Immigration NPM

Immigration

Simple, no-frills migration utility.

Installation

npm install -g immigration

Usage

From immigration --help:

immigration [command] [options]

Options:
  -d, --directory [dir]  The path to migration scripts
  -b, --begin [name]     First script to begin on
  -c, --count [num]      The number of migrations to execute (default: all)
  -e, --extension [ext]  Supported file extensions (default: ".js")
  -a, --all              Explicitly execute all migrations (execute without count or begin)
  -n, --new              Execute the new migrations (used for "up" migrations) *
  -s, --since            Rollback migrations for duration (E.g. "30m") (used for "down" migrations) *

Commands:
  up [name]       Run up migration scripts
  down [name]     Run down migration scripts
  create [title]  Create a new migration file
  list            List available migrations
  executed        List the run migrations *
  log [name]      Mark a migration as run (without explicitly executing up) *
  unlog [name]    Remove a migration marked as run (without explicitly executing down) *
  tidy            Unlog unknown migration names *

* Requires adapter (E.g. "--use [ immigration/fs ]")

Migrations can export two functions: up and down. These functions can accept a callback or return a promise for asynchronous actions, such as altering a database.

Adapters

Adapters can be used with immigration for persistence of migration state. The built-in adapter is fs, but others can be created. The only requirement is that they export function called init which, when called, returns an object with isLocked, executed, lock, unlock, log and unlog functions.