Add snippet git routes

In this commit we add the snippet git commit
routes that will allow us to perform git
operations on snippets.

It also refactors the Repositories controllers
to allow working with containers and making
them project agnostic.

app/controllers/repositories/git_http_client_controller.rb

@@ -6,7 +6,7 @@ module Repositories
     include KerberosSpnegoHelper
     include Gitlab::Utils::StrongMemoize
 
-    attr_reader :authentication_result, :redirected_path
+    attr_reader :authentication_result, :redirected_path, :container
 
     delegate :actor, :authentication_abilities, to: :authentication_result, allow_nil: true
     delegate :type, to: :authentication_result, allow_nil: true, prefix: :auth_result
@@ -81,7 +81,7 @@ module Repositories
     end
 
     def parse_repo_path
-      @project, @repo_type, @redirected_path = Gitlab::RepoPath.parse("#{params[:namespace_id]}/#{params[:repository_id]}")
+      @container, @project, @repo_type, @redirected_path = Gitlab::RepoPath.parse("#{params[:namespace_id]}/#{params[:repository_id]}")
     end
 
     def render_missing_personal_access_token
@@ -93,7 +93,7 @@ module Repositories
 
     def repository
       strong_memoize(:repository) do
-        repo_type.repository_for(project)
+        repo_type.repository_for(container)
       end
     end
 
@@ -117,7 +117,8 @@ module Repositories
     def http_download_allowed?
       Gitlab::ProtocolAccess.allowed?('http') &&
       download_request? &&
-      project && Guest.can?(:download_code, project)
+      container &&
+      Guest.can?(repo_type.guest_read_ability, container)
     end
   end
 end

app/controllers/repositories/git_http_controller.rb

@@ -84,10 +84,10 @@ module Repositories
     end
 
     def access
-      @access ||= access_klass.new(access_actor, project, 'http',
+      @access ||= access_klass.new(access_actor, container, 'http',
         authentication_abilities: authentication_abilities,
         namespace_path: params[:namespace_id],
-        project_path: project_path,
+        repository_path: repository_path,
         redirected_path: redirected_path,
         auth_result_type: auth_result_type)
     end
@@ -99,15 +99,18 @@ module Repositories
 
     def access_check
       access.check(git_command, Gitlab::GitAccess::ANY)
-      @project ||= access.project
+
+      if repo_type.project? && !container
+        @project = @container = access.project
+      end
     end
 
     def access_klass
       @access_klass ||= repo_type.access_checker_class
     end
 
-    def project_path
-      @project_path ||= params[:repository_id].sub(/\.git$/, '')
+    def repository_path
+      @repository_path ||= params[:repository_id].sub(/\.git$/, '')
     end
 
     def log_user_activity

app/models/snippet.rb

@@ -160,6 +160,10 @@ class Snippet < ApplicationRecord
     @link_reference_pattern ||= super("snippets", /(?<snippet>\d+)/)
   end
 
+  def self.find_by_id_and_project(id:, project:)
+    Snippet.find_by(id: id, project: project)
+  end
+
   def initialize(attributes = {})
     # We can't use default_value_for because the database has a default
     # value of 0 for visibility_level. If someone attempts to create a

app/services/post_receive_service.rb

@@ -4,10 +4,11 @@
 #
 # Used for scheduling related jobs after a push action has been performed
 class PostReceiveService
-  attr_reader :user, :project, :params
+  attr_reader :user, :repository, :project, :params
 
-  def initialize(user, project, params)
+  def initialize(user, repository, project, params)
     @user = user
+    @repository = repository
     @project = project
     @params = params
   end
@@ -24,7 +25,7 @@ class PostReceiveService
 
     mr_options = push_options.get(:merge_request)
     if mr_options.present?
-      message = process_mr_push_options(mr_options, project, user, params[:changes])
+      message = process_mr_push_options(mr_options, params[:changes])
       response.add_alert_message(message)
     end
 
@@ -46,8 +47,13 @@ class PostReceiveService
     response
   end
 
-  def process_mr_push_options(push_options, project, user, changes)
+  def process_mr_push_options(push_options, changes)
     Gitlab::QueryLimiting.whitelist('https://gitlab.com/gitlab-org/gitlab-foss/issues/61359')
+    return unless repository
+
+    unless repository.repo_type.project?
+      return push_options_warning('Push options are only supported for projects')
+    end
 
     service = ::MergeRequests::PushOptionsHandlerService.new(
       project, user, changes, push_options
@@ -64,6 +70,8 @@ class PostReceiveService
   end
 
   def merge_request_urls
+    return [] unless repository&.repo_type&.project?
+
     ::MergeRequests::GetUrlsService.new(project).execute(params[:changes])
   end
 end

app/workers/post_receive.rb

@@ -9,9 +9,9 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
   weight 5
 
   def perform(gl_repository, identifier, changes, push_options = {})
-    project, repo_type = Gitlab::GlRepository.parse(gl_repository)
+    container, project, repo_type = Gitlab::GlRepository.parse(gl_repository)
 
-    if project.nil?
+    if project.nil? && (!repo_type.snippet? || container.is_a?(ProjectSnippet))
       log("Triggered hook for non-existing project with gl_repository \"#{gl_repository}\"")
       return false
     end
@@ -20,12 +20,14 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
     # Use Sidekiq.logger so arguments can be correlated with execution
     # time and thread ID's.
     Sidekiq.logger.info "changes: #{changes.inspect}" if ENV['SIDEKIQ_LOG_ARGUMENTS']
-    post_received = Gitlab::GitPostReceive.new(project, identifier, changes, push_options)
+    post_received = Gitlab::GitPostReceive.new(container, identifier, changes, push_options)
 
     if repo_type.wiki?
-      process_wiki_changes(post_received)
+      process_wiki_changes(post_received, container)
     elsif repo_type.project?
-      process_project_changes(post_received)
+      process_project_changes(post_received, container)
+    elsif repo_type.snippet?
+      process_snippet_changes(post_received, container)
     else
       # Other repos don't have hooks for now
     end
@@ -39,24 +41,50 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
     end
   end
 
-  def process_project_changes(post_received)
+  def process_project_changes(post_received, project)
     user = identify_user(post_received)
 
     return false unless user
 
-    project = post_received.project
     push_options = post_received.push_options
     changes = post_received.changes
 
     # We only need to expire certain caches once per push
-    expire_caches(post_received, post_received.project.repository)
-    enqueue_repository_cache_update(post_received)
+    expire_caches(post_received, project.repository)
+    enqueue_project_cache_update(post_received, project)
 
     process_ref_changes(project, user, push_options: push_options, changes: changes)
-    update_remote_mirrors(post_received)
+    update_remote_mirrors(post_received, project)
     after_project_changes_hooks(project, user, changes.refs, changes.repository_data)
   end
 
+  def process_wiki_changes(post_received, project)
+    project.touch(:last_activity_at, :last_repository_updated_at)
+    project.wiki.repository.expire_statistics_caches
+    ProjectCacheWorker.perform_async(project.id, [], [:wiki_size])
+
+    user = identify_user(post_received)
+    return false unless user
+
+    # We only need to expire certain caches once per push
+    expire_caches(post_received, project.wiki.repository)
+
+    ::Git::WikiPushService.new(project, user, changes: post_received.changes).execute
+  end
+
+  def process_snippet_changes(post_received, snippet)
+    user = identify_user(post_received)
+
+    return false unless user
+
+    # At the moment, we only expires the repository caches.
+    # In the future we might need to call ProjectCacheWorker
+    # (or the custom class we create) to update the snippet
+    # repository size or any other key.
+    # We might also need to update the repository statistics.
+    expire_caches(post_received, snippet.repository)
+  end
+
   # Expire the repository status, branch, and tag cache once per push.
   def expire_caches(post_received, repository)
     repository.expire_status_cache if repository.empty?
@@ -65,12 +93,12 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
   end
 
   # Schedule an update for the repository size and commit count if necessary.
-  def enqueue_repository_cache_update(post_received)
+  def enqueue_project_cache_update(post_received, project)
     stats_to_invalidate = [:repository_size]
     stats_to_invalidate << :commit_count if post_received.includes_default_branch?
 
     ProjectCacheWorker.perform_async(
-      post_received.project.id,
+      project.id,
       [],
       stats_to_invalidate,
       true
@@ -83,10 +111,9 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
     Git::ProcessRefChangesService.new(project, user, params).execute
   end
 
-  def update_remote_mirrors(post_received)
+  def update_remote_mirrors(post_received, project)
     return unless post_received.includes_branches? || post_received.includes_tags?
 
-    project = post_received.project
     return unless project.has_remote_mirror?
 
     project.mark_stuck_remote_mirrors_as_failed!
@@ -99,20 +126,6 @@ class PostReceive # rubocop:disable Scalability/IdempotentWorker
     Gitlab::UsageDataCounters::SourceCodeCounter.count(:pushes)
   end
 
-  def process_wiki_changes(post_received)
-    post_received.project.touch(:last_activity_at, :last_repository_updated_at)
-    post_received.project.wiki.repository.expire_statistics_caches
-    ProjectCacheWorker.perform_async(post_received.project.id, [], [:wiki_size])
-
-    user = identify_user(post_received)
-    return false unless user
-
-    # We only need to expire certain caches once per push
-    expire_caches(post_received, post_received.project.wiki.repository)
-
-    ::Git::WikiPushService.new(post_received.project, user, changes: post_received.changes).execute
-  end
-
   def log(message)
     Gitlab::GitLogger.error("POST-RECEIVE: #{message}")
   end

changelogs/unreleased/fj-39176-create-project-snippet-repository.yml

+---
+title: Update git workflows and routes to allow snippets
+merge_request: 21739
+author:
+type: added

config/routes/git_http.rb

@@ -32,6 +32,14 @@ concern :lfsable do
   end
 end
 
+# Git route for personal and project snippets
+scope(path: ':namespace_id/:repository_id',
+      format: nil,
+      constraints: { namespace_id: Gitlab::PathRegex.personal_and_project_snippets_path_regex, repository_id: /\d+\.git/ },
+      module: :repositories) do
+  concerns :gitactionable
+end
+
 scope(path: '*namespace_id/:repository_id',
       format: nil,
       constraints: { namespace_id: Gitlab::PathRegex.full_namespace_route_regex }) do

ee/app/controllers/ee/repositories/git_http_controller.rb

@@ -79,7 +79,7 @@ module EE
       end
 
       def repository_full_path
-        File.join(params[:namespace_id], project_path)
+        File.join(params[:namespace_id], repository_path)
       end
 
       def decoded_authorization

ee/app/workers/ee/post_receive.rb

@@ -22,11 +22,11 @@ module EE
       end
     end
 
-    def process_wiki_changes(post_received)
+    def process_wiki_changes(post_received, project)
       super
 
       if ::Gitlab::Geo.primary?
-        ::Geo::RepositoryUpdatedService.new(post_received.project.wiki.repository).execute
+        ::Geo::RepositoryUpdatedService.new(project.wiki.repository).execute
       end
     end
 

ee/spec/lib/gitlab/git_access_spec.rb

@@ -674,7 +674,7 @@ describe Gitlab::GitAccess do
       protocol,
       authentication_abilities: authentication_abilities,
       namespace_path: namespace_path,
-      project_path: project_path,
+      repository_path: project_path,
       redirected_path: redirected_path
     )
   end

ee/spec/lib/gitlab/gl_repository/repo_type_spec.rb

@@ -3,6 +3,8 @@ require 'spec_helper'
 
 describe Gitlab::GlRepository::RepoType do
   let_it_be(:project) { create(:project) }
+  let_it_be(:personal_snippet) { create(:personal_snippet, author: project.owner) }
+  let_it_be(:project_snippet) { create(:project_snippet, project: project, author: project.owner) }
 
   describe Gitlab::GlRepository::DESIGN do
     it_behaves_like 'a repo type' do
@@ -24,6 +26,8 @@ describe Gitlab::GlRepository::RepoType do
       expect(described_class.valid?(project.design_repository.full_path)).to be_truthy
       expect(described_class.valid?(project.repository.full_path)).to be_falsey
       expect(described_class.valid?(project.wiki.repository.full_path)).to be_falsey
+      expect(described_class.valid?("snippets/#{personal_snippet.id}")).to be_falsey
+      expect(described_class.valid?("#{project.full_path}/snippets/#{project_snippet.id}")).to be_falsey
     end
   end
 end

ee/spec/lib/gitlab/gl_repository_spec.rb

@@ -6,7 +6,7 @@ describe Gitlab::GlRepository do
     let_it_be(:project) { create(:project, :repository) }
 
     it 'parses a design gl_repository' do
-      expect(described_class.parse("design-#{project.id}")).to eq([project, EE::Gitlab::GlRepository::DESIGN])
+      expect(described_class.parse("design-#{project.id}")).to eq([project, project, EE::Gitlab::GlRepository::DESIGN])
     end
   end
 

lib/api/helpers/internal_helpers.rb

@@ -3,7 +3,7 @@
 module API
   module Helpers
     module InternalHelpers
-      attr_reader :redirected_path
+      attr_reader :redirected_path, :container
 
       delegate :wiki?, to: :repo_type
 
@@ -22,10 +22,10 @@ module API
       end
 
       def access_checker_for(actor, protocol)
-        access_checker_klass.new(actor.key_or_user, project, protocol,
+        access_checker_klass.new(actor.key_or_user, container, protocol,
           authentication_abilities: ssh_authentication_abilities,
           namespace_path: namespace_path,
-          project_path: project_path,
+          repository_path: project_path,
           redirected_path: redirected_path)
       end
 
@@ -80,7 +80,7 @@ module API
 
       # rubocop:disable Gitlab/ModuleWithInstanceVariables
       def set_project
-        @project, @repo_type, @redirected_path =
+        @container, @project, @repo_type, @redirected_path =
           if params[:gl_repository]
             Gitlab::GlRepository.parse(params[:gl_repository])
           elsif params[:project]
@@ -92,17 +92,17 @@ module API
       # Project id to pass between components that don't share/don't have
       # access to the same filesystem mounts
       def gl_repository
-        repo_type.identifier_for_container(project)
+        repo_type.identifier_for_container(container)
       end
 
-      def gl_project_path
+      def gl_repository_path
         repository.full_path
       end
 
       # Return the repository depending on whether we want the wiki or the
       # regular repository
       def repository
-        @repository ||= repo_type.repository_for(project)
+        @repository ||= repo_type.repository_for(container)
       end
 
       # Return the Gitaly Address if it is enabled
@@ -111,8 +111,8 @@ module API
 
         {
           repository: repository.gitaly_repository,
-          address: Gitlab::GitalyClient.address(project.repository_storage),
-          token: Gitlab::GitalyClient.token(project.repository_storage),
+          address: Gitlab::GitalyClient.address(container.repository_storage),
+          token: Gitlab::GitalyClient.token(container.repository_storage),
           features: Feature::Gitaly.server_feature_flags
         }
       end

lib/api/internal/base.rb

@@ -67,7 +67,7 @@ module API
           when ::Gitlab::GitAccessResult::Success
             payload = {
               gl_repository: gl_repository,
-              gl_project_path: gl_project_path,
+              gl_project_path: gl_repository_path,
               gl_id: Gitlab::GlId.gl_id(actor.user),
               gl_username: actor.username,
               git_config_options: [],
@@ -216,7 +216,7 @@ module API
         post '/post_receive' do
           status 200
 
-          response = PostReceiveService.new(actor.user, project, params).execute
+          response = PostReceiveService.new(actor.user, repository, project, params).execute
 
           ee_post_receive_response_hook(response)
 

lib/gitlab/git_access.rb

@@ -43,15 +43,15 @@ module Gitlab
     PUSH_COMMANDS = %w{git-receive-pack}.freeze
     ALL_COMMANDS = DOWNLOAD_COMMANDS + PUSH_COMMANDS
 
-    attr_reader :actor, :project, :protocol, :authentication_abilities, :namespace_path, :project_path, :redirected_path, :auth_result_type, :changes, :logger
+    attr_reader :actor, :project, :protocol, :authentication_abilities, :namespace_path, :repository_path, :redirected_path, :auth_result_type, :changes, :logger
 
-    def initialize(actor, project, protocol, authentication_abilities:, namespace_path: nil, project_path: nil, redirected_path: nil, auth_result_type: nil)
+    def initialize(actor, project, protocol, authentication_abilities:, namespace_path: nil, repository_path: nil, redirected_path: nil, auth_result_type: nil)
       @actor    = actor
       @project  = project
       @protocol = protocol
-      @authentication_abilities = authentication_abilities
+      @authentication_abilities = Array(authentication_abilities)
       @namespace_path = namespace_path || project&.namespace&.full_path
-      @project_path = project_path || project&.path
+      @repository_path = repository_path || project&.path
       @redirected_path = redirected_path
       @auth_result_type = auth_result_type
     end
@@ -224,7 +224,7 @@ module Gitlab
       return unless user&.can?(:create_projects, namespace)
 
       project_params = {
-        path: project_path,
+        path: repository_path,
         namespace_id: namespace.id,
         visibility_level: Gitlab::VisibilityLevel::PRIVATE
       }

lib/gitlab/git_post_receive.rb

@@ -3,10 +3,10 @@
 module Gitlab
   class GitPostReceive
     include Gitlab::Identifier
-    attr_reader :project, :identifier, :changes, :push_options
+    attr_reader :container, :identifier, :changes, :push_options
 
-    def initialize(project, identifier, changes, push_options = {})
-      @project = project
+    def initialize(container, identifier, changes, push_options = {})
+      @container = container
       @identifier = identifier
       @changes = parse_changes(changes)
       @push_options = push_options
@@ -27,10 +27,10 @@ module Gitlab
     def includes_default_branch?
       # If the branch doesn't have a default branch yet, we presume the
       # first branch pushed will be the default.
-      return true unless project.default_branch.present?
+      return true unless container.default_branch.present?
 
       changes.branch_changes.any? do |change|
-        Gitlab::Git.branch_name(change[:ref]) == project.default_branch
+        Gitlab::Git.branch_name(change[:ref]) == container.default_branch
       end
     end
 

lib/gitlab/gl_repository.rb

@@ -7,19 +7,21 @@ module Gitlab
     PROJECT = RepoType.new(
       name: :project,
       access_checker_class: Gitlab::GitAccess,
-      repository_resolver: -> (project) { project.repository }
+      repository_resolver: -> (project) { project&.repository }
     ).freeze
     WIKI = RepoType.new(
       name: :wiki,
       access_checker_class: Gitlab::GitAccessWiki,
-      repository_resolver: -> (project) { project.wiki.repository },
+      repository_resolver: -> (project) { project&.wiki&.repository },
       suffix: :wiki
     ).freeze
     SNIPPET = RepoType.new(
       name: :snippet,
       access_checker_class: Gitlab::GitAccessSnippet,
-      repository_resolver: -> (snippet) { snippet.repository },
-      container_resolver: -> (id) { Snippet.find_by_id(id) }
+      repository_resolver: -> (snippet) { snippet&.repository },
+      container_resolver: -> (id) { Snippet.find_by_id(id) },
+      project_resolver: -> (snippet) { snippet&.project },
+      guest_read_ability: :read_snippet
     ).freeze
 
     TYPES = {
@@ -42,7 +44,7 @@ module Gitlab
 
       container = type.fetch_container!(gl_repository)
 
-      [container, type]
+      [container, type.project_for(container), type]
     end
 
     def self.default_type

lib/gitlab/gl_repository/repo_type.rb

@@ -7,6 +7,8 @@ module Gitlab
                   :access_checker_class,
                   :repository_resolver,
                   :container_resolver,
+                  :project_resolver,
+                  :guest_read_ability,
                   :suffix
 
       def initialize(
@@ -14,11 +16,15 @@ module Gitlab
         access_checker_class:,
         repository_resolver:,
         container_resolver: default_container_resolver,
+        project_resolver: nil,
+        guest_read_ability: :download_code,
         suffix: nil)
         @name = name
         @access_checker_class = access_checker_class
         @repository_resolver = repository_resolver
         @container_resolver = container_resolver
+        @project_resolver = project_resolver
+        @guest_read_ability = guest_read_ability
         @suffix = suffix
       end
 
@@ -59,8 +65,18 @@ module Gitlab
         repository_resolver.call(container)
       end
 
+      def project_for(container)
+        return container unless project_resolver
+
+        project_resolver.call(container)
+      end
+
       def valid?(repository_path)
-        repository_path.end_with?(path_suffix)
+        repository_path.end_with?(path_suffix) &&
+        (
+          !snippet? ||
+          repository_path.match?(Gitlab::PathRegex.full_snippets_repository_path_regex)
+        )
       end
 
       private

lib/gitlab/path_regex.rb

@@ -237,8 +237,32 @@ module Gitlab
       }x
     end
 
+    def full_snippets_repository_path_regex
+      %r{\A(#{personal_snippet_repository_path_regex}|#{project_snippet_repository_path_regex})\z}
+    end
+
+    def personal_and_project_snippets_path_regex
+      %r{#{personal_snippet_path_regex}|#{project_snippet_path_regex}}
+    end
+
     private
 
+    def personal_snippet_path_regex
+      /snippets/
+    end
+
+    def personal_snippet_repository_path_regex
+      %r{#{personal_snippet_path_regex}/\d+}
+    end
+
+    def project_snippet_path_regex
+      %r{#{full_namespace_route_regex}/#{project_route_regex}/snippets}
+    end
+
+    def project_snippet_repository_path_regex
+      %r{#{project_snippet_path_regex}/\d+}
+    end
+
     def single_line_regexp(regex)
       # Turns a multiline extended regexp into a single line one,
       # because `rake routes` breaks on multiline regexes.

lib/gitlab/repo_path.rb

@@ -19,22 +19,33 @@ module Gitlab
 
         # Removing the suffix (.wiki, .design, ...) from the project path
         full_path = repo_path.chomp(type.path_suffix)
-
-        project, was_redirected = find_project(full_path)
+        container, project, was_redirected = find_container(type, full_path)
         redirected_path = repo_path if was_redirected
 
-        # If we found a matching project, then the type was matched, no need to
-        # continue looking.
-        return [project, type, redirected_path] if project
+        return [container, project, type, redirected_path] if container
       end
 
       # When a project did not exist, the parsed repo_type would be empty.
       # In that case, we want to continue with a regular project repository. As we
       # could create the project if the user pushing is allowed to do so.
-      [nil, Gitlab::GlRepository.default_type, nil]
+      [nil, nil, Gitlab::GlRepository.default_type, nil]
+    end
+
+    def self.find_container(type, full_path)
+      if type.snippet?
+        snippet, was_redirected = find_snippet(full_path)
+
+        [snippet, snippet&.project, was_redirected]
+      else
+        project, was_redirected = find_project(full_path)
+
+        [project, project, was_redirected]
+      end
     end
 
     def self.find_project(project_path)
+      return [nil, false] if project_path.blank?
+
       project = Project.find_by_full_path(project_path, follow_redirects: true)
 
       [project, redirected?(project, project_path)]
@@ -43,6 +54,27 @@ module Gitlab
     def self.redirected?(project, project_path)
       project && project.full_path.casecmp(project_path) != 0
     end
+
+    # Snippet_path can be either:
+    # - snippets/1
+    # - h5bp/html5-boilerplate/snippets/53
+    def self.find_snippet(snippet_path)
+      return [nil, false] if snippet_path.blank?
+
+      snippet_id, project_path = extract_snippet_info(snippet_path)
+      project, was_redirected = find_project(project_path)
+
+      [Snippet.find_by_id_and_project(id: snippet_id, project: project), was_redirected]
+    end
+
+    def self.extract_snippet_info(snippet_path)
+      path_segments = snippet_path.split('/')
+      snippet_id = path_segments.pop
+      path_segments.pop # Remove snippets from path
+      project_path = File.join(path_segments)
+
+      [snippet_id, project_path]
+    end
   end
 end
 

lib/gitlab/workhorse.rb

@@ -24,7 +24,7 @@ module Gitlab
 
         attrs = {
           GL_ID: Gitlab::GlId.gl_id(user),
-          GL_REPOSITORY: repo_type.identifier_for_container(repository.project),
+          GL_REPOSITORY: repo_type.identifier_for_container(repository.container),
           GL_USERNAME: user&.username,
           ShowAllRefs: show_all_refs,
           Repository: repository.gitaly_repository.to_h,

spec/controllers/repositories/git_http_controller_spec.rb

@@ -6,16 +6,18 @@ describe Repositories::GitHttpController do
   include GitHttpHelpers
 
   let_it_be(:project) { create(:project, :public, :repository) }
+  let_it_be(:personal_snippet) { create(:personal_snippet, :public, :repository) }
+  let_it_be(:project_snippet) { create(:project_snippet, :public, :repository, project: project) }
 
   let(:namespace_id) { project.namespace.to_param }
   let(:repository_id) { project.path + '.git' }
-  let(:project_params) do
+  let(:container_params) do
     {
       namespace_id: namespace_id,
       repository_id: repository_id
     }
   end
-  let(:params) { project_params }
+  let(:params) { container_params }
 
   describe 'HEAD #info_refs' do
     it 'returns 403' do
@@ -27,7 +29,7 @@ describe Repositories::GitHttpController do
 
   shared_examples 'info_refs behavior' do
     describe 'GET #info_refs' do
-      let(:params) { project_params.merge(service: 'git-upload-pack') }
+      let(:params) { container_params.merge(service: 'git-upload-pack') }
 
       it 'returns 401 for unauthenticated requests to public repositories when http protocol is disabled' do
         stub_application_setting(enabled_git_access_protocol: 'ssh')
@@ -41,8 +43,6 @@ describe Repositories::GitHttpController do
       end
 
       context 'with authorized user' do
-        let(:user) { project.owner }
-
         before do
           request.headers.merge! auth_env(user.username, user.password, nil)
         end
@@ -122,7 +122,7 @@ describe Repositories::GitHttpController do
   end
 
   shared_examples 'access checker class' do
-    let(:params) { project_params.merge(service: 'git-upload-pack') }
+    let(:params) { container_params.merge(service: 'git-upload-pack') }
 
     it 'calls the right access class checker with the right object' do
       allow(controller).to receive(:verify_workhorse_api!).and_return(true)
@@ -136,11 +136,41 @@ describe Repositories::GitHttpController do
   end
 
   context 'when repository container is a project' do
-    it_behaves_like 'info_refs behavior'
+    it_behaves_like 'info_refs behavior' do
+      let(:user) { project.owner }
+    end
     it_behaves_like 'git_upload_pack behavior', true
     it_behaves_like 'access checker class' do
       let(:expected_class) { Gitlab::GitAccess }
       let(:expected_object) { project }
     end
   end
+
+  context 'when repository container is a personal snippet' do
+    let(:namespace_id) { 'snippets' }
+    let(:repository_id) { personal_snippet.to_param + '.git' }
+
+    it_behaves_like 'info_refs behavior' do
+      let(:user) { personal_snippet.author }
+    end
+    it_behaves_like 'git_upload_pack behavior', false
+    it_behaves_like 'access checker class' do
+      let(:expected_class) { Gitlab::GitAccessSnippet }
+      let(:expected_object) { personal_snippet }
+    end
+  end
+
+  context 'when repository container is a project snippet' do
+    let(:namespace_id) { project.full_path + '/snippets' }
+    let(:repository_id) { project_snippet.to_param + '.git' }
+
+    it_behaves_like 'info_refs behavior' do
+      let(:user) { project_snippet.author }
+    end
+    it_behaves_like 'git_upload_pack behavior', false
+    it_behaves_like 'access checker class' do
+      let(:expected_class) { Gitlab::GitAccessSnippet }
+      let(:expected_object) { project_snippet }
+    end
+  end
 end

spec/lib/gitlab/git_access_spec.rb

@@ -240,7 +240,7 @@ describe Gitlab::GitAccess do
         let(:access) do
           described_class.new(actor, nil,
             protocol, authentication_abilities: authentication_abilities,
-                      project_path: project_path, namespace_path: namespace_path,
+                      repository_path: project_path, namespace_path: namespace_path,
                       redirected_path: redirected_path)
         end
 
@@ -259,7 +259,7 @@ describe Gitlab::GitAccess do
         let(:access) do
           described_class.new(actor, nil,
             protocol, authentication_abilities: authentication_abilities,
-                      project_path: project_path, namespace_path: namespace_path,
+                      repository_path: project_path, namespace_path: namespace_path,
                       redirected_path: redirected_path)
         end
 
@@ -453,7 +453,7 @@ describe Gitlab::GitAccess do
     let(:access) do
       described_class.new(actor, project,
         protocol, authentication_abilities: authentication_abilities,
-                  project_path: project_path, namespace_path: namespace_path,
+                  repository_path: project_path, namespace_path: namespace_path,
                   redirected_path: redirected_path)
     end
 
@@ -598,7 +598,7 @@ describe Gitlab::GitAccess do
         let(:public_project) { create(:project, :public, :repository) }
         let(:project_path) { public_project.path }
         let(:namespace_path) { public_project.namespace.path }
-        let(:access) { described_class.new(nil, public_project, 'web', authentication_abilities: [:download_code], project_path: project_path, namespace_path: namespace_path) }
+        let(:access) { described_class.new(nil, public_project, 'web', authentication_abilities: [:download_code], repository_path: project_path, namespace_path: namespace_path) }
 
         context 'when repository is enabled' do
           it 'give access to download code' do
@@ -1203,7 +1203,7 @@ describe Gitlab::GitAccess do
   def access
     described_class.new(actor, project, protocol,
                         authentication_abilities: authentication_abilities,
-                        namespace_path: namespace_path, project_path: project_path,
+                        namespace_path: namespace_path, repository_path: project_path,
                         redirected_path: redirected_path, auth_result_type: auth_result_type)
   end
 

spec/lib/gitlab/gl_repository/repo_type_spec.rb

@@ -5,46 +5,62 @@ describe Gitlab::GlRepository::RepoType do
   let_it_be(:project) { create(:project) }
   let_it_be(:personal_snippet) { create(:personal_snippet, author: project.owner) }
   let_it_be(:project_snippet) { create(:project_snippet, project: project, author: project.owner) }
+  let(:project_path) { project.repository.full_path }
+  let(:wiki_path) { project.wiki.repository.full_path }
+  let(:personal_snippet_path) { "snippets/#{personal_snippet.id}" }
+  let(:project_snippet_path) { "#{project.full_path}/snippets/#{project_snippet.id}" }
 
   describe Gitlab::GlRepository::PROJECT do
     it_behaves_like 'a repo type' do
-      let(:expected_identifier) { "project-#{project.id}" }
       let(:expected_id) { project.id.to_s }
+      let(:expected_identifier) { "project-#{expected_id}" }
       let(:expected_suffix) { '' }
-      let(:expected_repository) { project.repository }
       let(:expected_container) { project }
+      let(:expected_repository) { expected_container.repository }
     end
 
     it 'knows its type' do
+      aggregate_failures do
         expect(described_class).not_to be_wiki
         expect(described_class).to be_project
         expect(described_class).not_to be_snippet
       end
+    end
 
     it 'checks if repository path is valid' do
-      expect(described_class.valid?(project.repository.full_path)).to be_truthy
-      expect(described_class.valid?(project.wiki.repository.full_path)).to be_truthy
+      aggregate_failures do
+        expect(described_class.valid?(project_path)).to be_truthy
+        expect(described_class.valid?(wiki_path)).to be_truthy
+        expect(described_class.valid?(personal_snippet_path)).to be_truthy
+        expect(described_class.valid?(project_snippet_path)).to be_truthy
+      end
     end
   end
 
   describe Gitlab::GlRepository::WIKI do
     it_behaves_like 'a repo type' do
-      let(:expected_identifier) { "wiki-#{project.id}" }
       let(:expected_id) { project.id.to_s }
+      let(:expected_identifier) { "wiki-#{expected_id}" }
       let(:expected_suffix) { '.wiki' }
-      let(:expected_repository) { project.wiki.repository }
       let(:expected_container) { project }
+      let(:expected_repository) { expected_container.wiki.repository }
     end
 
     it 'knows its type' do
+      aggregate_failures do
         expect(described_class).to be_wiki
         expect(described_class).not_to be_project
         expect(described_class).not_to be_snippet
       end
+    end
 
     it 'checks if repository path is valid' do
-      expect(described_class.valid?(project.repository.full_path)).to be_falsey
-      expect(described_class.valid?(project.wiki.repository.full_path)).to be_truthy
+      aggregate_failures do
+        expect(described_class.valid?(project_path)).to be_falsey
+        expect(described_class.valid?(wiki_path)).to be_truthy
+        expect(described_class.valid?(personal_snippet_path)).to be_falsey
+        expect(described_class.valid?(project_snippet_path)).to be_falsey
+      end
     end
   end
 
@@ -59,12 +75,23 @@ describe Gitlab::GlRepository::RepoType do
       end
 
       it 'knows its type' do
+        aggregate_failures do
           expect(described_class).to be_snippet
           expect(described_class).not_to be_wiki
           expect(described_class).not_to be_project
         end
       end
 
+      it 'checks if repository path is valid' do
+        aggregate_failures do
+          expect(described_class.valid?(project_path)).to be_falsey
+          expect(described_class.valid?(wiki_path)).to be_falsey
+          expect(described_class.valid?(personal_snippet_path)).to be_truthy
+          expect(described_class.valid?(project_snippet_path)).to be_truthy
+        end
+      end
+    end
+
     context 'when ProjectSnippet' do
       it_behaves_like 'a repo type' do
         let(:expected_id) { project_snippet.id.to_s }
@@ -75,10 +102,21 @@ describe Gitlab::GlRepository::RepoType do
       end
 
       it 'knows its type' do
+        aggregate_failures do
           expect(described_class).to be_snippet
           expect(described_class).not_to be_wiki
           expect(described_class).not_to be_project
         end
       end
+
+      it 'checks if repository path is valid' do
+        aggregate_failures do
+          expect(described_class.valid?(project_path)).to be_falsey
+          expect(described_class.valid?(wiki_path)).to be_falsey
+          expect(described_class.valid?(personal_snippet_path)).to be_truthy
+          expect(described_class.valid?(project_snippet_path)).to be_truthy
+        end
+      end
+    end
   end
 end

spec/lib/gitlab/gl_repository_spec.rb

@@ -5,13 +5,18 @@ require 'spec_helper'
 describe ::Gitlab::GlRepository do
   describe '.parse' do
     let_it_be(:project) { create(:project, :repository) }
+    let_it_be(:snippet) { create(:personal_snippet) }
 
     it 'parses a project gl_repository' do
-      expect(described_class.parse("project-#{project.id}")).to eq([project, Gitlab::GlRepository::PROJECT])
+      expect(described_class.parse("project-#{project.id}")).to eq([project, project, Gitlab::GlRepository::PROJECT])
     end
 
     it 'parses a wiki gl_repository' do
-      expect(described_class.parse("wiki-#{project.id}")).to eq([project, Gitlab::GlRepository::WIKI])
+      expect(described_class.parse("wiki-#{project.id}")).to eq([project, project, Gitlab::GlRepository::WIKI])
+    end
+
+    it 'parses a snippet gl_repository' do
+      expect(described_class.parse("snippet-#{snippet.id}")).to eq([snippet, nil, Gitlab::GlRepository::SNIPPET])
     end
 
     it 'throws an argument error on an invalid gl_repository type' do

spec/lib/gitlab/path_regex_spec.rb

@@ -411,4 +411,37 @@ describe Gitlab::PathRegex do
     it { is_expected.not_to match('git lab') }
     it { is_expected.not_to match('gitlab.git') }
   end
+
+  shared_examples 'invalid snippet routes' do
+    it { is_expected.not_to match('gitlab-org/gitlab/snippets/1.git') }
+    it { is_expected.not_to match('snippets/1.git') }
+    it { is_expected.not_to match('gitlab-org/gitlab/snippets/') }
+    it { is_expected.not_to match('/gitlab-org/gitlab/snippets/1') }
+    it { is_expected.not_to match('gitlab-org/gitlab/snippets/foo') }
+    it { is_expected.not_to match('root/snippets/1') }
+    it { is_expected.not_to match('/snippets/1') }
+    it { is_expected.not_to match('snippets/') }
+    it { is_expected.not_to match('snippets/foo') }
+  end
+
+  describe '.full_snippets_repository_path_regex' do
+    subject { described_class.full_snippets_repository_path_regex }
+
+    it { is_expected.to match('gitlab-org/gitlab/snippets/1') }
+    it { is_expected.to match('snippets/1') }
+
+    it_behaves_like 'invalid snippet routes'
+  end
+
+  describe '.personal_and_project_snippets_path_regex' do
+    subject { %r{\A#{described_class.personal_and_project_snippets_path_regex}\z} }
+
+    it { is_expected.to match('gitlab-org/gitlab/snippets') }
+    it { is_expected.to match('snippets') }
+
+    it { is_expected.not_to match('gitlab-org/gitlab/snippets/1') }
+    it { is_expected.not_to match('snippets/1') }
+
+    it_behaves_like 'invalid snippet routes'
+  end
 end

spec/lib/gitlab/repo_path_spec.rb

@@ -3,60 +3,72 @@
 require 'spec_helper'
 
 describe ::Gitlab::RepoPath do
-  describe '.parse' do
+  include Gitlab::Routing
+
   let_it_be(:project) { create(:project, :repository) }
+  let_it_be(:personal_snippet) { create(:personal_snippet) }
+  let_it_be(:project_snippet) { create(:project_snippet, project: project) }
+  let_it_be(:redirect) { project.route.create_redirect('foo/bar/baz') }
 
+  describe '.parse' do
     context 'a repository storage path' do
-      it 'parses a full repository path' do
-        expect(described_class.parse(project.repository.full_path)).to eq([project, Gitlab::GlRepository::PROJECT, nil])
+      it 'parses a full repository project path' do
+        expect(described_class.parse(project.repository.full_path)).to eq([project, project, Gitlab::GlRepository::PROJECT, nil])
+      end
+
+      it 'parses a full wiki project path' do
+        expect(described_class.parse(project.wiki.repository.full_path)).to eq([project, project, Gitlab::GlRepository::WIKI, nil])
+      end
+
+      it 'parses a personal snippet repository path' do
+        expect(described_class.parse("snippets/#{personal_snippet.id}")).to eq([personal_snippet, nil, Gitlab::GlRepository::SNIPPET, nil])
       end
 
-      it 'parses a full wiki path' do
-        expect(described_class.parse(project.wiki.repository.full_path)).to eq([project, Gitlab::GlRepository::WIKI, nil])
+      it 'parses a project snippet repository path' do
+        expect(described_class.parse("#{project.full_path}/snippets/#{project_snippet.id}")).to eq([project_snippet, project, Gitlab::GlRepository::SNIPPET, nil])
       end
     end
 
     context 'a relative path' do
       it 'parses a relative repository path' do
-        expect(described_class.parse(project.full_path + '.git')).to eq([project, Gitlab::GlRepository::PROJECT, nil])
+        expect(described_class.parse(project.full_path + '.git')).to eq([project, project, Gitlab::GlRepository::PROJECT, nil])
       end
 
       it 'parses a relative wiki path' do
-        expect(described_class.parse(project.full_path + '.wiki.git')).to eq([project, Gitlab::GlRepository::WIKI, nil])
+        expect(described_class.parse(project.full_path + '.wiki.git')).to eq([project, project, Gitlab::GlRepository::WIKI, nil])
       end
 
       it 'parses a relative path starting with /' do
-        expect(described_class.parse('/' + project.full_path + '.git')).to eq([project, Gitlab::GlRepository::PROJECT, nil])
+        expect(described_class.parse('/' + project.full_path + '.git')).to eq([project, project, Gitlab::GlRepository::PROJECT, nil])
       end
 
       context 'of a redirected project' do
         let(:redirect) { project.route.create_redirect('foo/bar') }
 
         it 'parses a relative repository path' do
-          expect(described_class.parse(redirect.path + '.git')).to eq([project, Gitlab::GlRepository::PROJECT, 'foo/bar'])
+          expect(described_class.parse(redirect.path + '.git')).to eq([project, project, Gitlab::GlRepository::PROJECT, 'foo/bar'])
         end
 
         it 'parses a relative wiki path' do
-          expect(described_class.parse(redirect.path + '.wiki.git')).to eq([project, Gitlab::GlRepository::WIKI, 'foo/bar.wiki'])
+          expect(described_class.parse(redirect.path + '.wiki.git')).to eq([project, project, Gitlab::GlRepository::WIKI, 'foo/bar.wiki'])
         end
 
         it 'parses a relative path starting with /' do
-          expect(described_class.parse('/' + redirect.path + '.git')).to eq([project, Gitlab::GlRepository::PROJECT, 'foo/bar'])
+          expect(described_class.parse('/' + redirect.path + '.git')).to eq([project, project, Gitlab::GlRepository::PROJECT, 'foo/bar'])
+        end
+
+        it 'parses a redirected project snippet repository path' do
+          expect(described_class.parse(redirect.path + "/snippets/#{project_snippet.id}.git")).to eq([project_snippet, project, Gitlab::GlRepository::SNIPPET, "foo/bar/snippets/#{project_snippet.id}"])
         end
       end
     end
 
-    it "returns the default type for non existent paths" do
-      _project, type, _redirected = described_class.parse("path/non-existent.git")
-
-      expect(type).to eq(Gitlab::GlRepository.default_type)
+    it 'returns the default type for non existent paths' do
+      expect(described_class.parse('path/non-existent.git')).to eq([nil, nil, Gitlab::GlRepository.default_type, nil])
     end
   end
 
   describe '.find_project' do
-    let(:project) { create(:project) }
-    let(:redirect) { project.route.create_redirect('foo/bar/baz') }
-
     context 'when finding a project by its canonical path' do
       context 'when the cases match' do
         it 'returns the project and false' do
@@ -81,4 +93,34 @@ describe ::Gitlab::RepoPath do
       end
     end
   end
+
+  describe '.find_snippet' do
+    it 'extracts path and id from personal snippet route' do
+      expect(described_class.find_snippet("snippets/#{personal_snippet.id}")).to eq([personal_snippet, false])
+    end
+
+    it 'extracts path and id from project snippet route' do
+      expect(described_class.find_snippet("#{project.full_path}/snippets/#{project_snippet.id}")).to eq([project_snippet, false])
+    end
+
+    it 'returns nil for invalid snippet paths' do
+      aggregate_failures do
+        expect(described_class.find_snippet("snippets/#{project_snippet.id}")).to eq([nil, false])
+        expect(described_class.find_snippet("#{project.full_path}/snippets/#{personal_snippet.id}")).to eq([nil, false])
+        expect(described_class.find_snippet('')).to eq([nil, false])
+      end
+    end
+
+    it 'returns nil for snippets not associated with the project' do
+      snippet = create(:project_snippet)
+
+      expect(described_class.find_snippet("#{project.full_path}/snippets/#{snippet.id}")).to eq([nil, false])
+    end
+
+    context 'when finding a project snippet via a redirect' do
+      it 'returns the project and true' do
+        expect(described_class.find_snippet("#{redirect.path}/snippets/#{project_snippet.id}")).to eq([project_snippet, true])
+      end
+    end
+  end
 end

spec/lib/gitlab/repository_cache_spec.rb

@@ -12,6 +12,7 @@ describe Gitlab::RepositoryCache do
   describe '#cache_key' do
     subject { cache.cache_key(:foo) }
 
+    shared_examples 'cache_key examples' do
       it 'includes the namespace' do
         expect(subject).to eq "foo:#{namespace}"
       end
@@ -29,6 +30,30 @@ describe Gitlab::RepositoryCache do
       end
     end
 
+    describe 'project repository' do
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { project.repository }
+      end
+    end
+
+    describe 'personal snippet repository' do
+      let_it_be(:personal_snippet) { create(:personal_snippet) }
+      let(:namespace) { repository.full_path }
+
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { personal_snippet.repository }
+      end
+    end
+
+    describe 'project snippet repository' do
+      let_it_be(:project_snippet) { create(:project_snippet, project: project) }
+
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { project_snippet.repository }
+      end
+    end
+  end
+
   describe '#expire' do
     it 'expires the given key from the cache' do
       cache.expire(:foo)

spec/lib/gitlab/repository_set_cache_spec.rb

@@ -11,6 +11,7 @@ describe Gitlab::RepositorySetCache, :clean_gitlab_redis_cache do
   describe '#cache_key' do
     subject { cache.cache_key(:foo) }
 
+    shared_examples 'cache_key examples' do
       it 'includes the namespace' do
         is_expected.to eq("foo:#{namespace}:set")
       end
@@ -25,6 +26,30 @@ describe Gitlab::RepositorySetCache, :clean_gitlab_redis_cache do
       end
     end
 
+    describe 'project repository' do
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { project.repository }
+      end
+    end
+
+    describe 'personal snippet repository' do
+      let_it_be(:personal_snippet) { create(:personal_snippet) }
+      let(:namespace) { repository.full_path }
+
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { personal_snippet.repository }
+      end
+    end
+
+    describe 'project snippet repository' do
+      let_it_be(:project_snippet) { create(:project_snippet, project: project) }
+
+      it_behaves_like 'cache_key examples' do
+        let(:repository) { project_snippet.repository }
+      end
+    end
+  end
+
   describe '#expire' do
     it 'expires the given key from the cache' do
       cache.write(:foo, ['value'])

spec/requests/api/internal/base_spec.rb

@@ -10,6 +10,9 @@ describe API::Internal::Base do
   let(:gl_repository) { "project-#{project.id}" }
   let(:reference_counter) { double('ReferenceCounter') }
 
+  let_it_be(:personal_snippet) { create(:personal_snippet, :repository, author: user) }
+  let_it_be(:project_snippet) { create(:project_snippet, :repository, author: user, project: project) }
+
   describe "GET /internal/check" do
     it do
       expect_any_instance_of(Redis).to receive(:ping).and_return('PONG')
@@ -312,6 +315,54 @@ describe API::Internal::Base do
         end
       end
 
+      context 'git push with personal snippet' do
+        it 'responds with success' do
+          push(key, personal_snippet)
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response["status"]).to be_truthy
+          expect(json_response["gl_project_path"]).to eq(personal_snippet.repository.full_path)
+          expect(json_response["gl_repository"]).to eq("snippet-#{personal_snippet.id}")
+          expect(user.reload.last_activity_on).to be_nil
+        end
+      end
+
+      context 'git pull with personal snippet' do
+        it 'responds with success' do
+          pull(key, personal_snippet)
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response["status"]).to be_truthy
+          expect(json_response["gl_project_path"]).to eq(personal_snippet.repository.full_path)
+          expect(json_response["gl_repository"]).to eq("snippet-#{personal_snippet.id}")
+          expect(user.reload.last_activity_on).to eql(Date.today)
+        end
+      end
+
+      context 'git push with project snippet' do
+        it 'responds with success' do
+          push(key, project_snippet)
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response["status"]).to be_truthy
+          expect(json_response["gl_project_path"]).to eq(project_snippet.repository.full_path)
+          expect(json_response["gl_repository"]).to eq("snippet-#{project_snippet.id}")
+          expect(user.reload.last_activity_on).to be_nil
+        end
+      end
+
+      context 'git pull with project snippet' do
+        it 'responds with success' do
+          pull(key, project_snippet)
+
+          expect(response).to have_gitlab_http_status(:ok)
+          expect(json_response["status"]).to be_truthy
+          expect(json_response["gl_project_path"]).to eq(project_snippet.repository.full_path)
+          expect(json_response["gl_repository"]).to eq("snippet-#{project_snippet.id}")
+          expect(user.reload.last_activity_on).to eql(Date.today)
+        end
+      end
+
       context "git pull" do
         before do
           allow(Feature).to receive(:persisted_names).and_return(%w[gitaly_mep_mep])
@@ -393,6 +444,7 @@ describe API::Internal::Base do
         end
       end
 
+      context 'with Project' do
         it_behaves_like 'storing arguments in the application context' do
           let(:expected_params) { { user: key.user.username, project: project.full_path } }
 
@@ -400,6 +452,23 @@ describe API::Internal::Base do
         end
       end
 
+      context 'with PersonalSnippet' do
+        it_behaves_like 'storing arguments in the application context' do
+          let(:expected_params) { { user: key.user.username } }
+
+          subject { push(key, personal_snippet) }
+        end
+      end
+
+      context 'with ProjectSnippet' do
+        it_behaves_like 'storing arguments in the application context' do
+          let(:expected_params) { { user: key.user.username, project: project_snippet.project.full_path } }
+
+          subject { push(key, project_snippet) }
+        end
+      end
+    end
+
     context "access denied" do
       before do
         project.add_guest(user)
@@ -450,7 +519,7 @@ describe API::Internal::Base do
           {
             authentication_abilities: [:read_project, :download_code, :push_code],
             namespace_path: project.namespace.path,
-            project_path: project.path,
+            repository_path: project.path,
             redirected_path: nil
           }
         ).and_return(access_checker)
@@ -835,6 +904,7 @@ describe API::Internal::Base do
       allow_any_instance_of(Gitlab::Identifier).to receive(:identify).and_return(user)
     end
 
+    context 'with Project' do
       it 'executes PostReceiveService' do
         message = <<~MESSAGE.strip
           To create a merge request for #{branch_name}, visit:
@@ -852,6 +922,43 @@ describe API::Internal::Base do
       it_behaves_like 'storing arguments in the application context' do
         let(:expected_params) { { user: user.username, project: project.full_path } }
       end
+    end
+
+    context 'with PersonalSnippet' do
+      let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+
+      it 'executes PostReceiveService' do
+        subject
+
+        expect(json_response).to eq({
+          'messages' => [],
+          'reference_counter_decreased' => true
+        })
+      end
+
+      it_behaves_like 'storing arguments in the application context' do
+        let(:expected_params) { { user: key.user.username } }
+        let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:gl_repository) { "snippet-#{project_snippet.id}" }
+
+      it 'executes PostReceiveService' do
+        subject
+
+        expect(json_response).to eq({
+          'messages' => [],
+          'reference_counter_decreased' => true
+        })
+      end
+
+      it_behaves_like 'storing arguments in the application context' do
+        let(:expected_params) { { user: key.user.username, project: project_snippet.project.full_path } }
+        let(:gl_repository) { "snippet-#{project_snippet.id}" }
+      end
+    end
 
     context 'with an orphaned write deploy key' do
       it 'does not try to notify that project moved' do
@@ -866,10 +973,25 @@ describe API::Internal::Base do
     end
 
     context 'when project is nil' do
+      context 'with Project' do
         let(:gl_repository) { 'project-foo' }
 
         it 'does not try to notify that project moved' do
-        allow(Gitlab::GlRepository).to receive(:parse).and_return([nil, Gitlab::GlRepository::PROJECT])
+          allow(Gitlab::GlRepository).to receive(:parse).and_return([nil, nil, Gitlab::GlRepository::PROJECT])
+
+          expect(Gitlab::Checks::ProjectMoved).not_to receive(:fetch_message)
+
+          subject
+
+          expect(response).to have_gitlab_http_status(:ok)
+        end
+      end
+
+      context 'with PersonalSnippet' do
+        let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+
+        it 'does not try to notify that project moved' do
+          allow(Gitlab::GlRepository).to receive(:parse).and_return([personal_snippet, nil, Gitlab::GlRepository::PROJECT])
 
           expect(Gitlab::Checks::ProjectMoved).not_to receive(:fetch_message)
 
@@ -879,6 +1001,7 @@ describe API::Internal::Base do
         end
       end
     end
+  end
 
   describe 'POST /internal/pre_receive' do
     let(:valid_params) do
@@ -896,24 +1019,37 @@ describe API::Internal::Base do
     end
   end
 
-  def gl_repository_for(project_or_wiki)
-    case project_or_wiki
+  def gl_repository_for(container)
+    case container
     when ProjectWiki
-      Gitlab::GlRepository::WIKI.identifier_for_container(project_or_wiki.project)
+      Gitlab::GlRepository::WIKI.identifier_for_container(container.project)
     when Project
-      Gitlab::GlRepository::PROJECT.identifier_for_container(project_or_wiki)
+      Gitlab::GlRepository::PROJECT.identifier_for_container(container)
+    when Snippet
+      Gitlab::GlRepository::SNIPPET.identifier_for_container(container)
     else
       nil
     end
   end
 
-  def pull(key, project, protocol = 'ssh')
+  def full_path_for(container)
+    case container
+    when PersonalSnippet
+      "snippets/#{container.id}"
+    when ProjectSnippet
+      "#{container.project.full_path}/snippets/#{container.id}"
+    else
+      container.full_path
+    end
+  end
+
+  def pull(key, container, protocol = 'ssh')
     post(
       api("/internal/allowed"),
       params: {
         key_id: key.id,
-        project: project.full_path,
-        gl_repository: gl_repository_for(project),
+        project: full_path_for(container),
+        gl_repository: gl_repository_for(container),
         action: 'git-upload-pack',
         secret_token: secret_token,
         protocol: protocol
@@ -921,12 +1057,12 @@ describe API::Internal::Base do
     )
   end
 
-  def push(key, project, protocol = 'ssh', env: nil)
+  def push(key, container, protocol = 'ssh', env: nil)
     params = {
       changes: 'd14d6c0abdd253381df51a723d58691b2ee1ab08 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/master',
       key_id: key.id,
-      project: project.full_path,
-      gl_repository: gl_repository_for(project),
+      project: full_path_for(container),
+      gl_repository: gl_repository_for(container),
       action: 'git-receive-pack',
       secret_token: secret_token,
       protocol: protocol,
@@ -939,14 +1075,14 @@ describe API::Internal::Base do
     )
   end
 
-  def archive(key, project)
+  def archive(key, container)
     post(
       api("/internal/allowed"),
       params: {
         ref: 'master',
         key_id: key.id,
-        project: project.full_path,
-        gl_repository: gl_repository_for(project),
+        project: full_path_for(container),
+        gl_repository: gl_repository_for(container),
         action: 'git-upload-archive',
         secret_token: secret_token,
         protocol: 'ssh'

spec/services/post_receive_service_spec.rb

@@ -5,8 +5,10 @@ require 'spec_helper'
 describe PostReceiveService do
   include Gitlab::Routing
 
-  let_it_be(:project) { create(:project, :repository, :wiki_repo) }
   let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project, :repository, :wiki_repo, namespace: user.namespace) }
+  let_it_be(:project_snippet) { create(:project_snippet, :repository, project: project, author: user) }
+  let_it_be(:personal_snippet) { create(:personal_snippet, :repository, author: user) }
 
   let(:identifier) { 'key-123' }
   let(:gl_repository) { "project-#{project.id}" }
@@ -14,6 +16,7 @@ describe PostReceiveService do
   let(:secret_token) { Gitlab::Shell.secret_token }
   let(:reference_counter) { double('ReferenceCounter') }
   let(:push_options) { ['ci.skip', 'another push option'] }
+  let(:repository) { project.repository }
 
   let(:changes) do
     "#{Gitlab::Git::BLANK_SHA} 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/#{branch_name}"
@@ -29,10 +32,40 @@ describe PostReceiveService do
     }
   end
 
-  let(:response) { PostReceiveService.new(user, project, params).execute }
+  let(:service) { described_class.new(user, repository, project, params) }
+  let(:response) { service.execute }
 
   subject { response.messages.as_json }
 
+  context 'when project is nil' do
+    let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+    let(:project) { nil }
+    let(:repository) { personal_snippet.repository }
+
+    it 'does not return error' do
+      expect(subject).to be_empty
+    end
+  end
+
+  context 'when repository is nil' do
+    let(:repository) { nil }
+
+    it 'does not return error' do
+      expect(subject).to be_empty
+    end
+  end
+
+  context 'when both repository and project are nil' do
+    let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+    let(:project) { nil }
+    let(:repository) { nil }
+
+    it 'does not return error' do
+      expect(subject).to be_empty
+    end
+  end
+
+  shared_examples 'post_receive_service actions' do
     it 'enqueues a PostReceive worker job' do
       expect(PostReceive).to receive(:perform_async)
         .with(gl_repository, identifier, changes, { ci: { skip: true } })
@@ -47,6 +80,10 @@ describe PostReceiveService do
 
       expect(response.reference_counter_decreased).to be(true)
     end
+  end
+
+  context 'with Project' do
+    it_behaves_like 'post_receive_service actions'
 
     it 'returns link to create new merge request' do
       message = <<~MESSAGE.strip
@@ -129,6 +166,41 @@ describe PostReceiveService do
         expect(subject).to include(build_alert_message(message))
       end
     end
+  end
+
+  context 'with PersonalSnippet' do
+    let(:gl_repository) { "snippet-#{personal_snippet.id}" }
+    let(:repository) { personal_snippet.repository }
+
+    it_behaves_like 'post_receive_service actions'
+
+    it 'does not return link to create new merge request' do
+      expect(subject).to be_empty
+    end
+
+    it 'does not return the link to an existing merge request when it exists' do
+      create(:merge_request, source_project: project, source_branch: branch_name, target_branch: 'master')
+
+      expect(subject).to be_empty
+    end
+  end
+
+  context 'with ProjectSnippet' do
+    let(:gl_repository) { "snippet-#{project_snippet.id}" }
+    let(:repository) { project_snippet.repository }
+
+    it_behaves_like 'post_receive_service actions'
+
+    it 'does not return link to create new merge request' do
+      expect(subject).to be_empty
+    end
+
+    it 'does not return the link to an existing merge request when it exists' do
+      create(:merge_request, source_project: project, source_branch: branch_name, target_branch: 'master')
+
+      expect(subject).to be_empty
+    end
+  end
 
   context 'broadcast message banner exists' do
     it 'outputs a broadcast message' do
@@ -178,6 +250,50 @@ describe PostReceiveService do
     end
   end
 
+  describe '#process_mr_push_options' do
+    context 'when repository belongs to a snippet' do
+      context 'with PersonalSnippet' do
+        let(:repository) { personal_snippet.repository }
+
+        it 'returns an error message' do
+          result = service.process_mr_push_options(push_options, changes)
+
+          expect(result).to match('Push options are only supported for projects')
+        end
+      end
+
+      context 'with ProjectSnippet' do
+        let(:repository) { project_snippet.repository }
+
+        it 'returns an error message' do
+          result = service.process_mr_push_options(push_options, changes)
+
+          expect(result).to match('Push options are only supported for projects')
+        end
+      end
+    end
+  end
+
+  describe '#merge_request_urls' do
+    context 'when repository belongs to a snippet' do
+      context 'with PersonalSnippet' do
+        let(:repository) { personal_snippet.repository }
+
+        it 'returns an empty array' do
+          expect(service.merge_request_urls).to be_empty
+        end
+      end
+
+      context 'with ProjectSnippet' do
+        let(:repository) { project_snippet.repository }
+
+        it 'returns an empty array' do
+          expect(service.merge_request_urls).to be_empty
+        end
+      end
+    end
+  end
+
   def build_alert_message(message)
     { 'type' => 'alert', 'message' => message }
   end

spec/workers/post_receive_spec.rb

@@ -34,6 +34,31 @@ describe PostReceive do
       expect(Gitlab::GitLogger).to receive(:error).with("POST-RECEIVE: #{error_message}")
       expect(perform).to be(false)
     end
+
+    context 'with PersonalSnippet' do
+      let(:gl_repository) { "snippet-#{snippet.id}" }
+      let(:snippet) { create(:personal_snippet, author: project.owner) }
+
+      it 'does not log an error' do
+        expect(Gitlab::GitLogger).not_to receive(:error)
+        expect(Gitlab::GitPostReceive).to receive(:new).and_call_original
+        expect_any_instance_of(described_class) do |instance|
+          expect(instance).to receive(:process_snippet_changes)
+        end
+
+        perform
+      end
+    end
+
+    context 'with ProjectSnippet' do
+      let(:gl_repository) { "snippet-#{snippet.id}" }
+      let(:snippet) { create(:snippet, type: 'ProjectSnippet', project: nil, author: project.owner) }
+
+      it 'returns false and logs an error' do
+        expect(Gitlab::GitLogger).to receive(:error).with("POST-RECEIVE: #{error_message}")
+        expect(perform).to be(false)
+      end
+    end
   end
 
   describe "#process_project_changes" do
@@ -44,7 +69,7 @@ describe PostReceive do
       before do
         allow_any_instance_of(Gitlab::GitPostReceive).to receive(:identify).and_return(empty_project.owner)
         # Need to mock here so we can expect calls on project
-        allow(Gitlab::GlRepository).to receive(:parse).and_return([empty_project, Gitlab::GlRepository::PROJECT])
+        allow(Gitlab::GlRepository).to receive(:parse).and_return([empty_project, empty_project, Gitlab::GlRepository::PROJECT])
       end
 
       it 'expire the status cache' do
@@ -97,7 +122,7 @@ describe PostReceive do
 
       before do
         allow_any_instance_of(Gitlab::GitPostReceive).to receive(:identify).and_return(project.owner)
-        allow(Gitlab::GlRepository).to receive(:parse).and_return([project, Gitlab::GlRepository::PROJECT])
+        allow(Gitlab::GlRepository).to receive(:parse).and_return([project, project, Gitlab::GlRepository::PROJECT])
       end
 
       shared_examples 'updating remote mirrors' do
@@ -176,7 +201,7 @@ describe PostReceive do
         end
 
         before do
-          expect(Gitlab::GlRepository).to receive(:parse).and_return([project, Gitlab::GlRepository::PROJECT])
+          expect(Gitlab::GlRepository).to receive(:parse).and_return([project, project, Gitlab::GlRepository::PROJECT])
         end
 
         it 'does not expire branches cache' do
@@ -256,7 +281,7 @@ describe PostReceive do
 
     before do
       # Need to mock here so we can expect calls on project
-      allow(Gitlab::GlRepository).to receive(:parse).and_return([project, Gitlab::GlRepository::WIKI])
+      allow(Gitlab::GlRepository).to receive(:parse).and_return([project, project, Gitlab::GlRepository::WIKI])
     end
 
     it 'updates project activity' do
@@ -333,4 +358,82 @@ describe PostReceive do
       perform
     end
   end
+
+  describe '#process_snippet_changes' do
+    let(:gl_repository) { "snippet-#{snippet.id}" }
+
+    before do
+      # Need to mock here so we can expect calls on project
+      allow(Gitlab::GlRepository).to receive(:parse).and_return([snippet, snippet.project, Gitlab::GlRepository::SNIPPET])
+    end
+
+    shared_examples 'snippet changes actions' do
+      context 'unidentified user' do
+        let!(:key_id) { '' }
+
+        it 'returns false' do
+          expect(perform).to be false
+        end
+      end
+
+      context 'with changes' do
+        context 'branches' do
+          let(:changes) do
+            <<~EOF
+                123456 789012 refs/heads/tést1
+                123456 789012 refs/heads/tést2
+            EOF
+          end
+
+          it 'expires the branches cache' do
+            expect(snippet.repository).to receive(:expire_branches_cache).once
+
+            perform
+          end
+
+          it 'expires the status cache' do
+            expect(snippet.repository).to receive(:empty?).and_return(true)
+            expect(snippet.repository).to receive(:expire_status_cache)
+
+            perform
+          end
+        end
+
+        context 'tags' do
+          let(:changes) do
+            <<~EOF
+              654321 210987 refs/tags/tag1
+              654322 210986 refs/tags/tag2
+              654323 210985 refs/tags/tag3
+            EOF
+          end
+
+          it 'does not expire branches cache' do
+            expect(snippet.repository).not_to receive(:expire_branches_cache)
+
+            perform
+          end
+
+          it 'only invalidates tags once' do
+            expect(snippet.repository).to receive(:expire_caches_for_tags).once.and_call_original
+            expect(snippet.repository).to receive(:expire_tags_cache).once.and_call_original
+
+            perform
+          end
+        end
+      end
+    end
+
+    context 'with PersonalSnippet' do
+      let!(:snippet) { create(:personal_snippet, author: project.owner) }
+
+      it_behaves_like 'snippet changes actions'
+    end
+
+    context 'with ProjectSnippet' do
+      let!(:snippet) { create(:project_snippet, project: project, author: project.owner) }
+
+      it_behaves_like 'snippet changes actions'
+    end
+  end
 end