === 'UpdateExpression') {
|
|
const assignee = node.type === 'AssignmentExpression' ? node.left : node.argument;
|
|
const names = extract_names(assignee as Node);
|
|
|
|
const deep = assignee.type === 'MemberExpression';
|
|
|
|
names.forEach(name => {
|
|
const scope_owner = scope.find_owner(name);
|
|
if (
|
|
scope_owner !== null
|
|
? scope_owner === instance_scope
|
|
: module_scope && module_scope.has(name)
|
|
) {
|
|
const variable = component.var_lookup.get(name);
|
|
variable[deep ? 'mutated' : 'reassigned'] = true;
|
|
}
|
|
});
|
|
}
|
|
|
|
if (is_used_as_reference(node, parent)) {
|
|
const object = get_object(node);
|
|
if (scope.find_owner(object.name) === instance_scope) {
|
|
const variable = component.var_lookup.get(object.name);
|
|
variable.referenced_from_script = true;
|
|
}
|
|
}
|
|
},
|
|
|
|
leave(node: Node) {
|
|
if (map.has(node)) {
|
|
scope = scope.parent;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
warn_on_undefined_store_value_references(node: Node, parent: Node, prop: string | number | symbol, scope: Scope) {
|
|
if (
|
|
node.type === 'LabeledStatement' &&
|
|
node.label.name === '$' &&
|
|
parent.type !== 'Program'
|
|
) {
|
|
this.warn(node as any, compiler_warnings.non_top_level_reactive_declaration);
|
|
}
|
|
|
|
if (is_reference(node as NodeWithPropertyDefinition, parent as NodeWithPropertyDefinition)) {
|
|
const object = get_object(node);
|
|
const { name } = object;
|
|
|
|
if (name[0] === '$') {
|
|
if (!scope.has(name)) {
|
|
this.warn_if_undefined(name, object, null);
|
|
}
|
|
|
|
if (name[1] !== '$' && scope.has(name.slice(1)) && scope.find_owner(name.slice(1)) !== this.instance_scope) {
|
|
if (!((regex_contains_term_function.test(parent.type) && prop === 'params') || (parent.type === 'VariableDeclarator' && prop === 'id'))) {
|
|
return this.error(node as any, compiler_errors.contextual_store);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
loop_protect(node, scope: Scope, timeout: number): Node | null {
|
|
if (node.type === 'WhileStatement' ||
|
|
node.type === 'ForStatement' ||
|
|
node.type === 'DoWhileStatement') {
|
|
const guard = this.get_unique_name('guard', scope);
|
|
this.used_names.add(guard.name);
|
|
|
|
const before = b`const ${guard} = @loop_guard(${timeout})`;
|
|
const inside = b`${guard}();`;
|
|
|
|
// wrap expression statement with BlockStatement
|
|
if (node.body.type !== 'BlockStatement') {
|
|
node.body = {
|
|
type: 'BlockStatement',
|
|
body: [node.body]
|
|
};
|
|
}
|
|
node.body.body.push(inside[0]);
|
|
|
|
return {
|
|
type: 'BlockStatement',
|
|
body: [
|
|
before[0],
|
|
node
|
|
]
|
|
};
|
|
}
|
|
return null;
|
|
}
|
|
|
|
rewrite_props(get_insert: (variable: Var) => Node[]) {
|
|
if (!this.ast.instance) return;
|
|
|
|
const component = this;
|
|
const { instance_scope, instance_scope_map: map } = this;
|
|
let scope = instance_scope;
|
|
|
|
walk(this.ast.instance.content, {
|
|
enter(node: Node) {
|
|
if (regex_contains_term_function.test(node.type)) {
|
|
return this.skip();
|
|
}
|
|
|
|
if (map.has(node)) {
|
|
scope = map.get(node);
|
|
}
|
|
|
|
if (node.type === 'ExportNamedDeclaration' && node.declaration) {
|
|
return this.replace(node.declaration);
|
|
}
|
|
|
|
if (node.type === 'VariableDeclaration') {
|
|
// NOTE: `var` does not follow block scoping
|
|
if (node.kind === 'var' || scope === instance_scope) {
|
|
const inserts = [];
|
|
const props = [];
|
|
|
|
function add_new_props(exported, local, default_value) {
|
|
props.push({
|
|
type: 'Property',
|
|
method: false,
|
|
shorthand: false,
|
|
computed: false,
|
|
kind: 'init',
|
|
key: exported,
|
|
value: default_value
|
|
? {
|
|
type: 'AssignmentPattern',
|
|
left: local,
|
|
right: default_value
|
|
}
|
|
: local
|
|
});
|
|
}
|
|
|
|
// transform
|
|
// ```
|
|
// export let { x, y = 123 } = OBJ, z = 456
|
|
// ```
|
|
// into
|
|
// ```
|
|
// let { x: x$, y: y$ = 123 } = OBJ;
|
|
// let { x = x$, y = y$, z = 456 } = $$props;
|
|
// ```
|
|
for (let index = 0; index < node.declarations.length; index++) {
|
|
const declarator = node.declarations[index];
|
|
if (declarator.id.type !== 'Identifier') {
|
|
function get_new_name(local) {
|
|
const variable = component.var_lookup.get(local.name);
|
|
if (variable.subscribable) {
|
|
inserts.push(get_insert(variable));
|
|
}
|
|
|
|
if (variable.export_name && variable.writable) {
|
|
const alias_name = component.get_unique_name(local.name);
|
|
add_new_props({ type: 'Identifier', name: variable.export_name }, local, alias_name);
|
|
return alias_name;
|
|
}
|
|
return local;
|
|
}
|
|
|
|
function rename_identifiers(param: Node) {
|
|
switch (param.type) {
|
|
case 'ObjectPattern': {
|
|
const handle_prop = (prop: Property | RestElement) => {
|
|
if (prop.type === 'RestElement') {
|
|
rename_identifiers(prop);
|
|
} else if (prop.value.type === 'Identifier') {
|
|
prop.value = get_new_name(prop.value);
|
|
} else {
|
|
rename_identifiers(prop.value);
|
|
}
|
|
};
|
|
|
|
param.properties.forEach(handle_prop);
|
|
break;
|
|
}
|
|
case 'ArrayPattern': {
|
|
const handle_element = (element: Node, index: number, array: Node[]) => {
|
|
if (element) {
|
|
if (element.type === 'Identifier') {
|
|
array[index] = get_new_name(element);
|
|
} else {
|
|
rename_identifiers(element);
|
|
}
|
|
}
|
|
};
|
|
|
|
param.elements.forEach(handle_element);
|
|
break;
|
|
}
|
|
|
|
case 'RestElement':
|
|
param.argument = get_new_name(param.argument);
|
|
break;
|
|
|
|
case 'AssignmentPattern':
|
|
if (param.left.type === 'Identifier') {
|
|
param.left = get_new_name(param.left);
|
|
} else {
|
|
rename_identifiers(param.left);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
rename_identifiers(declarator.id);
|
|
} else {
|
|
const { name } = declarator.id;
|
|
const variable = component.var_lookup.get(name);
|
|
const is_props = variable.export_name && variable.writable;
|
|
if (is_props) {
|
|
add_new_props({ type: 'Identifier', name: variable.export_name }, declarator.id, declarator.init);
|
|
node.declarations.splice(index--, 1);
|
|
}
|
|
if (variable.subscribable && (is_props || declarator.init)) {
|
|
inserts.push(get_insert(variable));
|
|
}
|
|
}
|
|
}
|
|
|
|
this.replace(b`
|
|
${node.declarations.length ? node : null}
|
|
${ props.length > 0 && b`let { ${props} } = $$props;`}
|
|
${inserts}
|
|
` as any);
|
|
return this.skip();
|
|
}
|
|
}
|
|
},
|
|
|
|
leave(node: Node) {
|
|
if (map.has(node)) {
|
|
scope = scope.parent;
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
hoist_instance_declarations() {
|
|
// we can safely hoist variable declarations that are
|
|
// initialised to literals, and functions that don't
|
|
// reference instance variables other than other
|
|
// hoistable functions. TODO others?
|
|
|
|
const {
|
|
hoistable_nodes,
|
|
var_lookup,
|
|
injected_reactive_declaration_vars,
|
|
imports
|
|
} = this;
|
|
|
|
const top_level_function_declarations = new Map();
|
|
|
|
const { body } = this.ast.instance.content;
|
|
|
|
for (let i = 0; i < body.length; i += 1) {
|
|
const node = body[i];
|
|
|
|
if (node.type === 'VariableDeclaration') {
|
|
const all_hoistable = node.declarations.every(d => {
|
|
if (!d.init) return false;
|
|
if (d.init.type !== 'Literal') return false;
|
|
|
|
// everything except const values can be changed by e.g. svelte devtools
|
|
// which means we can't hoist it
|
|
if (node.kind !== 'const' && this.compile_options.dev) return false;
|
|
|
|
const { name } = d.id as Identifier;
|
|
|
|
const v = this.var_lookup.get(name);
|
|
if (v.reassigned) return false;
|
|
if (v.export_name) return false;
|
|
|
|
if (this.var_lookup.get(name).reassigned) return false;
|
|
if (
|
|
this.vars.find(
|
|
variable => variable.name === name && variable.module
|
|
)
|
|
) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
});
|
|
|
|
if (all_hoistable) {
|
|
node.declarations.forEach(d => {
|
|
const variable = this.var_lookup.get((d.id as Identifier).name);
|
|
variable.hoistable = true;
|
|
});
|
|
|
|
hoistable_nodes.add(node);
|
|
|
|
body.splice(i--, 1);
|
|
this.fully_hoisted.push(node);
|
|
}
|
|
}
|
|
|
|
if (
|
|
node.type === 'ExportNamedDeclaration' &&
|
|
node.declaration &&
|
|
node.declaration.type === 'FunctionDeclaration'
|
|
) {
|
|
top_level_function_declarations.set(node.declaration.id.name, node);
|
|
}
|
|
|
|
if (node.type === 'FunctionDeclaration') {
|
|
top_level_function_declarations.set(node.id.name, node);
|
|
}
|
|
}
|
|
|
|
const checked = new Set();
|
|
const walking = new Set();
|
|
|
|
const is_hoistable = fn_declaration => {
|
|
if (fn_declaration.type === 'ExportNamedDeclaration') {
|
|
fn_declaration = fn_declaration.declaration;
|
|
}
|
|
|
|
const instance_scope = this.instance_scope;
|
|
let scope = this.instance_scope;
|
|
const map = this.instance_scope_map;
|
|
|
|
let hoistable = true;
|
|
|
|
// handle cycles
|
|
walking.add(fn_declaration);
|
|
|
|
walk(fn_declaration, {
|
|
enter(node: Node, parent) {
|
|
if (!hoistable) return this.skip();
|
|
|
|
if (map.has(node)) {
|
|
scope = map.get(node);
|
|
}
|
|
|
|
if (is_reference(node as NodeWithPropertyDefinition, parent as NodeWithPropertyDefinition)) {
|
|
const { name } = flatten_reference(node);
|
|
const owner = scope.find_owner(name);
|
|
|
|
if (injected_reactive_declaration_vars.has(name)) {
|
|
hoistable = false;
|
|
} else if (name[0] === '$' && !owner) {
|
|
hoistable = false;
|
|
} else if (owner === instance_scope) {
|
|
const variable = var_lookup.get(name);
|
|
|
|
if (variable.reassigned || variable.mutated) hoistable = false;
|
|
|
|
if (name === fn_declaration.id.name) return;
|
|
|
|
if (variable.hoistable) return;
|
|
|
|
if (top_level_function_declarations.has(name)) {
|
|
const other_declaration = top_level_function_declarations.get(
|
|
name
|
|
);
|
|
|
|
if (walking.has(other_declaration)) {
|
|
hoistable = false;
|
|
} else if (
|
|
other_declaration.type === 'ExportNamedDeclaration' &&
|
|
walking.has(other_declaration.declaration)
|
|
) {
|
|
hoistable = false;
|
|
} else if (!is_hoistable(other_declaration)) {
|
|
hoistable = false;
|
|
}
|
|
} else {
|
|
hoistable = false;
|
|
}
|
|
}
|
|
|
|
this.skip();
|
|
}
|
|
},
|
|
|
|
leave(node: Node) {
|
|
if (map.has(node)) {
|
|
scope = scope.parent;
|
|
}
|
|
}
|
|
});
|
|
|
|
checked.add(fn_declaration);
|
|
walking.delete(fn_declaration);
|
|
|
|
return hoistable;
|
|
};
|
|
|
|
for (const [name, node] of top_level_function_declarations) {
|
|
if (is_hoistable(node)) {
|
|
const variable = this.var_lookup.get(name);
|
|
variable.hoistable = true;
|
|
hoistable_nodes.add(node);
|
|
|
|
const i = body.indexOf(node);
|
|
body.splice(i, 1);
|
|
this.fully_hoisted.push(node);
|
|
}
|
|
}
|
|
|
|
for (const { specifiers } of imports) {
|
|
for (const specifier of specifiers) {
|
|
const variable = var_lookup.get(specifier.local.name);
|
|
|
|
if (!variable.mutated || variable.subscribable) {
|
|
variable.hoistable = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
extract_reactive_declarations() {
|
|
const component = this;
|
|
|
|
const unsorted_reactive_declarations: Array<{
|
|
assignees: Set<string>;
|
|
dependencies: Set<string>;
|
|
node: Node;
|
|
declaration: Node;
|
|
}> = [];
|
|
|
|
this.ast.instance.content.body.forEach(node => {
|
|
const ignores = extract_svelte_ignore_from_comments(node);
|
|
if (ignores.length) this.push_ignores(ignores);
|
|
|
|
if (node.type === 'LabeledStatement' && node.label.name === '$') {
|
|
this.reactive_declaration_nodes.add(node);
|
|
|
|
const assignees = new Set<string>();
|
|
const assignee_nodes = new Set();
|
|
const dependencies = new Set<string>();
|
|
const module_dependencies = new Set<string>();
|
|
|
|
let scope = this.instance_scope;
|
|
const map = this.instance_scope_map;
|
|
|
|
walk(node.body, {
|
|
enter(node: Node, parent) {
|
|
if (map.has(node)) {
|
|
scope = map.get(node);
|
|
}
|
|
|
|
if (node.type === 'AssignmentExpression') {
|
|
const left = get_object(node.left);
|
|
|
|
extract_identifiers(left).forEach(node => {
|
|
assignee_nodes.add(node);
|
|
assignees.add(node.name);
|
|
});
|
|
|
|
if (node.operator !== '=') {
|
|
dependencies.add(left.name);
|
|
}
|
|
} else if (node.type === 'UpdateExpression') {
|
|
const identifier = get_object(node.argument);
|
|
assignees.add(identifier.name);
|
|
} else if (is_reference(node as NodeWithPropertyDefinition, parent as NodeWithPropertyDefinition)) {
|
|
const identifier = get_object(node);
|
|
if (!assignee_nodes.has(identifier)) {
|
|
const { name } = identifier;
|
|
const owner = scope.find_owner(name);
|
|
const variable = component.var_lookup.get(name);
|
|
let should_add_as_dependency = true;
|
|
|
|
if (variable) {
|
|
variable.is_reactive_dependency = true;
|
|
if (variable.module && variable.writable) {
|
|
should_add_as_dependency = false;
|
|
module_dependencies.add(name);
|
|
}
|
|
}
|
|
|
|
if (
|
|
should_add_as_dependency &&
|
|
(!owner || owner === component.instance_scope) &&
|
|
(name[0] === '$' || variable)
|
|
) {
|
|
dependencies.add(name);
|
|
}
|
|
}
|
|
|
|
this.skip();
|
|
}
|
|
},
|
|
|
|
leave(node: Node) {
|
|
if (map.has(node)) {
|
|
scope = scope.parent;
|
|
}
|
|
}
|
|
});
|
|
|
|
if (module_dependencies.size > 0 && dependencies.size === 0) {
|
|
component.warn(node.body as any, compiler_warnings.module_script_variable_reactive_declaration(Array.from(module_dependencies)));
|
|
}
|
|
|
|
const { expression } = node.body as ExpressionStatement;
|
|
const declaration = expression && (expression as AssignmentExpression).left;
|
|
|
|
const is_dependency_static = Array.from(dependencies).every(
|
|
dependency => dependency !== '$$props' && dependency !== '$$restProps' && !is_dynamic(this.var_lookup.get(dependency))
|
|
);
|
|
|
|
if (is_dependency_static) {
|
|
assignees.forEach(assignee => {
|
|
const variable = component.var_lookup.get(assignee);
|
|
if (variable) {
|
|
variable.is_reactive_static = true;
|
|
}
|
|
});
|
|
}
|
|
|
|
unsorted_reactive_declarations.push({
|
|
assignees,
|
|
dependencies,
|
|
node,
|
|
declaration
|
|
});
|
|
}
|
|
|
|
if (ignores.length) this.pop_ignores();
|
|
});
|
|
|
|
const lookup = new Map();
|
|
|
|
unsorted_reactive_declarations.forEach(declaration => {
|
|
declaration.assignees.forEach(name => {
|
|
if (!lookup.has(name)) {
|
|
lookup.set(name, []);
|
|
}
|
|
|
|
// TODO warn or error if a name is assigned to in
|
|
// multiple reactive declarations?
|
|
lookup.get(name).push(declaration);
|
|
});
|
|
});
|
|
|
|
const cycle = check_graph_for_cycles(unsorted_reactive_declarations.reduce((acc, declaration) => {
|
|
declaration.assignees.forEach(v => {
|
|
declaration.dependencies.forEach(w => {
|
|
if (!declaration.assignees.has(w)) {
|
|
acc.push([v, w]);
|
|
}
|
|
});
|
|
});
|
|
return acc;
|
|
}, []));
|
|
|
|
if (cycle && cycle.length) {
|
|
const declarationList = lookup.get(cycle[0]);
|
|
const declaration = declarationList[0];
|
|
return this.error(declaration.node, compiler_errors.cyclical_reactive_declaration(cycle));
|
|
}
|
|
|
|
const add_declaration = declaration => {
|
|
if (this.reactive_declarations.includes(declaration)) return;
|
|
|
|
declaration.dependencies.forEach(name => {
|
|
if (declaration.assignees.has(name)) return;
|
|
const earlier_declarations = lookup.get(name);
|
|
if (earlier_declarations) {
|
|
earlier_declarations.forEach(add_declaration);
|
|
}
|
|
});
|
|
|
|
this.reactive_declarations.push(declaration);
|
|
};
|
|
|
|
unsorted_reactive_declarations.forEach(add_declaration);
|
|
}
|
|
|
|
warn_if_undefined(name: string, node, template_scope: TemplateScope) {
|
|
if (name[0] === '$') {
|
|
if (name === '$' || name[1] === '$' && !is_reserved_keyword(name)) {
|
|
return this.error(node, compiler_errors.illegal_global(name));
|
|
}
|
|
|
|
this.has_reactive_assignments = true; // TODO does this belong here?
|
|
|
|
if (is_reserved_keyword(name)) return;
|
|
|
|
name = name.slice(1);
|
|
}
|
|
|
|
if (this.var_lookup.has(name) && !this.var_lookup.get(name).global) return;
|
|
if (template_scope && template_scope.names.has(name)) return;
|
|
if (globals.has(name) && node.type !== 'InlineComponent') return;
|
|
|
|
this.warn(node, compiler_warnings.missing_declaration(name, !!this.ast.instance));
|
|
}
|
|
|
|
push_ignores(ignores) {
|
|
this.ignores = new Set(this.ignores || []);
|
|
add_to_set(this.ignores, ignores);
|
|
this.ignore_stack.push(this.ignores);
|
|
}
|
|
|
|
pop_ignores() {
|
|
this.ignore_stack.pop();
|
|
this.ignores = this.ignore_stack[this.ignore_stack.length - 1];
|
|
}
|
|
}
|
|
|
|
const regex_valid_tag_name = /^[a-zA-Z][a-zA-Z0-9]*-[a-zA-Z0-9-]+$/;
|
|
|
|
function process_component_options(component: Component, nodes) {
|
|
const component_options: ComponentOptions = {
|
|
immutable: component.compile_options.immutable || false,
|
|
accessors:
|
|
'accessors' in component.compile_options
|
|
? component.compile_options.accessors
|
|
: !!component.compile_options.customElement,
|
|
preserveWhitespace: !!component.compile_options.preserveWhitespace,
|
|
namespace: component.compile_options.namespace
|
|
};
|
|
|
|
const node = nodes.find(node => node.name === 'svelte:options');
|
|
|
|
function get_value(attribute, { code, message }) {
|
|
const { value } = attribute;
|
|
const chunk = value[0];
|
|
|
|
if (!chunk) return true;
|
|
|
|
if (value.length > 1) {
|
|
return component.error(attribute, { code, message });
|
|
}
|
|
|
|
if (chunk.type === 'Text') return chunk.data;
|
|
|
|
if (chunk.expression.type !== 'Literal') {
|
|
return component.error(attribute, { code, message });
|
|
}
|
|
|
|
return chunk.expression.value;
|
|
}
|
|
|
|
if (node) {
|
|
node.attributes.forEach(attribute => {
|
|
if (attribute.type === 'Attribute') {
|
|
const { name } = attribute;
|
|
|
|
switch (name) {
|
|
case 'tag': {
|
|
const tag = get_value(attribute, compiler_errors.invalid_tag_attribute);
|
|
|
|
if (typeof tag !== 'string' && tag !== null) {
|
|
return component.error(attribute, compiler_errors.invalid_tag_attribute);
|
|
}
|
|
|
|
if (tag && !regex_valid_tag_name.test(tag)) {
|
|
return component.error(attribute, compiler_errors.invalid_tag_property);
|
|
}
|
|
|
|
if (tag && !component.compile_options.customElement) {
|
|
component.warn(attribute, compiler_warnings.missing_custom_element_compile_options);
|
|
}
|
|
|
|
component_options.tag = tag;
|
|
break;
|
|
}
|
|
|
|
case 'namespace': {
|
|
const ns = get_value(attribute, compiler_errors.invalid_namespace_attribute);
|
|
|
|
if (typeof ns !== 'string') {
|
|
return component.error(attribute, compiler_errors.invalid_namespace_attribute);
|
|
}
|
|
|
|
if (valid_namespaces.indexOf(ns) === -1) {
|
|
const match = fuzzymatch(ns, valid_namespaces);
|
|
return component.error(attribute, compiler_errors.invalid_namespace_property(ns, match));
|
|
}
|
|
|
|
component_options.namespace = ns;
|
|
break;
|
|
}
|
|
|
|
case 'accessors':
|
|
case 'immutable':
|
|
case 'preserveWhitespace': {
|
|
const value = get_value(attribute, compiler_errors.invalid_attribute_value(name));
|
|
|
|
if (typeof value !== 'boolean') {
|
|
return component.error(attribute, compiler_errors.invalid_attribute_value(name));
|
|
}
|
|
|
|
component_options[name] = value;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return component.error(attribute, compiler_errors.invalid_options_attribute_unknown);
|
|
}
|
|
} else {
|
|
return component.error(attribute, compiler_errors.invalid_options_attribute);
|
|
}
|
|
});
|
|
}
|
|
|
|
return component_options;
|
|
}
|
|
|
|
function get_relative_path(from: string, to: string) {
|
|
const from_parts = from.split(/[/\\]/);
|
|
const to_parts = to.split(/[/\\]/);
|
|
|
|
from_parts.pop(); // get dirname
|
|
|
|
while (from_parts[0] === to_parts[0]) {
|
|
from_parts.shift();
|
|
to_parts.shift();
|
|
}
|
|
|
|
if (from_parts.length) {
|
|
let i = from_parts.length;
|
|
while (i--) from_parts[i] = '..';
|
|
}
|
|
|
|
return from_parts.concat(to_parts).join('/');
|
|
}
|
|
|
|
function get_basename(filename: string) {
|
|
return filename.split(/[/\\]/).pop();
|
|
}
|
|
|
|
function get_sourcemap_source_filename(compile_options: CompileOptions) {
|
|
if (!compile_options.filename) return null;
|
|
|
|
return compile_options.outputFilename
|
|
? get_relative_path(compile_options.outputFilename, compile_options.filename)
|
|
: get_basename(compile_options.filename);
|
|
}
|