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meow v4.0.0 Release Notes

Release Date: 2017-11-26 // over 6 years ago

  • 🍱 Meow 4 is finally out ✨

    Highlights

    • Requires Node.js 4 or higher.
    • 🔄 Changed how minimist options are specified. (See more below) 43401c3 554119b
    • 0️⃣ Disabled type inference by default. It can lead to some surprising behavior. Can be enabled again with the inferType option. 1662881
    • ✂ Removed support for using an array in the help option. Just use a template literal. c80321d
    • ✂ Removed support for the pkg option accepting a string. 2d4d890
    • ✂ Removed support for setting the help and version options to false. Instead, use the new autoHelp and autoVersion options. 59dda7a
    • 👉 Uses exit code 2 when manually calling cli.showHelp() now. 6a32bbc

    v3.7.0...v4.0.0

    🔄 Changed how minimist options are specified

    In Meow v3 you specified minimist options top-level just like documented in the minimist readme. Now you specify them in a flags option, grouped by flag name instead of option type.

    Before

    const cli = meow( ` Help text`, { boolean: ['unicorn'], string: ['fooBar'], alias: { u: 'unicorn' }, default: { foobar: 'foo' } } });

    After

    const cli = meow( ` Help text`, flags: { unicorn: { type: 'boolean', alias: 'u' }, fooBar: { type: 'string', default: 'foo' } } });

    📜 I would strongly recommend specifying the type property whenever possible to reduce CLI argument parsing ambiguity.