Replace forked cache by official npm (#21)

* Replace forked cache by official npm

* Follow the same validation as @action/cache

* Remove debug log

src/cache.ts

@@ -1,9 +1,11 @@
+import * as cache from "@actions/cache"
 import * as core from "@actions/core"
-import restore from "cache/lib/restore"
-import save from "cache/lib/save"
 import * as crypto from "crypto"
 import * as fs from "fs"
 
+import { Events, State } from "./constants"
+import * as utils from "./utils/actionUtils"
+
 function checksumFile(hashName: string, path: string): Promise<string> {
   return new Promise((resolve, reject) => {
     const hash = crypto.createHash(hashName)
@@ -52,30 +54,82 @@ async function buildCacheKeys(): Promise<string[]> {
 }
 
 export async function restoreCache(): Promise<void> {
+  if (!utils.isValidEvent()) {
+    utils.logWarning(
+      `Event Validation Error: The event type ${process.env[Events.Key]} is not supported because it's not tied to a branch or tag ref.`
+    )
+    return
+  }
+
   const startedAt = Date.now()
 
   const keys = await buildCacheKeys()
   const primaryKey = keys.pop()
   const restoreKeys = keys.reverse()
-  core.info(`Primary analysis cache key is '${primaryKey}', restore keys are '${restoreKeys.join(` | `)}'`)
-  process.env[`INPUT_RESTORE-KEYS`] = restoreKeys.join(`\n`)
-  process.env.INPUT_KEY = primaryKey
-
-  process.env.INPUT_PATH = getCacheDirs().join(`\n`)
 
   // Tell golangci-lint to use our cache directory.
   process.env.GOLANGCI_LINT_CACHE = getLintCacheDir()
 
-  await restore()
-  core.info(`Restored cache for golangci-lint from key '${primaryKey}' in ${Date.now() - startedAt}ms`)
+  if (!primaryKey) {
+    utils.logWarning(`Invalid primary key`)
+    return
+  }
+  core.saveState(State.CachePrimaryKey, primaryKey)
+  try {
+    const cacheKey = await cache.restoreCache(getCacheDirs(), primaryKey, restoreKeys)
+    if (!cacheKey) {
+      core.info(`Cache not found for input keys: ${[primaryKey, ...restoreKeys].join(", ")}`)
+      return
+    }
+    // Store the matched cache key
+    utils.setCacheState(cacheKey)
+    const isExactKeyMatch = utils.isExactKeyMatch(primaryKey, cacheKey)
+    utils.setCacheHitOutput(isExactKeyMatch)
+    core.info(`Restored cache for golangci-lint from key '${primaryKey}' in ${Date.now() - startedAt}ms`)
+  } catch (error) {
+    if (error.name === cache.ValidationError.name) {
+      throw error
+    } else {
+      core.warning(error.message)
+    }
+  }
 }
 
 export async function saveCache(): Promise<void> {
+  // Validate inputs, this can cause task failure
+  if (!utils.isValidEvent()) {
+    utils.logWarning(
+      `Event Validation Error: The event type ${process.env[Events.Key]} is not supported because it's not tied to a branch or tag ref.`
+    )
+    return
+  }
+
   const startedAt = Date.now()
 
   const cacheDirs = getCacheDirs()
-  process.env.INPUT_PATH = cacheDirs.join(`\n`)
+  const primaryKey = core.getState(State.CachePrimaryKey)
+  if (!primaryKey) {
+    utils.logWarning(`Error retrieving key from state.`)
+    return
+  }
 
-  await save()
-  core.info(`Saved cache for golangci-lint from paths '${cacheDirs.join(`, `)}' in ${Date.now() - startedAt}ms`)
+  const state = utils.getCacheState()
+
+  if (utils.isExactKeyMatch(primaryKey, state)) {
+    core.info(`Cache hit occurred on the primary key ${primaryKey}, not saving cache.`)
+    return
+  }
+
+  try {
+    await cache.saveCache(cacheDirs, primaryKey)
+    core.info(`Saved cache for golangci-lint from paths '${cacheDirs.join(`, `)}' in ${Date.now() - startedAt}ms`)
+  } 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}`)
+    }
+  }
 }