autobuild: add working-directory input

Author: cklin

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## [UNRELEASED]
 
-No user facing changes.
+- Add `working-directory` input to the `autobuild` action. [#1024](https://github.com/github/codeql-action/pull/1024)
 
 ## 2.1.8 - 08 Apr 2022
 

autobuild/action.yml

@@ -6,6 +6,12 @@ inputs:
     default: ${{ github.token }}
   matrix:
     default: ${{ toJson(matrix) }}
+  working-directory:
+    description: >-
+      Run the autobuilder using this path (relative to $GITHUB_WORKSPACE) as
+      working directory. If this input is not set, the autobuilder runs with
+      $GITHUB_WORKSPACE as its working directory.
+    required: false
 runs:
   using: 'node16'
-  main: '../lib/autobuild-action.js'
+  main: '../lib/autobuild-action.js'

lib/autobuild-action.js

@@ -3,6 +3,7 @@ import * as core from "@actions/core";
 import {
   createStatusReportBase,
   getActionsStatus,
+  getOptionalInput,
   getTemporaryDirectory,
   sendStatusReport,
   StatusReportBase,
@@ -71,6 +72,13 @@ async function run() {
     }
     language = determineAutobuildLanguage(config, logger);
     if (language !== undefined) {
+      const workingDirectory = getOptionalInput("working-directory");
+      if (workingDirectory) {
+        logger.info(
+          `Changing autobuilder working directory to ${workingDirectory}`
+        );
+        process.chdir(workingDirectory);
+      }
       await runAutobuild(language, config, logger);
     }
   } catch (error) {