Use new deprecation information when generating docs

This makes use of the new deprecation abstraction when generating
the GraphQL documentation to provide richer structure.

app/graphql/types/query_type.rb

@@ -82,11 +82,16 @@ module Types
             argument :id, ::Types::GlobalIDType[::Issue], required: true, description: 'The global ID of the Issue.'
           end
 
-    field :instance_statistics_measurements, Types::Admin::Analytics::UsageTrends::MeasurementType.connection_type,
+    field :instance_statistics_measurements,
+          type: Types::Admin::Analytics::UsageTrends::MeasurementType.connection_type,
           null: true,
           description: 'Get statistics on the instance.',
-          deprecated: { reason: 'This field was renamed. Use the `usageTrendsMeasurements` field instead', milestone: '13.10' },
-          resolver: Resolvers::Admin::Analytics::UsageTrends::MeasurementsResolver
+          resolver: Resolvers::Admin::Analytics::UsageTrends::MeasurementsResolver,
+          deprecated: {
+            reason: :renamed,
+            replacement: 'Query.usageTrendsMeasurements',
+            milestone: '13.10'
+          }
 
     field :usage_trends_measurements, Types::Admin::Analytics::UsageTrends::MeasurementType.connection_type,
           null: true,

app/graphql/types/sort_enum.rb

@@ -7,10 +7,34 @@ module Types
 
     # Deprecated, as we prefer uppercase enums
     # https://gitlab.com/groups/gitlab-org/-/epics/1838
-    value 'updated_desc', 'Updated at descending order.', value: :updated_desc, deprecated: { reason: 'Use UPDATED_DESC', milestone: '13.5' }
-    value 'updated_asc', 'Updated at ascending order.', value: :updated_asc, deprecated: { reason: 'Use UPDATED_ASC', milestone: '13.5' }
-    value 'created_desc', 'Created at descending order.', value: :created_desc, deprecated: { reason: 'Use CREATED_DESC', milestone: '13.5' }
-    value 'created_asc', 'Created at ascending order.', value: :created_asc, deprecated: { reason: 'Use CREATED_ASC', milestone: '13.5' }
+    value 'updated_desc', 'Updated at descending order.',
+          value: :updated_desc,
+          deprecated: {
+            reason: :renamed,
+            replacement: 'UPDATED_DESC',
+            milestone: '13.5'
+          }
+    value 'updated_asc', 'Updated at ascending order.',
+          value: :updated_asc,
+          deprecated: {
+            reason: :renamed,
+            replacement: 'UPDATED_ASC',
+            milestone: '13.5'
+          }
+    value 'created_desc', 'Created at descending order.',
+          value: :created_desc,
+          deprecated: {
+            reason: :renamed,
+            replacement: 'CREATED_DESC',
+            milestone: '13.5'
+          }
+    value 'created_asc', 'Created at ascending order.',
+          value: :created_asc,
+          deprecated: {
+            reason: :renamed,
+            replacement: 'CREATED_ASC',
+            milestone: '13.5'
+          }
 
     value 'UPDATED_DESC', 'Updated at descending order.', value: :updated_desc
     value 'UPDATED_ASC', 'Updated at ascending order.', value: :updated_asc

changelogs/unreleased/ajk-graphql-fancy-deprecations.yml

+---
+title: Change how we handle deprecations in GraphQL docs
+merge_request: 56698
+author:
+type: changed

ee/app/graphql/ee/types/query_type.rb

@@ -40,7 +40,7 @@ module EE
               null: true,
               description: "Number of vulnerabilities per severity level, per day, for the projects on the current user's instance security dashboard.",
               resolver: ::Resolvers::VulnerabilitiesHistoryResolver,
-              deprecated: { reason: 'Use `vulnerabilitiesCountByDay`', milestone: '13.3' }
+              deprecated: { reason: :discouraged, replacement: 'Query.vulnerabilitiesCountByDay', milestone: '13.3' }
 
         field :geo_node, ::Types::Geo::GeoNodeType,
               null: true,

lib/gitlab/graphql/docs/helper.rb

@@ -27,7 +27,7 @@ module Gitlab
           MD
         end
 
-        def render_name_and_description(object, level = 3)
+        def render_name_and_description(object, owner: nil, level: 3)
           content = []
 
           content << "#{'#' * level} `#{object[:name]}`"
@@ -35,10 +35,18 @@ module Gitlab
           if object[:description].present?
             desc = object[:description].strip
             desc += '.' unless desc.ends_with?('.')
+          end
+
+          if object[:is_deprecated]
+            owner = Array.wrap(owner)
+            deprecation = schema_deprecation(owner, object[:name])
+            content << (deprecation&.original_description || desc)
+            content << render_deprecation(object, owner, :block)
+          else
             content << desc
           end
 
-          content.join("\n\n")
+          content.compact.join("\n\n")
         end
 
         def sorted_by_name(objects)
@@ -47,19 +55,23 @@ module Gitlab
           objects.sort_by { |o| o[:name] }
         end
 
-        def render_field(field)
-          row(render_name(field), render_field_type(field[:type]), render_description(field))
+        def render_field(field, owner)
+          row(
+            render_name(field, owner),
+            render_field_type(field[:type]),
+            render_description(field, owner, :inline)
+          )
         end
 
-        def render_enum_value(value)
-          row(render_name(value), render_description(value))
+        def render_enum_value(enum, value)
+          row(render_name(value, enum[:name]), render_description(value, enum[:name], :inline))
         end
 
         def row(*values)
-          "| #{values.join(' | ')} |"
+          "| #{values.map { |val| val.to_s.gsub(/\n+/, ' ') }.join(' | ')} |"
         end
 
-        def render_name(object)
+        def render_name(object, owner = nil)
           rendered_name = "`#{object[:name]}`"
           rendered_name += ' **{warning-solid}**' if object[:is_deprecated]
           rendered_name
@@ -67,10 +79,51 @@ module Gitlab
 
         # Returns the object description. If the object has been deprecated,
         # the deprecation reason will be returned in place of the description.
-        def render_description(object)
-          return object[:description] unless object[:is_deprecated]
+        def render_description(object, owner = nil, context = :block)
+          owner = Array.wrap(owner)
+          return render_deprecation(object, owner, context) if object[:is_deprecated]
+          return if object[:description].blank?
+
+          desc = object[:description].strip
+          desc += '.' unless desc.ends_with?('.')
+          desc
+        end
+
+        def render_deprecation(object, owner, context)
+          deprecation = schema_deprecation(owner, object[:name])
+          return deprecation.markdown(context: context) if deprecation
+
+          reason = object[:deprecation_reason] || 'Use of this is deprecated.'
+          "**Deprecated:** #{reason}"
+        end
+
+        def schema_deprecation(type_name, field_name)
+          schema_field(type_name, field_name)&.deprecation
+        end
+
+        def schema_field(type_name, field_name)
+          type_name = Array.wrap(type_name)
+          if type_name.size == 2
+            arg_name = field_name
+            type_name, field_name = type_name
+          else
+            type_name = type_name.first
+            arg_name = nil
+          end
+
+          return if type_name.nil? || field_name.nil?
+
+          type = schema.types[type_name]
+          return unless type && type.kind.fields?
+
+          field = type.fields[field_name]
+          return field if arg_name.nil?
+
+          args = field.arguments
+          is_mutation = field.mutation && field.mutation <= ::Mutations::BaseMutation
+          args = args['input'].type.unwrap.arguments if is_mutation
 
-          "**Deprecated:** #{object[:deprecation_reason]}"
+          args[arg_name]
         end
 
         def render_field_type(type)

lib/gitlab/graphql/docs/renderer.rb

@@ -10,17 +10,20 @@ module Gitlab
       # It uses graphql-docs helpers and schema parser, more information in https://github.com/gjtorikian/graphql-docs.
       #
       # Arguments:
-      #   schema - the GraphQL schema definition. For GitLab should be: GitlabSchema.graphql_definition
+      #   schema - the GraphQL schema definition. For GitLab should be: GitlabSchema
       #   output_dir: The folder where the markdown files will be saved
       #   template: The path of the haml template to be parsed
       class Renderer
         include Gitlab::Graphql::Docs::Helper
 
+        attr_reader :schema
+
         def initialize(schema, output_dir:, template:)
           @output_dir = output_dir
           @template = template
           @layout = Haml::Engine.new(File.read(template))
-          @parsed_schema = GraphQLDocs::Parser.new(schema, {}).parse
+          @parsed_schema = GraphQLDocs::Parser.new(schema.graphql_definition, {}).parse
+          @schema = schema
         end
 
         def contents

lib/gitlab/graphql/docs/templates/default.md.haml

@@ -27,7 +27,7 @@
 \
 
 - sorted_by_name(queries).each do |query|
-  = render_name_and_description(query)
+  = render_name_and_description(query, owner: 'Query')
   \
   = render_return_type(query)
   - unless query[:arguments].empty?
@@ -35,7 +35,7 @@
     ~ "| Name | Type | Description |"
     ~ "| ---- | ---- | ----------- |"
     - sorted_by_name(query[:arguments]).each do |argument|
-      = render_field(argument)
+      = render_field(argument, query[:type][:name])
     \
 
 :plain
@@ -58,7 +58,7 @@
     ~ "| Field | Type | Description |"
     ~ "| ----- | ---- | ----------- |"
     - sorted_by_name(type[:fields]).each do |field|
-      = render_field(field)
+      = render_field(field, type[:name])
     \
 
 :plain
@@ -79,7 +79,7 @@
     ~ "| Value | Description |"
     ~ "| ----- | ----------- |"
     - sorted_by_name(enum[:values]).each do |value|
-      = render_enum_value(value)
+      = render_enum_value(enum, value)
     \
 
 :plain
@@ -121,7 +121,7 @@
 \
 
 - graphql_union_types.each do |type|
-  = render_name_and_description(type, 4)
+  = render_name_and_description(type, level: 4)
   \
   One of:
   \
@@ -134,7 +134,7 @@
 \
 
 - graphql_interface_types.each do |type|
-  = render_name_and_description(type, 4)
+  = render_name_and_description(type, level: 4)
   \
   Implementations:
   \
@@ -144,5 +144,5 @@
   ~ "| Field | Type | Description |"
   ~ "| ----- | ---- | ----------- |"
   - sorted_by_name(type[:fields] + type[:connections]).each do |field|
-    = render_field(field)
+    = render_field(field, type[:name])
   \

lib/tasks/gitlab/graphql.rake

@@ -110,7 +110,7 @@ namespace :gitlab do
 
     desc 'GitLab | GraphQL | Generate GraphQL docs'
     task compile_docs: [:environment, :enable_feature_flags] do
-      renderer = Gitlab::Graphql::Docs::Renderer.new(GitlabSchema.graphql_definition, render_options)
+      renderer = Gitlab::Graphql::Docs::Renderer.new(GitlabSchema, render_options)
 
       renderer.write
 
@@ -119,7 +119,7 @@ namespace :gitlab do
 
     desc 'GitLab | GraphQL | Check if GraphQL docs are up to date'
     task check_docs: [:environment, :enable_feature_flags] do
-      renderer = Gitlab::Graphql::Docs::Renderer.new(GitlabSchema.graphql_definition, render_options)
+      renderer = Gitlab::Graphql::Docs::Renderer.new(GitlabSchema, render_options)
 
       doc = File.read(Rails.root.join(OUTPUT_DIR, 'index.md'))
 

spec/lib/gitlab/graphql/docs/renderer_spec.rb

@@ -4,29 +4,32 @@ require 'spec_helper'
 
 RSpec.describe Gitlab::Graphql::Docs::Renderer do
   describe '#contents' do
-    # Returns a Schema that uses the given `type`
-    def mock_schema(type, field_description)
-      query_type = Class.new(Types::BaseObject) do
-        graphql_name 'Query'
+    let_it_be(:template) { Rails.root.join('lib/gitlab/graphql/docs/templates/default.md.haml') }
 
-        field :foo, type, null: true do
-          description field_description
+    let(:query_type) do
+      Class.new(Types::BaseObject) { graphql_name 'Query' }.tap do |t|
+        # this keeps type and field_description in scope.
+        t.field :foo, type, null: true, description: field_description do
           argument :id, GraphQL::ID_TYPE, required: false, description: 'ID of the object.'
         end
       end
+    end
 
-      GraphQL::Schema.define(
-        query: query_type,
-        resolve_type: ->(obj, ctx) { raise 'Not a real schema' }
-      )
+    let(:mock_schema) do
+      Class.new(GraphQL::Schema) do
+        def resolve_type(obj, ctx)
+          raise 'Not a real schema'
+        end
+      end
     end
 
-    let_it_be(:template) { Rails.root.join('lib/gitlab/graphql/docs/templates/default.md.haml') }
     let(:field_description) { 'List of objects.' }
 
     subject(:contents) do
+      mock_schema.query(query_type)
+
       described_class.new(
-        mock_schema(type, field_description).graphql_definition,
+        mock_schema,
         output_dir: nil,
         template: template
       ).contents
@@ -136,6 +139,22 @@ RSpec.describe Gitlab::Graphql::Docs::Renderer do
                 null: false,
                 deprecated: { reason: 'This is deprecated', milestone: '1.10' },
                 description: 'A description.'
+          field :foo_with_args,
+                type: GraphQL::STRING_TYPE,
+                null: false,
+                deprecated: { reason: 'Do not use', milestone: '1.10' },
+                description: 'A description.' do
+                  argument :fooity, ::GraphQL::INT_TYPE, required: false, description: 'X'
+                end
+          field :bar,
+                type: GraphQL::STRING_TYPE,
+                null: false,
+                description: 'A description.',
+                deprecated: {
+                  reason: :renamed,
+                  milestone: '1.10',
+                  replacement: 'Query.boom'
+                }
         end
       end
 
@@ -145,7 +164,40 @@ RSpec.describe Gitlab::Graphql::Docs::Renderer do
 
           | Field | Type | Description |
           | ----- | ---- | ----------- |
-          | `foo` **{warning-solid}** | [`String!`](#string) | **Deprecated:** This is deprecated. Deprecated in 1.10. |
+          | `bar` **{warning-solid}** | [`String!`](#string) | **Deprecated** in 1.10. This was renamed. Use: `Query.boom`. |
+          | `foo` **{warning-solid}** | [`String!`](#string) | **Deprecated** in 1.10. This is deprecated. |
+          | `fooWithArgs` **{warning-solid}** | [`String!`](#string) | **Deprecated** in 1.10. Do not use. |
+        DOC
+
+        is_expected.to include(expectation)
+      end
+    end
+
+    context 'when a Query.field is deprecated' do
+      let(:type) { ::GraphQL::INT_TYPE }
+
+      before do
+        query_type.field(
+          name: :bar,
+          type: type,
+          null: true,
+          description: 'A bar',
+          deprecated: { reason: :renamed, milestone: '10.11', replacement: 'Query.foo' }
+        )
+      end
+
+      it 'includes the deprecation' do
+        expectation = <<~DOC
+          ### `bar`
+
+          A bar.
+
+          WARNING:
+          **Deprecated** in 10.11.
+          This was renamed.
+          Use: `Query.foo`.
+
+          Returns [`Int`](#int).
         DOC
 
         is_expected.to include(expectation)