Add static_mock.go to allow building with CGO_ENABLED=0

sqlite3.go

@@ -1,3 +1,5 @@
+// +build cgo
+
 // Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
 //
 // Use of this source code is governed by an MIT-style

sqlite3_go18.go

@@ -1,3 +1,5 @@
+// +build cgo
+
 // Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
 //
 // Use of this source code is governed by an MIT-style

static_mock.go

@@ -0,0 +1,21 @@
+// +build !cgo
+
+package sqlite3
+
+import (
+	"database/sql"
+	"database/sql/driver"
+	"errors"
+)
+
+func init() {
+	sql.Register("sqlite3", &SQLiteDriverMock{})
+}
+
+type SQLiteDriverMock struct{}
+
+var errorMsg = errors.New("Binary was compiled with 'CGO_ENABLED=0', go-sqlite3 requires cgo to work. This is a stub")
+
+func (SQLiteDriverMock) Open(s string) (driver.Conn, error) {
+	return nil, errorMsg
+}