Deprecate Sherlock tool

This removes most of the things related to Sherlock.
Dependent gems and docs will be removed separately.

.rubocop_todo.yml

@@ -325,7 +325,6 @@ Performance/Sum:
     - 'lib/container_registry/tag.rb'
     - 'lib/gitlab/ci/reports/test_suite_comparer.rb'
     - 'lib/gitlab/diff/file.rb'
-    - 'lib/gitlab/sherlock/transaction.rb'
     - 'lib/gitlab/usage_data.rb'
     - 'lib/peek/views/detailed_view.rb'
     - 'spec/models/namespace/root_storage_statistics_spec.rb'

.rubocop_todo/database/multiple_databases.yml

@@ -26,7 +26,6 @@ Database/MultipleDatabases:
   - lib/gitlab/import_export/group/relation_tree_restorer.rb
   - lib/gitlab/legacy_github_import/importer.rb
   - lib/gitlab/seeder.rb
-  - lib/gitlab/sherlock/query.rb
   - lib/system_check/orphans/repository_check.rb
   - spec/db/schema_spec.rb
   - spec/initializers/database_config_spec.rb

.rubocop_todo/rails/time_zone.yml

@@ -76,7 +76,6 @@ Rails/TimeZone:
   - lib/gitlab/prometheus/queries/additional_metrics_environment_query.rb
   - lib/gitlab/prometheus/queries/matched_metric_query.rb
   - lib/gitlab/prometheus_client.rb
-  - lib/gitlab/sherlock/transaction.rb
   - lib/gitlab/task_helpers.rb
   - lib/gitlab/x509/tag.rb
   - lib/grafana/time_window.rb
@@ -141,7 +140,6 @@ Rails/TimeZone:
   - spec/lib/gitlab/prometheus/queries/additional_metrics_deployment_query_spec.rb
   - spec/lib/gitlab/prometheus/queries/deployment_query_spec.rb
   - spec/lib/gitlab/prometheus/queries/validate_query_spec.rb
-  - spec/lib/gitlab/sherlock/transaction_spec.rb
   - spec/lib/gitlab/sidekiq_logging/json_formatter_spec.rb
   - spec/lib/gitlab/sidekiq_middleware/duplicate_jobs/strategies/until_executing_spec.rb
   - spec/lib/gitlab/updated_notes_paginator_spec.rb

app/assets/stylesheets/_page_specific_files.scss

@@ -28,7 +28,6 @@
 @import './pages/service_desk';
 @import './pages/settings';
 @import './pages/settings_ci_cd';
-@import './pages/sherlock';
 @import './pages/storage_quota';
 @import './pages/tree';
 @import './pages/users';

app/assets/stylesheets/pages/sherlock.scss

-table .sherlock-code {
-  max-width: 700px;
-}
-
-.sherlock-code {
-  pre {
-    word-wrap: normal;
-
-    code {
-      white-space: pre;
-    }
-  }
-}
-
-.sherlock-line-samples-table {
-  thead th,
-  tbody td {
-    font-size: 13px !important;
-    text-align: right;
-    padding: 0 10px !important;
-  }
-
-  .slow {
-    color: $red-500;
-    font-weight: $gl-font-weight-bold;
-  }
-}
-
-.sherlock-file-sample pre {
-  padding-top: 28px !important;
-}

app/controllers/sherlock/application_controller.rb

-# frozen_string_literal: true
-
-module Sherlock
-  class ApplicationController < ::ApplicationController
-    before_action :find_transaction
-
-    def find_transaction
-      if params[:transaction_id]
-        @transaction = Gitlab::Sherlock.collection
-          .find_transaction(params[:transaction_id])
-      end
-    end
-  end
-end

app/controllers/sherlock/file_samples_controller.rb

-# frozen_string_literal: true
-
-module Sherlock
-  class FileSamplesController < Sherlock::ApplicationController
-    def show
-      @file_sample = @transaction.find_file_sample(params[:id])
-    end
-  end
-end

app/controllers/sherlock/queries_controller.rb

-# frozen_string_literal: true
-
-module Sherlock
-  class QueriesController < Sherlock::ApplicationController
-    def show
-      @query = @transaction.find_query(params[:id])
-    end
-  end
-end

app/controllers/sherlock/transactions_controller.rb

-# frozen_string_literal: true
-
-module Sherlock
-  class TransactionsController < Sherlock::ApplicationController
-    def index
-      @transactions = Gitlab::Sherlock.collection.newest_first
-    end
-
-    def show
-      @transaction = Gitlab::Sherlock.collection.find_transaction(params[:id])
-
-      render_404 unless @transaction
-    end
-
-    def destroy_all
-      Gitlab::Sherlock.collection.clear
-
-      redirect_back_or_default(options: { status: :found })
-    end
-  end
-end

app/helpers/nav/top_nav_helper.rb

@@ -189,15 +189,6 @@ def build_view_model(builder:, project:, group:)
         end
       end
       # rubocop: enable Cop/UserAdmin
-
-      if Gitlab::Sherlock.enabled?
-        builder.add_secondary_menu_item(
-          id: 'sherlock',
-          title: _('Sherlock Transactions'),
-          icon: 'admin',
-          href: sherlock_transactions_path
-        )
-      end
     end
 
     def projects_menu_item_attrs

app/helpers/nav_helper.rb

@@ -46,10 +46,6 @@ def user_dropdown_class
     class_names
   end
 
-  def has_extra_nav_icons?
-    Gitlab::Sherlock.enabled? || current_user.admin?
-  end
-
   def page_has_markdown?
     current_path?('merge_requests#show') ||
       current_path?('projects/merge_requests/conflicts#show') ||

app/views/sherlock/file_samples/show.html.haml

-- page_title t('sherlock.title'), t('sherlock.transaction'),
-  t('sherlock.file_sample')
-
-- header_title t('sherlock.title'), sherlock_transactions_path
-
-.row-content-block
-  .float-right
-    = link_to(sherlock_transaction_path(@transaction), class: 'btn gl-button') do
-      = sprite_icon('arrow-left')
-      = t('sherlock.transaction')
-  .oneline
-    = t('sherlock.file_sample')
-    = @file_sample.id
-
-.gl-mt-3
-  %p
-    %span.light
-      #{t('sherlock.time')}:
-    %strong
-      = @file_sample.duration.round(2)
-      = t('sherlock.milliseconds')
-  %p
-    %span.light
-      #{t('sherlock.events')}:
-    %strong
-      = @file_sample.events
-
-%article.file-holder
-  .js-file-title.file-title
-    = sprite_icon("doc-text")
-    %strong
-      = @file_sample.file
-  .code.file-content.js-syntax-highlight
-    .line-numbers
-      %table.sherlock-line-samples-table.gl-mb-0
-        %thead
-          %tr
-            %th= t('sherlock.line_capitalized')
-            %th= t('sherlock.events')
-            %th= t('sherlock.time')
-            %th= t('sherlock.percent')
-        %tbody
-          - @file_sample.line_samples.each_with_index do |sample, index|
-            %tr{ class: sample.majority_of?(@file_sample.duration) ? 'slow' : '' }
-              %td= index + 1
-              %td= sample.events
-              %td
-                = sample.duration.round(2)
-                = t('sherlock.milliseconds')
-              %td
-                = sample.percentage_of(@file_sample.duration).round
-                = t('sherlock.percent')
-
-    .sherlock-file-sample
-      = highlight(@file_sample.file, @file_sample.source)

app/views/sherlock/queries/_backtrace.html.haml

-.gl-mt-3
-  .card
-    .card-header
-      %strong
-        = t('sherlock.application_backtrace')
-    %ul.content-list
-      - @query.application_backtrace.each do |location|
-        %li
-          %strong
-            - if defined?(BetterErrors)
-              = link_to(location.path, BetterErrors.editor.url(location.path, location.line))
-            - else
-              = location.path
-          %small.light
-            = t('sherlock.line')
-            = location.line
-
-  .card
-    .card-header
-      %strong
-        = t('sherlock.full_backtrace')
-    %ul.content-list
-      - @query.backtrace.each do |location|
-        %li
-          - if location.application?
-            %strong= location.path
-          - else
-            = location.path
-          %small.light
-            = t('sherlock.line')
-            = location.line

app/views/sherlock/queries/_general.html.haml

-.gl-mt-3
-  .card
-    .card-header
-      %strong
-        = t('sherlock.general')
-    %ul.content-list
-      %li
-        %span.light
-          #{t('sherlock.time')}:
-        %strong
-          = @query.duration.round(4)
-          = t('sherlock.milliseconds')
-      %li
-        - frame = @query.last_application_frame
-        %span.light
-          #{t('sherlock.origin')}:
-        %strong
-          - if defined?(BetterErrors)
-            = link_to(frame.path, BetterErrors.editor.url(frame.path, frame.line))
-          - else
-            = frame.path
-        %small.light
-          = t('sherlock.line')
-          = frame.line
-
-  .card
-    .card-header
-      .float-right
-        %button.js-clipboard-trigger.gl-button.btn.btn-default.btn-sm{ title: t('sherlock.copy_to_clipboard'), type: :button }
-          = sprite_icon('copy-to-clipboard')
-        %pre.hidden
-          = @query.formatted_query
-      %strong
-        = t('sherlock.query')
-    %ul.content-list
-      %li
-        .code.js-syntax-highlight.sherlock-code
-          :preserve
-            #{highlight("#{@query.id}.sql", @query.formatted_query, language: 'sql')}
-
-  .card
-    .card-header
-      .float-right
-        %button.js-clipboard-trigger.gl-button.btn.btn-default.btn-sm{ title: t('sherlock.copy_to_clipboard'), type: :button }
-          = sprite_icon('copy-to-clipboard')
-        %pre.hidden
-          = @query.explain
-      %strong
-        = t('sherlock.query_plan')
-    %ul.content-list
-      %li
-        .code.js-syntax-highlight.sherlock-code
-          %pre
-            %code= @query.explain

app/views/sherlock/queries/show.html.haml

-- page_title t('sherlock.title'), t('sherlock.transaction'), t('sherlock.query')
-- header_title t('sherlock.title'), sherlock_transactions_path
-
-%ul.nav-links.nav.nav-tabs
-  %li.active
-    %a{ href: "#tab-general", data: { toggle: "tab" } }
-      = t('sherlock.general')
-  %li
-    %a{ href: "#tab-backtrace", data: { toggle: "tab" } }
-      = t('sherlock.backtrace')
-
-.row-content-block
-  .float-right
-    = link_to(sherlock_transaction_path(@transaction), class: 'btn gl-button btn-default') do
-      = sprite_icon('arrow-left')
-      = t('sherlock.transaction')
-  .oneline
-    = t('sherlock.query')
-    = @query.id
-
-.tab-content
-  .tab-pane.active#tab-general
-    = render(partial: 'general')
-
-  .tab-pane#tab-backtrace
-    = render(partial: 'backtrace')

app/views/sherlock/transactions/_file_samples.html.haml

-- if @transaction.file_samples.empty?
-  .nothing-here-block
-    = t('sherlock.no_file_samples')
-- else
-  .table-holder
-    %table.table
-      %thead
-        %tr
-          %th= t('sherlock.time_inclusive')
-          %th= t('sherlock.count')
-          %th= t('sherlock.path')
-          %th
-      %tbody
-        - @transaction.sorted_file_samples.each do |sample|
-          %tr
-            %td
-              = sample.duration.round(2)
-              = t('sherlock.milliseconds')
-            %td= @transaction.view_counts.fetch(sample.file, 1)
-            %td= sample.relative_path
-            %td
-              = link_to(t('sherlock.view'),
-                sherlock_transaction_file_sample_path(@transaction, sample),
-                class: 'gl-button btn btn-sm')

app/views/sherlock/transactions/_general.html.haml

-.gl-mt-3
-  .card
-    .card-header
-      %strong
-        = t('sherlock.general')
-    %ul.content-list
-      %li
-        %span.light
-          #{t('sherlock.id')}:
-        %strong
-          = @transaction.id
-      %li
-        %span.light
-          #{t('sherlock.type')}:
-        %strong
-          = @transaction.type
-      %li
-        %span.light
-          #{t('sherlock.path')}:
-        %strong
-          = @transaction.path
-      %li
-        %span.light
-          #{t('sherlock.time')}:
-        %strong
-          = @transaction.duration.round(2)
-          = t('sherlock.seconds')
-      %li
-        %span.light
-          #{t('sherlock.query_time')}
-        %strong
-          = @transaction.query_duration.round(2)
-          = t('sherlock.seconds')
-      %li
-        %span.light
-          #{t('sherlock.finished_at')}:
-        %strong
-          = time_ago_with_tooltip @transaction.finished_at

app/views/sherlock/transactions/_queries.html.haml

-- if @transaction.queries.empty?
-  .nothing-here-block
-    = t('sherlock.no_queries')
-- else
-  .table-holder
-    %table.table#sherlock-queries
-      %thead
-        %tr
-          %th= t('sherlock.time')
-          %th= t('sherlock.query')
-          %th
-      %tbody
-        - @transaction.sorted_queries.each do |query|
-          %tr
-            %td
-              = query.duration.round(2)
-              = t('sherlock.milliseconds')
-            %td
-              .code.js-syntax-highlight.sherlock-code
-                = highlight("#{query.id}.sql", query.formatted_query, language: 'sql')
-            %td
-              = link_to(t('sherlock.view'),
-                sherlock_transaction_query_path(@transaction, query),
-                class: 'gl-button btn btn-sm')

app/views/sherlock/transactions/index.html.haml

-- page_title t('sherlock.title')
-- header_title t('sherlock.title'), sherlock_transactions_path
-
-.row-content-block
-  .float-right
-    = link_to(destroy_all_sherlock_transactions_path,
-      class: 'gl-button btn btn-danger',
-      method: :delete) do
-      = sprite_icon('remove')
-      = t('sherlock.delete_all_transactions')
-  .oneline= t('sherlock.introduction')
-
-- if @transactions.empty?
-  .nothing-here-block= t('sherlock.no_transactions')
-- else
-  .table-holder
-    %table.table
-      %thead
-        %tr
-          %th= t('sherlock.type')
-          %th= t('sherlock.path')
-          %th= t('sherlock.time')
-          %th= t('sherlock.queries')
-          %th= t('sherlock.finished_at')
-          %th
-      %tbody
-        - @transactions.each do |trans|
-          %tr
-            %td= trans.type
-            %td
-              %span{ title: trans.path }
-                = truncate(trans.path, length: 70)
-            %td
-              = trans.duration.round(2)
-              = t('sherlock.seconds')
-            %td= trans.queries.length
-            %td
-              = time_ago_with_tooltip trans.finished_at
-            %td
-              = link_to(sherlock_transaction_path(trans), class: 'gl-button btn btn-sm') do
-                = t('sherlock.view')

app/views/sherlock/transactions/show.html.haml

-- page_title t('sherlock.title'), t('sherlock.transaction')
-- header_title t('sherlock.title'), sherlock_transactions_path
-
-%ul.nav-links.nav.nav-tabs
-  %li.active
-    %a{ href: "#tab-general", data: { toggle: "tab" } }
-      = t('sherlock.general')
-  %li
-    %a{ href: "#tab-queries", data: { toggle: "tab" } }
-      = t('sherlock.queries')
-      = gl_badge_tag @transaction.queries.length.to_s
-  %li
-    %a{ href: "#tab-file-samples", data: { toggle: "tab" } }
-      = t('sherlock.file_samples')
-      = gl_badge_tag @transaction.file_samples.length.to_s
-
-.row-content-block
-  .float-right
-    = link_to(sherlock_transactions_path, class: 'gl-button btn') do
-      = sprite_icon('arrow-left', css_class: 'gl-mr-3')
-      = t('sherlock.all_transactions')
-  .oneline
-    = t('sherlock.transaction')
-    = @transaction.id
-
-.tab-content
-  .tab-pane.active#tab-general
-    = render(partial: 'general')
-
-  .tab-pane#tab-queries
-    = render(partial: 'queries')
-
-  .tab-pane#tab-file-samples
-    = render(partial: 'file_samples')