feat: add ability to run commitlint on events that are not pull requests

For any event that is not of type `pull_request`, we consider there will be a `GITHBU_SHA` defined and run lint against only this specific commit
sha.
This supports not only events of type `pull` but also other events that provide us a `GITHBU_SHA`, like `check_suite`.

Author: wagoid

.github/workflows/test.yml

@@ -0,0 +1,11 @@
+name: Test
+on: [push]
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v1
+      - uses: ./

package-lock.json

@@ -16,6 +16,7 @@
   "homepage": "https://github.com/wagoid/commitlint-github-action",
   "dependencies": {
     "@actions/core": "1.1.1",
+    "@actions/exec": "1.0.1",
     "@actions/github": "1.1.0",
     "@commitlint/config-angular": "8.2.0",
     "@commitlint/config-conventional": "7.6.0",
@@ -24,9 +25,9 @@
     "@commitlint/format": "8.2.0",
     "@commitlint/lint": "8.2.0",
     "@commitlint/load": "8.2.0",
-    "@commitlint/read": "8.2.0",
     "commitlint-config-jira": "1.0.9",
-    "conventional-changelog-lint-config-canonical": "1.0.0"
+    "conventional-changelog-lint-config-canonical": "1.0.0",
+    "git-raw-commits": "2.0.2"
   },
   "devDependencies": {
     "conventional-changelog-cli": "2.0.23",

package.json

@@ -1,21 +1,26 @@
-const { existsSync, readFileSync } = require('fs')
+const { existsSync } = require('fs')
 const { resolve } = require('path')
 const core = require('@actions/core')
 const github = require('@actions/github')
-const read = require('@commitlint/read')
+const exec = require('@actions/exec')
 const lint = require('@commitlint/lint')
 const { format } = require('@commitlint/format')
 const load = require('@commitlint/load')
+const gitRawCommits = require('git-raw-commits')
 
-const githubToken = process.env.GITHUB_TOKEN
+const pullRequestEvent = 'pull_request'
+
+const { GITHUB_TOKEN, GITHUB_EVENT_NAME, GITHUB_SHA } = process.env
 
 const configPath = resolve(
   process.env.GITHUB_WORKSPACE,
   core.getInput('configFile'),
 )
 
 const getRangeFromPullRequest = async () => {
-  const octokit = new github.GitHub(githubToken)
+  if (GITHUB_EVENT_NAME !== pullRequestEvent) return [null, GITHUB_SHA]
+
+  const octokit = new github.GitHub(GITHUB_TOKEN)
   const { owner, repo, number } = github.context.issue
   const { data: commits } = await octokit.pulls.listCommits({
     owner,
@@ -29,8 +34,30 @@ const getRangeFromPullRequest = async () => {
   return [from, to]
 }
 
+function getHistoryCommits(from, to) {
+  const options = {
+    from,
+    to,
+  }
+
+  if (!from) {
+    options.maxCount = 1
+  }
+
+  return new Promise((resolve, reject) => {
+    const data = []
+
+    gitRawCommits(options)
+      .on('data', chunk => data.push(chunk.toString('utf-8')))
+      .on('error', reject)
+      .on('end', () => {
+        resolve(data)
+      })
+  })
+}
+
 const showLintResults = async ([from, to]) => {
-  const commits = await read({ from, to })
+  const commits = await getHistoryCommits(from, to)
   const config = existsSync(configPath)
     ? await load({}, { file: configPath })
     : {}
@@ -46,18 +73,17 @@ const showLintResults = async ([from, to]) => {
     },
   )
 
-  if (formattedResults.length) {
-    process.stderr.write(formattedResults)
-    process.exit(1)
+  if (formattedResults) {
+    core.setFailed(
+      `You have commit messages with errors\n\n${formattedResults}`,
+    )
   } else {
     console.log('Lint free! 🎉')
   }
 }
 
 const exitWithMessage = message => error => {
-  console.log(message)
-  console.error(error)
-  process.exit(1)
+  core.setFailed(`${message}\n${error}`)
 }
 
 const main = () =>