Initial implementation of the extension

.gitignore

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+node_modules
+.browser_modules
+lib
+*.log
+*-app/*
+!*-app/package.json

package.json

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+{
+  "name": "@eclipse-che/che-theia-hosted-plugin-manager-extension",
+  "keywords": [
+    "theia-extension"
+  ],
+  "version": "0.0.1",
+  "files": [
+    "lib",
+    "node"
+  ],
+  "dependencies": {
+    "@theia/core": "0.3.10",
+    "@theia/plugin-ext": "0.3.10",
+    "@eclipse-che/workspace-client": "latest"
+  },
+  "devDependencies": {
+    "rimraf": "^2.6.2",
+    "typescript": "2.7.2"
+  },
+  "scripts": {
+    "prepare": "yarn run clean && yarn run build",
+    "clean": "rimraf lib",
+    "build": "tsc",
+    "watch": "tsc -w"
+  },
+  "theiaExtensions": [
+    {
+      "backend": "lib/node/hosted-plugin-manager-contribution-extension-backend-module"
+    }
+  ]
+}

src/node/che-workspace-hosted-plugin-uri-post-processor.ts

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+/*
+ * Copyright (C) 2018 Red Hat, Inc. and others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+import { injectable } from "inversify";
+import URI from "@theia/core/lib/common/uri";
+import { HostedPluginUriPostProcessor } from "@theia/plugin-ext";
+import WorkspaceClient, { IRemoteAPI, IWorkspace, IServer, IRestAPIConfig } from '@eclipse-che/workspace-client';
+
+@injectable()
+export class CheWorkspaceHostedPluginUriPostProcessor implements HostedPluginUriPostProcessor {
+    protected restApiClient: IRemoteAPI;
+
+    constructor() {
+        const restAPIConfig: IRestAPIConfig = {};
+        restAPIConfig.baseUrl = process.env.CHE_API;
+        const token = process.env.CHE_MACHINE_TOKEN;
+        if (token) {
+            restAPIConfig.headers = {};
+            restAPIConfig.headers['Authorization'] = token;
+        }
+        this.restApiClient = WorkspaceClient.getRestApi(restAPIConfig);
+    }
+
+    async processUri(uri: URI): Promise<URI> {
+        const hostedPluginTheiaInstanceServer = await this.getHostedPluginTheiaInnstanceServer();
+        if (!hostedPluginTheiaInstanceServer) {
+            throw new Error('No server with type "ide-dev" found.');
+        }
+
+        const externalUri = new URI(hostedPluginTheiaInstanceServer.url);
+        return externalUri;
+    }
+
+    /**
+     * Searches for server which exposes hosted Theia instance.
+     * The server label is the attribute "type": "ide-dev".
+     */
+    protected async getHostedPluginTheiaInnstanceServer(): Promise<IServer | undefined> {
+        const workspace = await this.getCurrentWorkspace();
+        if (!workspace.runtime) {
+            throw new Error('Workspace is not running.');
+        }
+
+        const machines = workspace.runtime.machines;
+        for (let machineName in machines) {
+            const servers = machines[machineName].servers;
+            for (let serverName in servers) {
+                const serverAttributes = servers[serverName].attributes;
+                if (serverAttributes && serverAttributes['type'] === 'ide-dev') {
+                    return servers[serverName];
+                }
+            }
+        }
+        return undefined;
+    }
+
+    protected async getCurrentWorkspace(): Promise<IWorkspace> {
+        const workspaceId = process.env.CHE_WORKSPACE_ID;
+        if (!workspaceId) {
+            throw new Error('Environment variable CHE_WORKSPACE_ID is not set.');
+        }
+        return await this.restApiClient.getById<IWorkspace>(workspaceId);
+    }
+
+}

src/node/hosted-plugin-manager-contribution-extension-backend-module.ts

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+/*
+ * Copyright (C) 2018 Red Hat, Inc. and others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+import { ContainerModule } from "inversify";
+import { HostedPluginUriPostProcessorSymbolName } from "@theia/plugin-ext";
+import { CheWorkspaceHostedPluginUriPostProcessor } from "./che-workspace-hosted-plugin-uri-post-processor";
+
+export default new ContainerModule(bind => {
+    bind(Symbol.for(HostedPluginUriPostProcessorSymbolName)).to(CheWorkspaceHostedPluginUriPostProcessor);
+});

tsconfig.json

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+{
+    "compilerOptions": {
+        "strict": true,
+        "experimentalDecorators": true,
+        "noUnusedLocals": true,
+        "emitDecoratorMetadata": true,
+        "downlevelIteration": true,
+        "module": "commonjs",
+        "moduleResolution": "node",
+        "target": "es5",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "sourceMap": true,
+        "rootDir": "src",
+        "outDir": "lib"
+    },
+    "include": [
+        "src"
+    ]
+}