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 Hacking on swh-indexer
 ======================
 
 This tutorial will guide you through the hacking on the swh-indexer.
 If you do not have a local copy of the Software Heritage archive, go to the
 :ref:`getting started tutorial <getting-started>`.
 
 Configuration files
 -------------------
 You will need the following YAML configuration files to run the swh-indexer
 commands:
 
 - Orchestrator at
   ``~/.config/swh/indexer/orchestrator.yml``
 
 .. code-block:: yaml
 
   indexers:
     mimetype:
       check_presence: false
       batch_size: 100
 
 - Orchestrator-text at
   ``~/.config/swh/indexer/orchestrator-text.yml``
 
 .. code-block:: yaml
 
   indexers:
-    # language:
-    #   batch_size: 10
-    #   check_presence: false
     fossology_license:
       batch_size: 10
       check_presence: false
-    # ctags:
-    #   batch_size: 2
-    #   check_presence: false
 
 - Mimetype indexer at
   ``~/.config/swh/indexer/mimetype.yml``
 
 .. code-block:: yaml
 
     # storage to read sha1's metadata (path)
   	# storage:
   	#   cls: local
   	#   db: "service=swh-dev"
   	#   objstorage:
   	#     cls: pathslicing
   	#     root: /home/storage/swh-storage/
   	#     slicing: 0:1/1:5
 
   	storage:
   	  cls: remote
 	    url: http://localhost:5002/
 
   	indexer_storage:
   	  cls: remote
   	  args:
   	    url: http://localhost:5007/
 
   	# storage to read sha1's content
   	# adapt this to your need
   	# locally: this needs to match your storage's setup
   	objstorage:
   	  cls: pathslicing
 	    slicing: 0:1/1:5
  	    root: /home/storage/swh-storage/
 
   	destination_task: swh.indexer.tasks.SWHOrchestratorTextContentsTask
   	rescheduling_task: swh.indexer.tasks.SWHContentMimetypeTask
 
 
 - Fossology indexer at
   ``~/.config/swh/indexer/fossology_license.yml``
 
 .. code-block:: yaml
 
     # storage to read sha1's metadata (path)
   	# storage:
   	#   cls: local
   	#   db: "service=swh-dev"
   	#   objstorage:
   	#     cls: pathslicing
   	#     root: /home/storage/swh-storage/
   	#     slicing: 0:1/1:5
 
   	storage:
   	  cls: remote
   	  url: http://localhost:5002/
 
   	indexer_storage:
   	  cls: remote
   	  args:
   	    url: http://localhost:5007/
 
   	# storage to read sha1's content
   	# adapt this to your need
   	# locally: this needs to match your storage's setup
   	objstorage:
   	  cls: pathslicing
 	    slicing: 0:1/1:5
 	    root: /home/storage/swh-storage/
 
   	workdir: /tmp/swh/worker.indexer/license/
 
   	tools:
   	  name: 'nomos'
   	  version: '3.1.0rc2-31-ga2cbb8c'
   	  configuration:
   	    command_line: 'nomossa <filepath>'
 
 
 - Worker at
   ``~/.config/swh/worker.yml``
 
 .. code-block:: yaml
 
   task_broker: amqp://guest@localhost//
   	task_modules:
   	  - swh.loader.svn.tasks
   	  - swh.loader.tar.tasks
   	  - swh.loader.git.tasks
   	  - swh.storage.archiver.tasks
   	  - swh.indexer.tasks
   	  - swh.indexer.orchestrator
   	task_queues:
   	  - swh_loader_svn
   	  - swh_loader_tar
   	  - swh_reader_git_to_azure_archive
   	  - swh_storage_archive_worker_to_backend
   	  - swh_indexer_orchestrator_content_all
   	  - swh_indexer_orchestrator_content_text
   	  - swh_indexer_content_mimetype
-  	  - swh_indexer_content_language
-  	  - swh_indexer_content_ctags
   	  - swh_indexer_content_fossology_license
   	  - swh_loader_svn_mount_and_load
   	  - swh_loader_git_express
   	  - swh_loader_git_archive
   	  - swh_loader_svn_archive
   	task_soft_time_limit: 0
 
 
 Database
 --------
 
 swh-indxer uses a database to store the indexed content. The default
 db is expected to be called swh-indexer-dev.
 
 Create or add  ``swh-dev`` and ``swh-indexer-dev`` to
 the ``~/.pg_service.conf`` and ``~/.pgpass`` files, which are postgresql's
 configuration files.
 
 Add data to local DB
 --------------------
 from within the ``swh-environment``, run the following command::
 
   make rebuild-testdata
 
 and fetch some real data to work with, using::
 
    python3 -m swh.loader.git.updater --origin-url <github url>
 
 Then you can list all content files using this script::
 
   #!/usr/bin/env bash
 
   psql service=swh-dev -c "copy (select sha1 from content) to stdin" | sed -e 's/^\\\\x//g'
 
 Run the indexers
 -----------------
 Use the list off contents to feed the indexers with with the
 following command::
 
   ./list-sha1.sh | python3 -m swh.indexer.producer --batch 100 --task-name orchestrator_all
 
 Activate the workers
 --------------------
 To send messages to different queues using rabbitmq
 (which should already be installed through dependencies installation),
 run the following command in a dedicated terminal::
 
   python3 -m celery worker --app=swh.scheduler.celery_backend.config.app \
                  --pool=prefork \
                  --concurrency=1 \
                  -Ofair \
                  --loglevel=info \
                  --without-gossip \
                  --without-mingle \
                  --without-heartbeat 2>&1
 
 With this command rabbitmq will consume message using the worker
 configuration file.
 
 Note: for the fossology_license indexer, you need a package fossology-nomossa
 which is in our `public debian repository
 <https://wiki.softwareheritage.org/index.php?title=Debian_packaging#Package_repository>`_.