144 lines
4.9 KiB
Markdown
144 lines
4.9 KiB
Markdown
[](https://travis-ci.org/mattes/migrate)
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[](https://godoc.org/github.com/mattes/migrate)
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[](https://coveralls.io/github/mattes/migrate?branch=v3.0-prev)
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[](https://packagecloud.io/mattes/migrate?filter=debs)
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# migrate
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__Database migrations written in Go. Use as [CLI](#cli-usage) or import as [library](#use-in-your-go-project).__
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* Migrate reads migrations from [sources](#migration-sources)
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and applies them in correct order to a [database](#databases).
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* Drivers are "dumb", migrate glues everything together and makes sure the logic is bulletproof.
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(Keeps the drivers lightweight, too.)
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* Database drivers don't assume things or try to correct user input. When in doubt, fail.
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Looking for [v1](https://github.com/mattes/migrate/tree/v1)?
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## Databases
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Database drivers run migrations. [Add a new database?](database/driver.go)
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* [PostgreSQL](database/postgres)
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* [Redshift](database/redshift)
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* [Ql](database/ql)
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* [Cassandra](database/cassandra) ([todo #164](https://github.com/mattes/migrate/issues/164))
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* [SQLite](database/sqlite) ([todo #165](https://github.com/mattes/migrate/issues/165))
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* [MySQL/ MariaDB](database/mysql)
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* [Neo4j](database/neo4j) ([todo #167](https://github.com/mattes/migrate/issues/167))
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* [MongoDB](database/mongodb) ([todo #169](https://github.com/mattes/migrate/issues/169))
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* [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))
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* [Shell](database/shell) ([todo #171](https://github.com/mattes/migrate/issues/171))
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* [Google Cloud Spanner](database/spanner) ([todo #172](https://github.com/mattes/migrate/issues/172))
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## Migration Sources
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Source drivers read migrations from local or remote sources. [Add a new source?](source/driver.go)
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* [Filesystem](source/file) - read from fileystem (always included)
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* [Go-Bindata](source/go-bindata) - read from embedded binary data ([jteeuwen/go-bindata](https://github.com/jteeuwen/go-bindata))
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* [Github](source/github) - read from remote Github repositories
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* [AWS S3](source/aws-s3) - read from Amazon Web Services S3
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* [Google Cloud Storage](source/google-cloud-storage) - read from Google Cloud Platform Storage
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## CLI usage
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* Simple wrapper around this library.
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* Handles ctrl+c (SIGINT) gracefully.
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* No config search paths, no config files, no magic ENV var injections.
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__[CLI Documentation](cli)__
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([brew todo #156](https://github.com/mattes/migrate/issues/156))
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```
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$ brew install migrate --with-postgres
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$ migrate -database postgres://localhost:5432/database up 2
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```
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## Use in your Go project
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* API is stable and frozen for this release (v3.x).
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* Package migrate has no external dependencies.
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* Only import the drivers you need.
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(check [dependency_tree.txt](https://github.com/mattes/migrate/releases) for each driver)
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* To help prevent database corruptions, it supports graceful stops via `GracefulStop chan bool`.
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* Bring your own logger.
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* Uses `io.Reader` streams internally for low memory overhead.
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* Thread-safe and no goroutine leaks.
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__[Go Documentation](https://godoc.org/github.com/mattes/migrate)__
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```go
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import (
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"github.com/mattes/migrate"
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_ "github.com/mattes/migrate/database/postgres"
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_ "github.com/mattes/migrate/source/github"
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)
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func main() {
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m, err := migrate.New(
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"github://mattes:personal-access-token@mattes/migrate_test",
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"postgres://localhost:5432/database?sslmode=enable")
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m.Steps(2)
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}
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```
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Want to use an existing database client?
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```go
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import (
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"database/sql"
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_ "github.com/lib/pq"
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"github.com/mattes/migrate"
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"github.com/mattes/migrate/database/postgres"
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_ "github.com/mattes/migrate/source/file"
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)
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func main() {
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db, err := sql.Open("postgres", "postgres://localhost:5432/database?sslmode=enable")
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driver, err := postgres.WithInstance(db, &postgres.Config{})
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m, err := migrate.NewWithDatabaseInstance(
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"file:///migrations",
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"postgres", driver)
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m.Steps(2)
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}
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```
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## Migration files
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Each migration has an up and down migration. [Why?](FAQ.md#why-two-separate-files-up-and-down-for-a-migration)
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```
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1481574547_create_users_table.up.sql
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1481574547_create_users_table.down.sql
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```
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[Best practices: How to write migrations.](MIGRATIONS.md)
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## Development and Contributing
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Yes, please! [`Makefile`](Makefile) is your friend,
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read the [development guide](CONTRIBUTING.md).
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Also have a look at the [FAQ](FAQ.md).
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---
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__Alternatives__
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https://bitbucket.org/liamstask/goose, https://github.com/tanel/dbmigrate,
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https://github.com/BurntSushi/migration, https://github.com/DavidHuie/gomigrate,
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https://github.com/rubenv/sql-migrate
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