Check for local autofix

Author: Jami Cogswell

extensions/ql-vscode/src/variant-analysis/view-autofixes.ts

@@ -5,6 +5,9 @@ import type { Credentials } from "../common/authentication";
 import type { NotificationLogger } from "../common/logging";
 import type { App } from "../common/app";
 import type { CodeQLCliServer } from "../codeql-cli/cli";
+import { pathExists } from "fs-extra";
+import { withProgress, progressUpdate } from "../common/vscode/progress";
+import type { ProgressCallback } from "../common/vscode/progress";
 
 /**
  * Generates autofixes for the results of a variant analysis.
@@ -19,5 +22,34 @@ export async function viewAutofixesForVariantAnalysisResults(
   app: App,
   cliServer: CodeQLCliServer,
 ): Promise<void> {
-  // TODO
+  await withProgress(
+    async (progress: ProgressCallback) => {
+      // Get the path to the local autofix installation.
+      progress(progressUpdate(1, 4, `Checking for local autofix installation`));
+      const localAutofixPath = findLocalAutofix();
+
+      // TODO
+    },
+    {
+      title: "Generating Autofixes",
+      cancellable: false, // not cancellable for now
+    },
+  );
+}
+
+/**
+ * Finds the local autofix installation path from the AUTOFIX_PATH environment variable.
+ * Throws an error if the path is not set or does not exist.
+ * @returns An object containing the local autofix path.
+ * @throws Error if the AUTOFIX_PATH environment variable is not set or the path does not exist.
+ */
+function findLocalAutofix(): string {
+  const localAutofixPath = process.env.AUTOFIX_PATH;
+  if (!localAutofixPath) {
+    throw new Error("Path to local autofix installation not found.");
+  }
+  if (!pathExists(localAutofixPath)) {
+    throw new Error(`Local autofix path ${localAutofixPath} does not exist.`);
+  }
+  return localAutofixPath;
 }