Add GET /api/v1/download/linux-package

Redirects to the newest MusicPlayer release's _linux.tar.gz, which has the
icon, a menu entry and install.sh. /download/linux keeps serving the bare
.x86_64, which updating in place needs. Releases without the package get 404.

Closes #34

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/backend/releases_test.go

@@ -52,6 +52,26 @@ func TestReleaseService(t *testing.T) {
 	assert.ErrorIs(t, err, ErrNotFound)
 }
 
+func TestReleaseServiceLinuxBinaryAndPackage(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		json.NewEncoder(w).Encode(giteaRelease{Id: 1, Name: "v1.9.0", Assets: []giteaAsset{
+			{Name: "MusicPlayer_1.9.0.exe", DownloadUrl: "https://example.com/exe"},
+			{Name: "MusicPlayer_1.9.0_linux.tar.gz", DownloadUrl: "https://example.com/package"},
+			{Name: "MusicPlayer_1.9.0.x86_64", DownloadUrl: "https://example.com/binary"},
+		}})
+	}))
+	t.Cleanup(server.Close)
+	r := NewReleaseService(server.URL)
+	ctx := context.Background()
+
+	binary, err := r.AssetURL(ctx, ".x86_64")
+	require.NoError(t, err)
+	assert.Equal(t, "https://example.com/binary", binary)
+	pkg, err := r.AssetURL(ctx, "_linux.tar.gz")
+	require.NoError(t, err)
+	assert.Equal(t, "https://example.com/package", pkg)
+}
+
 func TestReleaseServiceCachesRelease(t *testing.T) {
 	server, calls := newGitea(t, http.StatusOK)
 	r := NewReleaseService(server.URL)

internal/server/handlers_test.go

@@ -222,7 +222,27 @@ func TestDownloadEndpoints(t *testing.T) {
 	assert.Equal(t, http.StatusFound, rec.Code)
 	assert.Equal(t, "https://example.com/Player.exe", rec.Header().Get("Location"))
 
+	// A release without Linux files, like those before 1.9.
 	assert.Equal(t, http.StatusNotFound, e.do(http.MethodGet, "/api/v1/download/linux").Code)
+	assert.Equal(t, http.StatusNotFound, e.do(http.MethodGet, "/api/v1/download/linux-package").Code)
+}
+
+func TestDownloadLinuxBinaryAndPackage(t *testing.T) {
+	gitea := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(`{"id":1,"name":"v1.9.0","assets":[` +
+			`{"name":"MusicPlayer_1.9.0_linux.tar.gz","browser_download_url":"https://example.com/package"},` +
+			`{"name":"MusicPlayer_1.9.0.x86_64","browser_download_url":"https://example.com/binary"}]}`))
+	}))
+	t.Cleanup(gitea.Close)
+	e := newTestEnv(t, func(c *config.Config) { c.ReleasesURL = gitea.URL })
+
+	rec := e.do(http.MethodGet, "/api/v1/download/linux")
+	assert.Equal(t, http.StatusFound, rec.Code)
+	assert.Equal(t, "https://example.com/binary", rec.Header().Get("Location"), "the bare binary, for updating in place")
+
+	rec = e.do(http.MethodGet, "/api/v1/download/linux-package")
+	assert.Equal(t, http.StatusFound, rec.Code)
+	assert.Equal(t, "https://example.com/package", rec.Header().Get("Location"))
 }
 
 func TestDownloadUpstreamDown(t *testing.T) {

internal/server/misc_handler.go

@@ -102,4 +102,6 @@ func (s *Server) registerMisc(a huma.API) {
 	}
 	download("download-client-windows", "/download/windows", "Windows", ".exe")
 	download("download-client-linux", "/download/linux", "Linux", ".x86_64")
+	// The package has the icon, a menu entry and install.sh. Releases before 1.9 have none (404).
+	download("download-client-linux-package", "/download/linux-package", "Linux (package with installer)", "_linux.tar.gz")
 }

internal/server/openapi_test.go

@@ -81,6 +81,7 @@ func TestOpenAPIDocumentsTheV1API(t *testing.T) {
 		"GET /api/v1/character/list",
 		"GET /api/v1/download",
 		"GET /api/v1/download/linux",
+		"GET /api/v1/download/linux-package",
 		"GET /api/v1/download/list",
 		"GET /api/v1/download/windows",
 		"GET /api/v1/health",
@@ -235,6 +236,7 @@ func TestResponsesMatchOpenAPI(t *testing.T) {
 	v.check(http.MethodGet, "/api/v1/download/list", "", http.StatusOK)
 	v.check(http.MethodGet, "/api/v1/download/windows", "", http.StatusFound)
 	v.check(http.MethodGet, "/api/v1/download/linux", "", http.StatusNotFound)
+	v.check(http.MethodGet, "/api/v1/download/linux-package", "", http.StatusNotFound)
 	v.check(http.MethodGet, "/api/v1/health", "", http.StatusOK)
 	v.check(http.MethodGet, "/api/v1/version", "", http.StatusOK)
 	v.check(http.MethodGet, "/api/v1/version/history", "", http.StatusOK)