chore(devx): allow running vsix with local mcp proxy when building

point `MCPOWER_LOCAL_PROXY_PATH` env to the local directory containing mcpower proxy. For example:
`MCPOWER_LOCAL_PROXY_PATH=/users/user/workspace/mcpower-proxy npm run package:vsc-extension`

NOTE: the script replaces cursor hooks in-place. Need to make sure not to commit them once done working locally

Author: theyoga

targets/vsc-extension/.vscodeignore

@@ -9,6 +9,8 @@ tsconfig.json
 __mocks__/**
 jest.config.js
 webpack.config.js
+scripts/clean-build.js
+scripts/update-gitleaks-rules.mjs
 
 # Dependencies (bundled by webpack)
 node_modules/**

targets/vsc-extension/src/uvRunner.ts

@@ -37,6 +37,14 @@ export class UvRunner {
     }
 
     getCommand(): UvCommand {
+        // If MCPOWER_LOCAL_PROXY_PATH is set, use the local proxy path
+        if (process.env["MCPOWER_LOCAL_PROXY_PATH"]) {
+            return {
+                executable: "uv",
+                args: ["run", "--directory", process.env["MCPOWER_LOCAL_PROXY_PATH"], "mcpower-proxy"],
+            };
+        }
+
         if (!this.uvxCommand) {
             throw new Error("uvx command not available; initialize() first");
         }

targets/vsc-extension/webpack.config.js

@@ -1,6 +1,22 @@
 const path = require("path");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
 const TerserPlugin = require("terser-webpack-plugin");
+const { DefinePlugin } = require("webpack");
+
+function getSafeEnvs() {
+    const safeKeys = new Set(["CI", "NODE_ENV", "WEBPACK_MODE"]);
+    const safePrefixes = ["MCPOWER_"];
+
+    return Object.entries(process.env).reduce((res, [key, value]) => {
+        if (safeKeys.has(key) || safePrefixes.some(prefix => key.startsWith(prefix))) {
+            console.log(`Defining env ${key} = ${value}`);
+            res[key] = JSON.stringify(value);
+        }
+        return res;
+    }, {});
+}
+
+
 
 /** @type {import('webpack').Configuration} */
 module.exports = {
@@ -59,6 +75,9 @@ module.exports = {
         ],
     },
     plugins: [
+        new DefinePlugin({
+            "process.env": getSafeEnvs(),
+        }),
         new CopyWebpackPlugin({
             patterns: [
                 {
@@ -67,6 +86,23 @@ module.exports = {
                 },
             ],
         }),
+        ...(process.env["MCPOWER_LOCAL_PROXY_PATH"] ? [
+            new CopyWebpackPlugin({
+                    patterns: [
+                        {
+                            from: path.resolve(__dirname, "./scripts/cursor/hooks"),
+                            to: path.resolve(__dirname, "./scripts/cursor/hooks"),
+                            transform(content, absolutePath ) {
+                                console.log(`Transforming ${absolutePath} with ${process.env["MCPOWER_LOCAL_PROXY_PATH"]}`);
+                                let text = content.toString();
+                                text = text.replace(/uvx mcpower-proxy==[0-9]*\.[0-9]*\.[0-9]*/g, `uv run --directory ${process.env["MCPOWER_LOCAL_PROXY_PATH"]} mcpower-proxy`);
+                                return Buffer.from(text);
+                            }
+                        },
+                    ],
+
+                }),
+        ]: []),
     ],
     devtool: false,
     infrastructureLogging: {