Add proxy_binary input to start-proxy Action

This allows a custom binary to be used. Mainly for testing.

lib/start-proxy-action.js

@@ -112,7 +112,8 @@ async function runWrapper() {
         ca,
     };
     // Start the Proxy
-    const proxyBin = await getProxyBinaryPath();
+    const proxyBin = actionsUtil.getOptionalInput("proxy_binary") ??
+        (await getProxyBinaryPath());
     await startProxy(proxyBin, proxyConfig, proxyLogFilePath, logger);
 }
 async function startProxy(binPath, config, logFilePath, logger) {

src/start-proxy-action.ts

@@ -119,7 +119,9 @@ async function runWrapper() {
   };
 
   // Start the Proxy
-  const proxyBin = await getProxyBinaryPath();
+  const proxyBin =
+    actionsUtil.getOptionalInput("proxy_binary") ??
+    (await getProxyBinaryPath());
   await startProxy(proxyBin, proxyConfig, proxyLogFilePath, logger);
 }
 

start-proxy/action.yml

@@ -2,6 +2,10 @@ name: "CodeQL: Start proxy"
 description: "[Experimental] Start HTTP proxy server. This action is for internal GitHub used only and will change without notice."
 author: "GitHub"
 inputs:
+  proxy_binary:
+    description: >-
+      A path for the proxy binary to use.
+    required: false
   registry_secrets:
     description: The URLs and credentials of package registries
     required: false