From d0b05955fd842f26a9553c31453a80ffa2a57a30 Mon Sep 17 00:00:00 2001
From: Lucian Rosu <lucian.rosu@snyk.io>
Date: Wed, 31 Aug 2022 17:57:41 +0300
Subject: [PATCH] fix: go binary explicit error

---
 lib/index.ts | 6 ++++++
 package.json | 1 +
 2 files changed, 7 insertions(+)

diff --git a/lib/index.ts b/lib/index.ts
index ed4f215..79d93bc 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,6 +1,7 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import * as tmp from 'tmp';
+import { lookpath } from 'lookpath';
 import debugLib = require('debug');
 import * as graphlib from '@snyk/graphlib';
 import { DepGraphBuilder, DepGraph } from '@snyk/dep-graph';
@@ -43,6 +44,11 @@ interface Options {
 export async function inspect(root, targetFile, options: Options = {}) {
   options.debug ? debugLib.enable('snyk-go-plugin') : debugLib.disable();
 
+  const goPath = await lookpath('go');
+  if (!goPath) {
+    throw new Error('The "go" command is not available on your system. To scan your dependencies in the CLI, you must ensure you have first installed the relevant package manager.');
+  }
+
   const result = await Promise.all([
     getMetaData(root, targetFile),
     getDependencies(root, targetFile, options.args),
diff --git a/package.json b/package.json
index 6a7a276..c43c679 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "@snyk/dep-graph": "^1.23.1",
     "@snyk/graphlib": "2.1.9-patch.3",
     "debug": "^4.1.1",
+    "lookpath": "^1.2.2",
     "snyk-go-parser": "1.4.1",
     "tmp": "0.2.1",
     "tslib": "^1.10.0"