# install
go get github.com/mattes/migrate

# create new migration
migrate -url="postgres://user@host:port/database" -path="./db/migrations" create

# apply all *up* migrations
migrate -url="postgres://user@host:port/database" -path="./db/migrations" up

# apply all *down* migrations
migrate -url="postgres://user@host:port/database" -path="./db/migrations" down

# roll back the most recently applied migration, then run it again.
migrate -url="postgres://user@host:port/database" -path="./db/migrations" redo

# down and up again
migrate -url="postgres://user@host:port/database" -path="./db/migrations" reset

# show current migration version
migrate -url="postgres://user@host:port/database" -path="./db/migrations" version

# apply the next n migrations
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate +1
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate +2
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate +n

# apply the *down* migration of the current version 
# and the previous n-1 migrations
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate -1
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate -2
migrate -url="postgres://user@host:port/database" -path="./db/migrations" migrate -n

Usage from within Go

See http://godoc.org/github.com/mattes/migrate/migrate

import "github.com/mattes/migrate/migrate"


migrate.Up("postgres://user@host:port/database", "./db/migrations")
// ... 
// ...

Migrations format

./db/migrations/001_initial.up.sql
./db/migrations/001_initial.down.sql

Why two files? This way you could do sth like psql -f ./db/migrations/001_initial.up.sql.

Credits

https://bitbucket.org/liamstask/goose