Merge branch 'master' into glitch-soc/merge-upstream

21 files changed, 699 insertions, 150 deletions

diff --git a/Gemfile b/Gemfile
index e489e3090..4389f8ebd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -111,7 +111,7 @@ group :production, :test do
 end
 
 group :test do
-  gem 'capybara', '~> 3.24'
+  gem 'capybara', '~> 3.25'
   gem 'climate_control', '~> 0.2'
   gem 'faker', '~> 1.9'
   gem 'microformats', '~> 4.1'
@@ -131,7 +131,7 @@ group :development do
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.3'
   gem 'memory_profiler'
-  gem 'rubocop', '~> 0.71', require: false
+  gem 'rubocop', '~> 0.72', require: false
   gem 'rubocop-rails', '~> 2.0', require: false
   gem 'brakeman', '~> 4.5', require: false
   gem 'bundler-audit', '~> 0.6', require: false
@@ -151,3 +151,4 @@ group :production do
 end
 
 gem 'concurrent-ruby', require: false
+gem 'connection_pool', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index c01439081..c8e00d7a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,7 +106,7 @@ GEM
     brakeman (4.5.1)
     browser (2.5.3)
     builder (3.2.3)
-    bullet (6.0.0)
+    bullet (6.0.1)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.11)
     bundler-audit (0.6.1)
@@ -129,7 +129,7 @@ GEM
       sshkit (~> 1.3)
     capistrano-yarn (2.0.2)
       capistrano (~> 3.0)
-    capybara (3.24.0)
+    capybara (3.25.0)
       addressable
       mini_mime (>= 0.1.3)
       nokogiri (~> 1.8)
@@ -289,7 +289,7 @@ GEM
     idn-ruby (0.1.0)
     ipaddress (0.8.3)
     iso-639 (0.2.8)
-    jaro_winkler (1.5.2)
+    jaro_winkler (1.5.3)
     jmespath (1.4.0)
     json (2.1.0)
     json-ld (3.0.2)
@@ -338,7 +338,7 @@ GEM
       mimemagic (~> 0.3.2)
     mario-redis-lock (1.2.1)
       redis (>= 3.0.5)
-    memory_profiler (0.9.13)
+    memory_profiler (0.9.14)
     method_source (0.9.2)
     microformats (4.1.0)
       json (~> 2.1)
@@ -422,7 +422,7 @@ GEM
       pry (~> 0.10)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    public_suffix (3.1.0)
+    public_suffix (3.1.1)
     puma (3.12.1)
     pundit (2.0.1)
       activesupport (>= 3.0.0)
@@ -527,7 +527,7 @@ GEM
       rspec-core (~> 3.0, >= 3.0.0)
       sidekiq (>= 2.4.0)
     rspec-support (3.8.0)
-    rubocop (0.71.0)
+    rubocop (0.72.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.6)
@@ -663,12 +663,13 @@ DEPENDENCIES
   capistrano-rails (~> 1.4)
   capistrano-rbenv (~> 2.1)
   capistrano-yarn (~> 2.0)
-  capybara (~> 3.24)
+  capybara (~> 3.25)
   charlock_holmes (~> 0.7.6)
   chewy (~> 5.0)
   cld3 (~> 3.2.4)
   climate_control (~> 0.2)
   concurrent-ruby
+  connection_pool
   derailed_benchmarks
   devise (~> 4.6)
   devise-two-factor (~> 3.0)
@@ -742,7 +743,7 @@ DEPENDENCIES
   rqrcode (~> 0.10)
   rspec-rails (~> 3.8)
   rspec-sidekiq (~> 3.0)
-  rubocop (~> 0.71)
+  rubocop (~> 0.72)
   rubocop-rails (~> 2.0)
   sanitize (~> 5.0)
   sidekiq (~> 5.2)
diff --git a/app/javascript/mastodon/features/status/index.js b/app/javascript/mastodon/features/status/index.js
index 981eb9d58..0422111ae 100644
--- a/app/javascript/mastodon/features/status/index.js
+++ b/app/javascript/mastodon/features/status/index.js
@@ -4,6 +4,7 @@ import { connect } from 'react-redux';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import ImmutablePropTypes from 'react-immutable-proptypes';
+import { createSelector } from 'reselect';
 import { fetchStatus } from '../../actions/statuses';
 import MissingIndicator from '../../components/missing_indicator';
 import DetailedStatus from './components/detailed_status';
@@ -63,39 +64,58 @@ const messages = defineMessages({
 const makeMapStateToProps = () => {
   const getStatus = makeGetStatus();
 
-  const mapStateToProps = (state, props) => {
-    const status = getStatus(state, { id: props.params.statusId });
+  const getAncestorsIds = createSelector([
+    (_, { id }) => id,
+    state => state.getIn(['contexts', 'inReplyTos']),
+  ], (statusId, inReplyTos) => {
     let ancestorsIds = Immutable.List();
+    ancestorsIds = ancestorsIds.withMutations(mutable => {
+      let id = statusId;
+
+      while (id) {
+        mutable.unshift(id);
+        id = inReplyTos.get(id);
+      }
+    });
+
+    return ancestorsIds;
+  });
+
+  const getDescendantsIds = createSelector([
+    (_, { id }) => id,
+    state => state.getIn(['contexts', 'replies']),
+  ], (statusId, contextReplies) => {
     let descendantsIds = Immutable.List();
+    descendantsIds = descendantsIds.withMutations(mutable => {
+      const ids = [statusId];
 
-    if (status) {
-      ancestorsIds = ancestorsIds.withMutations(mutable => {
-        let id = status.get('in_reply_to_id');
+      while (ids.length > 0) {
+        let id        = ids.shift();
+        const replies = contextReplies.get(id);
 
-        while (id) {
-          mutable.unshift(id);
-          id = state.getIn(['contexts', 'inReplyTos', id]);
+        if (statusId !== id) {
+          mutable.push(id);
         }
-      });
 
-      descendantsIds = descendantsIds.withMutations(mutable => {
-        const ids = [status.get('id')];
+        if (replies) {
+          replies.reverse().forEach(reply => {
+            ids.unshift(reply);
+          });
+        }
+      }
+    });
 
-        while (ids.length > 0) {
-          let id        = ids.shift();
-          const replies = state.getIn(['contexts', 'replies', id]);
+    return descendantsIds;
+  });
 
-          if (status.get('id') !== id) {
-            mutable.push(id);
-          }
+  const mapStateToProps = (state, props) => {
+    const status = getStatus(state, { id: props.params.statusId });
+    let ancestorsIds = Immutable.List();
+    let descendantsIds = Immutable.List();
 
-          if (replies) {
-            replies.reverse().forEach(reply => {
-              ids.unshift(reply);
-            });
-          }
-        }
-      });
+    if (status) {
+      ancestorsIds = getAncestorsIds(state, { id: status.get('in_reply_to_id') });
+      descendantsIds = getDescendantsIds(state, { id: status.get('id') });
     }
 
     return {
diff --git a/app/javascript/mastodon/reducers/compose.js b/app/javascript/mastodon/reducers/compose.js
index 8cdd29bfe..fae7522b2 100644
--- a/app/javascript/mastodon/reducers/compose.js
+++ b/app/javascript/mastodon/reducers/compose.js
@@ -195,6 +195,12 @@ const expandMentions = status => {
   return fragment.innerHTML;
 };
 
+const expiresInFromExpiresAt = expires_at => {
+  if (!expires_at) return 24 * 3600;
+  const delta = (new Date(expires_at).getTime() - Date.now()) / 1000;
+  return [300, 1800, 3600, 21600, 86400, 259200, 604800].find(expires_in => expires_in >= delta) || 24 * 3600;
+};
+
 export default function compose(state = initialState, action) {
   switch(action.type) {
   case STORE_HYDRATE:
@@ -353,7 +359,7 @@ export default function compose(state = initialState, action) {
         map.set('poll', ImmutableMap({
           options: action.status.getIn(['poll', 'options']).map(x => x.get('title')),
           multiple: action.status.getIn(['poll', 'multiple']),
-          expires_in: 24 * 3600,
+          expires_in: expiresInFromExpiresAt(action.status.getIn(['poll', 'expires_at'])),
         }));
       }
     });
diff --git a/app/lib/connection_pool/shared_connection_pool.rb b/app/lib/connection_pool/shared_connection_pool.rb
new file mode 100644
index 000000000..2865a4108
--- /dev/null
+++ b/app/lib/connection_pool/shared_connection_pool.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'connection_pool'
+require_relative './shared_timed_stack'
+
+class ConnectionPool::SharedConnectionPool < ConnectionPool
+  def initialize(options = {}, &block)
+    super(options, &block)
+
+    @available = ConnectionPool::SharedTimedStack.new(@size, &block)
+  end
+
+  delegate :size, :flush, to: :@available
+
+  def with(preferred_tag, options = {})
+    Thread.handle_interrupt(Exception => :never) do
+      conn = checkout(preferred_tag, options)
+
+      begin
+        Thread.handle_interrupt(Exception => :immediate) do
+          yield conn
+        end
+      ensure
+        checkin(preferred_tag)
+      end
+    end
+  end
+
+  def checkout(preferred_tag, options = {})
+    if ::Thread.current[key(preferred_tag)]
+      ::Thread.current[key_count(preferred_tag)] += 1
+      ::Thread.current[key(preferred_tag)]
+    else
+      ::Thread.current[key_count(preferred_tag)] = 1
+      ::Thread.current[key(preferred_tag)] = @available.pop(preferred_tag, options[:timeout] || @timeout)
+    end
+  end
+
+  def checkin(preferred_tag)
+    if ::Thread.current[key(preferred_tag)]
+      if ::Thread.current[key_count(preferred_tag)] == 1
+        @available.push(::Thread.current[key(preferred_tag)])
+        ::Thread.current[key(preferred_tag)] = nil
+      else
+        ::Thread.current[key_count(preferred_tag)] -= 1
+      end
+    else
+      raise ConnectionPool::Error, 'no connections are checked out'
+    end
+
+    nil
+  end
+
+  private
+
+  def key(tag)
+    :"#{@key}-#{tag}"
+  end
+
+  def key_count(tag)
+    :"#{@key_count}-#{tag}"
+  end
+end
diff --git a/app/lib/connection_pool/shared_timed_stack.rb b/app/lib/connection_pool/shared_timed_stack.rb
new file mode 100644
index 000000000..14a5285c4
--- /dev/null
+++ b/app/lib/connection_pool/shared_timed_stack.rb
@@ -0,0 +1,95 @@
+# frozen_string_literal: true
+
+class ConnectionPool::SharedTimedStack
+  def initialize(max = 0, &block)
+    @create_block = block
+    @max          = max
+    @created      = 0
+    @queue        = []
+    @tagged_queue = Hash.new { |hash, key| hash[key] = [] }
+    @mutex        = Mutex.new
+    @resource     = ConditionVariable.new
+  end
+
+  def push(connection)
+    @mutex.synchronize do
+      store_connection(connection)
+      @resource.broadcast
+    end
+  end
+
+  alias << push
+
+  def pop(preferred_tag, timeout = 5.0)
+    deadline = current_time + timeout
+
+    @mutex.synchronize do
+      loop do
+        return fetch_preferred_connection(preferred_tag) unless @tagged_queue[preferred_tag].empty?
+
+        connection = try_create(preferred_tag)
+        return connection if connection
+
+        to_wait = deadline - current_time
+        raise Timeout::Error, "Waited #{timeout} sec" if to_wait <= 0
+
+        @resource.wait(@mutex, to_wait)
+      end
+    end
+  end
+
+  def empty?
+    size.zero?
+  end
+
+  def size
+    @mutex.synchronize do
+      @queue.size
+    end
+  end
+
+  def flush
+    @mutex.synchronize do
+      @queue.delete_if do |connection|
+        delete = !connection.in_use && (connection.dead || connection.seconds_idle >= RequestPool::MAX_IDLE_TIME)
+
+        if delete
+          @tagged_queue[connection.site].delete(connection)
+          connection.close
+          @created -= 1
+        end
+
+        delete
+      end
+    end
+  end
+
+  private
+
+  def try_create(preferred_tag)
+    if @created == @max && !@queue.empty?
+      throw_away_connection = @queue.pop
+      @tagged_queue[throw_away_connection.site].delete(throw_away_connection)
+      @create_block.call(preferred_tag)
+    elsif @created != @max
+      connection = @create_block.call(preferred_tag)
+      @created += 1
+      connection
+    end
+  end
+
+  def fetch_preferred_connection(preferred_tag)
+    connection = @tagged_queue[preferred_tag].pop
+    @queue.delete(connection)
+    connection
+  end
+
+  def current_time
+    Process.clock_gettime(Process::CLOCK_MONOTONIC)
+  end
+
+  def store_connection(connection)
+    @tagged_queue[connection.site].push(connection)
+    @queue.push(connection)
+  end
+end
diff --git a/app/lib/request.rb b/app/lib/request.rb
index e555ae6a1..af49d6c77 100644
--- a/app/lib/request.rb
+++ b/app/lib/request.rb
@@ -17,15 +17,21 @@ end
 class Request
   REQUEST_TARGET = '(request-target)'
 
+  # We enforce a 5s timeout on DNS resolving, 5s timeout on socket opening
+  # and 5s timeout on the TLS handshake, meaning the worst case should take
+  # about 15s in total
+  TIMEOUT = { connect: 5, read: 10, write: 10 }.freeze
+
   include RoutingHelper
 
   def initialize(verb, url, **options)
     raise ArgumentError if url.blank?
 
-    @verb    = verb
-    @url     = Addressable::URI.parse(url).normalize
-    @options = options.merge(use_proxy? ? Rails.configuration.x.http_client_proxy : { socket_class: Socket })
-    @headers = {}
+    @verb        = verb
+    @url         = Addressable::URI.parse(url).normalize
+    @http_client = options.delete(:http_client)
+    @options     = options.merge(use_proxy? ? Rails.configuration.x.http_client_proxy : { socket_class: Socket })
+    @headers     = {}
 
     raise Mastodon::HostValidationError, 'Instance does not support hidden service connections' if block_hidden_service?
 
@@ -50,15 +56,24 @@ class Request
 
   def perform
     begin
-      response = http_client.headers(headers).public_send(@verb, @url.to_s, @options)
+      response = http_client.public_send(@verb, @url.to_s, @options.merge(headers: headers))
     rescue => e
       raise e.class, "#{e.message} on #{@url}", e.backtrace[0]
     end
 
     begin
-      yield response.extend(ClientLimit) if block_given?
+      response = response.extend(ClientLimit)
+
+      # If we are using a persistent connection, we have to
+      # read every response to be able to move forward at all.
+      # However, simply calling #to_s or #flush may not be safe,
+      # as the response body, if malicious, could be too big
+      # for our memory. So we use the #body_with_limit method
+      response.body_with_limit if http_client.persistent?
+
+      yield response if block_given?
     ensure
-      http_client.close
+      http_client.close unless http_client.persistent?
     end
   end
 
@@ -76,6 +91,10 @@ class Request
 
       %w(http https).include?(parsed_url.scheme) && parsed_url.host.present?
     end
+
+    def http_client
+      HTTP.use(:auto_inflate).timeout(:per_operation, TIMEOUT.dup).follow(max_hops: 2)
+    end
   end
 
   private
@@ -116,16 +135,8 @@ class Request
     end
   end
 
-  def timeout
-    # We enforce a 1s timeout on DNS resolving, 10s timeout on socket opening
-    # and 5s timeout on the TLS handshake, meaning the worst case should take
-    # about 16s in total
-
-    { connect: 5, read: 10, write: 10 }
-  end
-
   def http_client
-    @http_client ||= HTTP.use(:auto_inflate).timeout(:per_operation, timeout).follow(max_hops: 2)
+    @http_client ||= Request.http_client
   end
 
   def use_proxy?
@@ -169,20 +180,41 @@ class Request
         return super(host, *args) if thru_hidden_service?(host)
 
         outer_e = nil
+        port    = args.first
 
         Resolv::DNS.open do |dns|
           dns.timeouts = 5
 
           addresses = dns.getaddresses(host).take(2)
-          time_slot = 10.0 / addresses.size
 
           addresses.each do |address|
             begin
               raise Mastodon::HostValidationError if PrivateAddressCheck.private_address?(IPAddr.new(address.to_s))
 
-              ::Timeout.timeout(time_slot, HTTP::TimeoutError) do
-                return super(address.to_s, *args)
+              sock     = ::Socket.new(::Socket::AF_INET, ::Socket::SOCK_STREAM, 0)
+              sockaddr = ::Socket.pack_sockaddr_in(port, address.to_s)
+
+              sock.setsockopt(::Socket::IPPROTO_TCP, ::Socket::TCP_NODELAY, 1)
+
+              begin
+                sock.connect_nonblock(sockaddr)
+              rescue IO::WaitWritable
+                if IO.select(nil, [sock], nil, Request::TIMEOUT[:connect])
+                  begin
+                    sock.connect_nonblock(sockaddr)
+                  rescue Errno::EISCONN
+                    # Yippee!
+                  rescue
+                    sock.close
+                    raise
+                  end
+                else
+                  sock.close
+                  raise HTTP::TimeoutError, "Connect timed out after #{Request::TIMEOUT[:connect]} seconds"
+                end
               end
+
+              return sock
             rescue => e
               outer_e = e
             end
diff --git a/app/lib/request_pool.rb b/app/lib/request_pool.rb
new file mode 100644
index 000000000..e5899a79a
--- /dev/null
+++ b/app/lib/request_pool.rb
@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+
+require_relative './connection_pool/shared_connection_pool'
+
+class RequestPool
+  def self.current
+    @current ||= RequestPool.new
+  end
+
+  class Reaper
+    attr_reader :pool, :frequency
+
+    def initialize(pool, frequency)
+      @pool      = pool
+      @frequency = frequency
+    end
+
+    def run
+      return unless frequency&.positive?
+
+      Thread.new(frequency, pool) do |t, p|
+        loop do
+          sleep t
+          p.flush
+        end
+      end
+    end
+  end
+
+  MAX_IDLE_TIME = 30
+  WAIT_TIMEOUT  = 5
+  MAX_POOL_SIZE = ENV.fetch('MAX_REQUEST_POOL_SIZE', 512).to_i
+
+  class Connection
+    attr_reader :site, :last_used_at, :created_at, :in_use, :dead, :fresh
+
+    def initialize(site)
+      @site         = site
+      @http_client  = http_client
+      @last_used_at = nil
+      @created_at   = current_time
+      @dead         = false
+      @fresh        = true
+    end
+
+    def use
+      @last_used_at = current_time
+      @in_use       = true
+
+      retries = 0
+
+      begin
+        yield @http_client
+      rescue HTTP::ConnectionError
+        # It's possible the connection was closed, so let's
+        # try re-opening it once
+
+        close
+
+        if @fresh || retries.positive?
+          raise
+        else
+          @http_client = http_client
+          retries     += 1
+          retry
+        end
+      rescue StandardError
+        # If this connection raises errors of any kind, it's
+        # better if it gets reaped as soon as possible
+
+        close
+        @dead = true
+        raise
+      end
+    ensure
+      @fresh  = false
+      @in_use = false
+    end
+
+    def seconds_idle
+      current_time - (@last_used_at || @created_at)
+    end
+
+    def close
+      @http_client.close
+    end
+
+    private
+
+    def http_client
+      Request.http_client.persistent(@site, timeout: MAX_IDLE_TIME)
+    end
+
+    def current_time
+      Process.clock_gettime(Process::CLOCK_MONOTONIC)
+    end
+  end
+
+  def initialize
+    @pool   = ConnectionPool::SharedConnectionPool.new(size: MAX_POOL_SIZE, timeout: WAIT_TIMEOUT) { |site| Connection.new(site) }
+    @reaper = Reaper.new(self, 30)
+    @reaper.run
+  end
+
+  def with(site, &block)
+    @pool.with(site) do |connection|
+      ActiveSupport::Notifications.instrument('with.request_pool', miss: connection.fresh, host: connection.site) do
+        connection.use(&block)
+      end
+    end
+  end
+
+  delegate :size, :flush, to: :@pool
+end
diff --git a/app/lib/sidekiq_error_handler.rb b/app/lib/sidekiq_error_handler.rb
index 23785cf05..8eb6b942d 100644
--- a/app/lib/sidekiq_error_handler.rb
+++ b/app/lib/sidekiq_error_handler.rb
@@ -3,9 +3,11 @@
 class SidekiqErrorHandler
   def call(*)
     yield
-  rescue Mastodon::HostValidationError => e
-    Rails.logger.error "#{e.class}: #{e.message}"
-    Rails.logger.error e.backtrace.join("\n")
+  rescue Mastodon::HostValidationError
     # Do not retry
+  ensure
+    socket = Thread.current[:statsd_socket]
+    socket&.close
+    Thread.current[:statsd_socket] = nil
   end
 end
diff --git a/app/models/concerns/attachmentable.rb b/app/models/concerns/attachmentable.rb
index 24f5968de..7c78bb456 100644
--- a/app/models/concerns/attachmentable.rb
+++ b/app/models/concerns/attachmentable.rb
@@ -60,7 +60,9 @@ module Attachmentable
   end
 
   def calculated_content_type(attachment)
-    Paperclip.run('file', '-b --mime :file', file: attachment.queued_for_write[:original].path).split(/[:;\s]+/).first.chomp
+    content_type = Paperclip.run('file', '-b --mime :file', file: attachment.queued_for_write[:original].path).split(/[:;\s]+/).first.chomp
+    content_type = 'video/mp4' if content_type == 'video/x-m4v'
+    content_type
   rescue Terrapin::CommandLineError
     ''
   end
diff --git a/app/models/custom_filter.rb b/app/models/custom_filter.rb
index 342207a55..382562fb8 100644
--- a/app/models/custom_filter.rb
+++ b/app/models/custom_filter.rb
@@ -35,6 +35,13 @@ class CustomFilter < ApplicationRecord
   before_validation :clean_up_contexts
   after_commit :remove_cache
 
+  def expires_in
+    return @expires_in if defined?(@expires_in)
+    return nil if expires_at.nil?
+
+    [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week].find { |expires_in| expires_in.from_now >= expires_at }
+  end
+
   private
 
   def clean_up_contexts
diff --git a/app/services/activitypub/process_account_service.rb b/app/services/activitypub/process_account_service.rb
index 05c017bdf..3857e7c16 100644
--- a/app/services/activitypub/process_account_service.rb
+++ b/app/services/activitypub/process_account_service.rb
@@ -15,6 +15,8 @@ class ActivityPub::ProcessAccountService < BaseService
     @domain      = domain
     @collections = {}
 
+    return if auto_suspend?
+
     RedisLock.acquire(lock_options) do |lock|
       if lock.acquired?
         @account        = Account.find_remote(@username, @domain)
@@ -55,7 +57,7 @@ class ActivityPub::ProcessAccountService < BaseService
     @account.domain       = @domain
     @account.private_key  = nil
     @account.suspended_at = domain_block.created_at if auto_suspend?
-    @account.silenced_at = domain_block.created_at if auto_silence?
+    @account.silenced_at  = domain_block.created_at if auto_silence?
   end
 
   def update_account
diff --git a/app/services/resolve_account_service.rb b/app/services/resolve_account_service.rb
index 57c9ccfe1..e557706da 100644
--- a/app/services/resolve_account_service.rb
+++ b/app/services/resolve_account_service.rb
@@ -48,7 +48,7 @@ class ResolveAccountService < BaseService
       return
     end
 
-    return if links_missing?
+    return if links_missing? || auto_suspend?
     return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
 
     RedisLock.acquire(lock_options) do |lock|
diff --git a/app/workers/activitypub/delivery_worker.rb b/app/workers/activitypub/delivery_worker.rb
index 5e4c391f0..818fd8f5d 100644
--- a/app/workers/activitypub/delivery_worker.rb
+++ b/app/workers/activitypub/delivery_worker.rb
@@ -17,6 +17,7 @@ class ActivityPub::DeliveryWorker
     @json           = json
     @source_account = Account.find(source_account_id)
     @inbox_url      = inbox_url
+    @host           = Addressable::URI.parse(inbox_url).normalized_site
 
     perform_request
 
@@ -28,16 +29,18 @@ class ActivityPub::DeliveryWorker
 
   private
 
-  def build_request
-    request = Request.new(:post, @inbox_url, body: @json)
+  def build_request(http_client)
+    request = Request.new(:post, @inbox_url, body: @json, http_client: http_client)
     request.on_behalf_of(@source_account, :uri, sign_with: @options[:sign_with])
     request.add_headers(HEADERS)
   end
 
   def perform_request
     light = Stoplight(@inbox_url) do
-      build_request.perform do |response|
-        raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response)
+      request_pool.with(@host) do |http_client|
+        build_request(http_client).perform do |response|
+          raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response)
+        end
       end
     end
 
@@ -51,10 +54,14 @@ class ActivityPub::DeliveryWorker
   end
 
   def response_error_unsalvageable?(response)
-    (400...500).cover?(response.code) && ![401, 408, 429].include?(response.code)
+    response.code == 501 || ((400...500).cover?(response.code) && ![401, 408, 429].include?(response.code))
   end
 
   def failure_tracker
     @failure_tracker ||= DeliveryFailureTracker.new(@inbox_url)
   end
+
+  def request_pool
+    RequestPool.current
+  end
 end
diff --git a/config/initializers/instrumentation.rb b/config/initializers/instrumentation.rb
deleted file mode 100644
index 8483f2be2..000000000
--- a/config/initializers/instrumentation.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-# frozen_string_literal: true
-
-instrumentation_hostname = ENV.fetch('INSTRUMENTATION_HOSTNAME') { 'localhost' }
-
-ActiveSupport::Notifications.subscribe(/process_action.action_controller/) do |*args|
-  event      = ActiveSupport::Notifications::Event.new(*args)
-  controller = event.payload[:controller]
-  action     = event.payload[:action]
-  format     = event.payload[:format] || 'all'
-  format     = 'all' if format == '*/*'
-  status     = event.payload[:status]
-  key        = "#{controller}.#{action}.#{format}.#{instrumentation_hostname}"
-
-  ActiveSupport::Notifications.instrument :performance, action: :measure, measurement: "#{key}.total_duration", value: event.duration
-  ActiveSupport::Notifications.instrument :performance, action: :measure, measurement: "#{key}.db_time", value: event.payload[:db_runtime]
-  ActiveSupport::Notifications.instrument :performance, action: :measure, measurement: "#{key}.view_time", value: event.payload[:view_runtime]
-  ActiveSupport::Notifications.instrument :performance, measurement: "#{key}.status.#{status}"
-end
diff --git a/config/initializers/statsd.rb b/config/initializers/statsd.rb
index ce83fd9de..93ea1d1e4 100644
--- a/config/initializers/statsd.rb
+++ b/config/initializers/statsd.rb
@@ -3,10 +3,10 @@
 if ENV['STATSD_ADDR'].present?
   host, port = ENV['STATSD_ADDR'].split(':')
 
-  statsd = ::Statsd.new(host, port)
-  statsd.namespace = ENV.fetch('STATSD_NAMESPACE') { ['Mastodon', Rails.env].join('.') }
+  $statsd = ::Statsd.new(host, port)
+  $statsd.namespace = ENV.fetch('STATSD_NAMESPACE') { ['Mastodon', Rails.env].join('.') }
 
-  ::NSA.inform_statsd(statsd) do |informant|
+  ::NSA.inform_statsd($statsd) do |informant|
     informant.collect(:action_controller, :web)
     informant.collect(:active_record, :db)
     informant.collect(:active_support_cache, :cache)
diff --git a/package.json b/package.json
index c1a6a3b9b..0a4542169 100644
--- a/package.json
+++ b/package.json
@@ -164,7 +164,7 @@
     "webpack": "^4.34.0",
     "webpack-assets-manifest": "^3.1.1",
     "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-cli": "^3.3.4",
+    "webpack-cli": "^3.3.5",
     "webpack-merge": "^4.2.1",
     "websocket.js": "^0.1.12"
   },
@@ -176,7 +176,7 @@
     "eslint": "^5.16.0",
     "eslint-plugin-import": "~2.17.3",
     "eslint-plugin-jsx-a11y": "~6.2.1",
-    "eslint-plugin-promise": "~4.1.1",
+    "eslint-plugin-promise": "~4.2.1",
     "eslint-plugin-react": "~7.12.1",
     "jest": "^24.8.0",
     "raf": "^3.4.1",
diff --git a/spec/lib/connection_pool/shared_connection_pool_spec.rb b/spec/lib/connection_pool/shared_connection_pool_spec.rb
new file mode 100644
index 000000000..114464558
--- /dev/null
+++ b/spec/lib/connection_pool/shared_connection_pool_spec.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ConnectionPool::SharedConnectionPool do
+  class MiniConnection
+    attr_reader :site
+
+    def initialize(site)
+      @site = site
+    end
+  end
+
+  subject { described_class.new(size: 5, timeout: 5) { |site| MiniConnection.new(site) } }
+
+  describe '#with' do
+    it 'runs a block with a connection' do
+      block_run = false
+
+      subject.with('foo') do |connection|
+        expect(connection).to be_a MiniConnection
+        block_run = true
+      end
+
+      expect(block_run).to be true
+    end
+  end
+end
diff --git a/spec/lib/connection_pool/shared_timed_stack_spec.rb b/spec/lib/connection_pool/shared_timed_stack_spec.rb
new file mode 100644
index 000000000..f680c5966
--- /dev/null
+++ b/spec/lib/connection_pool/shared_timed_stack_spec.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ConnectionPool::SharedTimedStack do
+  class MiniConnection
+    attr_reader :site
+
+    def initialize(site)
+      @site = site
+    end
+  end
+
+  subject { described_class.new(5) { |site| MiniConnection.new(site) } }
+
+  describe '#push' do
+    it 'keeps the connection in the stack' do
+      subject.push(MiniConnection.new('foo'))
+      expect(subject.size).to eq 1
+    end
+  end
+
+  describe '#pop' do
+    it 'returns a connection' do
+      expect(subject.pop('foo')).to be_a MiniConnection
+    end
+
+    it 'returns the same connection that was pushed in' do
+      connection = MiniConnection.new('foo')
+      subject.push(connection)
+      expect(subject.pop('foo')).to be connection
+    end
+
+    it 'does not create more than maximum amount of connections' do
+      expect { 6.times { subject.pop('foo', 0) } }.to raise_error Timeout::Error
+    end
+
+    it 'repurposes a connection for a different site when maximum amount is reached' do
+      5.times { subject.push(MiniConnection.new('foo')) }
+      expect(subject.pop('bar')).to be_a MiniConnection
+    end
+  end
+
+  describe '#empty?' do
+    it 'returns true when no connections on the stack' do
+      expect(subject.empty?).to be true
+    end
+
+    it 'returns false when there are connections on the stack' do
+      subject.push(MiniConnection.new('foo'))
+      expect(subject.empty?).to be false
+    end
+  end
+
+  describe '#size' do
+    it 'returns the number of connections on the stack' do
+      2.times { subject.push(MiniConnection.new('foo')) }
+      expect(subject.size).to eq 2
+    end
+  end
+end
diff --git a/spec/lib/request_pool_spec.rb b/spec/lib/request_pool_spec.rb
new file mode 100644
index 000000000..4a144d7c7
--- /dev/null
+++ b/spec/lib/request_pool_spec.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RequestPool do
+  subject { described_class.new }
+
+  describe '#with' do
+    it 'returns a HTTP client for a host' do
+      subject.with('http://example.com') do |http_client|
+        expect(http_client).to be_a HTTP::Client
+      end
+    end
+
+    it 'returns the same instance of HTTP client within the same thread for the same host' do
+      test_client = nil
+
+      subject.with('http://example.com') { |http_client| test_client = http_client }
+      expect(test_client).to_not be_nil
+      subject.with('http://example.com') { |http_client| expect(http_client).to be test_client }
+    end
+
+    it 'returns different HTTP clients for different hosts' do
+      test_client = nil
+
+      subject.with('http://example.com') { |http_client| test_client = http_client }
+      expect(test_client).to_not be_nil
+      subject.with('http://example.org') { |http_client| expect(http_client).to_not be test_client }
+    end
+
+    it 'grows to the number of threads accessing it' do
+      stub_request(:get, 'http://example.com/').to_return(status: 200, body: 'Hello!')
+
+      subject
+
+      threads = 20.times.map do |i|
+        Thread.new do
+          20.times do
+            subject.with('http://example.com') do |http_client|
+              http_client.get('/').flush
+            end
+          end
+        end
+      end
+
+      threads.map(&:join)
+
+      expect(subject.size).to be > 1
+    end
+
+    it 'closes idle connections' do
+      stub_request(:get, 'http://example.com/').to_return(status: 200, body: 'Hello!')
+
+      subject.with('http://example.com') do |http_client|
+        http_client.get('/').flush
+      end
+
+      expect(subject.size).to eq 1
+      sleep RequestPool::MAX_IDLE_TIME + 30 + 1
+      expect(subject.size).to eq 0
+    end
+  end
+end
diff --git a/yarn.lock b/yarn.lock
index a7d98fe3a..a1b9f4c2b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2274,6 +2274,15 @@ caseless@~0.12.0:
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
   integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
 
+chalk@2.4.2, chalk@^2.0, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.2, chalk@^2.4.1, chalk@^2.4.2:
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
+  integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
+  dependencies:
+    ansi-styles "^3.2.1"
+    escape-string-regexp "^1.0.5"
+    supports-color "^5.3.0"
+
 chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
@@ -2285,15 +2294,6 @@ chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0, chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.2, chalk@^2.4.1, chalk@^2.4.2:
-  version "2.4.2"
-  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
-  integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
-  dependencies:
-    ansi-styles "^3.2.1"
-    escape-string-regexp "^1.0.5"
-    supports-color "^5.3.0"
-
 chardet@^0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
@@ -2408,6 +2408,15 @@ cliui@^4.0.0:
     strip-ansi "^4.0.0"
     wrap-ansi "^2.0.0"
 
+cliui@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/cliui/-/cliui-5.0.0.tgz#deefcfdb2e800784aa34f46fa08e06851c7bbbc5"
+  integrity sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==
+  dependencies:
+    string-width "^3.1.0"
+    strip-ansi "^5.2.0"
+    wrap-ansi "^5.1.0"
+
 clone-deep@^2.0.1:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/clone-deep/-/clone-deep-2.0.2.tgz#00db3a1e173656730d1188c3d6aced6d7ea97713"
@@ -2741,7 +2750,7 @@ cross-env@^5.1.4:
     cross-spawn "^6.0.5"
     is-windows "^1.0.0"
 
-cross-spawn@^6.0.0, cross-spawn@^6.0.5:
+cross-spawn@6.0.5, cross-spawn@^6.0.0, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
   integrity sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==
@@ -3428,7 +3437,7 @@ end-of-stream@^1.0.0, end-of-stream@^1.1.0:
   dependencies:
     once "^1.4.0"
 
-enhanced-resolve@^4.1.0:
+enhanced-resolve@4.1.0, enhanced-resolve@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-4.1.0.tgz#41c7e0bfdfe74ac1ffe1e57ad6a5c6c9f3742a7f"
   integrity sha512-F/7vkyTtyc/llOIn8oWclcB25KdRaiPBpZYDgJHgh/UHtpgT2p2eldQgtQnLtUvfMKPKxbRaQM/hHkvLHt1Vng==
@@ -3688,10 +3697,10 @@ eslint-plugin-jsx-a11y@~6.2.1:
     has "^1.0.3"
     jsx-ast-utils "^2.0.1"
 
-eslint-plugin-promise@~4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-promise/-/eslint-plugin-promise-4.1.1.tgz#1e08cb68b5b2cd8839f8d5864c796f56d82746db"
-  integrity sha512-faAHw7uzlNPy7b45J1guyjazw28M+7gJokKUjC5JSFoYfUEyy6Gw/i7YQvmv2Yk00sUjWcmzXQLpU1Ki/C2IZQ==
+eslint-plugin-promise@~4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-promise/-/eslint-plugin-promise-4.2.1.tgz#845fd8b2260ad8f82564c1222fce44ad71d9418a"
+  integrity sha512-VoM09vT7bfA7D+upt+FjeBO5eHIJQBUWki1aPvB+vbNiHS3+oGIJGIeyBtKQTME6UPXXy3vV07OL1tHd3ANuDw==
 
 eslint-plugin-react@~7.12.1:
   version "7.12.1"
@@ -4208,13 +4217,13 @@ find-up@^3.0.0:
   dependencies:
     locate-path "^3.0.0"
 
-findup-sync@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/findup-sync/-/findup-sync-2.0.0.tgz#9326b1488c22d1a6088650a86901b2d9a90a2cbc"
-  integrity sha1-kyaxSIwi0aYIhlCoaQGy2akKLLw=
+findup-sync@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/findup-sync/-/findup-sync-3.0.0.tgz#17b108f9ee512dfb7a5c7f3c8b27ea9e1a9c08d1"
+  integrity sha512-YbffarhcicEhOrm4CtrwdKBdCuz576RLdhJDsIfvNtxUuhdRet1qZcsMjqbePtAseKdAnDyM/IyXbu7PRPRLYg==
   dependencies:
     detect-file "^1.0.0"
-    is-glob "^3.1.0"
+    is-glob "^4.0.0"
     micromatch "^3.0.4"
     resolve-dir "^1.0.1"
 
@@ -4437,6 +4446,11 @@ get-caller-file@^1.0.1:
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.3.tgz#f978fa4c90d1dfe7ff2d6beda2a515e713bdcf4a"
   integrity sha512-3t6rVToeoZfYSGd8YoLFR2DJkiQrIiUrGcjvFX2mDw3bn6k2OtwHN0TNCLbBO+w8qTvimhDkv+LSscbJY1vE6w==
 
+get-caller-file@^2.0.1:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
+  integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
+
 get-stream@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-4.1.0.tgz#c1b255575f3dc21d59bfc79cd3d2b46b1c3a54b5"
@@ -4476,6 +4490,13 @@ glob@^7.0.0, glob@^7.0.3, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@~7.1.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+global-modules@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/global-modules/-/global-modules-2.0.0.tgz#997605ad2345f27f51539bea26574421215c7780"
+  integrity sha512-NGbfmJBp9x8IxyJSd1P+otYK8vonoJactOogrVfFRIAEY1ukil8RSKDz2Yo7wh1oihl51l/r6W4epkeKJHqL8A==
+  dependencies:
+    global-prefix "^3.0.0"
+
 global-modules@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/global-modules/-/global-modules-1.0.0.tgz#6d770f0eb523ac78164d72b5e71a8877265cc3ea"
@@ -4496,6 +4517,15 @@ global-prefix@^1.0.1:
     is-windows "^1.0.1"
     which "^1.2.14"
 
+global-prefix@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/global-prefix/-/global-prefix-3.0.0.tgz#fc85f73064df69f50421f47f883fe5b913ba9b97"
+  integrity sha512-awConJSVCHVGND6x3tmMaKcQvwXLhjdkmomy2W+Goaui8YPgYgXJZewhg3fWC+DlfqqQuWg8AwqjGTD2nAPVWg==
+  dependencies:
+    ini "^1.3.5"
+    kind-of "^6.0.2"
+    which "^1.3.1"
+
 globals@^11.1.0, globals@^11.7.0:
   version "11.12.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
@@ -4921,7 +4951,7 @@ import-from@^2.1.0:
   dependencies:
     resolve-from "^3.0.0"
 
-import-local@^2.0.0:
+import-local@2.0.0, import-local@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-local/-/import-local-2.0.0.tgz#55070be38a5993cf18ef6db7e961f5bee5c5a09d"
   integrity sha512-b6s04m3O+s3CGSbqDIyP4R6aAwAeYlVq9+WUWep6iHa8ETRf9yei1U48C5MmfJmV9AiLYYBKPMq/W+/WRpQmCQ==
@@ -4970,7 +5000,7 @@ inherits@2.0.1:
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
   integrity sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=
 
-ini@^1.3.4, ini@~1.3.0:
+ini@^1.3.4, ini@^1.3.5, ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
   integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
@@ -5021,7 +5051,7 @@ internal-ip@^4.3.0:
     default-gateway "^4.2.0"
     ipaddr.js "^1.9.0"
 
-interpret@^1.1.0:
+interpret@1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.2.0.tgz#d5061a6224be58e8083985f5014d844359576296"
   integrity sha512-mT34yGKMNceBQUoVn7iCDKDntA7SC6gycMAWzGx1z/CMCTV7b2AAtXlo3nRyHZ1FelRkQbQjprHSYGwzLtkVbw==
@@ -6119,7 +6149,7 @@ loader-utils@0.2.x:
     json5 "^0.5.0"
     object-assign "^4.0.1"
 
-loader-utils@^1.0.1, loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2.2, loader-utils@^1.2.3:
+loader-utils@1.2.3, loader-utils@^1.0.1, loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2.2, loader-utils@^1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-1.2.3.tgz#1ff5dc6911c9f0a062531a4c04b609406108c2c7"
   integrity sha512-fkpz8ejdnEMG3s37wGL07iSBDg99O9D5yflE9RGNH3hRdx9SOwYfnGYdZOUIZitN8E+E2vkq3MUMYMvPYl5ZZA==
@@ -7034,7 +7064,7 @@ os-homedir@^1.0.0:
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
   integrity sha1-/7xJiDNuDoM94MFox+8VISGqf7M=
 
-os-locale@^3.0.0:
+os-locale@^3.0.0, os-locale@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-3.1.0.tgz#a802a6ee17f24c10483ab9935719cef4ed16bf1a"
   integrity sha512-Z8l3R4wYWM40/52Z+S265okfFj8Kt2cC2MKY+xNi3kFs+XGI7WXu/I309QQQYbRW4ijiZ+yxs9pqEhJh0DqW3Q==
@@ -7831,11 +7861,6 @@ prepend-http@^1.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
   integrity sha1-1PRWKwzjaW5BrFLQ4ALlemNdxtw=
 
-prettier@^1.17.0:
-  version "1.18.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
-  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
-
 pretty-format@^24.8.0:
   version "24.8.0"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-24.8.0.tgz#8dae7044f58db7cb8be245383b565a963e3c27f2"
@@ -8650,6 +8675,11 @@ require-main-filename@^1.0.1:
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"
   integrity sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=
 
+require-main-filename@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-2.0.0.tgz#d0b329ecc7cc0f61649f62215be69af54aa8989b"
+  integrity sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==
+
 require-package-name@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/require-package-name/-/require-package-name-2.0.1.tgz#c11e97276b65b8e2923f75dabf5fb2ef0c3841b9"
@@ -9411,7 +9441,7 @@ string-width@^1.0.1:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
-string-width@^3.0.0:
+string-width@^3.0.0, string-width@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-3.1.0.tgz#22767be21b62af1081574306f69ac51b62203961"
   integrity sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==
@@ -9464,7 +9494,7 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
-strip-ansi@^5.0.0, strip-ansi@^5.1.0:
+strip-ansi@^5.0.0, strip-ansi@^5.1.0, strip-ansi@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-5.2.0.tgz#8c9a536feb6afc962bdfa5b104a5091c1ad9c0ae"
   integrity sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==
@@ -9515,6 +9545,13 @@ substring-trie@^1.0.2:
   resolved "https://registry.yarnpkg.com/substring-trie/-/substring-trie-1.0.2.tgz#7b42592391628b4f2cb17365c6cce4257c7b7af5"
   integrity sha1-e0JZI5Fii08ssXNlxszkJXx7evU=
 
+supports-color@6.1.0, supports-color@^6.0.0, supports-color@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-6.1.0.tgz#0764abc69c63d5ac842dd4867e8d025e880df8f3"
+  integrity sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==
+  dependencies:
+    has-flag "^3.0.0"
+
 supports-color@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
@@ -9527,20 +9564,13 @@ supports-color@^3.2.3:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^5.3.0, supports-color@^5.5.0:
+supports-color@^5.3.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
   integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==
   dependencies:
     has-flag "^3.0.0"
 
-supports-color@^6.0.0, supports-color@^6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-6.1.0.tgz#0764abc69c63d5ac842dd4867e8d025e880df8f3"
-  integrity sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==
-  dependencies:
-    has-flag "^3.0.0"
-
 svgo@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/svgo/-/svgo-1.1.1.tgz#12384b03335bcecd85cfa5f4e3375fed671cb985"
@@ -10017,10 +10047,10 @@ uuid@^3.0.1, uuid@^3.1.0, uuid@^3.3.2:
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
   integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==
 
-v8-compile-cache@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-2.0.2.tgz#a428b28bb26790734c4fc8bc9fa106fccebf6a6c"
-  integrity sha512-1wFuMUIM16MDJRCrpbpuEPTUGmM5QMUg0cr3KFwra2XgOgFcPGDQHDh3CszSCD2Zewc/dh/pamNEW8CbfDebUw==
+v8-compile-cache@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-2.0.3.tgz#00f7494d2ae2b688cfe2899df6ed2c54bef91dbe"
+  integrity sha512-CNmdbwQMBjwr9Gsmohvm0pbL954tJrNzf6gWL3K+QMQf00PF7ERGrEiLgjuU3mKreLC2MeGhUsNV9ybTbLgd3w==
 
 validate-npm-package-license@^3.0.1:
   version "3.0.4"
@@ -10142,23 +10172,22 @@ webpack-bundle-analyzer@^3.3.2:
     opener "^1.5.1"
     ws "^6.0.0"
 
-webpack-cli@^3.3.4:
-  version "3.3.4"
-  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.4.tgz#de27e281c48a897b8c219cb093e261d5f6afe44a"
-  integrity sha512-ubJGQEKMtBSpT+LiL5hXvn2GIOWiRWItR1DGUqJRhwRBeGhpRXjvF5f0erqdRJLErkfqS5/Ldkkedh4AL5Q1ZQ==
-  dependencies:
-    chalk "^2.4.1"
-    cross-spawn "^6.0.5"
-    enhanced-resolve "^4.1.0"
-    findup-sync "^2.0.0"
-    global-modules "^1.0.0"
-    import-local "^2.0.0"
-    interpret "^1.1.0"
-    loader-utils "^1.1.0"
-    prettier "^1.17.0"
-    supports-color "^5.5.0"
-    v8-compile-cache "^2.0.2"
-    yargs "^12.0.5"
+webpack-cli@^3.3.5:
+  version "3.3.5"
+  resolved "https://registry.yarnpkg.com/webpack-cli/-/webpack-cli-3.3.5.tgz#f4d1238a66a2843d9cebf189835ea22142e72767"
+  integrity sha512-w0j/s42c5UhchwTmV/45MLQnTVwRoaUTu9fM5LuyOd/8lFoCNCELDogFoecx5NzRUndO0yD/gF2b02XKMnmAWQ==
+  dependencies:
+    chalk "2.4.2"
+    cross-spawn "6.0.5"
+    enhanced-resolve "4.1.0"
+    findup-sync "3.0.0"
+    global-modules "2.0.0"
+    import-local "2.0.0"
+    interpret "1.2.0"
+    loader-utils "1.2.3"
+    supports-color "6.1.0"
+    v8-compile-cache "2.0.3"
+    yargs "13.2.4"
 
 webpack-dev-middleware@^3.7.0:
   version "3.7.0"
@@ -10320,7 +10349,7 @@ which-module@^2.0.0:
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
   integrity sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=
 
-which@^1.2.14, which@^1.2.9, which@^1.3.0:
+which@^1.2.14, which@^1.2.9, which@^1.3.0, which@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
   integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==
@@ -10359,6 +10388,15 @@ wrap-ansi@^2.0.0:
     string-width "^1.0.1"
     strip-ansi "^3.0.1"
 
+wrap-ansi@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-5.1.0.tgz#1fd1f67235d5b6d0fee781056001bfb694c03b09"
+  integrity sha512-QC1/iN/2/RPVJ5jYK8BGttj5z83LmSKmvbvrXPNCLZSEb32KKVDJDl/MOt2N01qU2H/FkzEa9PKto1BqDjtd7Q==
+  dependencies:
+    ansi-styles "^3.2.0"
+    string-width "^3.0.0"
+    strip-ansi "^5.0.0"
+
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
@@ -10429,6 +10467,14 @@ yargs-parser@^11.1.1:
     camelcase "^5.0.0"
     decamelize "^1.2.0"
 
+yargs-parser@^13.1.0:
+  version "13.1.1"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-13.1.1.tgz#d26058532aa06d365fe091f6a1fc06b2f7e5eca0"
+  integrity sha512-oVAVsHz6uFrg3XQheFII8ESO2ssAf9luWuAd6Wexsu4F3OtIW0o8IribPXYrD4WC24LWtPrJlGy87y5udK+dxQ==
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
+
 yargs@12.0.5, yargs@^12.0.2, yargs@^12.0.5:
   version "12.0.5"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-12.0.5.tgz#05f5997b609647b64f66b81e3b4b10a368e7ad13"
@@ -10446,3 +10492,20 @@ yargs@12.0.5, yargs@^12.0.2, yargs@^12.0.5:
     which-module "^2.0.0"
     y18n "^3.2.1 || ^4.0.0"
     yargs-parser "^11.1.1"
+
+yargs@13.2.4:
+  version "13.2.4"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-13.2.4.tgz#0b562b794016eb9651b98bd37acf364aa5d6dc83"
+  integrity sha512-HG/DWAJa1PAnHT9JAhNa8AbAv3FPaiLzioSjCcmuXXhP8MlpHO5vwls4g4j6n30Z74GVQj8Xa62dWVx1QCGklg==
+  dependencies:
+    cliui "^5.0.0"
+    find-up "^3.0.0"
+    get-caller-file "^2.0.1"
+    os-locale "^3.1.0"
+    require-directory "^2.1.1"
+    require-main-filename "^2.0.0"
+    set-blocking "^2.0.0"
+    string-width "^3.0.0"
+    which-module "^2.0.0"
+    y18n "^4.0.0"
+    yargs-parser "^13.1.0"