Add languages to metadata and use for language integration in macOS

cmd/fyne/internal/commands/package-darwin.go

@@ -21,6 +21,15 @@ type darwinData struct {
 	Version       string
 	Build         int
 	Category      string
+	Languages     []string
+}
+
+func darwinLangs(langs []string) []string {
+	r := make([]string, len(langs))
+	for n, lang := range langs {
+		r[n] = strings.Replace(lang, "-", "_", 1)
+	}
+	return r
 }
 
 func (p *Packager) packageDarwin() (err error) {
@@ -40,7 +49,7 @@ func (p *Packager) packageDarwin() (err error) {
 	}()
 
 	tplData := darwinData{Name: p.Name, ExeName: exeName, AppID: p.AppID, Version: p.AppVersion, Build: p.AppBuild,
-		Category: strings.ToLower(p.category)}
+		Category: strings.ToLower(p.category), Languages: darwinLangs(p.langs)}
 	if err := templates.InfoPlistDarwin.Execute(infoFile, tplData); err != nil {
 		return fmt.Errorf("failed to write plist template: %w", err)
 	}

cmd/fyne/internal/commands/package-darwin_test.go

@@ -0,0 +1,15 @@
+package commands
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDarwinLangs(t *testing.T) {
+	langs := darwinLangs([]string{"en-GB", "de-CH"})
+
+	assert.Equal(t, 2, len(langs))
+	assert.Equal(t, "en_GB", langs[0])
+	assert.Equal(t, "de_CH", langs[1])
+}

cmd/fyne/internal/commands/package.go

@@ -134,6 +134,7 @@ type Packager struct {
 	certificate, profile           string // optional flags for releasing
 	tags, category                 string
 	tempDir                        string
+	langs                          []string
 
 	customMetadata      keyValueFlag
 	linuxAndBSDMetadata *metadata.LinuxAndBSD
@@ -344,6 +345,7 @@ func (p *Packager) validate() (err error) {
 
 		p.appData.mergeMetadata(data)
 		p.sourceMetadata = data.Source
+		p.langs = data.Languages
 
 		p.linuxAndBSDMetadata = data.LinuxAndBSD
 	}

cmd/fyne/internal/templates/data/Info.plist

@@ -26,9 +26,17 @@
 	<string>6.0</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
+	{{- if .Languages}}
+	<key>CFBundleLocalizations</key>
+	<array>
+		{{- range .Languages}}
+		<string>{{.}}</string>
+		{{- end}}
+	</array>
+	{{- end}}
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.{{.Category}}</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>10.11</string>
 </dict>
-</plist>
+</plist>

internal/metadata/data.go

@@ -8,6 +8,7 @@ type FyneApp struct {
 	Release     map[string]string `toml:",omitempty"`
 	Source      *AppSource        `toml:",omitempty"`
 	LinuxAndBSD *LinuxAndBSD      `toml:",omitempty"`
+	Languages   []string          `toml:",omitempty"`
 }
 
 // AppDetails describes the build information, this group may be OS or arch specific