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Capistrano 3.x tasks to upload shared config, per stage, that is stored outside of SCM (or not)

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Capistrano-Upload-Config

Gem Version

Upload, initialize and maintain configuration files for Capistrano 3.x outside of SCM. (or in SCM just different files for different stages - the choice is yours!)

Say you're working in a small team on a Rails app, you've got a couple of environments and you have a config/database.yml that's got some secrets that differ per stage in it. You'd like to maintain these secrets outside of source control but placing a config/database.yml on the server manually makes you nervous. What happens if it's lost? Did you upload the right one? Chaos. Stress. Sad face.

Capistrano-upload-config to the rescue. You can maintain a version of config/database.yml per stage, with different contents if you wish, keep these outside of your source control and still upload them without manual fiddling.

Equally this could be used to manage many other text based configuration files and used if you're in a team or not.

Installation

Add this line to your application's Gemfile:

gem 'capistrano', '~> 3.1.0'
gem 'capistrano-upload-config'

And then execute:

$ bundle

Or install it yourself as:

$ gem install capistrano-upload-config

Usage

Require the module in your Capfile:

require 'capistrano/upload-config'

capistrano-upload-config comes with 4 tasks:

  • config:check
  • config:init
  • config:push
  • config:pull

config:check

This task checks to see if all your set configuration files exist for the current stage:

$ cap staging config:check
 INFO Found: config/database.staging.yml
 WARN Not found: config/example.staging.yml

config:init

This creates the configured config files for the current stage if it doesn't already exist. Bonus: It copies from an example file if one exists.

$ cap staging config:init
 WARN Already Exists: config/database.staging.yml
 INFO Copied: config/example.yml-example to config/example.staging.yml
 Created: config/foobar.staging.yml as empty file

config:push

This task creates the config on the remote server.

$ cap staging config:push
 INFO Uploading config config/database.staging.yml as config/database.yml

Can be used during a deploy, If your :config_files and :linked_files are going to be the same I suggest hooking in before deploy:check:linked_files so that the shared directories have been created but the shared files not checked:

# add to config/deploy.rb

before 'deploy:check:linked_files', 'config:push'

config:pull

This task download the config from the remote server.

Can be used to get a freshly updated config file before edit on push it.

$ cap staging config:pull
INFO Downloading config config/database.yml as config/database.staging.yml
INFO Downloading config/database.staging.yml 100.0%

Configuration

Configurable options, shown here with defaults:

set :config_files, fetch(:linked_files)
set :config_example_suffix, '-example'
set :local_base_dir, ''

By default your :linked_files are assumed to be config files, this might be totally wrong for your environment, never fear just:

# in deploy.rb (or similar)

set :config_files, %w{dir1/config.toml config/example.ini hidden/secrets.json}

Note, capistrano-upload-config can only upload confir to your shared folder (and it's sub directories) so it's likely that :config_files will be a subset of :linked_files.

Example files

Do you use example files checked into your source control? e.g. config/database.yml-example These will be used when running config:init. If your suffix differs, e.g. config/database.yml.eg set this as:

# in deploy.rb (or similar)

set :config_example_suffix, '.eg'

Note, only suffixes (i.e. after the whole filename) are supported.

Use Stage Name Remotely

By default, capistrano-upload-config will remove the environment name from the file name for the server's version. Occasionally, you'll want the server's file name to reflect the local file's name.

# in deploy.rb

set :config_use_stage_remotely, true
set :config_files, [ ".env.php" ]

Running cap staging config:push will upload the remote file as .env.staging.php, rather than .env.php.

Local Base Dir

Using this option you can base your local config file/s in any directory, if unset they're assumed to be in the current directory tree.

# in deploy.rb

set :local_base_dir, '..'

For example Capistrano is outside of the application root and your config lives relative to the directory above.

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

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Capistrano 3.x tasks to upload shared config, per stage, that is stored outside of SCM (or not)

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