Add more details to cache summary report

src/cache-base.ts

@@ -95,9 +95,11 @@ export class GradleStateCache {
     async save(listener: CacheListener): Promise<void> {
         const cacheKey = generateCacheKey(this.cacheName).key
         const restoredCacheKey = core.getState(RESTORED_CACHE_KEY_KEY)
+        const entryListener = listener.entry(this.cacheDescription)
 
         if (restoredCacheKey && cacheKey === restoredCacheKey) {
             core.info(`Cache hit occurred on the cache key ${cacheKey}, not saving cache.`)
+            entryListener.markUnchanged('cache key not changed')
             return
         }
 
@@ -110,7 +112,6 @@ export class GradleStateCache {
 
         core.info(`Caching ${this.cacheDescription} with cache key: ${cacheKey}`)
         const cachePath = this.getCachePath()
-        const entryListener = listener.entry(this.cacheDescription)
         await saveCache(cachePath, cacheKey, entryListener)
 
         return

src/cache-extract-entries.ts

@@ -212,6 +212,7 @@ abstract class AbstractEntryExtractor {
 
         if (previouslyRestoredKey === cacheKey) {
             cacheDebug(`No change to previously restored ${artifactType}. Not saving.`)
+            entryListener.markUnchanged('entry contents unchanged')
         } else {
             core.info(`Caching ${artifactType} with path '${pattern}' and cache key: ${cacheKey}`)
             await saveCache([pattern], cacheKey, entryListener)

src/cache-reporting.ts

@@ -54,6 +54,8 @@ export class CacheEntryListener {
     savedKey: string | undefined
     savedSize: number | undefined
 
+    unchanged: string | undefined
+
     constructor(entryName: string) {
         this.entryName = entryName
     }
@@ -85,6 +87,11 @@ export class CacheEntryListener {
         this.savedSize = 0
         return this
     }
+
+    markUnchanged(message: string): CacheEntryListener {
+        this.unchanged = message
+        return this
+    }
 }
 
 export function logCachingReport(listener: CacheListener): void {
@@ -92,7 +99,7 @@ export function logCachingReport(listener: CacheListener): void {
         return
     }
 
-    core.summary.addHeading('Caching Summary', 3)
+    core.summary.addHeading('Gradle Home Caching Summary', 3)
 
     const entries = listener.cacheEntries
         .map(
@@ -101,8 +108,11 @@ export function logCachingReport(listener: CacheListener): void {
     Requested Key : ${entry.requestedKey ?? ''}
     Restored  Key : ${entry.restoredKey ?? ''}
               Size: ${formatSize(entry.restoredSize)}
+              ${getRestoredMessage(entry)}
     Saved     Key : ${entry.savedKey ?? ''}
-              Size: ${formatSize(entry.savedSize)}`
+              Size: ${formatSize(entry.savedSize)}
+              ${getSavedMessage(entry)}
+---`
         )
         .join('\n')
 
@@ -134,6 +144,29 @@ ${entries}
     )
 }
 
+function getRestoredMessage(entry: CacheEntryListener): string {
+    if (entry.restoredKey === undefined) {
+        return '(No match found)'
+    }
+    if (entry.restoredKey === entry.requestedKey) {
+        return '(Exact match found)'
+    }
+    return '(Fuzzy match found)'
+}
+
+function getSavedMessage(entry: CacheEntryListener): string {
+    if (entry.unchanged) {
+        return `(Entry not saved: ${entry.unchanged})`
+    }
+    if (entry.savedKey === undefined) {
+        return '(Entry not saved: ???'
+    }
+    if (entry.savedSize === 0) {
+        return '(Could not save: entry exists)'
+    }
+    return '(Entry saved)'
+}
+
 function getCount(
     cacheEntries: CacheEntryListener[],
     predicate: (value: CacheEntryListener) => number | undefined