Missing gem dependency for activesupport

[wconrad]

The gem appears to require activesupport, but activesupport is not a dependency of tunemygc 1.0.69.

Given this program foo.rb:

ENV['RUBY_GC_SPY'] ||= 'manual'
require 'tunemygc'

TuneMyGc.booted
TuneMyGc.processing_started
TuneMyGc.processing_ended

Then running it generates this output, the last line of which is an error due to activesupport not being required:

$ RUBY_GC_TOKEN=(redacted) RUBY_GC_TUNE=200 bundle exec ruby foo.rb
[tunemygc] Rails not detected, loading minimal agent
I, [2017-10-28T09:53:52.687273 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] interposing
I, [2017-10-28T09:53:52.690374 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] hooked: GC tracepoints
I, [2017-10-28T09:53:52.691159 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] hooked: manual
I, [2017-10-28T09:53:52.691181 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] hooked: after_initialize
I, [2017-10-28T09:53:52.691195 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] hooked: at_exit
I, [2017-10-28T09:53:52.691205 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] interposed
I, [2017-10-28T09:53:52.691267 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] at_exit
I, [2017-10-28T09:53:52.691283 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] uninstalled manual spy
I, [2017-10-28T09:53:52.692316 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] Sync required? true
I, [2017-10-28T09:53:52.692340 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] Syncing 4 snapshots
I, [2017-10-28T09:53:52.693734 #10461]  INFO -- : [tunemygc, ppid: 17705, pid: 10461] Config recommendation error (uninitialized constant TuneMyGc::Syncer::ActiveSupport)

See the last line, having "uninitialized constant TuneMyGc::Syncer::ActiveSupport"

When the activesupport gem is included:

ENV['RUBY_GC_SPY'] ||= 'manual'
require 'tunemygc'
require 'active_support'

TuneMyGc.booted
TuneMyGc.processing_started
TuneMyGc.processing_ended

Then the "unitialized constant" error no longer appears:

$ RUBY_GC_TOKEN=(redacted) RUBY_GC_TUNE=200 bundle exec ruby foo.rb
[tunemygc] Rails not detected, loading minimal agent
I, [2017-10-28T09:55:58.529386 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] interposing
I, [2017-10-28T09:55:58.532564 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] hooked: GC tracepoints
I, [2017-10-28T09:55:58.533370 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] hooked: manual
I, [2017-10-28T09:55:58.533391 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] hooked: after_initialize
I, [2017-10-28T09:55:58.533405 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] hooked: at_exit
I, [2017-10-28T09:55:58.533417 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] interposed
I, [2017-10-28T09:55:58.568350 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] at_exit
I, [2017-10-28T09:55:58.568387 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] uninstalled manual spy
I, [2017-10-28T09:55:58.569838 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] Sync required? true
I, [2017-10-28T09:55:58.569863 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] Syncing 10 snapshots
I, [2017-10-28T09:55:59.192253 #10472]  INFO -- : [tunemygc, ppid: 17705, pid: 10472] Ruby version 2.4.2 or Rails version 0.0 not supported. Failed to sync 10 snapshots

(I'll create a separate issue for the error message, "Ruby version 2.4.2 or Rails version 0.0 not supported")

Additional info

Gemfile:

# frozen_string_literal: true
source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }

gem "activesupport"
gem "tunemygc"

Gemfile.lock:

GEM
  remote: https://rubygems.org/
  specs:
    activesupport (5.0.6)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (~> 0.7)
      minitest (~> 5.1)
      tzinfo (~> 1.1)
    concurrent-ruby (1.0.5)
    i18n (0.9.0)
      concurrent-ruby (~> 1.0)
    minitest (5.10.3)
    thread_safe (0.3.6)
    tunemygc (1.0.69)
    tzinfo (1.2.3)
      thread_safe (~> 0.1)

PLATFORMS
  ruby

DEPENDENCIES
  activesupport
  tunemygc

BUNDLED WITH
   1.15.4

Ruby version: ruby-2.4.2