feat: adds strictOptions()

docs/api.md

@@ -1518,6 +1518,13 @@ Similar to `.strict()`, except that it only applies to unrecognized commands. A
 user can still provide arbitrary options, but unknown positional commands
 will raise an error.
 
+.strictOptions([enabled=true])
+---------
+
+Similar to `.strict()`, except that it only applies to unrecognized options. A
+user can still provide arbitrary positional commands, but unknown options
+will raise an error.
+
 <a name="string"></a>.string(key)
 ------------
 

lib/validation.ts

@@ -114,7 +114,7 @@ export function validation (yargs: YargsInstance, usage: UsageInstance, y18n: Y1
   }
 
   // check for unknown arguments (strict-mode).
-  self.unknownArguments = function unknownArguments (argv, aliases, positionalMap, isDefaultCommand) {
+  self.unknownArguments = function unknownArguments (argv, aliases, positionalMap, isDefaultCommand, checkPositionals = true) {
     const commandKeys = yargs.getCommandInstance().getCommands()
     const unknown: string[] = []
     const currentContext = yargs.getContext()
@@ -129,7 +129,7 @@ export function validation (yargs: YargsInstance, usage: UsageInstance, y18n: Y1
       }
     })
 
-    if ((currentContext.commands.length > 0) || (commandKeys.length > 0) || isDefaultCommand) {
+    if (checkPositionals && ((currentContext.commands.length > 0) || (commandKeys.length > 0) || isDefaultCommand)) {
       argv._.slice(currentContext.commands.length).forEach((key) => {
         if (commandKeys.indexOf('' + key) === -1) {
           unknown.push('' + key)
@@ -428,7 +428,8 @@ export interface ValidationInstance {
     argv: Arguments,
     aliases: DetailedArguments['aliases'],
     positionalMap: Dictionary,
-    isDefaultCommand: boolean
+    isDefaultCommand: boolean,
+    checkPositionals?: boolean,
   ): void
   unknownCommands(argv: Arguments): boolean
 }

lib/yargs-factory.ts

@@ -167,6 +167,7 @@ function Yargs (processArgs: string | string[] = [], cwd = shim.process.cwd(), p
       groups,
       strict,
       strictCommands,
+      strictOptions,
       completionCommand,
       output,
       exitError,
@@ -195,6 +196,7 @@ function Yargs (processArgs: string | string[] = [], cwd = shim.process.cwd(), p
       parsed: self.parsed,
       strict,
       strictCommands,
+      strictOptions,
       completionCommand,
       parseFn,
       parseContext,
@@ -950,6 +952,14 @@ function Yargs (processArgs: string | string[] = [], cwd = shim.process.cwd(), p
   }
   self.getStrictCommands = () => strictCommands
 
+  let strictOptions = false
+  self.strictOptions = function (enabled) {
+    argsert('[boolean]', [enabled], arguments.length)
+    strictOptions = enabled !== false
+    return self
+  }
+  self.getStrictOptions = () => strictOptions
+
   let parserConfig: Configuration = {}
   self.parserConfiguration = function parserConfiguration (config) {
     argsert('<object>', [config], arguments.length)
@@ -1379,6 +1389,8 @@ function Yargs (processArgs: string | string[] = [], cwd = shim.process.cwd(), p
     }
     if (strict && !failedStrictCommands) {
       validation.unknownArguments(argv, aliases, positionalMap, isDefaultCommand)
+    } else if (strictOptions) {
+      validation.unknownArguments(argv, aliases, {}, false, false)
     }
     validation.customChecks(argv, aliases)
     validation.limitedChoices(argv)
@@ -1524,6 +1536,7 @@ export interface YargsInstance {
   getParserConfiguration (): Configuration
   getStrict (): boolean
   getStrictCommands (): boolean
+  getStrictOptions (): boolean
   getUsageInstance (): UsageInstance
   getValidationInstance (): ValidationInstance
   global (keys: string | string[], global?: boolean): YargsInstance
@@ -1578,6 +1591,7 @@ export interface YargsInstance {
   skipValidation (keys: string | string[]): YargsInstance
   strict (enable?: boolean): YargsInstance
   strictCommands (enable?: boolean): YargsInstance
+  strictOptions (enable?: boolean): YargsInstance
   string (key: string | string []): YargsInstance
   terminalWidth (): number | null
   updateStrings (obj: Dictionary<string>): YargsInstance
@@ -1711,6 +1725,7 @@ interface FrozenYargsInstance {
   groups: Dictionary<string[]>
   strict: boolean
   strictCommands: boolean
+  strictOptions: boolean
   completionCommand: string | null
   output: string
   exitError: YError | string | undefined | null

package.json

@@ -28,7 +28,7 @@
     "index.cjs",
     "helpers.mjs",
     "index.mjs",
-    "yargs.mjs",
+    "yargs.cjs",
     "build",
     "locales",
     "LICENSE",

test/validation.cjs

@@ -999,24 +999,6 @@ describe('validation tests', () => {
         .parse()
     })
 
-    // TODO(bcoe): consider implementing this behvaior in the next major version of yargs:
-    //
-    // // for the special case of yargs.demandCommand() and yargs.demandCommand(1), if
-    // // yargs has been configured with commands, we automatically enable strictCommands.
-    // if (commandKeys.length && demandedCommands._ && demandedCommands._.min === 1 && demandedCommands._.max === Infinity) {
-    //   yargs.strictCommands()
-    // }
-    // it('enables strict commands if commands used in conjunction with demandCommand', (done) => {
-    //   yargs('blerg -a 10')
-    //     .demandCommand()
-    //     .command('foo', 'foo command')
-    //     .fail((msg) => {
-    //       msg.should.equal('Unknown command: blerg')
-    //       return done()
-    //     })
-    //     .parse()
-    // })
-
     it('does not apply implicit strictCommands to inner commands', () => {
       const parse = yargs('foo blarg --cool beans')
         .demandCommand()
@@ -1040,4 +1022,52 @@ describe('validation tests', () => {
         .parse()
     })
   })
+
+  describe('strictOptions', () => {
+    it('succeeds if option is known and command is unknown', (done) => {
+      yargs()
+        .command('foo', 'foo command')
+        .option('a', {
+          describe: 'a is for option'
+        })
+        .strictOptions()
+        .parse('bar -a 10', (err, argv) => {
+          expect(err).to.equal(null)
+          argv.a.should.equal(10)
+          return done()
+        })
+    })
+
+    it('fails if option is unknown', (done) => {
+      yargs()
+        .strictOptions()
+        .parse('bar -a 10', (err, argv) => {
+          expect(err).to.match(/Unknown argument: a/)
+          argv.a.should.equal(10)
+          return done()
+        })
+    })
+
+    it('applies strict options when commands are invoked', () => {
+      yargs()
+        .strictOptions()
+        .parse('foo --cool --awesome', (err) => {
+          expect(err).to.match(/Unknown arguments: cool, awesome/)
+        })
+    })
+
+    it('allows strict options to be turned off', () => {
+      const y = yargs()
+        .strictOptions()
+        .command('foo', 'foo command', (yargs) => {
+          yargs.strictOptions(false)
+        })
+      y.parse('foo --cool --awesome', (err) => {
+        expect(err).to.equal(null)
+      })
+      y.parse('--cool --awesome', (err) => {
+        expect(err).to.match(/Unknown arguments: cool, awesome/)
+      })
+    })
+  })
 })