feat: add action code

.gitignore

@@ -0,0 +1 @@
+node_modules/

.npmrc

@@ -0,0 +1,2 @@
+save-exact=true
+package-lock=true

.prettierrc.json

@@ -0,0 +1,9 @@
+{
+  "printWidth": 60,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": true
+}

action.yml

@@ -0,0 +1,15 @@
+# https://help.github.com/en/actions/automating-your-workflow-with-github-actions/metadata-syntax-for-github-actions
+name: 'Cypress'
+description: 'GitHub Action for running Cypress end-to-end tests'
+author: 'Gleb Bahmutov'
+inputs:
+  record:
+    description: 'Sends test results to Cypress Dashboard'
+    required: false
+    default: false
+runs:
+  using: 'node12'
+  main: 'index.js'
+branding:
+  color: 'green'
+  icon: 'check-square'

index.js

@@ -0,0 +1,138 @@
+// @ts-check
+const core = require('@actions/core')
+const exec = require('@actions/exec')
+const hasha = require('hasha')
+const { restoreCache, saveCache } = require('cache/lib/index')
+
+const packageLockHash = hasha.fromFileSync('./package-lock.json')
+const platformAndArch = `${process.platform}-${process.arch}`
+
+const NPM_CACHE = (() => {
+  const o = {
+    inputPath: '~/.npm',
+    restoreKeys: `npm-${platformAndArch}-`
+  }
+  o.primaryKey = o.restoreKeys + packageLockHash
+  return o
+})()
+
+const CYPRESS_BINARY_CACHE = (() => {
+  const o = {
+    inputPath: '~/.cache/Cypress',
+    restoreKeys: `cypress-${platformAndArch}-`
+  }
+  o.primaryKey = o.restoreKeys + packageLockHash
+  return o
+})()
+
+const restoreCachedNpm = () => {
+  console.log('trying to restore cached NPM modules')
+  return restoreCache(
+    NPM_CACHE.inputPath,
+    NPM_CACHE.primaryKey,
+    NPM_CACHE.restoreKeys
+  )
+}
+
+const saveCachedNpm = () => {
+  console.log('saving NPM modules')
+  return saveCache(NPM_CACHE.inputPath, NPM_CACHE.primaryKey)
+}
+
+const restoreCachedCypressBinary = () => {
+  console.log('trying to restore cached Cypress binary')
+  return restoreCache(
+    CYPRESS_BINARY_CACHE.inputPath,
+    CYPRESS_BINARY_CACHE.primaryKey,
+    CYPRESS_BINARY_CACHE.restoreKeys
+  )
+}
+
+const saveCachedCypressBinary = () => {
+  console.log('saving Cypress binary')
+  return saveCache(
+    CYPRESS_BINARY_CACHE.inputPath,
+    CYPRESS_BINARY_CACHE.primaryKey
+  )
+}
+
+const install = () => {
+  console.log('installing NPM dependencies')
+  // prevent lots of progress messages during install
+  core.exportVariable('CI', '1')
+  return exec.exec('npm ci')
+}
+
+const verifyCypressBinary = () => {
+  console.log('Verifying Cypress')
+  return exec.exec('npx cypress verify')
+}
+
+/**
+ * Grabs a boolean GitHub Action parameter input and casts it.
+ * @param {string} name - parameter name
+ * @param {boolean} defaultValue - default value to use if the parameter was not specified
+ * @returns {boolean} converted input argument or default value
+ */
+const getInputBool = (name, defaultValue = false) => {
+  const param = core.getInput(name)
+  if (param === 'true' || param === '1') {
+    return true
+  }
+  if (param === 'false' || param === '0') {
+    return false
+  }
+
+  return defaultValue
+}
+
+const runTests = () => {
+  const runTests = getInputBool('runTests', true)
+  if (!runTests) {
+    console.log('Skipping running tests: runTests parameter is false')
+    return
+  }
+
+  console.log('Running Cypress tests')
+
+  const record = getInputBool('record')
+  const parallel = getInputBool('parallel')
+
+  let cmd = 'npx cypress run'
+  if (record) {
+    cmd += ' --record'
+  }
+  if (parallel) {
+    // on GitHub Actions we can use workflow name and SHA commit to tie multiple jobs together
+    const parallelId = `${process.env.GITHUB_WORKFLOW} - ${
+      process.env.GITHUB_SHA
+    }`
+    cmd += ` --parallel --ci-build-id "${parallelId}"`
+  }
+  const group = core.getInput('group')
+  if (group) {
+    cmd += ` --group "${group}"`
+  }
+  console.log('Cypress test command: %s', cmd)
+
+  core.exportVariable('TERM', 'xterm')
+  return exec.exec(cmd)
+}
+
+Promise.all([restoreCachedNpm(), restoreCachedCypressBinary()])
+  .then(([npmCacheHit, cypressCacheHit]) => {
+    console.log('npm cache hit', npmCacheHit)
+    console.log('cypress cache hit', cypressCacheHit)
+
+    if (!npmCacheHit || !cypressCacheHit) {
+      return install()
+        .then(verifyCypressBinary)
+        .then(saveCachedNpm)
+        .then(saveCachedCypressBinary)
+    }
+  })
+  .then(runTests)
+  .catch(error => {
+    console.log(error)
+    core.setFailed(error.message)
+  })

package.json

@@ -4,18 +4,35 @@
   "description": "GitHub Action for running Cypress end-to-end tests",
   "private": false,
   "main": "index.js",
+  "files": [
+    "index.js",
+    "action.yml"
+  ],
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/cypress-io/github-action.git"
   },
-  "keywords": [],
+  "keywords": [
+    "actions",
+    "cypress-io"
+  ],
   "author": "Gleb Bahmutov <gleb@cypress.io>",
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/cypress-io/github-action/issues"
   },
-  "homepage": "https://github.com/cypress-io/github-action#readme"
+  "homepage": "https://github.com/cypress-io/github-action#readme",
+  "dependencies": {
+    "@actions/core": "1.2.0",
+    "@actions/exec": "1.0.1",
+    "cache": "github:cypress-io/github-actions-cache#8bec6cc",
+    "hasha": "5.1.0"
+  },
+  "devDependencies": {
+    "prettier": "1.19.1",
+    "@types/node": "^12.0.4"
+  }
 }