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Added driver for crate.io database
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dereulenspiegel committed Jun 16, 2016
1 parent ce1b59b commit 907d8cd
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Showing 4 changed files with 197 additions and 1 deletion.
5 changes: 4 additions & 1 deletion docker-compose.yml
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ go-test:
- postgres
- mysql
- cassandra
- crate
go-build:
<<: *go
command: sh -c 'go get -v && go build -ldflags ''-s'' -o migrater'
Expand All @@ -21,6 +22,8 @@ mysql:
image: mysql
environment:
MYSQL_DATABASE: migratetest
MYSQL_ALLOW_EMPTY_PASSWORD: yes
MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
cassandra:
image: cassandra:2.2
crate:
image: crate
105 changes: 105 additions & 0 deletions driver/crate/crate.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,105 @@
// Package crate implements a driver for the Crate.io database
package crate

import (
"database/sql"
"fmt"
"strings"

_ "github.com/herenow/go-crate"
"github.com/mattes/migrate/driver"
"github.com/mattes/migrate/file"
"github.com/mattes/migrate/migrate/direction"
)

func init() {
driver.RegisterDriver("crate", &Driver{})
}

type Driver struct {
db *sql.DB
}

const tableName = "schema_migrations"

func (driver *Driver) Initialize(url string) error {
db, err := sql.Open("crate", url)
if err != nil {
return err
}
if err := db.Ping(); err != nil {
return err
}
driver.db = db

if err := driver.ensureVersionTableExists(); err != nil {
return err
}
return nil
}

func (driver *Driver) Close() error {
if err := driver.db.Close(); err != nil {
return err
}
return nil
}

func (driver *Driver) FilenameExtension() string {
return "sql"
}

func (driver *Driver) Version() (uint64, error) {
var version uint64
err := driver.db.QueryRow("SELECT version FROM " + tableName + " ORDER BY version DESC LIMIT 1").Scan(&version)
switch {
case err == sql.ErrNoRows:
return 0, nil
case err != nil:
return 0, err
default:
return version, nil
}
}

func (driver *Driver) Migrate(f file.File, pipe chan interface{}) {
defer close(pipe)
pipe <- f

if err := f.ReadContent(); err != nil {
pipe <- err
return
}

lines := strings.Split(string(f.Content), ";")
for _, line := range lines {
query := strings.TrimSpace(line)
query = strings.Replace(query, ";", "", -1)
if query != "" {
_, err := driver.db.Exec(query)
if err != nil {
pipe <- err
return
}
}
}

if f.Direction == direction.Up {
if _, err := driver.db.Exec("INSERT INTO "+tableName+" (version) VALUES (?)", f.Version); err != nil {
pipe <- err
return
}
} else if f.Direction == direction.Down {
if _, err := driver.db.Exec("DELETE FROM "+tableName+" WHERE version=?", f.Version); err != nil {
pipe <- err
return
}
}
}

func (driver *Driver) ensureVersionTableExists() error {
if _, err := driver.db.Exec(fmt.Sprintf("CREATE TABLE IF NOT EXISTS %s (version INTEGER PRIMARY KEY)", tableName)); err != nil {
return err
}
return nil
}
87 changes: 87 additions & 0 deletions driver/crate/crate_test.go
Original file line number Diff line number Diff line change
@@ -0,0 +1,87 @@
package crate

import (
"fmt"
"os"
"testing"

"github.com/mattes/migrate/file"
"github.com/mattes/migrate/migrate/direction"
pipep "github.com/mattes/migrate/pipe"
)

func TestMigrate(t *testing.T) {
host := os.Getenv("CRATE_PORT_4200_TCP_ADDR")
port := os.Getenv("CRATE_PORT_4200_TCP_PORT")

url := fmt.Sprintf("http://%s:%s", host, port)

driver := &Driver{}

if err := driver.Initialize(url); err != nil {
t.Fatal(err)
}

successFiles := []file.File{
{
Path: "/foobar",
FileName: "001_foobar.up.sql",
Version: 1,
Name: "foobar",
Direction: direction.Up,
Content: []byte(`
CREATE TABLE yolo (
id integer primary key,
msg string
);
`),
},
{
Path: "/foobar",
FileName: "002_foobar.down.sql",
Version: 1,
Name: "foobar",
Direction: direction.Down,
Content: []byte(`
DROP TABLE yolo;
`),
},
}

failFiles := []file.File{
{
Path: "/foobar",
FileName: "002_foobar.up.sql",
Version: 2,
Name: "foobar",
Direction: direction.Up,
Content: []byte(`
CREATE TABLE error (
id THIS WILL CAUSE AN ERROR
)
`),
},
}

for _, file := range successFiles {
pipe := pipep.New()
go driver.Migrate(file, pipe)
errs := pipep.ReadErrors(pipe)
if len(errs) > 0 {
t.Fatal(errs)
}
}

for _, file := range failFiles {
pipe := pipep.New()
go driver.Migrate(file, pipe)
errs := pipep.ReadErrors(pipe)
if len(errs) == 0 {
t.Fatal("Migration should have failed but succeeded")
}
}

if err := driver.Close(); err != nil {
t.Fatal(err)
}
}
1 change: 1 addition & 0 deletions main.go
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ import (
"github.com/fatih/color"
_ "github.com/mattes/migrate/driver/bash"
_ "github.com/mattes/migrate/driver/cassandra"
_ "github.com/mattes/migrate/driver/crate"
_ "github.com/mattes/migrate/driver/mysql"
_ "github.com/mattes/migrate/driver/postgres"
_ "github.com/mattes/migrate/driver/sqlite3"
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