mirror of https://github.com/status-im/migrate.git
126 lines
3.5 KiB
Markdown
126 lines
3.5 KiB
Markdown
# migrate
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[](https://travis-ci.org/mattes/migrate)
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[](https://godoc.org/github.com/mattes/migrate)
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Database migrations written in Go. Use as CLI or import as library.
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```
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go get -u -tags 'postgres' -o migrate github.com/mattes/migrate/cli
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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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)
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```
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## Databases
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Database drivers are responsible for applying migrations to databases.
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Implementing a new database driver is easy. Just implement [database/driver interface](database/driver.go)
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* [PostgreSQL](database/postgres)
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* [Cassandra](database/cassandra)
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* [SQLite](database/sqlite)
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* [MySQL/ MariaDB](database/mysql)
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* [Neo4j](database/neo4j)
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* [Ql](database/ql)
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* [MongoDB](database/mongodb)
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* [CrateDB](database/crate)
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* [Shell](database/shell)
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## Migration Sources
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Source Drivers read migrations from various locations. Implementing a new source driver
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is easy. Just implement the [source/driver interface](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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```
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# dowload, build and install the CLI tool
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# -tags takes database and source drivers and will only build those
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$ go get -u -tags 'postgres' -o migrate github.com/mattes/migrate/cli
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$ migrate -help
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Usage: migrate OPTIONS COMMAND [arg...]
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migrate [ -version | -help ]
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Options:
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-source Location of the migrations (driver://url)
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-path Shorthand for -source=file://path
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-database Run migrations against this database (driver://url)
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-prefetch N Number of migrations to load in advance before executing (default 10)
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-verbose Print verbose logging
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-version Print version
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-help Print usage
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Commands:
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goto V Migrate to version V
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up [N] Apply all or N up migrations
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down [N] Apply all or N down migrations
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drop Drop everyting inside database
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version Print current migration version
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# so let's say you want to run the first two migrations
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migrate -database postgres://localhost:5432/database up 2
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# if your migrations are hosted on github
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migrate -source github://mattes:personal-access-token@mattes/migrate_test \
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-database postgres://localhost:5432/database down 2
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```
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## Use in your Go project
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```go
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import (
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"github.com/mattes/migrate/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("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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## Migration files
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Each migration version has an up and down 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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## Development and Testing
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Tests require Docker (for database driver testing).
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```
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make test-short DATABASE='postgres'
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make test
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```
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## Alternatives
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* https://bitbucket.org/liamstask/goose
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* https://github.com/tanel/dbmigrate
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* https://github.com/BurntSushi/migration
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* https://github.com/DavidHuie/gomigrate
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* https://github.com/rubenv/sql-migrate
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