CODEWITHSUNDEEP
ruby-on-railsrubybashrakebundle
John Cleary
John Cleary

Reputation: 987

rake task to perform bundle install in another project

How can I write a rake task to run a bundle install in a different project? I have create a project with just rake, and written tasks like this

task :bundle do
  projects.each do |name, repo|
    if Dir.exists?("../#{name}")
      exec("cd ../#{name} && bin/bundle install")
    end
  end
end

But when I run this I get:

Using rake 10.3.2
Using bundler 1.9.6
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.

Which looks ok at first, but is in fact the bundle install for the current rake-only project and not the target rails project.

I also tried back ticks

puts `cd ../#{name} && bin/bundle install`

But it did the same. I also tried just bundle install instead of bin/bundle install, but it didn't work.

When I run it on the command like directly it does what I expect:

Using rake 10.4.2
Using CFPropertyList 2.3.1
...
...
Using turbolinks 2.5.3
Using uglifier 2.7.1
Bundle complete! 34 Gemfile dependencies, 120 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.

How do I get it to do the right bundle install ?

Upvotes: 2

Views: 2036

Answers (1)

user5067463
user5067463

Reputation:

Couple of things to note on this

bin/bundle will only work if the bundle files exists in in bin directory

  • there are number of different methods to execute commands in a shell
    • exec('echo "Hello World"') - runs the command and replaces the current process with it.
    • system('echo "Hello World"') - runs the command in a subshell and captures the exit status code
    • `echo "hello world"` - runs the command in a subshell and captures all output to the STDOUT and STDERR but not the exit status code.

To the why it didn't work

You need to provide bundler with a clean environment so it knows that you are bundling a different project. surround the commands within your rake task with Bundler.with_clean_env block as per below

task :bundle do
  Bundler.with_clean_env do
    projects.each do |name, repo|
      if Dir.exists?("../#{name}")
        exec("cd ../#{name} && bundle install")
      end
    end
  end
end

Upvotes: 5

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