How to use SwiftGen and LocalizedStringKey in SwiftUI

Issue #798

swiftgen.yml

strings:
  inputs: PastePal/Resources/Localizable/en.lproj
  outputs:
    - templatePath: swiftgen-swiftui-template.stencil
      output: PastePal/Resources/Strings.swift

Template from https://github.com/SwiftGen/SwiftGen/issues/685

swiftgen-swiftui-template.stencil

// Generated using SwiftGen — https://github.com/SwiftGen/SwiftGen

{% if tables.count > 0 %}
import SwiftUI

// MARK: - Strings

{% macro parametersBlock types %}{% filter removeNewlines:"leading" %}
  {% for type in types %}
    {% if type == "String" %}
    _ p{{forloop.counter}}: Any
    {% else %}
    _ p{{forloop.counter}}: {{type}}
    {% endif %}
    {{ ", " if not forloop.last }}
  {% endfor %}
{% endfilter %}{% endmacro %}
{% macro argumentsBlock types %}{% filter removeNewlines:"leading" %}
  {% for type in types %}
    {% if type == "String" %}
    String(describing: p{{forloop.counter}})
    {% elif type == "UnsafeRawPointer" %}
    Int(bitPattern: p{{forloop.counter}})
    {% else %}
    p{{forloop.counter}}
    {% endif %}
    {{ ", " if not forloop.last }}
  {% endfor %}
{% endfilter %}{% endmacro %}
{% macro recursiveBlock table item %}
  {% for string in item.strings %}
  {% if not param.noComments %}
  /// {{string.translation}}
  {% endif %}
  {% if string.types %}
  public static func {{string.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}}({% call parametersBlock string.types %}) -> String {
    return L10n.tr("{{table}}", "{{string.key}}", {% call argumentsBlock string.types %})
  }
  {% else %}
  public static let {{string.name|swiftIdentifier:"pretty"|lowerFirstWord|escapeReservedKeywords}} = LocalizedString(lookupKey: "{{string.key}}")
  {% endif %}
  {% endfor %}
  {% for child in item.children %}
  public enum {{child.name|swiftIdentifier:"pretty"|escapeReservedKeywords}} {
    {% filter indent:2 %}{% call recursiveBlock table child %}{% endfilter %}
  }
  {% endfor %}
{% endmacro %}
public enum L10n {
  {% if tables.count > 1 or param.forceFileNameEnum %}
  {% for table in tables %}
  public enum {{table.name|swiftIdentifier:"pretty"|escapeReservedKeywords}} {
    {% filter indent:2 %}{% call recursiveBlock table.name table.levels %}{% endfilter %}
  }
  {% endfor %}
  {% else %}
  {% call recursiveBlock tables.first.name tables.first.levels %}
  {% endif %}
}

// MARK: - Implementation Details

extension L10n {
  fileprivate static func tr(_ table: String, _ key: String, _ args: CVarArg...) -> String {
    let format = {{param.bundle|default:"BundleToken.bundle"}}.localizedString(forKey: key, value: nil, table: table)
    return String(format: format, locale: Locale.current, arguments: args)
  }
}

public struct LocalizedString {
  internal let lookupKey: String

  var key: LocalizedStringKey {
    LocalizedStringKey(lookupKey)
  }

  var text: String {
    L10n.tr("Localizable", lookupKey)
  }
}
{% if not param.bundle %}

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

For Image and Color, use https://github.com/gtokman/SwiftGen-SwiftUI-xcassets