refactor: use @octokit/webhooks-types for stronger typing

package.json

@@ -68,12 +68,12 @@
   },
   "dependencies": {
     "@actions/core": "1.10.1",
-    "@actions/github": "6.0.0",
-    "valibot": "0.42.1"
+    "@actions/github": "6.0.0"
   },
   "devDependencies": {
     "@eslint/js": "9.11.1",
     "@octokit/openapi-types": "22.2.0",
+    "@octokit/webhooks-types": "7.5.1",
     "@types/eslint-config-prettier": "6.11.3",
     "@types/eslint__js": "8.42.3",
     "@types/jest": "29.5.13",

src/main.ts

@@ -4,6 +4,7 @@ import { getRef } from './ref.js'
 import type * as types from '@octokit/openapi-types'
 import { getInputs } from './get-inputs.js'
 import { convertRef } from './internal/utils.js'
+import type { StrictContext } from './types.js'
 
 type Cache =
   types.components['schemas']['actions-cache-list']['actions_caches'][number]
@@ -56,7 +57,7 @@ export async function run(): Promise<void> {
     const octokit = github.getOctokit(token)
 
     // get repostiory information
-    const { repo, eventName, payload } = github.context
+    const context = github.context as StrictContext
 
     const infoNull = (name: string): never[] => {
       core.info(`🤔 Could not determine deletion target: ${name}`)
@@ -68,15 +69,13 @@ export async function run(): Promise<void> {
 
     const refs: string[] =
       branchNames.length === 0
-        ? [getRef({ eventName, payload })].flatMap(x =>
-            x ? x : infoNull(eventName)
-          )
+        ? [getRef(context)].flatMap(x => (x ? x : infoNull(context.eventName)))
         : branchNames
             .map(branchName => convertRef(branchName, { refType: 'branch' }))
             .filter(ref => ref !== null)
 
     for (const ref of refs) {
-      await deleteRefActionsCaches(octokit, repo, ref, isDryRun)
+      await deleteRefActionsCaches(octokit, context.repo, ref, isDryRun)
     }
 
     core.info(`${prefix({ isDryRun })}✅ Done`)

src/ref.ts

@@ -1,77 +1,60 @@
-import { WebhookPayload } from '@actions/github/lib/interfaces.js'
-import {
-  optionalStringParser,
-  nullableStringParser,
-  stringParser
-} from './parser.js'
 import { convertRef } from './internal/utils.js'
+import type { StrictContext } from './types.js'
 
 export const getRef = ({
   eventName,
   payload
-}: {
-  eventName: string
-  payload: WebhookPayload
-}): string | null => {
+}: StrictContext): string | null => {
   switch (eventName) {
     case 'check_run':
-      return convertRef(
-        nullableStringParser(payload.check_run.check_suite.head_branch),
-        { refType: 'branch' }
-      )
+      return convertRef(payload.check_run.check_suite.head_branch, {
+        refType: 'branch'
+      })
     case 'check_suite':
-      return convertRef(nullableStringParser(payload.check_suite.head_branch), {
+      return convertRef(payload.check_suite.head_branch, {
         refType: 'branch'
       })
     case 'create':
     case 'delete':
-      return convertRef(nullableStringParser(payload.ref), {
+      return convertRef(payload.ref, {
         refType: payload.ref_type
       })
     case 'deployment_status':
-      return convertRef(
-        optionalStringParser(payload.workflow_run?.head_branch),
-        {
-          refType: 'branch'
-        }
-      )
+      return convertRef(payload.workflow_run?.head_branch, {
+        refType: 'branch'
+      })
     case 'issue_comment':
-      return convertRef(stringParser(payload.issue?.number.toString()), {
+      return convertRef(payload.issue.number.toString(), {
         refType: 'pull'
       })
     case 'merge_group':
-      return stringParser(payload.merge_group.head_ref)
+      return payload.merge_group.head_ref
     case 'pull_request':
     case 'pull_request_review':
     case 'pull_request_review_comment':
     case 'pull_request_target':
-      return convertRef(payload.pull_request?.number.toString(), {
+      return convertRef(payload.pull_request.number.toString(), {
         refType: 'pull'
       })
     case 'push':
-      return stringParser(payload.ref)
+      return payload.ref
     case 'registry_package':
       return convertRef(
-        optionalStringParser(
-          payload.registry_package?.package_version?.release?.tag_name
-        ),
+        payload.registry_package.package_version?.release?.tag_name,
         {
           refType: 'tag'
         }
       )
     case 'release':
-      return convertRef(stringParser(payload.release.tag_name), {
+      return convertRef(payload.release.tag_name, {
         refType: 'tag'
       })
     case 'workflow_dispatch':
-      return stringParser(payload.ref)
+      return payload.ref
     case 'workflow_run':
-      return convertRef(
-        nullableStringParser(payload.workflow_run.head_branch),
-        {
-          refType: 'branch'
-        }
-      )
+      return convertRef(payload.workflow_run.head_branch, {
+        refType: 'branch'
+      })
     default:
       throw new Error(`${eventName} event is not supported.`)
   }

src/types.ts

@@ -0,0 +1,33 @@
+import type { Context } from '@actions/github/lib/context.js'
+import type { EventPayloadMap } from '@octokit/webhooks-types'
+
+type WorkflowEventPayloadMap = EventPayloadMap & {
+  // https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#pull_request_target
+  pull_request_target: EventPayloadMap['pull_request']
+}
+
+type PayloadAndEventName<TName extends keyof WorkflowEventPayloadMap> = Omit<
+  Context,
+  'payload' | 'eventName'
+> & {
+  payload: WorkflowEventPayloadMap[TName]
+  eventName: TName
+}
+
+export type StrictContext =
+  | PayloadAndEventName<'check_run'>
+  | PayloadAndEventName<'check_suite'>
+  | PayloadAndEventName<'create'>
+  | PayloadAndEventName<'delete'>
+  | PayloadAndEventName<'deployment_status'>
+  | PayloadAndEventName<'issue_comment'>
+  | PayloadAndEventName<'merge_group'>
+  | PayloadAndEventName<'pull_request'>
+  | PayloadAndEventName<'pull_request_review'>
+  | PayloadAndEventName<'pull_request_review_comment'>
+  | PayloadAndEventName<'pull_request_target'>
+  | PayloadAndEventName<'push'>
+  | PayloadAndEventName<'registry_package'>
+  | PayloadAndEventName<'release'>
+  | PayloadAndEventName<'workflow_dispatch'>
+  | PayloadAndEventName<'workflow_run'>