Remove packages_conan_allow_empty_username_channel feature flag

app/models/packages/conan/metadatum.rb

@@ -10,17 +10,10 @@ class Packages::Conan::Metadatum < ApplicationRecord
   validates :package_username,
             :package_channel,
             presence: true,
-            format: { with: Gitlab::Regex.conan_recipe_component_regex },
-            if: -> { Feature.disabled?(:packages_conan_allow_empty_username_channel) }
-
-  validates :package_username,
-            :package_channel,
-            presence: true,
-            format: { with: Gitlab::Regex.conan_recipe_user_channel_regex },
-            if: -> { Feature.enabled?(:packages_conan_allow_empty_username_channel) }
+            format: { with: Gitlab::Regex.conan_recipe_user_channel_regex }
 
   validate :conan_package_type
-  validate :username_channel_none_values, if: -> { Feature.enabled?(:packages_conan_allow_empty_username_channel) }
+  validate :username_channel_none_values
 
   def recipe
     "#{package.name}/#{package.version}@#{package_username}/#{package_channel}"

config/feature_flags/development/packages_conan_allow_empty_username_channel.yml

----
-name: packages_conan_allow_empty_username_channel
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/75106
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/346006
-milestone: '14.5'
-type: development
-group: group::package
-default_enabled: false

config/initializers/grape_validators.rb

@@ -11,6 +11,3 @@ Grape::Validations.register_validator(:untrusted_regexp, ::API::Validations::Val
 Grape::Validations.register_validator(:email_or_email_list, ::API::Validations::Validators::EmailOrEmailList)
 Grape::Validations.register_validator(:iteration_id, ::API::Validations::Validators::IntegerOrCustomValue)
 Grape::Validations.register_validator(:project_portable, ::API::Validations::Validators::ProjectPortable)
-# TODO Delete this validator along with the packages_conan_allow_empty_username_channel feature flag
-# # https://gitlab.com/gitlab-org/gitlab/-/issues/346006
-Grape::Validations.register_validator('packages_conan_user_channel', ::API::Validations::Validators::PackagesConanUserChannel)

doc/user/packages/conan_repository/index.md

@@ -105,8 +105,7 @@ For more details about creating and managing Conan packages, see the
 
 #### Package without a username and a channel
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/345055) in GitLab 14.6 [with a flag](../../../administration/feature_flags.md) named `packages_conan_allow_empty_username_channel`. Disabled by default.
-> - [Enabled on GitLab.com](https://gitlab.com/gitlab-org/gitlab/-/issues/345055) in GitLab 14.6.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/345055) in GitLab 14.6.
 
 Even though they are [recommended](https://docs.conan.io/en/latest/reference/conanfile/attributes.html#user-channel)
 to distinguish your package from a similarly named existing package,

lib/api/concerns/packages/conan_endpoints.rb

@@ -27,6 +27,7 @@ module API
 
         PACKAGE_COMPONENT_REGEX = Gitlab::Regex.conan_recipe_component_regex
         CONAN_REVISION_REGEX = Gitlab::Regex.conan_revision_regex
+        CONAN_REVISION_USER_CHANNEL_REGEX = Gitlab::Regex.conan_recipe_user_channel_regex
 
         CONAN_FILES = (Gitlab::Regex::Packages::CONAN_RECIPE_FILES + Gitlab::Regex::Packages::CONAN_PACKAGE_FILES).freeze
 
@@ -105,12 +106,12 @@ module API
           params do
             requires :package_name, type: String, regexp: PACKAGE_COMPONENT_REGEX, desc: 'Package name'
             requires :package_version, type: String, regexp: PACKAGE_COMPONENT_REGEX, desc: 'Package version'
-            requires :package_username, type: String, packages_conan_user_channel: true, desc: 'Package username'
-            requires :package_channel, type: String, packages_conan_user_channel: true, desc: 'Package channel'
+            requires :package_username, type: String, regexp: CONAN_REVISION_USER_CHANNEL_REGEX, desc: 'Package username'
+            requires :package_channel, type: String, regexp: CONAN_REVISION_USER_CHANNEL_REGEX, desc: 'Package channel'
           end
           namespace 'conans/:package_name/:package_version/:package_username/:package_channel', requirements: PACKAGE_REQUIREMENTS do
             after_validation do
-              check_username_channel if Feature.enabled?(:packages_conan_allow_empty_username_channel)
+              check_username_channel
             end
 
             # Get the snapshot
@@ -268,8 +269,8 @@ module API
           params do
             requires :package_name, type: String, regexp: PACKAGE_COMPONENT_REGEX, desc: 'Package name'
             requires :package_version, type: String, regexp: PACKAGE_COMPONENT_REGEX, desc: 'Package version'
-            requires :package_username, type: String, packages_conan_user_channel: true, desc: 'Package username'
-            requires :package_channel, type: String, packages_conan_user_channel: true, desc: 'Package channel'
+            requires :package_username, type: String, regexp: CONAN_REVISION_USER_CHANNEL_REGEX, desc: 'Package username'
+            requires :package_channel, type: String, regexp: CONAN_REVISION_USER_CHANNEL_REGEX, desc: 'Package channel'
             requires :recipe_revision, type: String, regexp: CONAN_REVISION_REGEX, desc: 'Conan Recipe Revision'
           end
           namespace 'files/:package_name/:package_version/:package_username/:package_channel/:recipe_revision', requirements: PACKAGE_REQUIREMENTS do
@@ -278,7 +279,7 @@ module API
             end
 
             after_validation do
-              check_username_channel if Feature.enabled?(:packages_conan_allow_empty_username_channel)
+              check_username_channel
             end
 
             params do

lib/api/validations/validators/packages_conan_user_channel.rb

-# frozen_string_literal: true
-
-module API
-  module Validations
-    module Validators
-      # TODO Delete this validator along with the packages_conan_allow_empty_username_channel feature flag
-      # Use a regexp validator in its place: regexp: Gitlab::Regex.conan_recipe_user_channel_regex
-      # https://gitlab.com/gitlab-org/gitlab/-/issues/346006
-      class PackagesConanUserChannel < Grape::Validations::Base
-        def validate_param!(attr_name, params)
-          value = params[attr_name]
-
-          if Feature.enabled?(:packages_conan_allow_empty_username_channel)
-            unless Gitlab::Regex.conan_recipe_user_channel_regex.match?(value)
-              raise Grape::Exceptions::Validation.new(
-                params: [@scope.full_name(attr_name)],
-                message: 'is invalid'
-              )
-            end
-          else
-            unless Gitlab::Regex.conan_recipe_component_regex.match?(value)
-              raise Grape::Exceptions::Validation.new(
-                params: [@scope.full_name(attr_name)],
-                message: 'is invalid'
-              )
-            end
-          end
-        end
-      end
-    end
-  end
-end

spec/lib/api/validations/validators/packages_conan_user_channel_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-RSpec.describe API::Validations::Validators::PackagesConanUserChannel do
-  include ApiValidatorsHelpers
-
-  describe '#validate_param!' do
-    subject do
-      described_class.new(['test'], {}, false, scope.new)
-    end
-
-    shared_examples 'accepting valid values for conan user channels' do
-      let(:fifty_one_characters) { 'f_a' * 17}
-
-      it { expect_no_validation_error('test' => 'foobar') }
-      it { expect_no_validation_error('test' => 'foo_bar') }
-      it { expect_no_validation_error('test' => 'foo+bar') }
-      it { expect_no_validation_error('test' => '_foo+bar-baz+1.0') }
-      it { expect_no_validation_error('test' => '1.0.0') }
-      it { expect_validation_error('test' => '-foo_bar') }
-      it { expect_validation_error('test' => '+foo_bar') }
-      it { expect_validation_error('test' => '.foo_bar') }
-      it { expect_validation_error('test' => 'foo@bar') }
-      it { expect_validation_error('test' => 'foo/bar') }
-      it { expect_validation_error('test' => '!!()()') }
-      it { expect_validation_error('test' => fifty_one_characters) }
-    end
-
-    it_behaves_like 'accepting valid values for conan user channels'
-    it { expect_no_validation_error('test' => '_') }
-
-    context 'with packages_conan_allow_empty_username_channel disabled' do
-      before do
-        stub_feature_flags(packages_conan_allow_empty_username_channel: false)
-      end
-
-      it_behaves_like 'accepting valid values for conan user channels'
-      it { expect_validation_error('test' => '_') }
-    end
-  end
-end

spec/models/packages/conan/metadatum_spec.rb

@@ -54,23 +54,17 @@ RSpec.describe Packages::Conan::Metadatum, type: :model do
 
       subject { metadatum.valid? }
 
-      where(:username, :channel, :feature_flag, :valid) do
-        'username' | 'channel' | true  | true
-        'username' | '_'       | true  | false
-        '_'        | 'channel' | true  | false
-        '_'        | '_'       | true  | true
-
-        'username' | 'channel' | false | true
-        'username' | '_'       | false | false
-        '_'        | 'channel' | false | false
-        '_'        | '_'       | false | false
+      where(:username, :channel, :valid) do
+        'username' | 'channel' | true
+        'username' | '_'       | false
+        '_'        | 'channel' | false
+        '_'        | '_'       | true
       end
 
       with_them do
         before do
           metadatum.package_username = username
           metadatum.package_channel = channel
-          stub_feature_flags(packages_conan_allow_empty_username_channel: feature_flag)
         end
 
         it { is_expected.to eq(valid) }

spec/support/shared_examples/requests/api/conan_packages_shared_examples.rb

@@ -183,16 +183,11 @@ RSpec.shared_examples 'handling empty values for username and channel' do
 
   let(:recipe_path) { "#{package.name}/#{package.version}/#{package_username}/#{channel}" }
 
-  where(:username, :channel, :feature_flag, :status) do
-    'username' | 'channel' | true  | :ok
-    'username' | '_'       | true  | :bad_request
-    '_'        | 'channel' | true  | :bad_request_or_not_found
-    '_'        | '_'       | true  | :ok_or_not_found
-
-    'username' | 'channel' | false | :ok
-    'username' | '_'       | false | :bad_request
-    '_'        | 'channel' | false | :bad_request
-    '_'        | '_'       | false | :bad_request
+  where(:username, :channel, :status) do
+    'username' | 'channel' | :ok
+    'username' | '_'       | :bad_request
+    '_'        | 'channel' | :bad_request_or_not_found
+    '_'        | '_'       | :ok_or_not_found
   end
 
   with_them do
@@ -205,7 +200,6 @@ RSpec.shared_examples 'handling empty values for username and channel' do
     end
 
     before do
-      stub_feature_flags(packages_conan_allow_empty_username_channel: feature_flag)
       project.add_maintainer(user) # avoid any permission issue
     end