SwiftLint

.swiftlint.yml

@@ -0,0 +1,193 @@
+excluded:
+  - .build
+
+disabled_rules:
+    - opening_brace
+    - trailing_comma
+
+nesting:
+  type_level:
+    warning: 3
+    error: 6
+
+opt_in_rules:
+    - array_init
+    - attributes
+    - block_based_kvo
+    - class_delegate_protocol
+    - closing_brace
+    - closure_body_length
+    - closure_end_indentation
+    - closure_parameter_position
+    - closure_spacing
+    - collection_alignment
+    - colon
+    - comma
+    - comment_spacing
+    - compiler_protocol_init
+    - computed_accessors_order
+    - contains_over_filter_count
+    - contains_over_filter_is_empty
+    - contains_over_first_not_nil
+    - contains_over_range_nil_comparison
+    - control_statement
+    - convenience_type
+    - custom_rules
+    - cyclomatic_complexity
+    - deployment_target
+    - discarded_notification_center_observer
+    - discouraged_direct_init
+    - discouraged_object_literal
+    - discouraged_optional_boolean
+    - discouraged_optional_collection
+    - duplicate_enum_cases
+    - duplicate_imports
+    - dynamic_inline
+    - empty_collection_literal
+    - empty_count
+    - empty_enum_arguments
+    - empty_parameters
+    - empty_parentheses_with_trailing_closure
+    - empty_string
+    - empty_xctest_method
+    - enum_case_associated_values_count
+    - expiring_todo
+    - explicit_init
+    - explicit_self
+    - extension_access_modifier
+    - fallthrough
+    - fatal_error_message
+    - file_header
+    - file_length
+    - file_name
+    - file_name_no_space
+    - first_where
+    - flatmap_over_map_reduce
+    - for_where
+    - force_cast
+    - force_try
+    - force_unwrapping
+    - function_body_length
+    - function_default_parameter_at_end
+    - function_parameter_count
+    - generic_type_name
+    - identical_operands
+    - identifier_name
+    - implicit_getter
+    - implicit_return
+    - implicitly_unwrapped_optional
+    - inclusive_language
+    - inert_defer
+    - is_disjoint
+    - joined_default_parameter
+    - large_tuple
+    - last_where
+    - leading_whitespace
+    - legacy_cggeometry_functions
+    - legacy_constant
+    - legacy_constructor
+    - legacy_hashing
+    - legacy_multiple
+    - legacy_nsgeometry_functions
+    - legacy_random
+#    - let_var_whitespace                           # We actually want this, but it currently gets confused with property wrappers.
+    - line_length
+    - literal_expression_end_indentation
+    - lower_acl_than_parent
+    - mark
+    - missing_docs
+    - modifier_order
+    - multiline_arguments
+    - multiline_arguments_brackets
+    - multiline_function_chains
+    - multiline_literal_brackets
+    - multiline_parameters
+    - multiline_parameters_brackets
+    - multiple_closures_with_trailing_closure
+    - nesting
+    - no_fallthrough_only
+    - no_grouping_extension
+    - no_space_in_method_call
+    - notification_center_detachment
+    - nslocalizedstring_key
+    - nslocalizedstring_require_bundle
+    - nsobject_prefer_isequal
+    - number_separator
+    - object_literal
+    - operator_usage_whitespace
+    - operator_whitespace
+    - optional_enum_case_matching
+    - orphaned_doc_comment
+    - overridden_super_call
+    - override_in_extension
+    - pattern_matching_keywords
+    - prefer_self_type_over_type_of_self
+    - prefer_zero_over_explicit_init
+    - private_action
+    - private_outlet
+    - private_over_fileprivate
+    - private_unit_test
+    - prohibited_super_call
+    - protocol_property_accessors_order
+    - quick_discouraged_call
+    - quick_discouraged_focused_test
+    - quick_discouraged_pending_test
+    - raw_value_for_camel_cased_codable_enum
+    - reduce_boolean
+    - reduce_into
+    - redundant_discardable_let
+    - redundant_nil_coalescing
+    - redundant_objc_attribute
+    - redundant_optional_initialization
+    - redundant_set_access_control
+    - redundant_string_enum_value
+    - redundant_type_annotation
+    - redundant_void_return
+    - required_enum_case
+    - return_arrow_whitespace
+    - shorthand_operator
+    - single_test_class
+    - sorted_first_last
+    - sorted_imports
+    - statement_position
+    - static_operator
+    - strict_fileprivate
+    - strong_iboutlet
+    - superfluous_disable_command
+    - switch_case_alignment
+    - switch_case_on_newline
+    - syntactic_sugar
+    - test_case_accessibility
+    - todo
+    - toggle_bool
+    - trailing_closure
+    - trailing_newline
+    - trailing_semicolon
+    - trailing_whitespace
+    - type_body_length
+    - type_name
+    - unavailable_function
+    - unneeded_break_in_switch
+    - unneeded_parentheses_in_closure_argument
+    - unowned_variable_capture
+    - untyped_error_in_catch
+    - unused_capture_list
+    - unused_closure_parameter
+    - unused_control_flow_label
+    - unused_declaration
+    - unused_enumerated
+    - unused_import
+    - unused_optional_binding
+    - unused_setter_value
+    - valid_ibinspectable
+    - vertical_parameter_alignment
+    - vertical_parameter_alignment_on_call
+    - vertical_whitespace
+    - vertical_whitespace_between_cases
+    - vertical_whitespace_closing_braces
+    - vertical_whitespace_opening_braces
+    - void_return
+    - weak_delegate
+    - xct_specific_matcher
+    - xctfail_message
+    - yoda_condition

Sources/LibMakeColors/Generators/AndroidGenerator.swift

@@ -23,8 +23,11 @@ final class AndroidGenerator: Generator {
 
             let value: String
             switch color {
-            case let .color(colorValue): value = colorValue.description
-            case let .reference(ref): value = "@color/\(prefix)\(ref.camelCasePathToSnakeCase())"
+            case let .color(colorValue):
+                value = colorValue.description
+
+            case let .reference(ref):
+                value = "@color/\(prefix)\(ref.camelCasePathToSnakeCase())"
             }
 
             xml += """

Sources/LibMakeColors/Generators/AssetCatalogGenerator.swift

@@ -60,10 +60,10 @@ private extension Color {
             "color" : {
                 "color-space" : "srgb",
                 "components" : {
-                "alpha" : "\(Float(a) / 256)",
-                "blue" : "0x\(String(b, radix: 16))",
-                "green" : "0x\(String(g, radix: 16))",
-                "red" : "0x\(String(r, radix: 16))"
+                "alpha" : "\(Float(alpha) / 256)",
+                "blue" : "0x\(String(blue, radix: 16))",
+                "green" : "0x\(String(green, radix: 16))",
+                "red" : "0x\(String(red, radix: 16))"
                 }
             },
             "idiom" : "universal"

Sources/LibMakeColors/Generators/HTMLGenerator.swift

@@ -2,6 +2,45 @@ import Foundation
 
 final class HTMLGenerator: Generator {
     static let defaultExtension = "html"
+
+    static let head = """
+    <html>
+    <head>
+        <style type="text/css">
+            .checkered {
+                padding: 5px;
+                margin: 5px;
+
+                background-image:
+                    linear-gradient(45deg, #000 25%, transparent 25%),
+                    linear-gradient(45deg, transparent 75%, #000 75%),
+                    linear-gradient(45deg, transparent 75%, #000 75%),
+                    linear-gradient(45deg, #000 25%, transparent 25%);
+
+                background-size:30px 30px;
+
+                background-position:0 0, 0 0, -15px -15px, 15px 15px;
+            }
+
+            .swatch {
+                width:50px;
+                height:50px;
+                display:inline-block;
+            }
+        </style>
+    <body>
+    <table>
+        <thead>
+        <tr>
+            <th>&nbsp;</th>
+            <th>Name</th>
+            <th>Value</th>
+        </tr>
+        </thead>
+        <tbody>
+
+    """
+
     let context: Context
 
     init(context: Context) {
@@ -9,52 +48,27 @@ final class HTMLGenerator: Generator {
     }
 
     func generate(data: [String: ColorDef]) throws -> FileWrapper {
-        var html = """
-        <html>
-        <head>
-            <style type="text/css">
-                .checkered {
-                    padding: 5px;
-                    margin: 5px;
-
-                    background-image:
-                        linear-gradient(45deg, #000 25%, transparent 25%),
-                        linear-gradient(45deg, transparent 75%, #000 75%),
-                        linear-gradient(45deg, transparent 75%, #000 75%),
-                        linear-gradient(45deg, #000 25%, transparent 25%);
-
-                    background-size:30px 30px;
-
-                    background-position:0 0, 0 0, -15px -15px, 15px 15px;
-                }
-            </style>
-        <body>
-        <table>
-            <thead>
-            <tr>
-                <th>&nbsp;</th>
-                <th>Name</th>
-                <th>Value</th>
-            </tr>
-            </thead>
-            <tbody>
-
-        """
+        var html = Self.head
 
         for (key, color) in data.sorted() {
             let actualColor = try data.resolve(key)
             let value: String
 
             switch color {
-            case let .reference(name): value = """
+            case let .reference(name):
+                value = """
                 <a href="#cref/\(name)">\(name.insertCamelCaseSeparators())</a><br>\(actualColor)
                 """
-            case .color: value = actualColor.description
+
+            case .color:
+                value = actualColor.description
             }
 
             html += """
                 <tr>
-                    <td class="checkered" id="cref/\(key)"><span style="background:\(actualColor); width:50px; height:50px;display:inline-block;">&nbsp;&nbsp;</span></td>
+                    <td class="checkered" id="cref/\(key)">
+                        <span style="background:\(actualColor)" class="swatch">&nbsp;</span>
+                    </td>
                     <td>\(key.insertCamelCaseSeparators())</td>
                     <td>\(value)</td>
                 </tr>

Sources/LibMakeColors/MakeColors.swift

@@ -2,18 +2,18 @@ import ArgumentParser
 import Foundation
 
 private struct GeneratorOption: EnumerableFlag, CustomStringConvertible {
-    let type: Generator.Type
-
-    var description: String {
-        type.option
-    }
-
     static let allCases: [GeneratorOption] = [
         .init(type: AssetCatalogGenerator.self),
         .init(type: AndroidGenerator.self),
         .init(type: HTMLGenerator.self),
     ]
 
+    let type: Generator.Type
+
+    var description: String {
+        type.option
+    }
+
     static func == (lhs: GeneratorOption, rhs: GeneratorOption) -> Bool {
         lhs.type == rhs.type
     }
@@ -53,9 +53,12 @@ public final class MakeColors: ParsableCommand, Context {
         for (key, color) in data.sorted() {
             let resolved = try data.resolve(key)
             switch color {
-            case .color: print(key.insertCamelCaseSeparators(), resolved, separator: ": ")
-            case let .reference(r): print(
-                    "\(key.insertCamelCaseSeparators()) (@\(r.insertCamelCaseSeparators()))",
+            case .color:
+                print(key.insertCamelCaseSeparators(), resolved, separator: ": ")
+
+            case let .reference(referenced):
+                print(
+                    "\(key.insertCamelCaseSeparators()) (@\(referenced.insertCamelCaseSeparators()))",
                     resolved,
                     separator: ": "
                 )

Sources/LibMakeColors/Model/Color.swift

@@ -1,23 +1,27 @@
 struct Color: CustomStringConvertible, Equatable {
-    let r, g, b, a: UInt8
+    let red: UInt8
+    let green: UInt8
+    let blue: UInt8
+    let alpha: UInt8
 
-    init(r: UInt8, g: UInt8, b: UInt8, a: UInt8 = 0xFF) {
-        self.r = r
-        self.g = g
-        self.b = b
-        self.a = a
+    init(red: UInt8, green: UInt8, blue: UInt8, alpha: UInt8 = 0xFF) {
+        self.red = red
+        self.green = green
+        self.blue = blue
+        self.alpha = alpha
     }
 
-    init?(_ array: [UInt8]) {
-        guard array.count >= 3 else { return nil }
-        r = array[0]
-        g = array[1]
-        b = array[2]
-        a = array.count >= 4 ? array[3] : 0xFF
+    init(_ array: [UInt8]) {
+        precondition(array.count == 3 || array.count == 4)
+        red = array[0]
+        green = array[1]
+        blue = array[2]
+        alpha = array.count == 4 ? array[3] : 0xFF
     }
 
     var description: String {
-        a != 0xFF ? String(format: "#%02X%02X%02X%02X", r, g, b, a) : String(format: "#%02X%02X%02X", r, g, b)
+        let alphaSuffix = alpha != 0xFF ? String(format: "%02X", alpha) : ""
+        return String(format: "#%02X%02X%02X%@", red, green, blue, alphaSuffix)
     }
 }
 
@@ -49,11 +53,16 @@ extension Dictionary where Key == String, Value == ColorDef {
         sorted(by: Self.compare)
     }
 
-    static func compare(_ a: (String, ColorDef), _ b: (String, ColorDef)) -> Bool {
-        switch (a, b) {
-        case ((_, .color), (_, .reference)): return true
-        case ((_, .reference), (_, .color)): return false
-        case let ((left, _), (right, _)): return left.localizedStandardCompare(right) == .orderedAscending
+    static func compare(_ lhs: (String, ColorDef), _ rhs: (String, ColorDef)) -> Bool {
+        switch (lhs, rhs) {
+        case ((_, .color), (_, .reference)):
+            return true
+
+        case ((_, .reference), (_, .color)):
+            return false
+
+        case let ((left, _), (right, _)):
+            return left.localizedStandardCompare(right) == .orderedAscending
         }
     }
 }

Sources/LibMakeColors/Model/Scanner+ColorParser.swift

@@ -1,26 +1,6 @@
 import Foundation
 
-private extension CharacterSet {
-    static let hex = CharacterSet(charactersIn: "0123456789abcdef")
-    static let name = alphanumerics.union(CharacterSet(charactersIn: "_/"))
-}
-
-private extension Collection {
-    func chunks(size: Int) -> UnfoldSequence<Self.SubSequence, Self.Index> {
-        sequence(state: startIndex) { state -> SubSequence? in
-            guard state != endIndex else { return nil }
-            let next = index(state, offsetBy: size, limitedBy: endIndex) ?? endIndex
-            defer { state = next }
-            return self[state..<next]
-        }
-    }
-}
-
 extension Scanner {
-    func string(_ s: String) -> Bool {
-        scanString(s) != nil
-    }
-
     func color() -> Color? {
         if string("#"), let digits = scanCharacters(from: .hex) {
             switch digits.count {
@@ -34,7 +14,8 @@ extension Scanner {
                 let digits = digits.chunks(size: 2).compactMap { UInt8($0, radix: 16) }
                 return Color(digits)
 
-            default: return nil
+            default:
+                return nil
             }
         }
 
@@ -110,6 +91,7 @@ extension Scanner {
         return result
     }
 
+    // swiftlint:disable:next discouraged_optional_collection
     func commaSeparated() -> [UInt8]? {
         var result: [UInt8] = []
         repeat {
@@ -121,3 +103,25 @@ extension Scanner {
         return result
     }
 }
+
+private extension Scanner {
+    func string(_ string: String) -> Bool {
+        scanString(string) != nil
+    }
+}
+
+private extension CharacterSet {
+    static let hex = CharacterSet(charactersIn: "0123456789abcdef")
+    static let name = alphanumerics.union(CharacterSet(charactersIn: "_/"))
+}
+
+private extension Collection {
+    func chunks(size: Int) -> UnfoldSequence<Self.SubSequence, Self.Index> {
+        sequence(state: startIndex) { state -> SubSequence? in
+            guard state != endIndex else { return nil }
+            let next = index(state, offsetBy: size, limitedBy: endIndex) ?? endIndex
+            defer { state = next }
+            return self[state..<next]
+        }
+    }
+}

Tests/MakeColorsTests/ColorParserTest.swift

@@ -5,36 +5,36 @@ final class ColorParserTest: XCTestCase {
     func testScanningThreeDigitColor() throws {
         let scanner = Scanner(string: "#abc")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 0xAA, g: 0xBB, b: 0xCC), color)
+        XCTAssertEqual(Color(red: 0xAA, green: 0xBB, blue: 0xCC), color)
     }
 
     func testScanningFourDigitColor() throws {
         let scanner = Scanner(string: "#abcd")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 0xAA, g: 0xBB, b: 0xCC, a: 0xDD), color)
+        XCTAssertEqual(Color(red: 0xAA, green: 0xBB, blue: 0xCC, alpha: 0xDD), color)
     }
 
     func testScanningSixDigitColor() throws {
         let scanner = Scanner(string: "#abcdef")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 0xAB, g: 0xCD, b: 0xEF), color)
+        XCTAssertEqual(Color(red: 0xAB, green: 0xCD, blue: 0xEF), color)
     }
 
     func testScanningEightDigitColor() throws {
         let scanner = Scanner(string: "#abcdef17")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 0xAB, g: 0xCD, b: 0xEF, a: 0x17), color)
+        XCTAssertEqual(Color(red: 0xAB, green: 0xCD, blue: 0xEF, alpha: 0x17), color)
     }
 
     func testScanningRGBColor() throws {
         let scanner = Scanner(string: "rgb(1,2,3)")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 1, g: 2, b: 3), color)
+        XCTAssertEqual(Color(red: 1, green: 2, blue: 3), color)
     }
 
     func testScanningRGBAColor() throws {
         let scanner = Scanner(string: "rgba(1,2,3,4)")
         let color = scanner.color()
-        XCTAssertEqual(Color(r: 1, g: 2, b: 3, a: 4), color)
+        XCTAssertEqual(Color(red: 1, green: 2, blue: 3, alpha: 4), color)
     }
 }