Persist build-scan-capture init script into Gradle User Home

Instead of writing this file to a temp directory and referencing it
on the Gradle command line, the init script is now written to Gradle
User Home so that it is picked up automatically.

src/build-scan-capture.ts

@@ -1,14 +1,6 @@
 import fs from 'fs'
-import path from 'path'
-import * as core from '@actions/core'
 
-export function writeInitScript(): string {
-    const tmpDir = process.env['RUNNER_TEMP'] || ''
-    const initScript = path.resolve(tmpDir, 'build-scan-capture.init.gradle')
-    core.info(`Writing init script: ${initScript}`)
-    if (fs.existsSync(initScript)) {
-        return initScript
-    }
+export function writeBuildScanCaptureInitScript(initScript: string): void {
     fs.writeFileSync(
         initScript,
         `
@@ -46,5 +38,4 @@ def registerCallbacks(buildScanExtension, rootProjectName) {
 }
 `
     )
-    return initScript
 }

src/cache-gradle-user-home.ts

@@ -7,6 +7,7 @@ import * as exec from '@actions/exec'
 
 import {AbstractCache, CacheEntryListener, CacheListener} from './cache-base'
 import {getCacheKeyPrefix, hashFileNames, tryDelete} from './cache-utils'
+import {writeBuildScanCaptureInitScript} from './build-scan-capture'
 
 const META_FILE_DIR = '.gradle-build-action'
 
@@ -32,6 +33,10 @@ export class GradleUserHomeCache extends AbstractCache {
         const propertiesFile = path.resolve(gradleUserHome, 'gradle.properties')
         this.debug(`Initializing gradle.properties to disable daemon: ${propertiesFile}`)
         fs.writeFileSync(propertiesFile, 'org.gradle.daemon=false')
+
+        const initScript = path.resolve(gradleUserHome, 'init.gradle')
+        this.debug(`Adding init script to capture build scans: ${initScript}`)
+        writeBuildScanCaptureInitScript(initScript)
     }
 
     async afterRestore(listener: CacheListener): Promise<void> {

src/execution.ts

@@ -1,15 +1,10 @@
 import * as exec from '@actions/exec'
 import fs from 'fs'
 import path from 'path'
-import {writeInitScript} from './build-scan-capture'
 
 export async function execute(executable: string, root: string, args: string[]): Promise<BuildResult> {
     let buildScanUrl: string | undefined
 
-    const initScript = writeInitScript()
-    args.push('--init-script')
-    args.push(initScript)
-
     const buildScanFile = path.resolve(root, 'gradle-build-scan.txt')
     if (fs.existsSync(buildScanFile)) {
         fs.unlinkSync(buildScanFile)