Add caching of Gradle build configuration cache

action.yml

@@ -32,6 +32,15 @@ inputs:
   dependencies-cache-exact:
     description: Whether to restore only if exact match, default to 'false'
     required: false
+  configuration-cache-enabled:
+    description: Whether caching build configuration is enabled or not, default to 'false'
+    required: false
+  configuration-cache-key:
+    description: Globs of files to hash in the build root directory, separated by new lines, use best-effort if unset
+    required: false
+  configuration-cache-exact:
+    description: Whether to restore only if exact match, default to 'false'
+    required: false
 
 outputs:
   build-scan-url:

src/cache-configuration.ts

@@ -0,0 +1,96 @@
+import path from 'path'
+import fs from 'fs'
+
+import * as core from '@actions/core'
+import * as cache from '@actions/cache'
+
+import * as github from './github-utils'
+import * as crypto from './crypto-utils'
+
+import {inputCacheKeyGlobs, tryDeleteFiles} from './cache-dependencies'
+
+const CONFIGURATION_CACHE_PATH = 'CONFIGURATION_CACHE_PATH'
+const CONFIGURATION_CACHE_KEY = 'CONFIGURATION_CACHE_KEY'
+const CONFIGURATION_CACHE_RESULT = 'CONFIGURATION_CACHE_RESULT'
+
+export async function restoreCachedConfiguration(
+    rootDir: string
+): Promise<void> {
+    if (isConfigurationCacheDisabled()) return
+
+    const cachePath = path.resolve(rootDir, '.gradle/configuration-cache')
+    core.saveState(CONFIGURATION_CACHE_PATH, cachePath)
+
+    const inputCacheExact = github.inputBoolean('configuration-cache-exact')
+    const cacheKeyGlobs = inputCacheKeyGlobs('configuration-cache-key')
+
+    const hash = await crypto.hashFiles(rootDir, cacheKeyGlobs)
+    const cacheKeyPrefix = 'configuration-'
+    const cacheKey = `${cacheKeyPrefix}${hash}`
+    core.saveState(CONFIGURATION_CACHE_KEY, cacheKey)
+
+    const cacheResult = await cache.restoreCache(
+        [cachePath],
+        cacheKey,
+        inputCacheExact ? [] : [cacheKeyPrefix]
+    )
+
+    if (!cacheResult) {
+        core.info(
+            'Configuration cache not found, expect task graph calculation.'
+        )
+        return
+    }
+
+    core.saveState(CONFIGURATION_CACHE_RESULT, cacheResult)
+    core.info(`Configuration restored from cache key: ${cacheResult}`)
+    return
+}
+
+export async function cacheConfiguration(): Promise<void> {
+    if (isConfigurationCacheDisabled()) return
+
+    const cachePath = core.getState(CONFIGURATION_CACHE_PATH)
+    const cacheKey = core.getState(CONFIGURATION_CACHE_KEY)
+    const cacheResult = core.getState(CONFIGURATION_CACHE_RESULT)
+
+    if (!cachePath || !fs.existsSync(cachePath)) {
+        core.debug('No configuration to cache.')
+        return
+    }
+
+    if (cacheResult && cacheKey === cacheResult) {
+        core.info(
+            `Configuration cache hit occurred on the cache key ${cacheKey}, not saving cache.`
+        )
+        return
+    }
+
+    const locksDeleted = tryDeleteFiles([
+        path.resolve(cachePath, 'configuration-cache.lock')
+    ])
+    if (!locksDeleted) {
+        core.warning(
+            'Unable to delete configuration lock files, try using --no-daemon or stopping the daemon last if you have several Gradle steps, not saving cache.'
+        )
+        return
+    }
+
+    try {
+        await cache.saveCache([cachePath], cacheKey)
+    } catch (error) {
+        if (error.name === cache.ValidationError.name) {
+            throw error
+        } else if (error.name === cache.ReserveCacheError.name) {
+            core.info(error.message)
+        } else {
+            core.info(`[warning] ${error.message}`)
+        }
+    }
+
+    return
+}
+
+function isConfigurationCacheDisabled(): boolean {
+    return !github.inputBoolean('configuration-cache-enabled', false)
+}

src/cache-dependencies.ts

@@ -21,16 +21,7 @@ export async function restoreCachedDependencies(
     core.saveState(DEPENDENCIES_CACHE_PATH, cachePath)
 
     const inputCacheExact = github.inputBoolean('dependencies-cache-exact')
-
+    const cacheKeyGlobs = inputCacheKeyGlobs('dependencies-cache-key')
-    const inputCacheKeyGlobs = github.inputArrayOrNull('dependencies-cache-key')
-    const cacheKeyGlobs = inputCacheKeyGlobs
-        ? inputCacheKeyGlobs
-        : [
-              '**/*.gradle',
-              '**/*.gradle.kts',
-              '**/gradle.properties',
-              'gradle/**'
-          ]
 
     const hash = await crypto.hashFiles(rootDir, cacheKeyGlobs)
     const cacheKeyPrefix = 'dependencies-'
@@ -97,7 +88,7 @@ export async function cacheDependencies(): Promise<void> {
     return
 }
 
-function tryDeleteFiles(filePaths: string[]): boolean {
+export function tryDeleteFiles(filePaths: string[]): boolean {
     let failure = false
     for (const filePath of filePaths) {
         if (fs.existsSync(filePath)) {
@@ -114,3 +105,15 @@ function tryDeleteFiles(filePaths: string[]): boolean {
 function isDependenciesCacheDisabled(): boolean {
     return !github.inputBoolean('dependencies-cache-enabled', false)
 }
+
+export function inputCacheKeyGlobs(input: string): string[] {
+    const inputValue = github.inputArrayOrNull(input)
+    return inputValue
+        ? inputValue
+        : [
+              '**/*.gradle',
+              '**/*.gradle.kts',
+              '**/gradle.properties',
+              'gradle/**'
+          ]
+}

src/execution.ts

@@ -1,5 +1,6 @@
 import * as exec from '@actions/exec'
 import * as cacheDependencies from './cache-dependencies'
+import * as cacheConfiguration from './cache-configuration'
 
 export async function execute(
     executable: string,
@@ -7,6 +8,7 @@ export async function execute(
     argv: string[]
 ): Promise<BuildResult> {
     await cacheDependencies.restoreCachedDependencies(root)
+    await cacheConfiguration.restoreCachedConfiguration(root)
 
     let publishing = false
     let buildScanUrl: string | undefined

src/post.ts

@@ -1,10 +1,12 @@
 import * as cacheWrapper from './cache-wrapper'
 import * as cacheDependencies from './cache-dependencies'
+import * as cacheConfiguration from './cache-configuration'
 
 // Invoked by GitHub Actions
 export async function run(): Promise<void> {
     await cacheWrapper.cacheWrapperDist()
     await cacheDependencies.cacheDependencies()
+    await cacheConfiguration.cacheConfiguration()
 }
 
 run()