164 lines
		
	
	
		
			4.5 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			164 lines
		
	
	
		
			4.5 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
"use strict";
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Object.defineProperty(exports, "__esModule", {
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  value: true
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});
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exports.default = parseAndBuildMetadata;
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var _t = require("@babel/types");
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var _parser = require("@babel/parser");
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var _codeFrame = require("@babel/code-frame");
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const {
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  isCallExpression,
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  isExpressionStatement,
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  isFunction,
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  isIdentifier,
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  isJSXIdentifier,
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  isNewExpression,
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  isPlaceholder,
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  isStatement,
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  isStringLiteral,
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  removePropertiesDeep,
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  traverse
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} = _t;
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const PATTERN = /^[_$A-Z0-9]+$/;
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function parseAndBuildMetadata(formatter, code, opts) {
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  const {
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    placeholderWhitelist,
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    placeholderPattern,
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    preserveComments,
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    syntacticPlaceholders
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  } = opts;
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  const ast = parseWithCodeFrame(code, opts.parser, syntacticPlaceholders);
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  removePropertiesDeep(ast, {
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    preserveComments
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  });
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  formatter.validate(ast);
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  const state = {
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    syntactic: {
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      placeholders: [],
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      placeholderNames: new Set()
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    },
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    legacy: {
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      placeholders: [],
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      placeholderNames: new Set()
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    },
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    placeholderWhitelist,
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    placeholderPattern,
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    syntacticPlaceholders
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  };
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  traverse(ast, placeholderVisitorHandler, state);
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  return Object.assign({
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    ast
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  }, state.syntactic.placeholders.length ? state.syntactic : state.legacy);
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}
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function placeholderVisitorHandler(node, ancestors, state) {
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  var _state$placeholderWhi;
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  let name;
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  let hasSyntacticPlaceholders = state.syntactic.placeholders.length > 0;
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  if (isPlaceholder(node)) {
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    if (state.syntacticPlaceholders === false) {
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      throw new Error("%%foo%%-style placeholders can't be used when " + "'.syntacticPlaceholders' is false.");
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    }
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    name = node.name.name;
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    hasSyntacticPlaceholders = true;
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  } else if (hasSyntacticPlaceholders || state.syntacticPlaceholders) {
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    return;
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  } else if (isIdentifier(node) || isJSXIdentifier(node)) {
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    name = node.name;
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  } else if (isStringLiteral(node)) {
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    name = node.value;
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  } else {
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    return;
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  }
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  if (hasSyntacticPlaceholders && (state.placeholderPattern != null || state.placeholderWhitelist != null)) {
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    throw new Error("'.placeholderWhitelist' and '.placeholderPattern' aren't compatible" + " with '.syntacticPlaceholders: true'");
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  }
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  if (!hasSyntacticPlaceholders && (state.placeholderPattern === false || !(state.placeholderPattern || PATTERN).test(name)) && !((_state$placeholderWhi = state.placeholderWhitelist) != null && _state$placeholderWhi.has(name))) {
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    return;
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  }
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  ancestors = ancestors.slice();
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  const {
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    node: parent,
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    key
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  } = ancestors[ancestors.length - 1];
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  let type;
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  if (isStringLiteral(node) || isPlaceholder(node, {
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    expectedNode: "StringLiteral"
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  })) {
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    type = "string";
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  } else if (isNewExpression(parent) && key === "arguments" || isCallExpression(parent) && key === "arguments" || isFunction(parent) && key === "params") {
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    type = "param";
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  } else if (isExpressionStatement(parent) && !isPlaceholder(node)) {
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    type = "statement";
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    ancestors = ancestors.slice(0, -1);
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  } else if (isStatement(node) && isPlaceholder(node)) {
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    type = "statement";
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  } else {
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    type = "other";
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  }
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  const {
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    placeholders,
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    placeholderNames
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  } = !hasSyntacticPlaceholders ? state.legacy : state.syntactic;
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  placeholders.push({
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    name,
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    type,
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    resolve: ast => resolveAncestors(ast, ancestors),
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    isDuplicate: placeholderNames.has(name)
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  });
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  placeholderNames.add(name);
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}
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function resolveAncestors(ast, ancestors) {
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  let parent = ast;
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  for (let i = 0; i < ancestors.length - 1; i++) {
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    const {
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      key,
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      index
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    } = ancestors[i];
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    if (index === undefined) {
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      parent = parent[key];
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    } else {
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      parent = parent[key][index];
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    }
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  }
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  const {
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    key,
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    index
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  } = ancestors[ancestors.length - 1];
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  return {
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    parent,
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    key,
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    index
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  };
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}
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function parseWithCodeFrame(code, parserOpts, syntacticPlaceholders) {
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  const plugins = (parserOpts.plugins || []).slice();
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  if (syntacticPlaceholders !== false) {
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    plugins.push("placeholders");
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  }
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  parserOpts = Object.assign({
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    allowAwaitOutsideFunction: true,
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    allowReturnOutsideFunction: true,
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    allowNewTargetOutsideFunction: true,
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    allowSuperOutsideMethod: true,
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    allowYieldOutsideFunction: true,
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    sourceType: "module"
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  }, parserOpts, {
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    plugins
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  });
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  try {
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    return (0, _parser.parse)(code, parserOpts);
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  } catch (err) {
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    const loc = err.loc;
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    if (loc) {
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      err.message += "\n" + (0, _codeFrame.codeFrameColumns)(code, {
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        start: loc
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      });
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      err.code = "BABEL_TEMPLATE_PARSE_ERROR";
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    }
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    throw err;
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  }
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}
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//# sourceMappingURL=parse.js.map
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