feat: allow using SQLite without built tag via include (#662)

dialect_sqlite.go

@@ -1,10 +1,9 @@
-//go:build sqlite
-// +build sqlite
-
 package pop
 
 import (
+	"database/sql"
 	"database/sql/driver"
+	"errors"
 	"fmt"
 	"io"
 	"net/url"
@@ -21,8 +20,6 @@ import (
 	"github.com/gobuffalo/pop/v6/internal/defaults"
 	"github.com/gobuffalo/pop/v6/logging"
 	"github.com/jmoiron/sqlx"
-	"github.com/mattn/go-sqlite3"
-	_ "github.com/mattn/go-sqlite3" // Load SQLite3 CGo driver
 )
 
 const nameSQLite3 = "sqlite3"
@@ -43,6 +40,15 @@ type sqlite struct {
 	smGil *sync.Mutex
 }
 
+func requireSQLite3() error {
+	for _, driverName := range sql.Drivers() {
+		if driverName == nameSQLite3 {
+			return nil
+		}
+	}
+	return errors.New("sqlite3 support was not compiled into the binary")
+}
+
 func (m *sqlite) Name() string {
 	return nameSQLite3
 }
@@ -263,6 +269,10 @@ func (m *sqlite) TruncateAll(tx *Connection) error {
 }
 
 func newSQLite(deets *ConnectionDetails) (dialect, error) {
+	err := requireSQLite3()
+	if err != nil {
+		return nil, err
+	}
 	deets.URL = fmt.Sprintf("sqlite3://%s", deets.Database)
 	cd := &sqlite{
 		gil:           &sync.Mutex{},
@@ -328,5 +338,13 @@ func finalizerSQLite(cd *ConnectionDetails) {
 }
 
 func newSQLiteDriver() (driver.Driver, error) {
-	return new(sqlite3.SQLiteDriver), nil
+	err := requireSQLite3()
+	if err != nil {
+		return nil, err
+	}
+	db, err := sql.Open(nameSQLite3, ":memory:?cache=newSQLiteDriver_temporary")
+	if err != nil {
+		return nil, err
+	}
+	return db.Driver(), db.Close()
 }

dialect_sqlite_tag.go

@@ -0,0 +1,8 @@
+//go:build sqlite
+// +build sqlite
+
+package pop
+
+import (
+	_ "github.com/mattn/go-sqlite3" // Load SQLite3 CGo driver
+)