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plugin.ts
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'use strict';
import * as vscode from 'vscode';
import * as path from 'path';
import { Commands } from './commands';
import { extensions } from 'vscode';
export let existingExtensions: Array<string> = [];
export let buildFilePatterns: Array<string> = [];
export function collectJavaExtensions(extensions: readonly vscode.Extension<any>[]): string[] {
const result = [];
if (extensions && extensions.length) {
for (const extension of extensions) {
const contributesSection = extension.packageJSON['contributes'];
if (contributesSection) {
const javaExtensions = contributesSection['javaExtensions'];
if (Array.isArray(javaExtensions) && javaExtensions.length) {
for (const javaExtensionPath of javaExtensions) {
result.push(path.resolve(extension.extensionPath, javaExtensionPath));
}
}
}
}
}
// Make a copy of extensions:
existingExtensions = result.slice();
return result;
}
export function collectBuildFilePattern(extensions: readonly vscode.Extension<any>[]) {
const result = [];
if (extensions && extensions.length) {
for (const extension of extensions) {
const contributesSection = extension.packageJSON['contributes'];
if (contributesSection) {
const buildFilePatterns = contributesSection['javaBuildFilePatterns'];
if (Array.isArray(buildFilePatterns) && buildFilePatterns.length) {
result.push(...buildFilePatterns);
}
}
}
}
buildFilePatterns = result.slice();
return result;
}
export function getBundlesToReload(): string[] {
const previousContributions: string[] = [...existingExtensions];
const currentContributions = collectJavaExtensions(extensions.all);
if (isContributedPartUpdated(previousContributions, currentContributions)) {
return currentContributions;
}
return [];
}
export async function onExtensionChange(extensions: readonly vscode.Extension<any>[]): Promise<void> {
if (isContributedPartUpdated(buildFilePatterns, collectBuildFilePattern(extensions))) {
return promptToReload();
}
const bundlesToRefresh: string[] = getBundlesToReload();
if (bundlesToRefresh.length) {
const success = await vscode.commands.executeCommand(Commands.EXECUTE_WORKSPACE_COMMAND, Commands.REFRESH_BUNDLES, bundlesToRefresh);
if (!success) {
// if hot refreshing bundle fails, fallback to reload window.
return promptToReload();
}
}
}
function promptToReload() {
const msg = `Java Extension Contributions changed, reloading ${vscode.env.appName} is required for the changes to take effect.`;
const action = 'Reload';
const restartId = Commands.RELOAD_WINDOW;
vscode.window.showWarningMessage(msg, action).then((selection) => {
if (action === selection) {
vscode.commands.executeCommand(restartId);
}
});
}
export function isContributedPartUpdated(oldContributedPart: Array<string>, newContributedPart: Array<string>) {
if (!oldContributedPart) {
return false;
}
const oldContribution = new Set(oldContributedPart.slice());
const newContribution = newContributedPart;
const hasChanged = (oldContribution.size !== newContribution.length);
if (!hasChanged) {
for (const newExtension of newContribution) {
if (!oldContribution.has(newExtension)) {
return true;
}
}
}
return hasChanged;
}