Add support for multiple config files via --config a.toml,b.toml,c.toml

hugolib/config_test.go

@@ -41,3 +41,27 @@ func TestLoadConfig(t *testing.T) {
 	// default
 	assert.Equal(t, "layouts", cfg.GetString("layoutDir"))
 }
+func TestLoadMultiConfig(t *testing.T) {
+	t.Parallel()
+
+	// Add a random config variable for testing.
+	// side = page in Norwegian.
+	configContentBase := `
+	DontChange = "same"
+	PaginatePath = "side"
+	`
+	configContentSub := `
+	PaginatePath = "top"
+	`
+	mm := afero.NewMemMapFs()
+
+	writeToFs(t, mm, "base.toml", configContentBase)
+
+	writeToFs(t, mm, "override.toml", configContentSub)
+
+	cfg, err := LoadConfig(mm, "", "base.toml,override.toml")
+	require.NoError(t, err)
+
+	assert.Equal(t, "top", cfg.GetString("paginatePath"))
+	assert.Equal(t, "same", cfg.GetString("DontChange"))
+}