Add new Settings gem.

Author: Eric-Guo

.gitignore

@@ -40,3 +40,7 @@ rails-starter.sublime-workspace
 /yarn-error.log
 yarn-debug.log*
 .yarn-integrity
+
+config/settings.local.yml
+config/settings/*.local.yml
+config/environments/*.local.yml

Gemfile

@@ -27,6 +27,8 @@ gem "devise-i18n"
 
 gem "meta-tags"
 
+gem "config"
+
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: %i[mingw mswin x64_mingw jruby]
 

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://git.thape.com.cn/rails/rails.git
-  revision: ec9bed721be70c8deca5a57d3240c3a1d60f5622
+  revision: a9e2f8440f1a532872b6039ff296df64465994c1
   branch: eric_read
   specs:
     actioncable (7.1.0.alpha)
@@ -133,12 +133,16 @@ GEM
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
     concurrent-ruby (1.2.0)
+    config (4.1.0)
+      deep_merge (~> 1.2, >= 1.2.1)
+      dry-validation (~> 1.0, >= 1.0.0)
     connection_pool (2.3.0)
     crass (1.0.6)
     date (3.3.3)
     debug (1.7.1)
       irb (>= 1.5.0)
       reline (>= 0.3.1)
+    deep_merge (1.2.2)
     devise (4.9.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -147,6 +151,38 @@ GEM
       warden (~> 1.2.3)
     devise-i18n (1.11.0)
       devise (>= 4.9.0)
+    dry-configurable (1.0.1)
+      dry-core (~> 1.0, < 2)
+      zeitwerk (~> 2.6)
+    dry-core (1.0.0)
+      concurrent-ruby (~> 1.0)
+      zeitwerk (~> 2.6)
+    dry-inflector (1.0.0)
+    dry-initializer (3.1.1)
+    dry-logic (1.5.0)
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 1.0, < 2)
+      zeitwerk (~> 2.6)
+    dry-schema (1.13.0)
+      concurrent-ruby (~> 1.0)
+      dry-configurable (~> 1.0, >= 1.0.1)
+      dry-core (~> 1.0, < 2)
+      dry-initializer (~> 3.0)
+      dry-logic (>= 1.5, < 2)
+      dry-types (>= 1.7, < 2)
+      zeitwerk (~> 2.6)
+    dry-types (1.7.1)
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 1.0)
+      dry-inflector (~> 1.0)
+      dry-logic (~> 1.4)
+      zeitwerk (~> 2.6)
+    dry-validation (1.10.0)
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 1.0, < 2)
+      dry-initializer (~> 3.0)
+      dry-schema (>= 1.12, < 2)
+      zeitwerk (~> 2.6)
     ed25519 (1.3.0)
     erubi (1.12.0)
     globalid (1.1.0)
@@ -302,6 +338,7 @@ DEPENDENCIES
   capistrano-rbenv
   capistrano3-puma (>= 6.0.0.beta.1)
   capybara
+  config
   debug
   devise
   devise-i18n

config/initializers/config.rb

@@ -0,0 +1,58 @@
+Config.setup do |config|
+  # Name of the constant exposing loaded settings
+  config.const_name = 'Settings'
+
+  # Ability to remove elements of the array set in earlier loaded settings file. For example value: '--'.
+  #
+  # config.knockout_prefix = nil
+
+  # Overwrite an existing value when merging a `nil` value.
+  # When set to `false`, the existing value is retained after merge.
+  #
+  # config.merge_nil_values = true
+
+  # Overwrite arrays found in previously loaded settings file. When set to `false`, arrays will be merged.
+  #
+  # config.overwrite_arrays = true
+
+  # Load environment variables from the `ENV` object and override any settings defined in files.
+  #
+  # config.use_env = false
+
+  # Define ENV variable prefix deciding which variables to load into config.
+  #
+  # Reading variables from ENV is case-sensitive. If you define lowercase value below, ensure your ENV variables are
+  # prefixed in the same way.
+  #
+  # When not set it defaults to `config.const_name`.
+  #
+  config.env_prefix = 'SETTINGS'
+
+  # What string to use as level separator for settings loaded from ENV variables. Default value of '.' works well
+  # with Heroku, but you might want to change it for example for '__' to easy override settings from command line, where
+  # using dots in variable names might not be allowed (eg. Bash).
+  #
+  # config.env_separator = '.'
+
+  # Ability to process variables names:
+  #   * nil  - no change
+  #   * :downcase - convert to lower case
+  #
+  # config.env_converter = :downcase
+
+  # Parse numeric values as integers instead of strings.
+  #
+  # config.env_parse_values = true
+
+  # Validate presence and type of specific config values. Check https://github.com/dry-rb/dry-validation for details.
+  #
+  # config.schema do
+  #   required(:name).filled
+  #   required(:age).maybe(:int?)
+  #   required(:email).filled(format?: EMAIL_REGEX)
+  # end
+
+  # Evaluate ERB in YAML config files at load time.
+  #
+  # config.evaluate_erb_in_yaml = true
+end