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https://github.com/matcornic/migrate

Database migrations. CLI and Golang library.
https://github.com/matcornic/migrate

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Database migrations. CLI and Golang library.

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# migrate

__Database migrations written in Go. Use as [CLI](#cli-usage) or import as [library](#use-in-your-go-project).__

* Migrate reads migrations from [sources](#migration-sources)
and applies them in correct order to a [database](#databases).
* Drivers are "dumb", migrate glues everything together and makes sure the logic is bulletproof.
(Keeps the drivers lightweight, too.)
* Database drivers don't assume things or try to correct user input. When in doubt, fail.

Looking for [v1](https://github.com/golang-migrate/migrate/tree/v1)?

## Databases

Database drivers run migrations. [Add a new database?](database/driver.go)

* [PostgreSQL](database/postgres)
* [Redshift](database/redshift)
* [Ql](database/ql)
* [Cassandra](database/cassandra)
* [SQLite](database/sqlite3) ([todo #165](https://github.com/mattes/migrate/issues/165))
* [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))
* [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))
* [Shell](database/shell) ([todo #171](https://github.com/mattes/migrate/issues/171))
* [Google Cloud Spanner](database/spanner)
* [CockroachDB](database/cockroachdb)
* [ClickHouse](database/clickhouse)

## Migration Sources

Source drivers read migrations from local or remote sources. [Add a new source?](source/driver.go)

* [Filesystem](source/file) - read from fileystem
* [Go-Bindata](source/go_bindata) - read from embedded binary data ([jteeuwen/go-bindata](https://github.com/jteeuwen/go-bindata))
* [Github](source/github) - read from remote Github repositories
* [AWS S3](source/aws_s3) - read from Amazon Web Services S3
* [Google Cloud Storage](source/google_cloud_storage) - read from Google Cloud Platform Storage

## CLI usage

* Simple wrapper around this library.
* Handles ctrl+c (SIGINT) gracefully.
* No config search paths, no config files, no magic ENV var injections.

__[CLI Documentation](cli)__

### Basic usage:

```
$ migrate -database postgres://localhost:5432/database up 2
```

### Docker usage

```
$ docker run -v {{ migration dir }}:/migrations --network host migrate/migrate
-path=/migrations/ -database postgres://localhost:5432/database up 2
```

## Use in your Go project

* API is stable and frozen for this release (v3.x).
* Uses [dep](https://github.com/golang/dep) to manage dependencies
* To help prevent database corruptions, it supports graceful stops via `GracefulStop chan bool`.
* Bring your own logger.
* Uses `io.Reader` streams internally for low memory overhead.
* Thread-safe and no goroutine leaks.

__[Go Documentation](https://godoc.org/github.com/golang-migrate/migrate)__

```go
import (
"github.com/golang-migrate/migrate"
_ "github.com/golang-migrate/migrate/database/postgres"
_ "github.com/golang-migrate/migrate/source/github"
)

func main() {
m, err := migrate.New(
"github://mattes:personal-access-token@mattes/migrate_test",
"postgres://localhost:5432/database?sslmode=enable")
m.Steps(2)
}
```

Want to use an existing database client?

```go
import (
"database/sql"
_ "github.com/lib/pq"
"github.com/golang-migrate/migrate"
"github.com/golang-migrate/migrate/database/postgres"
_ "github.com/golang-migrate/migrate/source/file"
)

func main() {
db, err := sql.Open("postgres", "postgres://localhost:5432/database?sslmode=enable")
driver, err := postgres.WithInstance(db, &postgres.Config{})
m, err := migrate.NewWithDatabaseInstance(
"file:///migrations",
"postgres", driver)
m.Steps(2)
}
```

## Migration files

Each migration has an up and down migration. [Why?](FAQ.md#why-two-separate-files-up-and-down-for-a-migration)

```
1481574547_create_users_table.up.sql
1481574547_create_users_table.down.sql
```

[Best practices: How to write migrations.](MIGRATIONS.md)

## Development and Contributing

Yes, please! [`Makefile`](Makefile) is your friend,
read the [development guide](CONTRIBUTING.md).

Also have a look at the [FAQ](FAQ.md).

---

Looking for alternatives? [https://awesome-go.com/#database](https://awesome-go.com/#database).