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rOACCT/node_modules/webpack/lib/dependencies/ContextDependencyHelpers.js
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ContextDependencyHelpers.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { parseResource } = require("../util/identifier");
/** @typedef {import("estree").Node} EsTreeNode */
/** @typedef {import("../../declarations/WebpackOptions").ModuleOptions} ModuleOptions */
/** @typedef {import("../javascript/BasicEvaluatedExpression")} BasicEvaluatedExpression */
/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
/** @typedef {import("./ContextDependency")} ContextDependency */
/** @typedef {import("./ContextDependency").ContextDependencyOptions} ContextDependencyOptions */
/**
* Escapes regular expression metacharacters
* @param {string} str String to quote
* @returns {string} Escaped string
*/
const quoteMeta = str => {
return str.replace(/[-[\]\\/{}()*+?.^$|]/g, "\\$&");
};
const splitContextFromPrefix = prefix => {
const idx = prefix.lastIndexOf("/");
let context = ".";
if (idx >= 0) {
context = prefix.substr(0, idx);
prefix = `.${prefix.substr(idx)}`;
}
return {
context,
prefix
};
};
/** @typedef {Partial<Omit<ContextDependencyOptions, "resource"|"recursive"|"regExp">>} PartialContextDependencyOptions */
/** @typedef {{ new(options: ContextDependencyOptions, range: [number, number], valueRange: [number, number]): ContextDependency }} ContextDependencyConstructor */
/**
* @param {ContextDependencyConstructor} Dep the Dependency class
* @param {[number, number]} range source range
* @param {BasicEvaluatedExpression} param context param
* @param {EsTreeNode} expr expr
* @param {ModuleOptions} options options for context creation
* @param {PartialContextDependencyOptions} contextOptions options for the ContextModule
* @param {JavascriptParser} parser the parser
* @returns {ContextDependency} the created Dependency
*/
exports.create = (Dep, range, param, expr, options, contextOptions, parser) => {
if (param.isTemplateString()) {
let prefixRaw = param.quasis[0].string;
let postfixRaw =
param.quasis.length > 1
? param.quasis[param.quasis.length - 1].string
: "";
const valueRange = param.range;
const { context, prefix } = splitContextFromPrefix(prefixRaw);
const { path: postfix, query, fragment } = parseResource(
postfixRaw,
parser
);
// When there are more than two quasis, the generated RegExp can be more precise
// We join the quasis with the expression regexp
const innerQuasis = param.quasis.slice(1, param.quasis.length - 1);
const innerRegExp =
options.wrappedContextRegExp.source +
innerQuasis
.map(q => quoteMeta(q.string) + options.wrappedContextRegExp.source)
.join("");
// Example: `./context/pre${e}inner${e}inner2${e}post?query#frag`
// context: "./context"
// prefix: "./pre"
// innerQuasis: [BEE("inner"), BEE("inner2")]
// (BEE = BasicEvaluatedExpression)
// postfix: "post"
// query: "?query"
// fragment: "#frag"
// regExp: /^\.\/pre.*inner.*inner2.*post$/
const regExp = new RegExp(
`^${quoteMeta(prefix)}${innerRegExp}${quoteMeta(postfix)}$`
);
const dep = new Dep(
{
request: context + query + fragment,
recursive: options.wrappedContextRecursive,
regExp,
mode: "sync",
...contextOptions
},
range,
valueRange
);
dep.loc = expr.loc;
const replaces = [];
param.parts.forEach((part, i) => {
if (i % 2 === 0) {
// Quasis or merged quasi
let range = part.range;
let value = part.string;
if (param.templateStringKind === "cooked") {
value = JSON.stringify(value);
value = value.slice(1, value.length - 1);
}
if (i === 0) {
// prefix
value = prefix;
range = [param.range[0], part.range[1]];
value =
(param.templateStringKind === "cooked" ? "`" : "String.raw`") +
value;
} else if (i === param.parts.length - 1) {
// postfix
value = postfix;
range = [part.range[0], param.range[1]];
value = value + "`";
} else if (
part.expression &&
part.expression.type === "TemplateElement" &&
part.expression.value.raw === value
) {
// Shortcut when it's a single quasi and doesn't need to be replaced
return;
}
replaces.push({
range,
value
});
} else {
// Expression
parser.walkExpression(part.expression);
}
});
dep.replaces = replaces;
dep.critical =
options.wrappedContextCritical &&
"a part of the request of a dependency is an expression";
return dep;
} else if (
param.isWrapped() &&
((param.prefix && param.prefix.isString()) ||
(param.postfix && param.postfix.isString()))
) {
let prefixRaw =
param.prefix && param.prefix.isString() ? param.prefix.string : "";
let postfixRaw =
param.postfix && param.postfix.isString() ? param.postfix.string : "";
const prefixRange =
param.prefix && param.prefix.isString() ? param.prefix.range : null;
const postfixRange =
param.postfix && param.postfix.isString() ? param.postfix.range : null;
const valueRange = param.range;
const { context, prefix } = splitContextFromPrefix(prefixRaw);
const { path: postfix, query, fragment } = parseResource(
postfixRaw,
parser
);
const regExp = new RegExp(
`^${quoteMeta(prefix)}${options.wrappedContextRegExp.source}${quoteMeta(
postfix
)}$`
);
const dep = new Dep(
{
request: context + query + fragment,
recursive: options.wrappedContextRecursive,
regExp,
mode: "sync",
...contextOptions
},
range,
valueRange
);
dep.loc = expr.loc;
const replaces = [];
if (prefixRange) {
replaces.push({
range: prefixRange,
value: JSON.stringify(prefix)
});
}
if (postfixRange) {
replaces.push({
range: postfixRange,
value: JSON.stringify(postfix)
});
}
dep.replaces = replaces;
dep.critical =
options.wrappedContextCritical &&
"a part of the request of a dependency is an expression";
if (parser && param.wrappedInnerExpressions) {
for (const part of param.wrappedInnerExpressions) {
if (part.expression) parser.walkExpression(part.expression);
}
}
return dep;
} else {
const dep = new Dep(
{
request: options.exprContextRequest,
recursive: options.exprContextRecursive,
regExp: /** @type {RegExp} */ (options.exprContextRegExp),
mode: "sync",
...contextOptions
},
range,
param.range
);
dep.loc = expr.loc;
dep.critical =
options.exprContextCritical &&
"the request of a dependency is an expression";
parser.walkExpression(param.expression);
return dep;
}
};
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