Add fill-in option

cmd/translations.go

@@ -105,8 +105,9 @@ translations.swift:
 	cmd.Flags().StringVarP(&flags.Kind, "type", "t", "", "The type of output to generate, valid options are 'ios' or 'android' (Required)")
 	cmd.Flags().IntVarP(&flags.KeyIndex, "index", "k", 0, "The index of the key row, defaults to 0")
 	cmd.Flags().StringArrayVarP(&configurations, "configuration", "c", make([]string, 0), "A configuration string consisting of space separated row index and output path. Multiple configurations can be added, but one is required")
-	cmd.Flags().IntVarP(&flags.DefaultValueIndex, "main-index", "m", 0, "Required for ios. The index of the main/default language row, defaults to 0")
+	cmd.Flags().IntVarP(&flags.DefaultValueIndex, "main-index", "m", 0, "Required for ios or when using fill-in. The index of the main/default language row, defaults to 0")
 	cmd.Flags().StringVarP(&flags.Output, "output", "o", "", "Required for ios. A path for the generated output")
+	cmd.Flags().BoolVarP(&flags.FillIn, "fill-in", "l", false, "Fill in the value from the main/default language if a value is missing for the current language")
 	cmd.MarkFlagRequired("input")
 	cmd.MarkFlagRequired("kind")
 	cmd.MarkFlagRequired("configuration")

docs/generated/lane_translations_generate.md

@@ -55,10 +55,11 @@ lane translations generate [flags]
 
 ```
   -c, --configuration stringArray   A configuration string consisting of space separated row index and output path. Multiple configurations can be added, but one is required
+  -l, --fill-in                     Fill in the value from the main/default language if a value is missing for the current language
   -h, --help                        help for generate
   -k, --index int                   The index of the key row, defaults to 0
   -i, --input string                Path to a CSV file containing a key row and a row for each language (Required)
-  -m, --main-index int              Required for ios. The index of the main/default language row, defaults to 0
+  -m, --main-index int              Required for ios or when using fill-in. The index of the main/default language row, defaults to 0
   -o, --output string               Required for ios. A path for the generated output
   -t, --type string                 The type of output to generate, valid options are 'ios' or 'android' (Required)
 ```

internal/translations/flags.go

@@ -13,6 +13,7 @@ type Flags struct {
 	KeyIndex          int
 	DefaultValueIndex int
 	Output            string
+	FillIn            bool
 }
 
 func (f *Flags) validate() error {

internal/translations/generator_test.go

@@ -53,3 +53,56 @@ func TestIos(t *testing.T) {
 	equalFiles(t, "testdata/ios-da.expected", "../../build/da.strings")
 	equalFiles(t, "testdata/ios-swift.expected", "../../build/Translations.swift")
 }
+
+func TestAndroidWithFillIn(t *testing.T) {
+	flags := Flags{
+		Input:             "testdata/fill-in/input.csv",
+		Kind:              "android",
+		KeyIndex:          1,
+		DefaultValueIndex: 2,
+		FillIn:            true,
+	}
+	configurations := []string{"2 ../../build/en.xml", "3 ../../build/da.xml"}
+
+	err := Generate(context.Background(), &flags, configurations)
+
+	assert.Nil(t, err)
+	equalFiles(t, "testdata/fill-in/android-en.expected", "../../build/en.xml")
+	equalFiles(t, "testdata/fill-in/android-da.expected", "../../build/da.xml")
+}
+
+func TestJsonWithFillIn(t *testing.T) {
+	flags := Flags{
+		Input:             "testdata/fill-in/input.csv",
+		Kind:              "json",
+		KeyIndex:          1,
+		DefaultValueIndex: 2,
+		FillIn:            true,
+	}
+	configurations := []string{"2 ../../build/en.json", "3 ../../build/da.json"}
+
+	err := Generate(context.Background(), &flags, configurations)
+
+	assert.Nil(t, err)
+	equalFiles(t, "testdata/fill-in/json-en.expected", "../../build/en.json")
+	equalFiles(t, "testdata/fill-in/json-da.expected", "../../build/da.json")
+}
+
+func TestIosWithFillIn(t *testing.T) {
+	flags := Flags{
+		Input:             "testdata/fill-in/input.csv",
+		Kind:              "ios",
+		KeyIndex:          1,
+		DefaultValueIndex: 2,
+		Output:            "../../build/Translations.swift",
+		FillIn:            true,
+	}
+	configurations := []string{"2 ../../build/en.strings", "3 ../../build/da.strings"}
+
+	err := Generate(context.Background(), &flags, configurations)
+
+	assert.Nil(t, err)
+	equalFiles(t, "testdata/fill-in/ios-en.expected", "../../build/en.strings")
+	equalFiles(t, "testdata/fill-in/ios-da.expected", "../../build/da.strings")
+	equalFiles(t, "testdata/fill-in/ios-swift.expected", "../../build/Translations.swift")
+}

internal/translations/language_file.go

@@ -10,9 +10,11 @@ import (
 )
 
 type languageFile struct {
-	path       string
-	keyIndex   int
-	valueIndex int
+	path          string
+	keyIndex      int
+	valueIndex    int
+	useFallback   bool
+	fallbackIndex int
 }
 
 type languageFileWriter interface {
@@ -21,7 +23,7 @@ type languageFileWriter interface {
 }
 
 func (f *languageFile) write(writer languageFileWriter, translations *translationData) error {
-	translation := translations.translation(f.keyIndex, f.valueIndex)
+	translation := translations.translation(f.keyIndex, f.valueIndex, f.useFallback, f.fallbackIndex)
 
 	tempPath := f.path + ".tmp"
 	defer os.Remove(tempPath)
@@ -65,31 +67,23 @@ func newLanguageFiles(flags *Flags, configurations []string) ([]languageFileWrit
 		arguments[path] = index
 	}
 
-	once := true
 	list := make([]languageFileWriter, 0)
 	for path, index := range arguments {
 		var writer languageFileWriter
 
 		file := &languageFile{
-			path:       path,
-			keyIndex:   flags.KeyIndex,
-			valueIndex: index,
+			path:          path,
+			keyIndex:      flags.KeyIndex,
+			valueIndex:    index,
+			useFallback:   flags.FillIn,
+			fallbackIndex: flags.DefaultValueIndex,
 		}
 
 		switch flags.Kind {
 		case androidKind:
 			writer = &androidLanguageFile{file: file}
 		case iosKind:
 			writer = &iosLanguageFile{file: file}
-			if once {
-				once = false
-				supporter := &iosSupportLanguageFile{file: &languageFile{
-					path:       flags.Output,
-					keyIndex:   flags.KeyIndex,
-					valueIndex: flags.DefaultValueIndex,
-				}}
-				list = append(list, supporter)
-			}
 		case jsonKind:
 			writer = &jsonLanguageFile{file: file}
 		default:
@@ -99,5 +93,16 @@ func newLanguageFiles(flags *Flags, configurations []string) ([]languageFileWrit
 		list = append(list, writer)
 	}
 
+	switch flags.Kind {
+	case iosKind:
+		supporter := &iosSupportLanguageFile{file: &languageFile{
+			path:        flags.Output,
+			keyIndex:    flags.KeyIndex,
+			valueIndex:  flags.DefaultValueIndex,
+			useFallback: false,
+		}}
+		list = append(list, supporter)
+	}
+
 	return list, nil
 }

internal/translations/language_file_test.go

@@ -112,7 +112,7 @@ func TestLanguageFileWriteInputFile(t *testing.T) {
 	}
 
 	for _, x := range inputWriters {
-		tr := translations.translation(1, x.index)
+		tr := translations.translation(1, x.index, false, 0)
 		var b bytes.Buffer
 
 		err := x.writer.write(tr, &b)

internal/translations/testdata/fill-in/android-da.expected

@@ -0,0 +1,4 @@
+<resources>
+	<string name="something">Noget</string>
+	<string name="something_only_in_en">Something only in English</string>
+</resources>

internal/translations/testdata/fill-in/android-en.expected

@@ -0,0 +1,4 @@
+<resources>
+	<string name="something">Something</string>
+	<string name="something_only_in_en">Something only in English</string>
+</resources>

internal/translations/testdata/fill-in/input.csv

@@ -0,0 +1,3 @@
+KEY,EN,DA
+SOMETHING,Something,Noget
+SOMETHING_ONLY_IN_EN,"Something only in English",

internal/translations/testdata/fill-in/ios-da.expected

@@ -0,0 +1,2 @@
+"SOMETHING" = "Noget";
+"SOMETHING_ONLY_IN_EN" = "Something only in English";

internal/translations/testdata/fill-in/ios-en.expected

@@ -0,0 +1,2 @@
+"SOMETHING" = "Something";
+"SOMETHING_ONLY_IN_EN" = "Something only in English";

internal/translations/testdata/fill-in/ios-swift.expected

@@ -0,0 +1,6 @@
+// swiftlint:disable all
+import Foundation
+struct Translations {
+	static let SOMETHING = NSLocalizedString("SOMETHING", comment: "")
+	static let SOMETHING_ONLY_IN_EN = NSLocalizedString("SOMETHING_ONLY_IN_EN", comment: "")
+}

internal/translations/testdata/fill-in/json-da.expected

@@ -0,0 +1,4 @@
+{
+  "something": "Noget",
+  "something_only_in_en": "Something only in English"
+}

internal/translations/testdata/fill-in/json-en.expected

@@ -0,0 +1,4 @@
+{
+  "something": "Something",
+  "something_only_in_en": "Something only in English"
+}

internal/translations/translations.go

@@ -30,10 +30,14 @@ func newTranslations(path string) (*translationData, error) {
 	return &translationData{data: records}, nil
 }
 
-func (t *translationData) translation(keyIndex int, valueIndex int) *translation {
+func (t *translationData) translation(keyIndex int, valueIndex int, useFallback bool, fallbackIndex int) *translation {
 	items := map[string]string{}
 	for _, r := range t.data {
-		items[strings.ToLower(r[keyIndex-1])] = r[valueIndex-1]
+		s := r[valueIndex-1]
+		if useFallback && s == "" {
+			s = r[fallbackIndex-1]
+		}
+		items[strings.ToLower(r[keyIndex-1])] = s
 	}
 	return newTranslation(items)
 }

internal/translations/translations_test.go

@@ -27,7 +27,7 @@ func TestTranslationsTranslation(t *testing.T) {
 	if !assert.NoError(t, err) {
 		return
 	}
-	translation := translations.translation(1, 3)
+	translation := translations.translation(1, 3, false, 0)
 
 	assert.NotNil(t, translation)
 }