tone down global install warning

CHANGELOG.md

@@ -8,6 +8,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Please see [CONTRIBUTING.md](./CONTRIBUTING.md) on how to contribute to Cucumber.
 
 ## [Unreleased]
+### Changed
+- Only show global install warning in debug mode ([#2285](https://github.com/cucumber/cucumber-js/pull/2285))
+
 ### Fixed
 - Export `ISupportCodeLibrary` type on `/api` entry point ([#2284](https://github.com/cucumber/cucumber-js/pull/2284))
 

docs/installation.md

@@ -30,7 +30,7 @@ Unlike many libraries, Cucumber is _stateful_; you call functions to register yo
 
 Some libraries with a command-line interface are designed to be installed globally. Not Cucumber though - for the reasons above, you need to install it as a dependency in your project.
 
-We'll emit a warning if it looks like Cucumber is installed globally.
+We'll emit a warning when in [debug mode](./debugging.md) if it looks like Cucumber is installed globally.
 
 ### Duplicate dependency
 

src/cli/index.ts

@@ -39,7 +39,10 @@ export default class Cli {
   }
 
   async run(): Promise<ICliRunResult> {
-    await validateInstall()
+    const debugEnabled = debug.enabled('cucumber')
+    if (debugEnabled) {
+      await validateInstall()
+    }
     const { options, configuration: argvConfiguration } = ArgvParser.parse(
       this.argv
     )
@@ -59,12 +62,13 @@ export default class Cli {
         success: true,
       }
     }
+
     const environment = {
       cwd: this.cwd,
       stdout: this.stdout,
       stderr: this.stderr,
       env: this.env,
-      debug: debug.enabled('cucumber'),
+      debug: debugEnabled,
     }
     const { useConfiguration: configuration, runConfiguration } =
       await loadConfiguration(

src/cli/install_validator.ts

@@ -6,7 +6,7 @@ export async function validateInstall(): Promise<void> {
     console.warn(
       `
       It looks like you're running Cucumber from a global installation.
-      This won't work - you need to have Cucumber installed as a local dependency in your project.
+      If so, you'll likely see issues - you need to have Cucumber installed as a local dependency in your project.
       See https://github.com/cucumber/cucumber-js/blob/main/docs/installation.md#invalid-installations
       `
     )