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Hide optional flags when a command has too many options #416

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merged 2 commits into from
Mar 8, 2022
Merged

Hide optional flags when a command has too many options #416

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194f0b8
Hide optional flags when too many options
natecook1000 Mar 3, 2022
3df7139
Remove outdated comment; add test case
natecook1000 Mar 7, 2022
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18 changes: 16 additions & 2 deletions Sources/ArgumentParser/Parsable Properties/Flag.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -209,7 +209,14 @@ extension Flag where Value == Optional<Bool> {
help: ArgumentHelp? = nil
) {
self.init(_parsedValue: .init { key in
.flag(key: key, name: name, default: nil, inversion: inversion, exclusivity: exclusivity, help: help)
.flag(
key: key,
name: name,
default: nil,
required: false,
inversion: inversion,
exclusivity: exclusivity,
help: help)
})
}
}
Expand Down Expand Up @@ -257,7 +264,14 @@ extension Flag where Value == Bool {
help: ArgumentHelp?
) {
self.init(_parsedValue: .init { key in
.flag(key: key, name: name, default: initial, inversion: inversion, exclusivity: exclusivity, help: help)
.flag(
key: key,
name: name,
default: initial,
required: initial == nil,
inversion: inversion,
exclusivity: exclusivity,
help: help)
})
}

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13 changes: 10 additions & 3 deletions Sources/ArgumentParser/Parsing/ArgumentSet.swift
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Expand Up @@ -106,9 +106,16 @@ extension ArgumentSet {
}

/// Creates an argument set for a pair of inverted Boolean flags.
static func flag(key: InputKey, name: NameSpecification, default initialValue: Bool?, inversion: FlagInversion, exclusivity: FlagExclusivity, help: ArgumentHelp?) -> ArgumentSet {
// The flag is required if initialValue is `nil`, otherwise it's optional
let helpOptions: ArgumentDefinition.Help.Options = initialValue != nil ? .isOptional : []
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update comment above?

static func flag(
key: InputKey,
name: NameSpecification,
default initialValue: Bool?,
required: Bool,
inversion: FlagInversion,
exclusivity: FlagExclusivity,
help: ArgumentHelp?) -> ArgumentSet
{
let helpOptions: ArgumentDefinition.Help.Options = required ? [] : .isOptional

let enableHelp = ArgumentDefinition.Help(options: helpOptions, help: help, defaultValue: initialValue.map(String.init), key: key, isComposite: true)
let disableHelp = ArgumentDefinition.Help(options: [.isOptional], help: help, key: key)
Expand Down
10 changes: 10 additions & 0 deletions Tests/ArgumentParserUnitTests/UsageGenerationTests.swift
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Expand Up @@ -175,6 +175,10 @@ extension UsageGenerationTests {
}

struct M: ParsableArguments {
enum Color: String, EnumerableFlag {
case green, blue, yellow
}

@Flag var a: Bool = false
@Flag var b: Bool = false
@Flag var c: Bool = false
Expand All @@ -187,6 +191,12 @@ extension UsageGenerationTests {
@Flag var j: Bool = false
@Flag var k: Bool = false
@Flag var l: Bool = false

@Flag(inversion: .prefixedEnableDisable)
var optionalBool: Bool?

@Flag var optionalColor: Color?

@Option var option: Bool
@Argument var input: String
@Argument var output: String?
Expand Down