aboutsummaryrefslogtreecommitdiff
path: root/lib/terraform_working_directory.rb
blob: 6c2e25fdef00043f53355cff5ace14584a49c40d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
# GOV.UK Mini Environment Admin
# Copyright © 2018  Christopher Baines <mail@cbaines.net>
#
# This file is part of the GOV.UK Mini Environment Admin.
#
# The GOV.UK Mini Environment Admin is free software: you can
# redistribute it and/or modify it under the terms of the GNU Affero
# General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later
# version.
#
# The GOV.UK Mini Environment Admin is distributed in the hope that it
# will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with the GOV.UK Mini Environment Admin.  If not, see
# <http://www.gnu.org/licenses/>.

require 'fileutils'

class TerraformWorkingDirectory
  def initialize(id, source)
    @id = id
    @source = source
  end

  def working_directory
    "tmp/terraform-working-directories/#{@id}"
  end

  def within_working_directory
    if Rails.env.development? && Dir.exist?(working_directory)
      # For the purposes of development, always clear the working
      # directory. This ensures that fresh terraform configuration
      # will be copied over
      FileUtils.remove_dir(working_directory)
    end

    source = File.expand_path(@source)
    FileUtils.mkdir_p working_directory

    Dir.chdir(working_directory) do
      if Dir.empty?('.')
        credentials = TerraformHttpBackendController.credentials

        RubyTerraform.init(
          backend: true,
          from_module: source,
          backend_config: {
            address: terraform_backend_address,
            username: credentials[:name],
            password: credentials[:password]
          },
          plugin_dir: terraform_plugin_dir
        )
      end

      yield
    end
  end

  def terraform_backend_address
    (
      Plek.new.external_url_for('mini-environment-admin') +
      Rails
        .application
        .routes
        .url_helpers
        .terraform_http_backend_path(@id)
    )
  end

  def terraform_plugin_dir
    ENV['PATH'].split(':').first
  end
end