polymer-build
Version:
A library of Gulp build tasks
77 lines • 3.32 kB
JavaScript
;
/**
* @license
* Copyright (c) 2018 The Polymer Project Authors. All rights reserved.
* This code may only be used under the BSD style license found at
* http://polymer.github.io/LICENSE.txt
* The complete set of authors may be found at
* http://polymer.github.io/AUTHORS.txt
* The complete set of contributors may be found at
* http://polymer.github.io/CONTRIBUTORS.txt
* Code distributed by Google as part of the polymer project is also
* subject to an additional IP rights grant found at
* http://polymer.github.io/PATENTS.txt
*/
Object.defineProperty(exports, "__esModule", { value: true });
const plugin_syntax_dynamic_import_1 = require("@babel/plugin-syntax-dynamic-import");
const resolve_specifier_node_1 = require("polymer-analyzer/lib/javascript/resolve-specifier-node");
const isPathSpecifier = (s) => /^\.{0,2}\//.test(s);
/**
* Rewrites so-called "bare module specifiers" to be web-compatible paths.
*/
exports.resolveBareSpecifiers = (filePath, isComponentRequest, packageName, componentDir, rootDir) => ({
inherits: plugin_syntax_dynamic_import_1.default,
visitor: {
Program(path) {
path.traverse({
CallExpression(path) {
if (path.node.callee.type === 'Import') {
const specifierArg = path.node.arguments[0];
if (specifierArg.type !== 'StringLiteral') {
// Should never happen
return;
}
const specifier = specifierArg.value;
specifierArg.value = maybeResolve(specifier, filePath, isComponentRequest, packageName, componentDir, rootDir);
}
}
});
},
'ImportDeclaration|ExportNamedDeclaration|ExportAllDeclaration'(path) {
const node = path.node;
// An export without a 'from' clause
if (node.source == null) {
return;
}
const specifier = node.source.value;
node.source.value = maybeResolve(specifier, filePath, isComponentRequest, packageName, componentDir, rootDir);
}
}
});
const maybeResolve = (specifier, filePath, isComponentRequest, packageName, componentDir, rootDir) => {
try {
let componentInfo;
if (isComponentRequest) {
componentInfo = {
packageName: packageName,
componentDir: componentDir,
rootDir: rootDir,
};
}
return resolve_specifier_node_1.resolve(specifier, filePath, componentInfo);
}
catch (e) {
// `require` and `meta` are fake imports that our other build tooling
// injects, so we should not warn for them.
if (!isPathSpecifier(specifier) && specifier !== 'require' &&
specifier !== 'meta') {
// Don't warn if the specifier was already a path, even though we do
// resolve paths, because maybe the user is serving it some other
// way.
console.warn(`Could not resolve module specifier "${specifier}" ` +
`in file "${filePath}".`);
}
return specifier;
}
};
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