[WIP] Post test summary comment

src/comment.ts

@@ -0,0 +1,51 @@
+import * as core from '@actions/core'
+import type { Octokit } from '@octokit/action'
+import type { Context } from './github.js'
+import type { TestReport } from './junitxml.js'
+
+export const postComment = async (testReport: TestReport, octokit: Octokit, context: Context) => {}
+
+const format = (testReport: TestReport, context: Context): string => {
+  const rows = []
+  const failedTestCases = testReport.testCases.filter((testCase) => !testCase.success)
+  for (const failedTestCase of failedTestCases) {
+    rows.push([failedTestCase.filename, failedTestCase.name])
+  }
+  const table = `<table>${rows.map((columns) => `<tr>${columns.map((column) => `<td>${column}</td>`).join('')}</tr>`).join('')}</table>`
+}
+
+const createOrUpdateComment = async (body: string, octokit: Octokit, context: Context) => {
+  if (!('pull_request' in context.payload)) {
+    return
+  }
+
+  const { data: comments } = await octokit.rest.issues.listComments({
+    owner: context.repo.owner,
+    repo: context.repo.repo,
+    issue_number: context.payload.pull_request.number,
+    sort: 'created',
+    direction: 'desc',
+    per_page: 100,
+  })
+  core.info(`Found ${comments.length} comments of ${context.payload.pull_request.html_url}`)
+
+  const commentKey = `<!-- ${context.workflow} -->`
+  const existingComment = comments.find((comment) => comment.body?.includes(commentKey))
+  if (existingComment) {
+    core.info(`Updating the existing comment ${existingComment.id} of ${context.payload.pull_request.html_url}`)
+    await octokit.rest.issues.updateComment({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      comment_id: existingComment.id,
+      body: `${body}\n${commentKey}`,
+    })
+  } else {
+    core.info(`Creating a comment into ${context.payload.pull_request.html_url}`)
+    await octokit.rest.issues.createComment({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      issue_number: context.payload.pull_request.number,
+      body: `${body}\n${commentKey}`,
+    })
+  }
+}

src/github.ts

@@ -1,4 +1,10 @@
 import assert from 'node:assert'
+import { Octokit } from '@octokit/action'
+import { retry } from '@octokit/plugin-retry'
+import type { WebhookEvent } from '@octokit/webhooks-types'
+import * as fs from 'fs/promises'
+
+export const getOctokit = () => new (Octokit.plugin(retry))()
 
 export type Context = {
   repo: {
@@ -10,9 +16,10 @@ export type Context = {
   serverUrl: string
   sha: string
   workflow: string
+  payload: WebhookEvent
 }
 
-export const getContext = (): Context => {
+export const getContext = async (): Promise<Context> => {
   // https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables#default-environment-variables
   return {
     repo: getRepo(),
@@ -21,6 +28,7 @@ export const getContext = (): Context => {
     serverUrl: getEnv('GITHUB_SERVER_URL'),
     sha: getEnv('GITHUB_SHA'),
     workflow: getEnv('GITHUB_WORKFLOW'),
+    payload: JSON.parse(await fs.readFile(getEnv('GITHUB_EVENT_PATH'), 'utf-8')) as WebhookEvent,
   }
 }