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CHANGELOG

Unreleased

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1.1.3 - 2022-06-23

Additions

  • ArgumentParser now includes a SwiftPM plugin for generating man pages. Explore the functionality and configuration by running swift package plugin experimental-generate-manual --help from your package root. (#332)

Fixes

  • Hidden subcommands are now excluded from completion scripts. (#443)
  • When an invalid value is provided for a CaseIterable type, the error message now includes a list of valid inputs. (#445)
  • There's now a diagnostic when an AsyncParsableCommand is incorrectly placed under a non-async root command. (#436)

The 1.1.3 release includes contributions from keith, KeithBird, konomae, LucianoPAlmeida, and rauhul. Thank you!

1.1.2 - 2022-04-11

Changes

  • CMake builds now always statically links ArgumentParserToolInfo. (#424)

Fixes

  • When a user provides an array-based option's key (e.g. --key) without any values, the error message now correctly describes the problem. (#435)

The 1.1.2 release includes contributions from compnerd and KeithBird. Thank you!

1.1.1 - 2022-03-16

Fixes

  • Moves the platform requirement from the package level down to the new types and protocols with async members. This was a source-breaking change in 1.1.0. (#427)
  • Fixed issues in the CMake build configuration.

1.1.0 - 2022-03-14

Additions

  • A command's run() method now supports async/await when the command conforms to AsyncParsableCommand. (#404)
  • New API for distinguishing between public, hidden, and private arguments and option groups, and a new extended help screen accessible via --help-hidden. (#366, #390, and #405 through #413)
  • You can now override the autogenerated usage string when configuring a command. (#400)

Changes

  • ArgumentParser now requires Swift 5.5.

Fixes

  • The auto-generated usage string now correctly hides all optional parameters when over the length limit. (#416)
  • One @Option initializer now has its parameters in the correct order; the incorrect initializer is deprecated. (#391)
  • Help flags are now correctly captured in .unconditionalRemaining argument arrays.
  • Documentation fixes and improvements.

The 1.1.0 release includes contributions from keith, MartinP7r, McNight, natecook1000, rauhul, and zkiraly. Thank you!

1.0.3 - 2022-01-31

Changes

  • When a user provides an incorrect value for an option, an ArgumentParser-based program now includes the valid values when possible.

    $ example --format png
Error: The value 'png' is invalid for '--format <format>'.
Please provide one of 'text', 'json' or 'csv'.

Fixes

  • Resolves an issue with zsh custom completions for command names that include a dash.
  • Improves the generated completions scripts for fish.
  • Resolves issues that prevented building ArgumentParser for WebAssembly using SwiftWasm toolchains.
  • Improved window size handling on Windows.
  • Fixed a crash when using --experimental-dump-help with commands that provide non-parsed values.
  • Fixes an issue where subcommands that declare array arguments with the .unconditionalRemaining parsing strategy unexpectedly miss arguments, extending the change in #333 to subcommands. (#397)
  • Corrects the order of an @Option initializer's parameters, deprecating the old version. (#391)
  • Expanded and corrected documentation.

The 1.0.3 release includes contributions from atierian, CraigSiemens, dduan, floam, KS1019, McNight, mdznr, natecook1000, rauhul, and yonihemi. Thank you!

1.0.2 - 2021-11-09

Fixes

  • Addresses an issue when building tests under Mac Catalyst.

The 1.0.2 release includes a contribution from jakepetroules. Thank you!

1.0.1 - 2021-09-14

Fixes

  • Addresses an issue when compiling under Mac Catalyst.

The 1.0.1 release includes a contribution from imxieyi. Thank you!

1.0.0 - 2021-09-10

The 1.0 release marks an important milestone — ArgumentParser is now source stable!

Changes

  • ArgumentParser now provides a DocC documentation catalog, so you can view rendered articles and symbol documentation directly within Xcode.

Fixes

  • Parsing works as expected for options with single-dash names that are declared using the .upToNextOption parsing strategy.

0.5.0 - 2021-09-02

Additions

  • When a user doesn't provide a required argument, the error message now includes that argument's help text. (#324)
  • Command-line tools built with ArgumentParser now include an experimental flag to dump command/argument/help information as JSON: --experimental-dump-help. (#310)

Changes

  • All public enumerations are now structs with static properties, to make compatibility with future additions simpler.

Fixes

  • Array properties defined as @Option with the .upToNextOption parsing strategy now include all provided values. (#304) In the example below, all four values are now included in the resulting array, where only the last two were included in previous releases:

    struct Example: ParsableCommand {
    @Option(parsing: .upToNextOption)
    var option: [String]
}
    $ example --option one two --option three four

  • When a command defines an array property as an @Argument with the .unconditionalRemaining parsing strategy, option and flag parsing now stops at the first positional argument or unrecognized flag. (#333)

  • Completion scripts correctly use customized help flags. (#308)

  • Fixes errors with bash custom completion arguments and the executable path. (#320, #323)

  • Fixes the behavior when a user specifies both the help subcommand and a help flag. (#309)

  • A variety of internal improvements. (#315, #316, #321, #341)

The 0.5.0 release includes contributions from atierian, compnerd, dirtyhabits97, Frizlab, KS1019, natecook1000, and rauhul. Thank you!

0.4.4 - 2021-07-30

Fixes

  • Includes a workaround for a runtime crash with certain OptionGroup configurations when a command is compiled in release mode.

0.4.3 - 2021-04-28

Additions

  • Experimental API for hiding @OptionGroup-declared properties from the help screen.

The 0.4.3 release includes a contribution from miggs597. Thank you!

0.4.2 - 2021-04-21

Fixes

  • Both parts of a flag with an inversion are now hidden when specified.
  • Better support for building on OpenBSD.
  • Optional unparsed values are now always properly decoded. (#290)
  • Help information from super-commands is no longer unnecessarily injected into subcommand help screens.

The 0.4.2 release includes contributions from 3405691582, kylemacomber, miggs597, natecook1000, and werm098. Thank you!

0.4.1 - 2021-03-08

Additions

  • When a user provides an invalid value as an argument or option, the error message now includes the help text for that argument.

Fixes

  • Zsh completion scripts for commands that include a hyphen no longer cause errors.
  • Optional unparsed values are now decoded correctly in ParsableArguments types.

The 0.4.1 release includes contributions from adellibovi and natecook1000. Thank you!

0.4.0 - 2021-03-04

Additions

  • Short options can now support "joined option" syntax, which lets users specify a value appended immediately after the option's short name. For example, in addition to calling this example command with -D debug and -D=debug, users can now write -Ddebug for the same parsed value. (#240)

    @main
struct Example: ParsableCommand {
    @Option(name: .customShort("D", allowingJoined: true))
    var debugValue: String
  
    func run() {
        print(debugValue)
    }
}

Changes

  • The CommandConfiguration.helpNames property is now optional, to allow the overridden help flags of parent commands to flow down to their children. Most existing code should not be affected, but if you've customized a command's help flags you may see different behavior. (#251)

  • The errorCode property is no longer used as a command's exit code when CustomNSError types are thrown. (#276)

    Migration: Instead of throwing a CustomNSError type, print your error manually and throw an ExitCode error to customize your command's exit code.

Removals

  • Old, deprecated property wrapper initializers have been removed.

Fixes

  • Validation errors now show the correct help flags when help flags have been customized.
  • Options, flags, and arguments that are marked as hidden from the help screen are also suppressed from completion scripts.
  • Non-parsed variable properties are now allowed in parsable types.
  • Error messages produced when NSError types are thrown have been improved.
  • The usage line for commands with a large number of options includes more detail about required flags and positional arguments.
  • Support for CMake builds on Apple Silicon is improved.

The 0.4.0 release includes contributions from CodaFi, lorentey, natecook1000, schlagelk, and Zoha131. Thank you!

0.3.2 - 2021-01-15

Fixes

  • Changes made to a command's properties in its validate method are now persisted.
  • The exit code defined by error types that conform to CustomNSError are now honored.
  • Improved error message when declaring a command type with an unadorned mutable property. (See #256 for more.)
  • Migrated from CRT to MSVCRT for Windows platforms.
  • Fixes and improvements for building with CMake for Windows and Apple Silicon.
  • Documentation improvements.

The 0.3.2 release includes contributions from compnerd, CypherPoet, damuellen, drewmccormack, elliottwilliams, gmittert, MaxDesiatov, natecook1000, pegasuze, and SergeyPetrachkov. Thank you!

0.3.1 - 2020-09-02

Fixes

  • An option or flag can now declare a name with both single- and double- dash prefixes, such as -my-flag and --my-flag. Specify both names in the name parameter when declaring your property:

    @Flag(name: [.long, .customLong("my-flag", withSingleDash: true)])
var myFlag = false

  • Parsing performance improvements.

0.3.0 - 2020-08-15

Additions

  • Shell completions scripts are now available for Fish.

Changes

  • Array properties without a default value are now treated as required for the user of a command-line tool. In previous versions of the library, these properties defaulted to an empty array; a deprecation was introduced for this behavior in version 0.2.0.

    Migration: Specify an empty array as the default value for properties that should not require user input:

    // old
@Option var names: [String]
// new
@Option var names: [String] = []

The 0.3.0 release includes contributions from dduan, MPLew-is, natecook1000, and thomasvl. Thank you!

0.2.2 - 2020-08-05

Fixes

  • Zsh completion scripts have improved documentation and better support multi-word completion strings, escaped characters, non-standard executable locations, and empty help strings.

The 0.2.2 release includes contributions from interstateone, miguelangel-dev, natecook1000, stuartcarnie, and Wevah. Thank you!

0.2.1 - 2020-07-30

Additions

  • You can now generate Bash and Zsh shell completion scripts for commands, either by using the --generate-completion-script flag when running a command, or by calling the static completionScript(for:) method on a root ParsableCommand type. See the guide to completion scripts for information on customizing and installing the completion script for your command.

Fixes

  • Property wrappers without parameters can now be written without parentheses — e.g. @Flag var verbose = false.
  • When displaying default values for array properties, the help screen now correctly uses the element type's ExpressibleByArgument conformance to generate the description.
  • Running a project that defines a command as its own subcommand now fails with a useful error message.

The 0.2.1 release includes contributions from natecook1000, NicFontana, schlagelk, sharplet, and Wevah. Thank you!

0.2.0 - 2020-06-23

Additions

  • You can now specify default values for array properties of parsable types. The default values are overridden if the user provides at least one value as part of the command-line arguments.

Changes

  • This release of swift-argument-parser requires Swift 5.2.

  • Default values for all properties are now written using default initialization syntax, including some values that were previously implicit, such as empty arrays and false for Boolean flags.

    Migration: Specify default values using typical Swift default value syntax to remove the deprecation warnings:

    // old
@Flag var verbose: Bool
// new
@Flag var verbose = false

    Important: There is a semantic change for flags with inversions that do not have a default value. In previous releases, these flags had a default value of false; starting in 0.2.0, these flags will have no default, and will therefore be required by the user. Specify a default value of false to retain the old behavior.

Fixes

  • Options with multiple names now consistently show the first-declared name in usage and help screens.
  • Default subcommands are indicated in the help screen.
  • User errors with options are now shown before positional argument errors, eliminating some false negative reports.
  • CMake compatibility fixes.

The 0.2.0 release includes contributions from artemnovichkov, compnerd, ibrahimoktay, john-mueller, MPLew-is, natecook1000, and owenv. Thank you!

0.1.0 - 2020-06-03

Additions

  • Error messages and help screens now include information about how to request more help.
  • CMake builds now support installation.

Changes

  • The static func main() method on ParsableCommand no longer returns Never. This allows ParsableCommand types to be designated as the entry point for a Swift executable by using the @main attribute.

    Migration: For most uses, this change is source compatible. If you have used main() where a () -> Never function is explicitly required, you'll need to change your usage or capture the method in another function.

  • Optional no longer conforms to ExpressibleByArgument, to avoid some property declarations that don't make sense.

    Migration: This is source-compatible for all property declarations, with deprecations for optional properties that define an explicit default. If you're using optional values where an ExpressibleByArgument type is expected, such as a generic function, you will need to change your usage or provide an explicit override.

  • ParsableCommand's run() method requirement is now a mutating method, allowing mutations to a command's properties, such as sorting an array of arguments, without additional copying.

    Migration: No changes are required for commands that are executed through the main() method. If you manually parse a command and then call its run() method, you may need to change the command from a constant to a variable.

Removals

  • The @Flag initializers that were deprecated in version 0.0.6 are now marked as unavailable.

Fixes

  • @Option properties of an optional type that use a transform closure now correctly indicate their optionality in the usage string.
  • Correct wrapping and indentation are maintained for abstracts and discussions with short lines.
  • Empty abstracts no longer add extra blank lines to the help screen.
  • Help requests are still honored even when a parsed command fails validation.
  • The -- terminator isn't consumed when parsing a command, so that it can be parsed as a value when a subcommand includes an .unconditionalRemaining argument array.
  • CMake builds work correctly again.

The 0.1.0 release includes contributions from aleksey-mashanov, BradLarson, compnerd, erica, ibrahimoktay, and natecook1000. Thank you!

0.0.6 - 2020-05-14

Additions

  • Command definition validation now checks for name collisions between options and flags.
  • ValidationError.message is now publicly accessible.
  • Added an EnumerableFlag protocol for CaseIterable types that are used to provide the names for flags. When declaring conformance to EnumerableFlag, you can override the name specification and help text for individual flags. See #65 for more detail.
  • When a command that requires arguments is called with no arguments at all, the error message includes the full help text instead of the short usage string. This is intended to provide a better experience for first-time users.
  • Added a helpMessage() method for generating the help text for a command or subcommand.

Deprecations

  • @Flag properties that use CaseIterable/String types as their values are deprecated, and the related @Flag initializers will be removed in a future version.

    Migration: Add EnumerableFlag conformance to the type of these kinds of @Flag properties.

Fixes

  • Errors thrown while parsing in a transform closure are printed correclty instead of a general Invalid state error.
  • Improvements to the guides and in the error message when attempting to access a value from an argument/option/flag definition.
  • Fixed issues in the CMake and Windows build configurations.
  • You can now use an = to join a value with an option's short name when calling a command. This previously only worked for long names.

The 0.0.6 release includes contributions from compnerd, john-mueller, natecook1000, owenv, rjstelling, and toddthomas. Thank you!

0.0.5 - 2020-04-15

Additions

  • You can now specify a version string in a ParsableCommand's configuration. The generated tool will then automatically respond to a --version flag.
  • Command definitions are now validated at runtime in debug mode, to check issues that can't be detected during compilation.

Fixes

  • Deprecation warnings during compilation on Linux have been removed.
  • The validate() method is now called on each command in the matched command stack, instead of only the last command in the stack.

The 0.0.5 release includes contributions from kennyyork, natecook1000, sgl0v, and YuAo. Thank you!

0.0.4 - 2020-03-23

Fixes

  • Removed usage of 5.2-only syntax.

0.0.3 - 2020-03-22

Additions

  • You can specify the .unconditionalRemaining parsing strategy for arrays of positional arguments to accept dash-prefixed input, like example --one two -three.
  • You can now provide a default value for a positional argument.
  • You can now customize the display of default values in the extended help for an ExpressibleByArgument type.
  • You can call the static exitCode(for:) method on any command to retrieve the exit code for a given error.

Fixes

  • Supporting targets are now prefixed to prevent conflicts with other libraries.
  • The extension providing init?(argument:) to RawRepresentable types is now properly constrained.
  • The parser no longer treats passing the same exclusive flag more than once as an error.
  • ParsableArguments types that are declared as @OptionGroup properties on commands can now also be declared on subcommands. Previosuly, the parent command's declaration would prevent subcommands from seeing the user-supplied arguments.
  • Default values are rendered correctly for properties with Optional types.
  • The output of help requests is now printed during the "exit" phase of execution, instead of during the "run" phase.
  • Usage strings now correctly show that optional positional arguments aren't required.
  • Extended help now omits extra line breaks when displaying arguments or commands with long names that don't provide help text.

The 0.0.3 release includes contributions from compnerd, elliottwilliams, glessard, griffin-stewie, iainsmith, Lantua, miguelangel-dev, natecook1000, sjavora, and YuAo. Thank you!

0.0.2 - 2020-03-06

Additions

  • The EX_USAGE exit code is now used for validation errors.
  • The parser provides near-miss suggestions when a user provides an unknown option.
  • ArgumentParser now builds on Windows.
  • You can throw an ExitCode error to exit without printing any output.
  • You can now create optional Boolean flags with inversions that default to nil: 
    @Flag(inversion: .prefixedNo) var takeMyShot: Bool?
  • You can now specify exclusivity for case-iterable flags and for Boolean flags with inversions.

Fixes

  • Cleaned up a wide variety of documentation typos and shortcomings.
  • Improved different kinds of error messages:
    • Duplicate exclusive flags now show the duplicated arguments.
    • Subcommand validation errors print the correct usage string.
  • In the help screen:
    • Removed the extra space before the default value for arguments without descriptions.
    • Removed the default value note when the default value is an empty string.
    • Default values are now shown for Boolean options.
    • Case-iterable flags are now grouped correctly.
    • Case-iterable flags with default values now show the default value.
    • Arguments from parent commands that are included via @OptionGroup in subcommands are no longer duplicated.
  • Case-iterable flags created with the .chooseFirst exclusivity parameter now correctly ignore additional flags.

The 0.0.2 release includes contributions from AliSoftware, buttaface, compnerd, dduan, glessard, griffin-stewie, IngmarStein, jonathanpenn, klaaspieter, natecook1000, Sajjon, sjavora, Wildchild9, and zntfdr. Thank you!

0.0.1 - 2020-02-27

  • ArgumentParser initial release.

This changelog's format is based on Keep a Changelog.