Don't try to build sqlite when cgo isn't enabled

Signed-off-by: A Gardner <3100188+actgardner@users.noreply.github.com>

storage/sql/sqlite.go

@@ -0,0 +1,54 @@
+// +build cgo
+
+package sql
+
+import (
+	"database/sql"
+	"fmt"
+
+	sqlite3 "github.com/mattn/go-sqlite3"
+
+	"github.com/dexidp/dex/pkg/log"
+	"github.com/dexidp/dex/storage"
+)
+
+// SQLite3 options for creating an SQL db.
+type SQLite3 struct {
+	// File to
+	File string `json:"file"`
+}
+
+// Open creates a new storage implementation backed by SQLite3
+func (s *SQLite3) Open(logger log.Logger) (storage.Storage, error) {
+	conn, err := s.open(logger)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+func (s *SQLite3) open(logger log.Logger) (*conn, error) {
+	db, err := sql.Open("sqlite3", s.File)
+	if err != nil {
+		return nil, err
+	}
+	if s.File == ":memory:" {
+		// sqlite3 uses file locks to coordinate concurrent access. In memory
+		// doesn't support this, so limit the number of connections to 1.
+		db.SetMaxOpenConns(1)
+	}
+
+	errCheck := func(err error) bool {
+		sqlErr, ok := err.(sqlite3.Error)
+		if !ok {
+			return false
+		}
+		return sqlErr.ExtendedCode == sqlite3.ErrConstraintPrimaryKey
+	}
+
+	c := &conn{db, &flavorSQLite3, logger, errCheck}
+	if _, err := c.migrate(); err != nil {
+		return nil, fmt.Errorf("failed to perform migrations: %v", err)
+	}
+	return c, nil
+}