Fix: RuntimeError: Don't know how to build task 'db:migrate'

[onk]

ActiveRecord's migrate tasks are required since v2.7.5 (#588).

How to reproduce

1. create non-rails project (like sinatra)

./
├── app.rb
├── Gemfile
├── Gemfile.lock
└── models/
└── user.rb

# Gemfilesource"https://rubygems.org"gem"activerecord",require: "active_record"gem"annotate"gem"sqlite3"

# app.rbBundler.require(:default)ActiveRecord::Base.establish_connection(adapter: 'sqlite3',database: ':memory:')ActiveRecord::Schema.definedocreate_table:users,force: truedo |t|
endendDir["models/*.rb"].sort.each{|f| require_relativef}

# models/user.rbclassUser < ActiveRecord::Baseend

2. execute annotate

$ bundle exec annotate -R ./app.rb --models --model-dir models

Expected behavior

$ bundle exec annotate -R ./app.rb --models --model-dir models
-- create_table(:users, {:force=>true})
-> 0.0025s
Annotated (1): models/user.rb

$ cat models/user.rb
# == Schema Information## Table name: users## id :integer not null, primary key#
class User < ActiveRecord::Base
end

Actual behavior

$ bundle exec annotate -R ./app.rb --models --model-dir models
bundler: failed to load command: annotate (/Users/onaka/.bundle/ruby/3.0.0/bin/annotate)
RuntimeError: Don't know how to build task 'db:migrate' (See the list of available tasks with `rake --tasks`)
/Users/onaka/.bundle/ruby/3.0.0/gems/rake-13.0.1/lib/rake/task_manager.rb:59:in `[]'
/Users/onaka/.bundle/ruby/3.0.0/gems/rake-13.0.1/lib/rake/task.rb:405:in `[]'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/tasks/annotate_models_migrate.rake:8:in `block in <top (required)>'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/tasks/annotate_models_migrate.rake:7:in `each'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/tasks/annotate_models_migrate.rake:7:in `<top (required)>'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/annotate.rb:78:in `load'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/annotate.rb:78:in `block in load_tasks'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/annotate.rb:77:in `each'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/annotate.rb:77:in `load_tasks'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/lib/annotate.rb:133:in `bootstrap_rake'
/Users/onaka/.bundle/ruby/3.0.0/gems/annotate-3.1.1/bin/annotate:20:in `<top (required)>'
/Users/onaka/.bundle/ruby/3.0.0/bin/annotate:23:in `load'
/Users/onaka/.bundle/ruby/3.0.0/bin/annotate:23:in `<top (required)>'

[masa-iwasaki]

I got simillar errors in one of my projects and this PR solved the errors.

@ctran I would appreciate if this PR got merged and released.