Support for visionOS about swiftgen

[Liquidsoul]

While we see to work on this stencil issue, note that you can use custom ones. Use the existing ones as a starting point.

[lucaArchidiacono]

Might be already solved based on @Liquidsoul 's comment.

But just want to leave a draft, for those who want to quickly have a copy-paste solution:

// swiftlint:disable all
// Generated using SwiftGen — https://github.com/SwiftGen/SwiftGen

{% if catalogs %}
{% macro hasValuesBlock assets filter %}
  {%- for asset in assets -%}
    {%- if asset.type == filter -%}
      1
    {%- elif asset.items -%}
      {% call hasValuesBlock asset.items filter %}
    {%- endif -%}
  {%- endfor -%}
{% endmacro %}
{% set enumName %}{{param.enumName|default:"Asset"}}{% endset %}
{% set arResourceGroupType %}{{param.arResourceGroupTypeName|default:"ARResourceGroupAsset"}}{% endset %}
{% set colorType %}{{param.colorTypeName|default:"ColorAsset"}}{% endset %}
{% set dataType %}{{param.dataTypeName|default:"DataAsset"}}{% endset %}
{% set imageType %}{{param.imageTypeName|default:"ImageAsset"}}{% endset %}
{% set symbolType %}{{param.symbolTypeName|default:"SymbolAsset"}}{% endset %}
{% set forceNamespaces %}{{param.forceProvidesNamespaces|default:"false"}}{% endset %}
{% set accessModifier %}{% if param.publicAccess %}public{% else %}internal{% endif %}{% endset %}
{% set hasARResourceGroup %}{% for catalog in catalogs %}{% call hasValuesBlock catalog.assets "arresourcegroup" %}{% endfor %}{% endset %}
{% set hasColor %}{% for catalog in catalogs %}{% call hasValuesBlock catalog.assets "color" %}{% endfor %}{% endset %}
{% set hasData %}{% for catalog in catalogs %}{% call hasValuesBlock catalog.assets "data" %}{% endfor %}{% endset %}
{% set hasImage %}{% for catalog in catalogs %}{% call hasValuesBlock catalog.assets "image" %}{% endfor %}{% endset %}
{% set hasSymbol %}{% for catalog in catalogs %}{% call hasValuesBlock catalog.assets "symbol" %}{% endfor %}{% endset %}
#if os(macOS)
  import AppKit
#elseif os(iOS) || os(visionOS)
{% if hasARResourceGroup %}
  import ARKit
{% endif %}
  import UIKit
#elseif os(tvOS) || os(watchOS)
  import UIKit
#endif
#if canImport(SwiftUI)
  import SwiftUI
#endif

// Deprecated typealiases
{% if hasColor %}
@available(*, deprecated, renamed: "{{colorType}}.Color", message: "This typealias will be removed in SwiftGen 7.0")
{{accessModifier}} typealias {{param.colorAliasName|default:"AssetColorTypeAlias"}} = {{colorType}}.Color
{% endif %}
{% if hasImage %}
@available(*, deprecated, renamed: "{{imageType}}.Image", message: "This typealias will be removed in SwiftGen 7.0")
{{accessModifier}} typealias {{param.imageAliasName|default:"AssetImageTypeAlias"}} = {{imageType}}.Image
{% endif %}

// swiftlint:disable superfluous_disable_command file_length implicit_return

// MARK: - Asset Catalogs

{% macro enumBlock assets %}
  {% call casesBlock assets %}
  {% if param.allValues %}

  // swiftlint:disable trailing_comma
  {% set hasItems %}{% call hasValuesBlock assets "arresourcegroup" %}{% endset %}
  {% if hasItems %}
  @available(*, deprecated, message: "All values properties are now deprecated")
  {{accessModifier}} static let allResourceGroups: [{{arResourceGroupType}}] = [
    {% filter indent:2," ",true %}{% call allValuesBlock assets "arresourcegroup" "" %}{% endfilter %}
  ]
  {% endif %}
  {% set hasItems %}{% call hasValuesBlock assets "color" %}{% endset %}
  {% if hasItems %}
  @available(*, deprecated, message: "All values properties are now deprecated")
  {{accessModifier}} static let allColors: [{{colorType}}] = [
    {% filter indent:2," ",true %}{% call allValuesBlock assets "color" "" %}{% endfilter %}
  ]
  {% endif %}
  {% set hasItems %}{% call hasValuesBlock assets "data" %}{% endset %}
  {% if hasItems %}
  @available(*, deprecated, message: "All values properties are now deprecated")
  {{accessModifier}} static let allDataAssets: [{{dataType}}] = [
    {% filter indent:2," ",true %}{% call allValuesBlock assets "data" "" %}{% endfilter %}
  ]
  {% endif %}
  {% set hasItems %}{% call hasValuesBlock assets "image" %}{% endset %}
  {% if hasItems %}
  @available(*, deprecated, message: "All values properties are now deprecated")
  {{accessModifier}} static let allImages: [{{imageType}}] = [
    {% filter indent:2," ",true %}{% call allValuesBlock assets "image" "" %}{% endfilter %}
  ]
  {% endif %}
  {% set hasItems %}{% call hasValuesBlock assets "symbol" %}{% endset %}
  {% if hasItems %}
  @available(*, deprecated, message: "All values properties are now deprecated")
  {{accessModifier}} static let allSymbols: [{{symbolType}}] = [
    {% filter indent:2," ",true %}{% call allValuesBlock assets "symbol" "" %}{% endfilter %}
  ]
  {% endif %}
  // swiftlint:enable trailing_comma
  {% endif %}
{% endmacro %}
{% macro casesBlock assets %}
  {% for asset in assets %}
  {% if asset.type == "arresourcegroup" %}
  {{accessModifier}} static let {{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = {{arResourceGroupType}}(name: "{{asset.value}}")
  {% elif asset.type == "color" %}
  {{accessModifier}} static let {{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = {{colorType}}(name: "{{asset.value}}")
  {% elif asset.type == "data" %}
  {{accessModifier}} static let {{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = {{dataType}}(name: "{{asset.value}}")
  {% elif asset.type == "image" %}
  {{accessModifier}} static let {{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = {{imageType}}(name: "{{asset.value}}")
  {% elif asset.type == "symbol" %}
  {{accessModifier}} static let {{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = {{symbolType}}(name: "{{asset.value}}")
  {% elif asset.items and ( forceNamespaces == "true" or asset.isNamespaced == "true" ) %}
  {{accessModifier}} enum {{asset.name|swiftIdentifier:"pretty"|escapeReservedKeywords}} {
    {% filter indent:2," ",true %}{% call casesBlock asset.items %}{% endfilter %}
  }
  {% elif asset.items %}
  {% call casesBlock asset.items %}
  {% endif %}
  {% endfor %}
{% endmacro %}
{% macro allValuesBlock assets filter prefix %}
  {% for asset in assets %}
  {% if asset.type == filter %}
  {{prefix}}{{asset.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}},
  {% elif asset.items and ( forceNamespaces == "true" or asset.isNamespaced == "true" ) %}
  {% set prefix2 %}{{prefix}}{{asset.name|swiftIdentifier:"pretty"|escapeReservedKeywords}}.{% endset %}
  {% call allValuesBlock asset.items filter prefix2 %}
  {% elif asset.items %}
  {% call allValuesBlock asset.items filter prefix %}
  {% endif %}
  {% endfor %}
{% endmacro %}
// swiftlint:disable identifier_name line_length nesting type_body_length type_name
{{accessModifier}} enum {{enumName}} {
  {% if catalogs.count > 1 or param.forceFileNameEnum %}
  {% for catalog in catalogs %}
  {{accessModifier}} enum {{catalog.name|swiftIdentifier:"pretty"|escapeReservedKeywords}} {
    {% if catalog.assets %}
    {% filter indent:2," ",true %}{% call enumBlock catalog.assets %}{% endfilter %}
    {% endif %}
  }
  {% endfor %}
  {% else %}
  {% call enumBlock catalogs.first.assets %}
  {% endif %}
}
// swiftlint:enable identifier_name line_length nesting type_body_length type_name

// MARK: - Implementation Details
{% if hasARResourceGroup %}

{{accessModifier}} struct {{arResourceGroupType}} {
  {{accessModifier}} fileprivate(set) var name: String

  #if os(iOS) || os(visionOS)
  @available(iOS 11.3, *)
  {{accessModifier}} var referenceImages: Set<ARReferenceImage> {
    return ARReferenceImage.referenceImages(in: self)
  }

  @available(iOS 12.0, visionOS 1.0, *)
  {{accessModifier}} var referenceObjects: Set<ARReferenceObject> {
    return ARReferenceObject.referenceObjects(in: self)
  }
  #endif
}

#if os(iOS) || os(visionOS)
@available(iOS 11.3, visionOS 1.0, *)
{{accessModifier}} extension ARReferenceImage {
  static func referenceImages(in asset: {{arResourceGroupType}}) -> Set<ARReferenceImage> {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    return referenceImages(inGroupNamed: asset.name, bundle: bundle) ?? Set()
  }
}

@available(iOS 12.0, visionOS 1.0, *)
{{accessModifier}} extension ARReferenceObject {
  static func referenceObjects(in asset: {{arResourceGroupType}}) -> Set<ARReferenceObject> {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    return referenceObjects(inGroupNamed: asset.name, bundle: bundle) ?? Set()
  }
}
#endif
{% endif %}
{% if hasColor %}

{{accessModifier}} final class {{colorType}} {
  {{accessModifier}} fileprivate(set) var name: String

  #if os(macOS)
  {{accessModifier}} typealias Color = NSColor
  #elseif os(iOS) || os(tvOS) || os(watchOS) || os(visionOS)
  {{accessModifier}} typealias Color = UIColor
  #endif

  @available(iOS 11.0, tvOS 11.0, watchOS 4.0, macOS 10.13, visionOS 1.0, *)
  {{accessModifier}} private(set) lazy var color: Color = {
    guard let color = Color(asset: self) else {
      fatalError("Unable to load color asset named \(name).")
    }
    return color
  }()

  #if os(iOS) || os(tvOS) || os(visionOS)
  @available(iOS 11.0, tvOS 11.0, visionOS 1.0, *)
  {{accessModifier}} func color(compatibleWith traitCollection: UITraitCollection) -> Color {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    guard let color = Color(named: name, in: bundle, compatibleWith: traitCollection) else {
      fatalError("Unable to load color asset named \(name).")
    }
    return color
  }
  #endif

  #if canImport(SwiftUI)
  @available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
  {{accessModifier}} private(set) lazy var swiftUIColor: SwiftUI.Color = {
    SwiftUI.Color(asset: self)
  }()
  #endif

  fileprivate init(name: String) {
    self.name = name
  }
}

{{accessModifier}} extension {{colorType}}.Color {
  @available(iOS 11.0, tvOS 11.0, watchOS 4.0, macOS 10.13, visionOS 1.0, *)
  convenience init?(asset: {{colorType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    #if os(iOS) || os(tvOS) || os(visionOS)
    self.init(named: asset.name, in: bundle, compatibleWith: nil)
    #elseif os(macOS)
    self.init(named: NSColor.Name(asset.name), bundle: bundle)
    #elseif os(watchOS)
    self.init(named: asset.name)
    #endif
  }
}

#if canImport(SwiftUI)
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
{{accessModifier}} extension SwiftUI.Color {
  init(asset: {{colorType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(asset.name, bundle: bundle)
  }
}
#endif
{% endif %}
{% if hasData %}

{{accessModifier}} struct {{dataType}} {
  {{accessModifier}} fileprivate(set) var name: String

  @available(iOS 9.0, tvOS 9.0, watchOS 6.0, macOS 10.11, visionOS 1.0, *)
  {{accessModifier}} var data: NSDataAsset {
    guard let data = NSDataAsset(asset: self) else {
      fatalError("Unable to load data asset named \(name).")
    }
    return data
  }
}

@available(iOS 9.0, tvOS 9.0, watchOS 6.0, macOS 10.11, visionOS 1.0, *)
{{accessModifier}} extension NSDataAsset {
  convenience init?(asset: {{dataType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    #if os(iOS) || os(tvOS) || os(watchOS) || os(visionOS)
    self.init(name: asset.name, bundle: bundle)
    #elseif os(macOS)
    self.init(name: NSDataAsset.Name(asset.name), bundle: bundle)
    #endif
  }
}
{% endif %}
{% if hasImage %}

{{accessModifier}} struct {{imageType}} {
  {{accessModifier}} fileprivate(set) var name: String

  #if os(macOS)
  {{accessModifier}} typealias Image = NSImage
  #elseif os(iOS) || os(tvOS) || os(watchOS) || os(visionOS)
  {{accessModifier}} typealias Image = UIImage
  #endif

  @available(iOS 8.0, tvOS 9.0, watchOS 2.0, macOS 10.7, visionOS 1.0, *)
  {{accessModifier}} var image: Image {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    #if os(iOS) || os(tvOS) || os(visionOS)
    let image = Image(named: name, in: bundle, compatibleWith: nil)
    #elseif os(macOS)
    let name = NSImage.Name(self.name)
    let image = (bundle == .main) ? NSImage(named: name) : bundle.image(forResource: name)
    #elseif os(watchOS)
    let image = Image(named: name)
    #endif
    guard let result = image else {
      fatalError("Unable to load image asset named \(name).")
    }
    return result
  }

  #if os(iOS) || os(tvOS) || os(visionOS)
  @available(iOS 8.0, tvOS 9.0, visionOS 1.0, *)
  {{accessModifier}} func image(compatibleWith traitCollection: UITraitCollection) -> Image {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    guard let result = Image(named: name, in: bundle, compatibleWith: traitCollection) else {
      fatalError("Unable to load image asset named \(name).")
    }
    return result
  }
  #endif

  #if canImport(SwiftUI)
  @available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
  {{accessModifier}} var swiftUIImage: SwiftUI.Image {
    SwiftUI.Image(asset: self)
  }
  #endif
}

{{accessModifier}} extension {{imageType}}.Image {
  @available(iOS 8.0, tvOS 9.0, watchOS 2.0, visionOS 1.0, *)
  @available(macOS, deprecated,
    message: "This initializer is unsafe on macOS, please use the {{imageType}}.image property")
  convenience init?(asset: {{imageType}}) {
    #if os(iOS) || os(tvOS) || os(visionOS)
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(named: asset.name, in: bundle, compatibleWith: nil)
    #elseif os(macOS)
    self.init(named: NSImage.Name(asset.name))
    #elseif os(watchOS)
    self.init(named: asset.name)
    #endif
  }
}

#if canImport(SwiftUI)
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
{{accessModifier}} extension SwiftUI.Image {
  init(asset: {{imageType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(asset.name, bundle: bundle)
  }

  init(asset: {{imageType}}, label: Text) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(asset.name, bundle: bundle, label: label)
  }

  init(decorative asset: {{imageType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(decorative: asset.name, bundle: bundle)
  }
}
#endif
{% endif %}
{% if hasSymbol %}

{{accessModifier}} struct {{symbolType}} {
  {{accessModifier}} fileprivate(set) var name: String

  #if os(iOS) || os(tvOS) || os(watchOS) || os(visionOS)
  @available(iOS 13.0, tvOS 13.0, watchOS 6.0, visionOS 1.0, *)
  {{accessModifier}} typealias Configuration = UIImage.SymbolConfiguration
  {{accessModifier}} typealias Image = UIImage

  @available(iOS 12.0, tvOS 12.0, watchOS 5.0, visionOS 1.0, *)
  {{accessModifier}} var image: Image {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    #if os(iOS) || os(tvOS) || os(visionOS)
    let image = Image(named: name, in: bundle, compatibleWith: nil)
    #elseif os(watchOS)
    let image = Image(named: name)
    #endif
    guard let result = image else {
      fatalError("Unable to load symbol asset named \(name).")
    }
    return result
  }

  @available(iOS 13.0, tvOS 13.0, watchOS 6.0, visionOS 1.0, *)
  {{accessModifier}} func image(with configuration: Configuration) -> Image {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    guard let result = Image(named: name, in: bundle, with: configuration) else {
      fatalError("Unable to load symbol asset named \(name).")
    }
    return result
  }
  #endif

  #if canImport(SwiftUI)
  @available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
  {{accessModifier}} var swiftUIImage: SwiftUI.Image {
    SwiftUI.Image(asset: self)
  }
  #endif
}

#if canImport(SwiftUI)
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, macOS 10.15, visionOS 1.0, *)
{{accessModifier}} extension SwiftUI.Image {
  init(asset: {{symbolType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(asset.name, bundle: bundle)
  }

  init(asset: {{symbolType}}, label: Text) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(asset.name, bundle: bundle, label: label)
  }

  init(decorative asset: {{symbolType}}) {
    let bundle = {{param.bundle|default:"BundleToken.bundle"}}
    self.init(decorative: asset.name, bundle: bundle)
  }
}
#endif
{% endif %}
{% if not param.bundle %}

// swiftlint:disable convenience_type
private final class BundleToken {
  static let bundle: Bundle = {
    #if SWIFT_PACKAGE
    return Bundle.module
    #else
    return Bundle(for: BundleToken.self)
    #endif
  }()
}
// swiftlint:enable convenience_type
{% endif %}
{% else %}
// No assets found
{% endif %}

I guess there is room for improvements, or even some API's which are not correctly marked as available for visionOS 1.0. But keep in mind this is just a draft 😄

@rcolon-shockoe Save this template in your directory. I named it like this: visionOS-supported-xcassets-template.stencil. Go to your swiftgen.yml and leave this in your xcassets config section:

xcassets:
  inputs:
    - Assets.xcassets
  outputs:
    - templatePath: visionOS-supported-xcassets-template.stencil
      output: Assets+Generated.swift