add working-directory option

action.yml

@@ -28,6 +28,8 @@ inputs:
   components:
     description: Comma-separated list of components to be additionally installed for a new toolchain
     required: false
+  working-directory:
+    description: Working directory to use for finding rust-toolchain
 
 outputs:
   rustc:

src/args.ts

@@ -35,6 +35,13 @@ function determineToolchain(overrideFile: string): string {
     return rustToolchainFile;
 }
 
+export function setWorkingDirectory() {
+    const workingDirectory = input.getInput("working-directory");
+    if (workingDirectory) {
+        process.chdir(workingDirectory);
+    }
+}
+
 export function getToolchainArgs(overrideFile: string): ToolchainOptions {
     let components: string[] | undefined = input.getInputList("components");
     if (components && components.length === 0) {

src/main.ts

@@ -6,6 +6,7 @@ import * as versions from "./versions";
 import { RustUp, ToolchainOptions } from "@actions-rs/core";
 
 async function run(): Promise<void> {
+    args.setWorkingDirectory();
     // we use path.join to make sure this works on Windows, Linux and MacOS
     const toolchainOverridePath = path.join(process.cwd(), "rust-toolchain");