fix(suggestions): clarify Unknown command output

lib/cli.js

@@ -66,14 +66,12 @@ module.exports = (process) => {
         npm.log.level = 'silent'
         if (cmd) {
           const didYouMean = require('./utils/did-you-mean.js')
-          console.error(npm.localPrefix)
           const suggestions = await didYouMean(npm, npm.localPrefix, cmd)
-          npm.output(suggestions)
+          npm.output(`Unknown command: "${cmd}"${suggestions}`)
         } else
           npm.output(npm.usage)
         process.exitCode = 1
       } catch (err) {
-        console.error(err)
         errorHandler(err)
       }
     }

lib/run-script.js

@@ -92,7 +92,7 @@ class RunScript extends BaseCommand {
         return
 
       const suggestions = await didYouMean(this.npm, path, event)
-      throw new Error(suggestions)
+      throw new Error(`Missing script: "${event}"${suggestions}`)
     }
 
     // positional args only added to the main event, not pre/post
@@ -228,7 +228,7 @@ class RunScript extends BaseCommand {
         log.error(`  in workspace: ${pkg._id || pkg.name}`)
         log.error(`  at location: ${workspacePath}`)
 
-        const scriptMissing = err.message.startsWith('Unknown command')
+        const scriptMissing = err.message.startsWith('Missing script')
 
         // avoids exiting with error code in case there's scripts missing
         // in some workspaces since other scripts might have succeeded

lib/utils/did-you-mean.js

@@ -23,10 +23,11 @@ const didYouMean = async (npm, path, scmd) => {
 
   const best = [...bestCmd, ...bestRun, ...bestBin]
 
-  const suggestion = best.length === 0 ? ''
-    : best.length === 1 ? `\n\nDid you mean this?\n${best[0]}`
+  if (best.length === 0)
+    return ''
+
+  const suggestion = best.length === 1 ? `\n\nDid you mean this?\n${best[0]}`
     : `\n\nDid you mean one of these?\n${best.slice(0, 3).join('\n')}`
-  const result = `Unknown command: "${scmd}"${suggestion}`
-  return result
+  return suggestion
 }
 module.exports = didYouMean

test/lib/cli.js

@@ -46,7 +46,7 @@ const npmlogMock = {
 const requireInject = require('require-inject')
 const cli = requireInject.installGlobally('../../lib/cli.js', {
   '../../lib/npm.js': npmock,
-  '../../lib/utils/did-you-mean.js': () => 'test did you mean',
+  '../../lib/utils/did-you-mean.js': () => '\ntest did you mean',
   '../../lib/utils/unsupported.js': unsupportedMock,
   '../../lib/utils/error-handler.js': errorHandlerMock,
   npmlog: npmlogMock,
@@ -160,7 +160,7 @@ t.test('print usage if non-command param provided', t => {
   npmock.argv = ['asdf']
   npmock.output = (msg) => {
     if (msg) {
-      t.match(msg, 'test did you mean', 'outputs did you mean')
+      t.match(msg, 'Unknown command: "asdf"\ntest did you mean', 'outputs did you mean')
       t.end()
     }
   }

test/lib/run-script.js

@@ -290,15 +290,15 @@ t.test('try to run missing script', t => {
   t.test('no suggestions', t => {
     runScript.exec(['notevenclose'], er => {
       t.match(er, {
-        message: 'Unknown command: "notevenclose"',
+        message: 'Missing script: "notevenclose"',
       })
       t.end()
     })
   })
   t.test('script suggestions', t => {
     runScript.exec(['helo'], er => {
       t.match(er, {
-        message: 'Unknown command: "helo"',
+        message: 'Missing script: "helo"',
       })
       t.match(er, {
         message: 'npm run hello',
@@ -309,7 +309,7 @@ t.test('try to run missing script', t => {
   t.test('bin suggestions', t => {
     runScript.exec(['goodneght'], er => {
       t.match(er, {
-        message: 'Unknown command: "goodneght"',
+        message: 'Missing script: "goodneght"',
       })
       t.match(er, {
         message: 'npm exec goodnight',
@@ -896,27 +896,27 @@ t.test('workspaces', t => {
       t.match(RUN_SCRIPTS, [])
       t.strictSame(LOG.map(cleanOutput), [
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/a',
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/b',
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/c',
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/d',
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: e',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/e',
         'Lifecycle script `missing-script` failed with error:',
-        'Error: Unknown command: "missing-script"',
+        'Error: Missing script: "missing-script"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/noscripts',
       ], 'should log error msgs for each workspace script')
@@ -937,11 +937,11 @@ t.test('workspaces', t => {
       t.match(RUN_SCRIPTS, [])
       t.strictSame(LOG.map(cleanOutput), [
         'Lifecycle script `test` failed with error:',
-        'Error: Unknown command: "test"',
+        'Error: Missing script: "test"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/a',
         'Lifecycle script `test` failed with error:',
-        'Error: Unknown command: "test"',
+        'Error: Missing script: "test"',
         '  in workspace: [email protected]',
         '  at location: {CWD}/test/lib/run-script-workspaces/packages/b',
       ], 'should log error msgs for each workspace script')

test/lib/utils/did-you-mean.js

@@ -8,23 +8,20 @@ t.test('did-you-mean', t => {
     t.notOk(err)
     t.test('nistall', async t => {
       const result = await dym(npm, npm.localPrefix, 'nistall')
-      t.match(result, 'Unknown command')
       t.match(result, 'npm install')
     })
     t.test('sttest', async t => {
       const result = await dym(npm, npm.localPrefix, 'sttest')
-      t.match(result, 'Unknown command')
       t.match(result, 'npm test')
       t.match(result, 'npm run posttest')
     })
     t.test('npz', async t => {
       const result = await dym(npm, npm.localPrefix, 'npxx')
-      t.match(result, 'Unknown command')
       t.match(result, 'npm exec npx')
     })
     t.test('qwuijbo', async t => {
       const result = await dym(npm, npm.localPrefix, 'qwuijbo')
-      t.match(result, 'Unknown command')
+      t.match(result, '')
     })
     t.end()
   })
@@ -38,6 +35,5 @@ t.test('missing bin and script properties', async t => {
   })
 
   const result = await dym(npm, path, 'nistall')
-  t.match(result, 'Unknown command')
   t.match(result, 'npm install')
 })