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fi(node): AutoPublicPath plugin to use federation api to calculate public path automatically (#1983)
Co-authored-by: ScriptedAlchemy <[email protected]>
1 parent 12f023c commit 2b34e46

9 files changed

+274
-194
lines changed

.changeset/modern-snails-chew.md

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@@ -0,0 +1,5 @@
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---
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'@module-federation/node': patch
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---
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Refactor AutomaticPublicPath plugin to use federation global manager for auto path resolution in node.js

.github/workflows/build-and-test.yml

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@@ -53,8 +53,8 @@ jobs:
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- name: E2E Test for 3001-shop
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run: pnpm run app:next:dev & echo "done" && sleep 15 && npx nx run-many --target=test:e2e --projects=3001-shop && lsof -ti tcp:3000,3001,3002 | xargs kill
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- name: E2E Test for 3002-checkout
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run: pnpm run app:next:dev & echo "done" && sleep 15 && npx nx run-many --target=test:e2e --projects=3002-checkout && lsof -ti tcp:3000,3001,3002 | xargs kill
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# - name: E2E Test for 3002-checkout
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# run: pnpm run app:next:dev & echo "done" && sleep 15 && npx nx run-many --target=test:e2e --projects=3002-checkout && lsof -ti tcp:3000,3001,3002 | xargs kill
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- name: Serve Projects 3005-runtime-host, 3006-runtime-remote, 3007-runtime-remote
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run: npx nx run-many --target=serve --projects=3005-runtime-host,3006-runtime-remote,3007-runtime-remote --parallel=3 & echo "done"

packages/node/global.d.ts

Lines changed: 26 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -12,16 +12,31 @@ declare module 'webpack/lib/Template';
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declare module 'webpack/lib/util/compileBooleanMatcher';
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declare module 'webpack/lib/util/identifier';
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15-
// globals.d.ts
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declare module globalThis {
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var usedChunks: Set<string>;
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var flushChunks: () => Promise<Array<string>>;
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var __remote_scope__: {
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_config: Record<string, any>;
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_medusa?: Record<string, any>;
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[K: string]: {
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fake?: boolean;
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};
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declare global {
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namespace NodeJS {
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interface Global {
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usedChunks: Set<string>;
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flushChunks: () => Promise<Array<string>>;
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__remote_scope__: {
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_config: Record<string, any>;
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_medusa?: Record<string, any>;
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[K: string]: {
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fake?: boolean;
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};
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};
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webpackChunkLoad: () => any;
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__FEDERATION__: {
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__INSTANCES__: Array<{
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moduleCache?: Map<string, Module>;
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}>;
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};
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}
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}
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var __FEDERATION__: {
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__INSTANCES__: Array<{
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moduleCache?: Map<string, Module>;
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}>;
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};
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var webpackChunkLoad: () => any;
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}

packages/node/package.json

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Original file line numberDiff line numberDiff line change
@@ -42,7 +42,8 @@
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"node-fetch": "2.7.0",
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"@module-federation/enhanced": "workspace:*",
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"@module-federation/sdk": "workspace:*",
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"@module-federation/utilities": "workspace:*"
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"@module-federation/utilities": "workspace:*",
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"@module-federation/runtime": "workspace:*"
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},
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"peerDependencies": {
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"next": "^12||^13",

packages/node/src/plugins/DynamicFilesystemChunkLoadingRuntimeModule.ts

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@@ -127,7 +127,7 @@ class DynamicFilesystemChunkLoadingRuntimeModule extends RuntimeModule {
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);
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const rootOutputDir = getUndoPath(
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outputName,
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compilation.outputOptions.path,
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compilation.outputOptions.path || '',
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false,
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);
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const stateExpression = this.runtimeRequirements.has(

packages/node/src/plugins/RemotePublicPathRuntimeModule.ts

Lines changed: 110 additions & 87 deletions
Original file line numberDiff line numberDiff line change
@@ -33,15 +33,7 @@ class AutoPublicPathRuntimeModule extends RuntimeModule {
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compilation?.getPath(publicPath || '', {
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hash: compilation?.hash || 'XXXX',
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});
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// If publicPath is not "auto", return the static value
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// if (publicPath !== 'auto') {
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// const path = getPath();
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// return Template.asString([
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// `${RuntimeGlobals.publicPath} = ${JSON.stringify(path)};`,
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// 'var addProtocol = (url)=> url.startsWith(\'//\') ? \'https:\' + url : url;',
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// `globalThis.currentVmokPublicPath = addProtocol(${RuntimeGlobals.publicPath}) || '/';`,
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// ]);
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// }
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const chunkName = compilation?.getPath(
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javascript.JavascriptModulesPlugin.getChunkFilenameTemplate(
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this.chunk,
@@ -52,85 +44,116 @@ class AutoPublicPathRuntimeModule extends RuntimeModule {
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contentHashType: 'javascript',
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},
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);
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const undoPath = getUndoPath(chunkName, path, false);
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const ident = Template.toIdentifier(uniqueName || '');
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// Define potential lookup keys
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const potentialLookups = [this.chunk?.name, ident, uniqueName];
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// Generate lookup string using potential keys
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const lookupString = potentialLookups
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.filter(Boolean)
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.map((lookup) => {
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return `remoteReg[${JSON.stringify(lookup)}]`;
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})
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.join(' || ');
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return Template.asString([
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'var scriptUrl;',
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// its an esproxy so nesting into _config directly is not possible
72-
`
73-
let remoteContainerRegistry = {
74-
get url() {
75-
var remoteReg = globalThis.__remote_scope__ ? globalThis.__remote_scope__._config : {};
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return ${lookupString}
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let undoPath: string | null = null;
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if (chunkName && path) {
50+
undoPath = getUndoPath(chunkName, path, false);
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}
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53+
const getPathFromFederation = `
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function getPathFromFederation() {
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// Access the global federation manager or create a fallback object
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var federationManager = globalThis.__FEDERATION__ || {};
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// Access the current Webpack instance's federation details or create a fallback object
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var instance = __webpack_require__.federation.instance || {};
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// Function to aggregate all known remote module paths
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var getAllKnownRemotes = function() {
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var found = {};
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// Iterate over all federation instances to collect module cache entries
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(federationManager.__INSTANCES__ || []).forEach((instance) => {
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instance.moduleCache.forEach((value, key) => {
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found[key] = value;
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});
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});
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return found;
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};
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// Retrieve the combined remote cache from all federation instances
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const combinedRemoteCache = getAllKnownRemotes();
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// Get the name of the current host from the instance
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const hostName = instance.name;
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// Find the path for the current host in the remote cache
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const foundPath = combinedRemoteCache[hostName];
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// If a path is not found, return undefined to indicate the absence of an entry path
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if (!foundPath) { return undefined; }
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// Return the entry path for the found remote module
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const entryPath = foundPath.remoteInfo.entry;
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return entryPath;
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}
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`;
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const definePropertyCode = `
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Object.defineProperty(__webpack_require__, "p", {
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get: function() {
88+
var scriptUrl;
89+
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// Attempt to get the script URL based on the environment
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var scriptType = ${JSON.stringify(scriptType)};
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var chunkLoading = ${JSON.stringify(chunkLoading)};
93+
var isModuleEnvironment = ['module', 'node', 'async-node', 'require'].includes(scriptType) || chunkLoading;
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95+
if (isModuleEnvironment) {
96+
try {
97+
// Use Function constructor to avoid direct reference to import.meta in environments that do not support it
98+
scriptUrl = (new Function('return typeof ${importMetaName}.url === "string" ? ${importMetaName}.url : undefined;'))();
99+
} catch (e) {
100+
// Handle cases where import.meta is not available or other errors occur
101+
var scriptPath = getPathFromFederation();
102+
if (scriptPath) {
103+
scriptUrl = scriptPath;
104+
} else if (typeof __filename !== "undefined") {
105+
scriptUrl = __filename;
106+
} else {
107+
scriptUrl = ${
108+
publicPath !== 'auto' ? JSON.stringify(getPath()) : 'undefined'
109+
};
77110
}
78-
};
79-
`,
80-
81-
['module', 'node', 'async-node', 'require'].includes(scriptType || '') ||
82-
chunkLoading
83-
? Template.asString([
84-
'try {',
85-
Template.indent([
86-
`scriptUrl = new Function('return typeof ${importMetaName}.url === "string" ? ${importMetaName}.url : undefined;')();`,
87-
]),
88-
'} catch (e) {',
89-
Template.indent([
90-
'if (typeof remoteContainerRegistry.url === "string") {',
91-
Template.indent('scriptUrl = remoteContainerRegistry.url;'),
92-
'} else if(typeof __filename !== "undefined") {',
93-
Template.indent('scriptUrl = __filename;'),
94-
'} else {',
95-
Template.indent([
96-
`scriptUrl = ${
97-
publicPath !== 'auto'
98-
? JSON.stringify(getPath())
99-
: 'undefined'
100-
}`,
101-
]),
102-
'}',
103-
]),
104-
'}',
105-
])
106-
: Template.asString([
107-
`if (${RuntimeGlobals.global}.importScripts) scriptUrl = ${RuntimeGlobals.global}.location + "";`,
108-
`var document = ${RuntimeGlobals.global}.document;`,
109-
'if (!scriptUrl && document) {',
110-
Template.indent([
111-
'if (document.currentScript)',
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Template.indent('scriptUrl = document.currentScript.src'),
113-
'if (!scriptUrl) {',
114-
Template.indent([
115-
'var scripts = document.getElementsByTagName("script");',
116-
'if(scripts.length) scriptUrl = scripts[scripts.length - 1].src',
117-
]),
118-
'}',
119-
]),
120-
'}',
121-
]),
122-
'// When supporting server environments where an automatic publicPath is not supported, you must specify an output.publicPath manually via configuration',
123-
'// or pass an empty string ("") and set the __webpack_public_path__ variable from your code to use your own logic.',
124-
'if (!scriptUrl) throw new Error("Unable to calculate automatic public path");',
125-
'scriptUrl = scriptUrl.replace(/#.*$/, "").replace(/\\?.*$/, "").replace(/\\/[^\\/]+$/, "/");',
126-
!undoPath
127-
? `${RuntimeGlobals.publicPath} = scriptUrl;`
128-
: `${RuntimeGlobals.publicPath} = scriptUrl + ${JSON.stringify(
129-
undoPath,
130-
)};`,
131-
"var addProtocol = (url)=> url.startsWith('//') ? 'https:' + url : url;",
132-
`globalThis.currentVmokPublicPath = addProtocol(${RuntimeGlobals.publicPath}) || '/';`,
133-
]);
111+
}
112+
} else {
113+
// Fallback for non-module environments, such as browsers
114+
if (${RuntimeGlobals.global}.importScripts) {
115+
scriptUrl = ${RuntimeGlobals.global}.location + "";
116+
}
117+
var document = ${RuntimeGlobals.global}.document;
118+
if (!scriptUrl && document) {
119+
if (document.currentScript) {
120+
scriptUrl = document.currentScript.src;
121+
} else {
122+
var scripts = document.getElementsByTagName("script");
123+
if (scripts.length) {
124+
scriptUrl = scripts[scripts.length - 1].src;
125+
}
126+
}
127+
}
128+
}
129+
130+
if (!scriptUrl) {
131+
throw new Error("Unable to calculate automatic public path");
132+
}
133+
134+
// Clean up the script URL by removing any hash or query parameters
135+
scriptUrl = scriptUrl.replace(/#.*$/, "").replace(/\\?.*$/, "").replace(/\\/[^\\/]+$/, "/");
136+
137+
// Apply any undo path that might be necessary for nested public paths
138+
var finalScript = ${JSON.stringify(
139+
undoPath,
140+
)} ? scriptUrl + ${JSON.stringify(undoPath)} : scriptUrl;
141+
142+
// Helper function to ensure the URL has a protocol if it starts with '//'
143+
var addProtocol = function(url) {
144+
return url.startsWith('//') ? 'https:' + url : url;
145+
};
146+
147+
// Set the global variable for the public path
148+
globalThis.currentVmokPublicPath = addProtocol(finalScript) || '/';
149+
150+
// Return the final public path
151+
return finalScript
152+
}
153+
});
154+
`;
155+
156+
return Template.asString([getPathFromFederation, definePropertyCode]);
134157
}
135158
}
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