swh.indexer 2.4.1

Software Heritage Content Indexer

swh-indexer

Tools to compute multiple indexes on SWH's raw contents:

• content:
  • mimetype
  • ctags
  • language
  • fossology-license
  • metadata
• revision:
  • metadata

An indexer is in charge of:

• looking up objects
• extracting information from those objects
• store those information in the swh-indexer db

There are multiple indexers working on different object types:

• content indexer: works with content sha1 hashes
• revision indexer: works with revision sha1 hashes
• origin indexer: works with origin identifiers

Indexation procedure:

• receive batch of ids
• retrieve the associated data depending on object type
• compute for that object some index
• store the result to swh's storage

Current content indexers:

• mimetype (queue swh_indexer_content_mimetype): detect the encoding and mimetype

• language (queue swh_indexer_content_language): detect the programming language

• ctags (queue swh_indexer_content_ctags): compute tags information

• fossology-license (queue swh_indexer_fossology_license): compute the license

• metadata: translate file into translated_metadata dict

Current revision indexers:

• metadata: detects files containing metadata and retrieves translated_metadata in content_metadata table in storage or run content indexer to translate files.