adapted the sqlite driver for v3 (#165)

Makefile

@@ -1,5 +1,5 @@
 SOURCE ?= file go-bindata github aws-s3 google-cloud-storage
-DATABASE ?= postgres mysql redshift spanner
+DATABASE ?= postgres mysql redshift sqlite3 spanner
 VERSION ?= $(shell git describe --tags 2>/dev/null | cut -c 2-)
 TEST_FLAGS ?=
 REPO_OWNER ?= $(shell cd .. && basename "$$(pwd)")

README.md

@@ -25,7 +25,7 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
   * [Redshift](database/redshift)
   * [Ql](database/ql)
   * [Cassandra](database/cassandra) ([todo #164](https://github.com/mattes/migrate/issues/164))
-  * [SQLite](database/sqlite) ([todo #165](https://github.com/mattes/migrate/issues/165))
+  * [SQLite](database/sqlite3)
   * [MySQL/ MariaDB](database/mysql)
   * [Neo4j](database/neo4j) ([todo #167](https://github.com/mattes/migrate/issues/167))
   * [MongoDB](database/mongodb) ([todo #169](https://github.com/mattes/migrate/issues/169))

database/sqlite3/migration/33_create_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS pets;

database/sqlite3/migration/33_create_table.up.sql

@@ -0,0 +1,3 @@
+CREATE TABLE pets (
+  name string
+);

database/sqlite3/migration/44_alter_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS pets;

database/sqlite3/migration/44_alter_table.up.sql

@@ -0,0 +1 @@
+ALTER TABLE pets ADD predator bool;

database/sqlite3/sqlite3.go

@@ -0,0 +1,214 @@
+package sqlite3
+
+import (
+	"database/sql"
+	"fmt"
+	"github.com/mattes/migrate"
+	"github.com/mattes/migrate/database"
+	_ "github.com/mattn/go-sqlite3"
+	"io"
+	"io/ioutil"
+	nurl "net/url"
+	"strings"
+)
+
+func init() {
+	database.Register("sqlite3", &Sqlite{})
+}
+
+var DefaultMigrationsTable = "schema_migrations"
+var (
+	ErrDatabaseDirty  = fmt.Errorf("database is dirty")
+	ErrNilConfig      = fmt.Errorf("no config")
+	ErrNoDatabaseName = fmt.Errorf("no database name")
+)
+
+type Config struct {
+	MigrationsTable string
+	DatabaseName    string
+}
+
+type Sqlite struct {
+	db       *sql.DB
+	isLocked bool
+
+	config *Config
+}
+
+func WithInstance(instance *sql.DB, config *Config) (database.Driver, error) {
+	if config == nil {
+		return nil, ErrNilConfig
+	}
+
+	if err := instance.Ping(); err != nil {
+		return nil, err
+	}
+	if len(config.MigrationsTable) == 0 {
+		config.MigrationsTable = DefaultMigrationsTable
+	}
+
+	mx := &Sqlite{
+		db:     instance,
+		config: config,
+	}
+	if err := mx.ensureVersionTable(); err != nil {
+		return nil, err
+	}
+	return mx, nil
+}
+
+func (m *Sqlite) ensureVersionTable() error {
+
+	query := fmt.Sprintf(`
+	CREATE TABLE IF NOT EXISTS %s (version uint64,dirty bool);
+  CREATE UNIQUE INDEX IF NOT EXISTS version_unique ON %s (version);
+  `, DefaultMigrationsTable, DefaultMigrationsTable)
+
+	if _, err := m.db.Exec(query); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (m *Sqlite) Open(url string) (database.Driver, error) {
+	purl, err := nurl.Parse(url)
+	if err != nil {
+		return nil, err
+	}
+	dbfile := strings.Replace(migrate.FilterCustomQuery(purl).String(), "sqlite3://", "", 1)
+	db, err := sql.Open("sqlite3", dbfile)
+	if err != nil {
+		return nil, err
+	}
+
+	migrationsTable := purl.Query().Get("x-migrations-table")
+	if len(migrationsTable) == 0 {
+		migrationsTable = DefaultMigrationsTable
+	}
+	mx, err := WithInstance(db, &Config{
+		DatabaseName:    purl.Path,
+		MigrationsTable: migrationsTable,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return mx, nil
+}
+
+func (m *Sqlite) Close() error {
+	return m.db.Close()
+}
+
+func (m *Sqlite) Drop() error {
+	query := `SELECT name FROM sqlite_master WHERE type = 'table';`
+	tables, err := m.db.Query(query)
+	if err != nil {
+		return &database.Error{OrigErr: err, Query: []byte(query)}
+	}
+	defer tables.Close()
+	tableNames := make([]string, 0)
+	for tables.Next() {
+		var tableName string
+		if err := tables.Scan(&tableName); err != nil {
+			return err
+		}
+		if len(tableName) > 0 {
+			tableNames = append(tableNames, tableName)
+		}
+	}
+	if len(tableNames) > 0 {
+		for _, t := range tableNames {
+			query := "DROP TABLE " + t
+			err = m.executeQuery(query)
+			if err != nil {
+				return &database.Error{OrigErr: err, Query: []byte(query)}
+			}
+		}
+		if err := m.ensureVersionTable(); err != nil {
+			return err
+		}
+		query := "VACUUM"
+		_, err = m.db.Query(query)
+		if err != nil {
+			return &database.Error{OrigErr: err, Query: []byte(query)}
+		}
+	}
+
+	return nil
+}
+
+func (m *Sqlite) Lock() error {
+	if m.isLocked {
+		return database.ErrLocked
+	}
+	m.isLocked = true
+	return nil
+}
+
+func (m *Sqlite) Unlock() error {
+	if !m.isLocked {
+		return nil
+	}
+	m.isLocked = false
+	return nil
+}
+
+func (m *Sqlite) Run(migration io.Reader) error {
+	migr, err := ioutil.ReadAll(migration)
+	if err != nil {
+		return err
+	}
+	query := string(migr[:])
+
+	return m.executeQuery(query)
+}
+
+func (m *Sqlite) executeQuery(query string) error {
+	tx, err := m.db.Begin()
+	if err != nil {
+		return &database.Error{OrigErr: err, Err: "transaction start failed"}
+	}
+	if _, err := tx.Exec(query); err != nil {
+		tx.Rollback()
+		return &database.Error{OrigErr: err, Query: []byte(query)}
+	}
+	if err := tx.Commit(); err != nil {
+		return &database.Error{OrigErr: err, Err: "transaction commit failed"}
+	}
+	return nil
+}
+
+func (m *Sqlite) SetVersion(version int, dirty bool) error {
+	tx, err := m.db.Begin()
+	if err != nil {
+		return &database.Error{OrigErr: err, Err: "transaction start failed"}
+	}
+
+	query := "DELETE FROM " + m.config.MigrationsTable
+	if _, err := tx.Exec(query); err != nil {
+		return &database.Error{OrigErr: err, Query: []byte(query)}
+	}
+
+	if version >= 0 {
+		query := fmt.Sprintf(`INSERT INTO %s (version, dirty) VALUES (%d, '%t')`, m.config.MigrationsTable, version, dirty)
+		if _, err := tx.Exec(query); err != nil {
+			tx.Rollback()
+			return &database.Error{OrigErr: err, Query: []byte(query)}
+		}
+	}
+
+	if err := tx.Commit(); err != nil {
+		return &database.Error{OrigErr: err, Err: "transaction commit failed"}
+	}
+
+	return nil
+}
+
+func (m *Sqlite) Version() (version int, dirty bool, err error) {
+	query := "SELECT version, dirty FROM " + m.config.MigrationsTable + " LIMIT 1"
+	err = m.db.QueryRow(query).Scan(&version, &dirty)
+	if err != nil {
+		return database.NilVersion, false, nil
+	}
+	return version, dirty, nil
+}

database/sqlite3/sqlite3_test.go

@@ -0,0 +1,61 @@
+package sqlite3
+
+import (
+	"database/sql"
+	"fmt"
+	"github.com/mattes/migrate"
+	dt "github.com/mattes/migrate/database/testing"
+	_ "github.com/mattes/migrate/source/file"
+	_ "github.com/mattn/go-sqlite3"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func Test(t *testing.T) {
+	dir, err := ioutil.TempDir("", "sqlite3-driver-test")
+	if err != nil {
+		return
+	}
+	defer func() {
+		os.RemoveAll(dir)
+	}()
+	fmt.Printf("DB path : %s\n", filepath.Join(dir, "sqlite3.db"))
+	p := &Sqlite{}
+	addr := fmt.Sprintf("sqlite3://%s", filepath.Join(dir, "sqlite3.db"))
+	d, err := p.Open(addr)
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+
+	db, err := sql.Open("sqlite3", filepath.Join(dir, "sqlite3.db"))
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err := db.Close(); err != nil {
+			return
+		}
+	}()
+	dt.Test(t, d, []byte("CREATE TABLE t (Qty int, Name string);"))
+	driver, err := WithInstance(db, &Config{})
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+	if err := d.Drop(); err != nil {
+		t.Fatal(err)
+	}
+
+	m, err := migrate.NewWithDatabaseInstance(
+		"file://./migration",
+		"ql", driver)
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+	fmt.Println("UP")
+	err = m.Up()
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+}