Upgrade to Grape v1.5.1

This fixes a few Ruby 2.7 deprecation warnings and eliminates the need
for the monkey patch in https://github.com/ruby-grape/grape/pull/2088.

Gemfile

@@ -84,9 +84,7 @@ gem 'gitlab_omniauth-ldap', '~> 2.1.1', require: 'omniauth-ldap'
 gem 'net-ldap', '~> 0.16.3'
 
 # API
-# Locked at Grape v1.4.0 until https://github.com/ruby-grape/grape/pull/2088 is merged
-# Remove config/initializers/grape_patch.rb
-gem 'grape', '= 1.4.0'
+gem 'grape', '~> 1.5.1'
 gem 'grape-entity', '~> 0.7.1'
 gem 'rack-cors', '~> 1.0.6', require: 'rack/cors'
 

Gemfile.lock

@@ -265,21 +265,19 @@ GEM
     doorkeeper-openid_connect (1.7.4)
       doorkeeper (>= 5.2, < 5.5)
       json-jwt (>= 1.11.0)
-    dry-configurable (0.11.5)
+    dry-configurable (0.12.0)
       concurrent-ruby (~> 1.0)
-      dry-core (~> 0.4, >= 0.4.7)
-      dry-equalizer (~> 0.2)
+      dry-core (~> 0.5, >= 0.5.0)
     dry-container (0.7.2)
       concurrent-ruby (~> 1.0)
       dry-configurable (~> 0.1, >= 0.1.3)
-    dry-core (0.4.9)
+    dry-core (0.5.0)
       concurrent-ruby (~> 1.0)
     dry-equalizer (0.3.0)
     dry-inflector (0.2.0)
-    dry-logic (1.0.6)
+    dry-logic (1.1.0)
       concurrent-ruby (~> 1.0)
-      dry-core (~> 0.2)
-      dry-equalizer (~> 0.2)
+      dry-core (~> 0.5, >= 0.5)
     dry-types (1.4.0)
       concurrent-ruby (~> 1.0)
       dry-container (~> 0.3)
@@ -496,7 +494,7 @@ GEM
       signet (~> 0.14)
     gpgme (2.0.20)
       mini_portile2 (~> 2.3)
-    grape (1.4.0)
+    grape (1.5.1)
       activesupport
       builder
       dry-types (>= 1.1)
@@ -1375,7 +1373,7 @@ DEPENDENCIES
   google-api-client (~> 0.33)
   google-protobuf (~> 3.12)
   gpgme (~> 2.0.19)
-  grape (= 1.4.0)
+  grape (~> 1.5.1)
   grape-entity (~> 0.7.1)
   grape-path-helpers (~> 1.5)
   grape_logging (~> 1.7)

changelogs/unreleased/sh-upgrade-grape-1-5-0.yml

+---
+title: Upgrade to Grape v1.5.0
+merge_request: 44554
+author:
+type: fixed

config/initializers/grape_patch.rb

-# frozen_string_literal: true
-# Monkey patch for Grape v1.4.0: https://github.com/ruby-grape/grape/pull/2088
-
-require 'grape'
-
-# rubocop:disable Gitlab/ModuleWithInstanceVariables
-module Grape
-  module DSL
-    module InsideRoute
-      def stream(value = nil)
-        return if value.nil? && @stream.nil?
-
-        header 'Content-Length', nil
-        header 'Transfer-Encoding', nil
-        header 'Cache-Control', 'no-cache' # Skips ETag generation (reading the response up front)
-
-        if value.is_a?(String)
-          file_body = Grape::ServeStream::FileBody.new(value)
-          @stream = Grape::ServeStream::StreamResponse.new(file_body)
-        elsif value.respond_to?(:each)
-          @stream = Grape::ServeStream::StreamResponse.new(value)
-        elsif !value.is_a?(NilClass)
-          raise ArgumentError, 'Stream object must respond to :each.'
-        else
-          @stream
-        end
-      end
-    end
-  end
-end
-# rubocop:enable Gitlab/ModuleWithInstanceVariables