Allow changing default cache file size limit

.gitignore

@@ -5,3 +5,4 @@ packages/*/__tests__/_temp/
 .DS_Store
 *.xar
 packages/*/audit.json
+.idea

packages/cache/__tests__/saveCache.test.ts

@@ -1,10 +1,10 @@
 import * as core from '@actions/core'
 import * as path from 'path'
-import {saveCache} from '../src/cache'
+import {saveCache, setFileSizeLimit} from '../src/cache'
 import * as cacheHttpClient from '../src/internal/cacheHttpClient'
 import * as cacheUtils from '../src/internal/cacheUtils'
 import * as config from '../src/internal/config'
-import {CacheFilename, CompressionMethod} from '../src/internal/constants'
+import {CacheFilename, CacheFileSizeLimit, CompressionMethod} from '../src/internal/constants'
 import * as tar from '../src/internal/tar'
 import {TypedResponse} from '@actions/http-client/lib/interfaces'
 import {
@@ -19,6 +19,7 @@ jest.mock('../src/internal/config')
 jest.mock('../src/internal/tar')
 
 beforeAll(() => {
+  setFileSizeLimit(CacheFileSizeLimit)
   jest.spyOn(console, 'log').mockImplementation(() => {})
   jest.spyOn(core, 'debug').mockImplementation(() => {})
   jest.spyOn(core, 'info').mockImplementation(() => {})
@@ -79,6 +80,42 @@ test('save with large cache outputs should fail', async () => {
   expect(getCompressionMock).toHaveBeenCalledTimes(1)
 })
 
+test('save with small cache outputs should fail on changed limit', async () => {
+  setFileSizeLimit(100 * 1024 * 1024) // set default limit to 100 MB
+  const filePath = 'node_modules'
+  const primaryKey = 'Linux-node-bb828da54c148048dd17899ba9fda624811cfb43'
+  const cachePaths = [path.resolve(filePath)]
+
+  const createTarMock = jest.spyOn(tar, 'createTar')
+  const logWarningMock = jest.spyOn(core, 'warning')
+
+  const cacheSize = 1024 * 1024 * 1024 //1GB, over the 100MB limit
+  jest
+    .spyOn(cacheUtils, 'getArchiveFileSizeInBytes')
+    .mockReturnValueOnce(cacheSize)
+  const compression = CompressionMethod.Gzip
+  const getCompressionMock = jest
+    .spyOn(cacheUtils, 'getCompressionMethod')
+    .mockReturnValueOnce(Promise.resolve(compression))
+
+  const cacheId = await saveCache([filePath], primaryKey)
+  expect(cacheId).toBe(-1)
+  expect(logWarningMock).toHaveBeenCalledTimes(1)
+  expect(logWarningMock).toHaveBeenCalledWith(
+    'Failed to save: Cache size of ~1024 MB (1073741824 B) is over the 100MB limit, not saving cache.'
+  )
+
+  const archiveFolder = '/foo/bar'
+
+  expect(createTarMock).toHaveBeenCalledTimes(1)
+  expect(createTarMock).toHaveBeenCalledWith(
+    archiveFolder,
+    cachePaths,
+    compression
+  )
+  expect(getCompressionMock).toHaveBeenCalledTimes(1)
+})
+
 test('save with large cache outputs should fail in GHES with error message', async () => {
   const filePath = 'node_modules'
   const primaryKey = 'Linux-node-bb828da54c148048dd17899ba9fda624811cfb43'

packages/cache/src/cache.ts

@@ -51,6 +51,24 @@ function checkKey(key: string): void {
   }
 }
 
+let fileSizeLimit = CacheFileSizeLimit // default 10GB per repo limit
+let fileSizeLimitStr = formatBytes(fileSizeLimit)
+
+export function setFileSizeLimit(newFileSizeLimit: number){
+  fileSizeLimit = newFileSizeLimit
+  fileSizeLimitStr = formatBytes(newFileSizeLimit)
+}
+
+export function formatBytes(bytes: number): string {
+  if (bytes === 0) return "0 Bytes";
+
+  const sizes = ["Bytes", "KB", "MB", "GB", "TB", "PB"];
+  const i = Math.floor(Math.log(bytes) / Math.log(1024));
+  const value = bytes / Math.pow(1024, i);
+
+  return `${value.toFixed(0)}${sizes[i]}`;
+}
+
 /**
  * isFeatureAvailable to check the presence of Actions cache service
  *
@@ -385,7 +403,7 @@ async function saveCacheV1(
     if (core.isDebug()) {
       await listTar(archivePath, compressionMethod)
     }
-    const fileSizeLimit = 10 * 1024 * 1024 * 1024 // 10GB per repo limit
+
     const archiveFileSize = utils.getArchiveFileSizeInBytes(archivePath)
     core.debug(`File Size: ${archiveFileSize}`)
 
@@ -394,7 +412,7 @@ async function saveCacheV1(
       throw new Error(
         `Cache size of ~${Math.round(
           archiveFileSize / (1024 * 1024)
-        )} MB (${archiveFileSize} B) is over the 10GB limit, not saving cache.`
+        )} MB (${archiveFileSize} B) is over the ${fileSizeLimitStr} limit, not saving cache.`
       )
     }
 
@@ -503,11 +521,11 @@ async function saveCacheV2(
     core.debug(`File Size: ${archiveFileSize}`)
 
     // For GHES, this check will take place in ReserveCache API with enterprise file size limit
-    if (archiveFileSize > CacheFileSizeLimit && !isGhes()) {
+    if (archiveFileSize > fileSizeLimit && !isGhes()) {
       throw new Error(
         `Cache size of ~${Math.round(
           archiveFileSize / (1024 * 1024)
-        )} MB (${archiveFileSize} B) is over the 10GB limit, not saving cache.`
+        )} MB (${archiveFileSize} B) is over the ${fileSizeLimitStr} limit, not saving cache.`
       )
     }