Add configuration cli option

CHANGELOG.md

@@ -19,6 +19,10 @@ See the [migration guide](./docs/migration.md) for details of how to migrate fro
 
 ### Added
 
+* `--config` option to the CLI. It allows you to specify a configuration file other than `cucumber.js`.
+  See [docs/profiles.md](./docs/profiles.md#using-another-file-than-cucumberjs) for more info.
+  [#1794](https://github.com/cucumber/cucumber-js/pull/1794)
+
 ### Changed
 
 ### Deprecated

docs/profiles.md

@@ -39,3 +39,12 @@ Some notes about how Profiles work:
 
 - The `--profile` CLI option is repeatable, so you can apply multiple profiles at once.
 - You can still supply options directly on the command line when using profiles, they will be appended to whatever comes from profiles.
+
+## Using another file than `cucumber.js`
+
+Run `cucumber-js` with `--config` - or `-c` - to specify your configuration file
+if it is something else than the default `cucumber.js`.
+
+```shell
+$ cucumber-js --config .cucumber-rc.js
+```

features/profiles.feature

@@ -69,3 +69,25 @@ Feature: default command line arguments
       1 step (1 passed)
       <duration-stat>
       """
+
+  Scenario Outline: specifying a configuration file
+    Given a file named ".cucumber-rc.js" with:
+      """
+      module.exports = {
+        'default': '--dry-run'
+      };
+      """
+    When I run cucumber-js with `<OPT> .cucumber-rc.js`
+    Then it outputs the text:
+      """
+      -
+
+      1 scenario (1 skipped)
+      1 step (1 skipped)
+      <duration-stat>
+      """
+
+    Examples:
+      | OPT      |
+      | -c       |
+      | --config |

src/cli/argv_parser.ts

@@ -20,6 +20,7 @@ export interface IParsedArgvFormatOptions {
 
 export interface IParsedArgvOptions {
   backtrace: boolean
+  config: string
   dryRun: boolean
   exit: boolean
   failFast: boolean
@@ -106,6 +107,11 @@ const ArgvParser = {
       .usage('[options] [<GLOB|DIR|FILE[:LINE]>...]')
       .version(version, '-v, --version')
       .option('-b, --backtrace', 'show full backtrace for errors')
+      .option(
+        '-c, --config <TYPE[:PATH]>',
+        'specify configuration file',
+        'cucumber.js'
+      )
       .option(
         '-d, --dry-run',
         'invoke formatters without executing steps',

src/cli/helpers.ts

@@ -26,7 +26,10 @@ export async function getExpandedArgv({
 }: IGetExpandedArgvRequest): Promise<string[]> {
   const { options } = ArgvParser.parse(argv)
   let fullArgv = argv
-  const profileArgv = await new ProfileLoader(cwd).getArgv(options.profile)
+  const profileArgv = await new ProfileLoader(cwd).getArgv(
+    options.profile,
+    options.config
+  )
   if (profileArgv.length > 0) {
     fullArgv = argv.slice(0, 2).concat(profileArgv).concat(argv.slice(2))
   }

src/cli/profile_loader.ts

@@ -10,8 +10,12 @@ export default class ProfileLoader {
     this.directory = directory
   }
 
-  async getDefinitions(): Promise<Record<string, string>> {
-    const definitionsFilePath = path.join(this.directory, 'cucumber.js')
+  async getDefinitions(configFile?: string): Promise<Record<string, string>> {
+    const definitionsFilePath: string = path.join(
+      this.directory,
+      configFile || 'cucumber.js'
+    )
+
     const exists = await fs.exists(definitionsFilePath)
     if (!exists) {
       return {}
@@ -23,8 +27,8 @@ export default class ProfileLoader {
     return definitions
   }
 
-  async getArgv(profiles: string[]): Promise<string[]> {
-    const definitions = await this.getDefinitions()
+  async getArgv(profiles: string[], configFile?: string): Promise<string[]> {
+    const definitions = await this.getDefinitions(configFile)
     if (profiles.length === 0 && doesHaveValue(definitions.default)) {
       profiles = ['default']
     }

src/cli/profile_loader_spec.ts

@@ -10,6 +10,7 @@ import { doesHaveValue, valueOrDefault } from '../value_checker'
 interface TestProfileLoaderOptions {
   definitionsFileContent?: string
   profiles?: string[]
+  configFile?: string
 }
 
 async function testProfileLoader(
@@ -18,14 +19,24 @@ async function testProfileLoader(
   const cwd = await promisify<DirOptions, string>(tmp.dir)({
     unsafeCleanup: true,
   })
+  let configurationFileName = 'cucumber.js'
+
+  if (doesHaveValue(opts.configFile)) {
+    configurationFileName = opts.configFile
+  }
+
   if (doesHaveValue(opts.definitionsFileContent)) {
     await fs.writeFile(
-      path.join(cwd, 'cucumber.js'),
+      path.join(cwd, configurationFileName),
       opts.definitionsFileContent
     )
   }
+
   const profileLoader = new ProfileLoader(cwd)
-  return await profileLoader.getArgv(valueOrDefault(opts.profiles, []))
+  return await profileLoader.getArgv(
+    valueOrDefault(opts.profiles, []),
+    opts.configFile
+  )
 }
 
 describe('ProfileLoader', () => {
@@ -150,5 +161,23 @@ describe('ProfileLoader', () => {
         })
       })
     })
+
+    describe('with non-default configuration file', () => {
+      it('returns the argv for the given profile', async function () {
+        // Arrange
+        const definitionsFileContent =
+          'module.exports = {profile3: "--opt3 --opt4"}'
+
+        // Act
+        const result = await testProfileLoader({
+          definitionsFileContent,
+          profiles: ['profile3'],
+          configFile: '.cucumber-rc.js',
+        })
+
+        // Assert
+        expect(result).to.eql(['--opt3', '--opt4'])
+      })
+    })
   })
 })