cli-node: move back entry point helper
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
This commit is contained in:
@@ -1,77 +0,0 @@
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/*
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* Copyright 2023 The Backstage Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { extname } from 'path';
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import { BackstagePackageJson } from './PackageGraph';
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export interface EntryPoint {
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mount: string;
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path: string;
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name: string;
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ext: string;
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}
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// Unless explicitly specified in exports, the index entrypoint is always
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// assumed to be at src/index.ts for backwards compatibility.
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const defaultIndex = {
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mount: '.',
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path: 'src/index.ts',
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name: 'index',
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ext: '.ts',
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};
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function parseEntryPoint(mount: string, path: string): EntryPoint {
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let name = mount;
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if (name === '.') {
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name = 'index';
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} else if (name.startsWith('./')) {
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name = name.slice(2);
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}
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if (name.includes('/')) {
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throw new Error(`Mount point '${mount}' may not contain multiple slashes`);
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}
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return { mount, path, name, ext: extname(path) };
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}
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export function readEntryPoints(pkg: BackstagePackageJson): Array<EntryPoint> {
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const exp = pkg.exports;
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if (typeof exp === 'string') {
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return [defaultIndex];
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} else if (exp && typeof exp === 'object' && !Array.isArray(exp)) {
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const entryPoints = new Array<{
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mount: string;
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path: string;
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name: string;
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ext: string;
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}>();
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for (const mount of Object.keys(exp)) {
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const path = exp[mount];
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if (typeof path !== 'string') {
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throw new Error(
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`Exports field value must be a string, got '${JSON.stringify(path)}'`,
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);
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}
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entryPoints.push(parseEntryPoint(mount, path));
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}
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return entryPoints;
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}
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return [defaultIndex];
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}
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