autobuild: add working-directory input

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'

pr-checks/checks/test-autobuild-working-dir.yml

@@ -0,0 +1,30 @@
+name: "Autobuild working directory"
+description: "Tests working-directory input of autobuild action"
+versions: ["latest"]
+os: ["ubuntu-latest"]
+steps:
+  - name: Test setup
+    shell: bash
+    run: |
+      # Make sure that Gradle build succeeds in autobuild-dir ...
+      cp -a ../action/tests/java-repo autobuild-dir
+      # ... and fails if attempted in the current directory
+      echo > build.gradle
+  - uses: ./../action/init
+    with:
+      languages: java
+      tools: ${{ steps.prepare-test.outputs.tools-url }}
+  - uses: ./../action/autobuild
+    with:
+      working-directory: autobuild-dir
+  - uses: ./../action/analyze
+    env:
+      TEST_MODE: true
+  - name: Check database
+    shell: bash
+    run: |
+      cd "$RUNNER_TEMP/codeql_databases"
+      if [[ ! -d java ]]; then
+        echo "Did not find a Java database"
+        exit 1
+      fi

src/autobuild-action.ts

@@ -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) {

tests/java-repo/build.gradle

@@ -0,0 +1,12 @@
+plugins {
+    id 'application'
+}
+
+repositories {
+    mavenCentral()
+}
+
+application {
+    mainClass = 'Main'
+}
+

tests/java-repo/src/main/java/Main.java

@@ -0,0 +1,8 @@
+class Main {
+    public static void main(String args[]) {
+        if (true) {
+            System.out.println("Hello, World!");
+        }
+    }
+}
+