////
  Do NOT edit this file by hand directly, as it is automatically generated.

  Please make any necessary changes to the cop documentation within the source files themselves.
////

= Gemspec

[#gemspecaddruntimedependency]
== Gemspec/AddRuntimeDependency

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Pending
| Yes
| Always
| 1.65
| -
|===

Prefer `add_dependency` over `add_runtime_dependency` as the latter is
considered soft-deprecated.

[#examples-gemspecaddruntimedependency]
=== Examples

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  spec.add_runtime_dependency('rubocop')
end

# good
Gem::Specification.new do |spec|
  spec.add_dependency('rubocop')
end
----

[#configurable-attributes-gemspecaddruntimedependency]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Include
| `+**/*.gemspec+`
| Array
|===

[#references-gemspecaddruntimedependency]
=== References

* https://rubystyle.guide#add_dependency_vs_add_runtime_dependency
* https://github.com/ruby/rubygems/issues/7799#issuecomment-2192720316

[#gemspecattributeassignment]
== Gemspec/AttributeAssignment

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Pending
| Yes
| No
| 1.77
| -
|===

Use consistent style for Gemspec attributes assignment.

[#examples-gemspecattributeassignment]
=== Examples

[source,ruby]
----
# bad
# This example uses two styles for assignment of metadata attribute.
Gem::Specification.new do |spec|
  spec.metadata = { 'key' => 'value' }
  spec.metadata['another-key'] = 'another-value'
end

# good
Gem::Specification.new do |spec|
  spec.metadata['key'] = 'value'
  spec.metadata['another-key'] = 'another-value'
end

# good
Gem::Specification.new do |spec|
  spec.metadata = { 'key' => 'value', 'another-key' => 'another-value' }
end

# bad
# This example uses two styles for assignment of authors attribute.
Gem::Specification.new do |spec|
  spec.authors = %w[author-0 author-1]
  spec.authors[2] = 'author-2'
end

# good
Gem::Specification.new do |spec|
  spec.authors = %w[author-0 author-1 author-2]
end

# good
Gem::Specification.new do |spec|
  spec.authors[0] = 'author-0'
  spec.authors[1] = 'author-1'
  spec.authors[2] = 'author-2'
end

# good
# This example uses consistent assignment per attribute,
# even though two different styles are used overall.
Gem::Specification.new do |spec|
  spec.metadata = { 'key' => 'value' }
  spec.authors[0] = 'author-0'
  spec.authors[1] = 'author-1'
  spec.authors[2] = 'author-2'
end
----

[#configurable-attributes-gemspecattributeassignment]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Include
| `+**/*.gemspec+`
| Array
|===

[#gemspecdependencyversion]
== Gemspec/DependencyVersion

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Disabled
| Yes
| No
| 1.29
| -
|===

Enforce that gem dependency version specifications or a commit reference (branch,
ref, or tag) are either required or forbidden.

[#examples-gemspecdependencyversion]
=== Examples

[#enforcedstyle_-required-_default_-gemspecdependencyversion]
==== EnforcedStyle: required (default)

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  spec.add_dependency 'parser'
end

# bad
Gem::Specification.new do |spec|
  spec.add_development_dependency 'parser'
end

# good
Gem::Specification.new do |spec|
  spec.add_dependency 'parser', '>= 2.3.3.1', '< 3.0'
end

# good
Gem::Specification.new do |spec|
  spec.add_development_dependency 'parser', '>= 2.3.3.1', '< 3.0'
end
----

[#enforcedstyle_-forbidden-gemspecdependencyversion]
==== EnforcedStyle: forbidden

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  spec.add_dependency 'parser', '>= 2.3.3.1', '< 3.0'
end

# bad
Gem::Specification.new do |spec|
  spec.add_development_dependency 'parser', '>= 2.3.3.1', '< 3.0'
end

# good
Gem::Specification.new do |spec|
  spec.add_dependency 'parser'
end

# good
Gem::Specification.new do |spec|
  spec.add_development_dependency 'parser'
end
----

[#configurable-attributes-gemspecdependencyversion]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| EnforcedStyle
| `required`
| `required`, `forbidden`

| Include
| `+**/*.gemspec+`
| Array

| AllowedGems
| `[]`
| Array
|===

[#gemspecdeprecatedattributeassignment]
== Gemspec/DeprecatedAttributeAssignment

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Pending
| Yes
| Always
| 1.30
| 1.40
|===

Checks that deprecated attributes are not set in a gemspec file.
Removing deprecated attributes allows the user to receive smaller packed gems.

[#examples-gemspecdeprecatedattributeassignment]
=== Examples

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  spec.name = 'your_cool_gem_name'
  spec.test_files = Dir.glob('test/**/*')
end

# bad
Gem::Specification.new do |spec|
  spec.name = 'your_cool_gem_name'
  spec.test_files += Dir.glob('test/**/*')
end

# good
Gem::Specification.new do |spec|
  spec.name = 'your_cool_gem_name'
end
----

[#configurable-attributes-gemspecdeprecatedattributeassignment]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Severity
| `warning`
| String

| Include
| `+**/*.gemspec+`
| Array
|===

[#gemspecdevelopmentdependencies]
== Gemspec/DevelopmentDependencies

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Pending
| Yes
| No
| 1.44
| -
|===

Enforce that development dependencies for a gem are specified in
`Gemfile`, rather than in the `gemspec` using
`add_development_dependency`. Alternatively, using `EnforcedStyle:
gemspec`, enforce that all dependencies are specified in `gemspec`,
rather than in `Gemfile`.

[#examples-gemspecdevelopmentdependencies]
=== Examples

[#enforcedstyle_-gemfile-_default_-gemspecdevelopmentdependencies]
==== EnforcedStyle: Gemfile (default)

[source,ruby]
----
# Specify runtime dependencies in your gemspec,
# but all other dependencies in your Gemfile.

# bad
# example.gemspec
s.add_development_dependency "foo"

# good
# Gemfile
gem "foo"

# good
# gems.rb
gem "foo"

# good (with AllowedGems: ["bar"])
# example.gemspec
s.add_development_dependency "bar"
----

[#enforcedstyle_-gems_rb-gemspecdevelopmentdependencies]
==== EnforcedStyle: gems.rb

[source,ruby]
----
# Specify runtime dependencies in your gemspec,
# but all other dependencies in your Gemfile.
#
# Identical to `EnforcedStyle: Gemfile`, but with a different error message.
# Rely on Bundler/GemFilename to enforce the use of `Gemfile` vs `gems.rb`.

# bad
# example.gemspec
s.add_development_dependency "foo"

# good
# Gemfile
gem "foo"

# good
# gems.rb
gem "foo"

# good (with AllowedGems: ["bar"])
# example.gemspec
s.add_development_dependency "bar"
----

[#enforcedstyle_-gemspec-gemspecdevelopmentdependencies]
==== EnforcedStyle: gemspec

[source,ruby]
----
# Specify all dependencies in your gemspec.

# bad
# Gemfile
gem "foo"

# good
# example.gemspec
s.add_development_dependency "foo"

# good (with AllowedGems: ["bar"])
# Gemfile
gem "bar"
----

[#configurable-attributes-gemspecdevelopmentdependencies]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| EnforcedStyle
| `Gemfile`
| `Gemfile`, `gems.rb`, `gemspec`

| AllowedGems
| `[]`
| Array

| Include
| `+**/*.gemspec+`, `+**/Gemfile+`, `+**/gems.rb+`
| Array
|===

[#gemspecduplicatedassignment]
== Gemspec/DuplicatedAssignment

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Enabled
| Yes
| No
| 0.52
| 1.40
|===

An attribute assignment method call should be listed only once
in a gemspec.

Assigning to an attribute with the same name using `spec.foo =` or
`spec.attribute#[]=` will be an unintended usage. On the other hand,
duplication of methods such as `spec.requirements`,
`spec.add_runtime_dependency`, and others are permitted because it is
the intended use of appending values.

[#examples-gemspecduplicatedassignment]
=== Examples

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  spec.name = 'rubocop'
  spec.name = 'rubocop2'
end

# good
Gem::Specification.new do |spec|
  spec.name = 'rubocop'
end

# good
Gem::Specification.new do |spec|
  spec.requirements << 'libmagick, v6.0'
  spec.requirements << 'A good graphics card'
end

# good
Gem::Specification.new do |spec|
  spec.add_dependency('parallel', '~> 1.10')
  spec.add_dependency('parser', '>= 2.3.3.1', '< 3.0')
end

# bad
Gem::Specification.new do |spec|
  spec.metadata["key"] = "value"
  spec.metadata["key"] = "value"
end

# good
Gem::Specification.new do |spec|
  spec.metadata["key"] = "value"
end
----

[#configurable-attributes-gemspecduplicatedassignment]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Severity
| `warning`
| String

| Include
| `+**/*.gemspec+`
| Array
|===

[#gemspecordereddependencies]
== Gemspec/OrderedDependencies

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Enabled
| Yes
| Always
| 0.51
| -
|===

Dependencies in the gemspec should be alphabetically sorted.

[#examples-gemspecordereddependencies]
=== Examples

[source,ruby]
----
# bad
spec.add_dependency 'rubocop'
spec.add_dependency 'rspec'

# good
spec.add_dependency 'rspec'
spec.add_dependency 'rubocop'

# good
spec.add_dependency 'rubocop'

spec.add_dependency 'rspec'

# bad
spec.add_development_dependency 'rubocop'
spec.add_development_dependency 'rspec'

# good
spec.add_development_dependency 'rspec'
spec.add_development_dependency 'rubocop'

# good
spec.add_development_dependency 'rubocop'

spec.add_development_dependency 'rspec'

# bad
spec.add_runtime_dependency 'rubocop'
spec.add_runtime_dependency 'rspec'

# good
spec.add_runtime_dependency 'rspec'
spec.add_runtime_dependency 'rubocop'

# good
spec.add_runtime_dependency 'rubocop'

spec.add_runtime_dependency 'rspec'
----

[#treatcommentsasgroupseparators_-true-_default_-gemspecordereddependencies]
==== TreatCommentsAsGroupSeparators: true (default)

[source,ruby]
----
# good
# For code quality
spec.add_dependency 'rubocop'
# For tests
spec.add_dependency 'rspec'
----

[#treatcommentsasgroupseparators_-false-gemspecordereddependencies]
==== TreatCommentsAsGroupSeparators: false

[source,ruby]
----
# bad
# For code quality
spec.add_dependency 'rubocop'
# For tests
spec.add_dependency 'rspec'
----

[#configurable-attributes-gemspecordereddependencies]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| TreatCommentsAsGroupSeparators
| `true`
| Boolean

| ConsiderPunctuation
| `false`
| Boolean

| Include
| `+**/*.gemspec+`
| Array
|===

[#gemspecrequiremfa]
== Gemspec/RequireMFA

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Pending
| Yes
| Always
| 1.23
| 1.40
|===

Requires a gemspec to have `rubygems_mfa_required` metadata set.

This setting tells RubyGems that MFA (Multi-Factor Authentication) is
required for accounts to be able to perform privileged operations, such as
(see RubyGems' documentation for the full list of privileged
operations):

* `gem push`
* `gem yank`
* `gem owner --add/remove`
* adding or removing owners using gem ownership page

This helps make your gem more secure, as users can be more
confident that gem updates were pushed by maintainers.

[#examples-gemspecrequiremfa]
=== Examples

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  # no `rubygems_mfa_required` metadata specified
end

# good
Gem::Specification.new do |spec|
  spec.metadata = {
    'rubygems_mfa_required' => 'true'
  }
end

# good
Gem::Specification.new do |spec|
  spec.metadata['rubygems_mfa_required'] = 'true'
end

# bad
Gem::Specification.new do |spec|
  spec.metadata = {
    'rubygems_mfa_required' => 'false'
  }
end

# good
Gem::Specification.new do |spec|
  spec.metadata = {
    'rubygems_mfa_required' => 'true'
  }
end

# bad
Gem::Specification.new do |spec|
  spec.metadata['rubygems_mfa_required'] = 'false'
end

# good
Gem::Specification.new do |spec|
  spec.metadata['rubygems_mfa_required'] = 'true'
end
----

[#configurable-attributes-gemspecrequiremfa]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Severity
| `warning`
| String

| Include
| `+**/*.gemspec+`
| Array
|===

[#references-gemspecrequiremfa]
=== References

* https://guides.rubygems.org/mfa-requirement-opt-in/

[#gemspecrequiredrubyversion]
== Gemspec/RequiredRubyVersion

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Enabled
| Yes
| No
| 0.52
| 1.40
|===

Checks that `required_ruby_version` in a gemspec file is set to a valid
value (non-blank) and matches `TargetRubyVersion` as set in RuboCop's
configuration for the gem.

This ensures that RuboCop is using the same Ruby version as the gem.

[#examples-gemspecrequiredrubyversion]
=== Examples

[source,ruby]
----
# When `TargetRubyVersion` of .rubocop.yml is `2.5`.

# bad
Gem::Specification.new do |spec|
  # no `required_ruby_version` specified
end

# bad
Gem::Specification.new do |spec|
  spec.required_ruby_version = '>= 2.4.0'
end

# bad
Gem::Specification.new do |spec|
  spec.required_ruby_version = '>= 2.6.0'
end

# bad
Gem::Specification.new do |spec|
  spec.required_ruby_version = ''
end

# good
Gem::Specification.new do |spec|
  spec.required_ruby_version = '>= 2.5.0'
end

# good
Gem::Specification.new do |spec|
  spec.required_ruby_version = '>= 2.5'
end

# accepted but not recommended
Gem::Specification.new do |spec|
  spec.required_ruby_version = ['>= 2.5.0', '< 2.7.0']
end

# accepted but not recommended, since
# Ruby does not really follow semantic versioning
Gem::Specification.new do |spec|
  spec.required_ruby_version = '~> 2.5'
end
----

[#configurable-attributes-gemspecrequiredrubyversion]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Severity
| `warning`
| String

| Include
| `+**/*.gemspec+`
| Array
|===

[#gemspecrubyversionglobalsusage]
== Gemspec/RubyVersionGlobalsUsage

|===
| Enabled by default | Safe | Supports autocorrection | Version Added | Version Changed

| Enabled
| Yes
| No
| 0.72
| 1.40
|===

Checks that `RUBY_VERSION` and `Ruby::VERSION` constants are not used in gemspec.
Using `RUBY_VERSION` and `Ruby::VERSION` is dangerous because the value of the
constant is determined by `rake release`.
It's possible to have a dependency based on the Ruby version used
to execute `rake release` and not the user's Ruby version.

[#examples-gemspecrubyversionglobalsusage]
=== Examples

[source,ruby]
----
# bad
Gem::Specification.new do |spec|
  if RUBY_VERSION >= '3.0'
    spec.add_dependency 'gem_a'
  else
    spec.add_dependency 'gem_b'
  end
end

# good
Gem::Specification.new do |spec|
  spec.add_dependency 'gem_a'
end
----

[#configurable-attributes-gemspecrubyversionglobalsusage]
=== Configurable attributes

|===
| Name | Default value | Configurable values

| Severity
| `warning`
| String

| Include
| `+**/*.gemspec+`
| Array
|===

[#references-gemspecrubyversionglobalsusage]
=== References

* https://rubystyle.guide#no-ruby-version-in-the-gemspec
