feat: suggest the closest match for an unknown flag

webpack · Nov 2, 2020 · 1a152f5 · 1a152f5
1 parent e995923
commit 1a152f5
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Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/packages/webpack-cli/lib/bootstrap.js b/packages/webpack-cli/lib/bootstrap.js
@@ -3,6 +3,7 @@ const { core } = require('./utils/cli-flags');
 const logger = require('./utils/logger');
 const { isCommandUsed } = require('./utils/arg-utils');
 const argParser = require('./utils/arg-parser');
+const leven = require('leven');
 
 process.title = 'webpack-cli';
 
@@ -39,6 +40,11 @@ const runCLI = async (cliArgs) => {
         if (parsedArgs.unknownArgs.length > 0) {
             parsedArgs.unknownArgs.forEach(async (unknown) => {
                 logger.error(`Unknown argument: ${unknown}`);
+                const strippedFlag = unknown.substr(2);
+                const { name: suggestion } = core.find((flag) => leven(strippedFlag, flag.name) < 3);
+                if (suggestion) {
+                    logger.raw(`Did you mean --${suggestion}?`);
+                }
             });
 
             process.exit(2);

diff --git a/packages/webpack-cli/package.json b/packages/webpack-cli/package.json
@@ -37,6 +37,7 @@
     "execa": "^4.1.0",
     "import-local": "^3.0.2",
     "interpret": "^2.2.0",
+    "leven": "^3.1.0",
     "rechoir": "^0.7.0",
     "v8-compile-cache": "^2.2.0",
     "webpack-merge": "^4.2.2"