Module: Ucode::DbBuilder

Defined in:
lib/ucode/db_builder.rb

Overview

Builds the SQLite cache for one UCD version.

Single entry point: ‘DbBuilder.build(version)`. Streams the Coordinator output through an IndexBuilder, then persists the coalesced block + script ranges into a SQLite DB at `Cache.sqlite_path(version)`.

Streaming: the Coordinator yields one CodePoint at a time; the IndexBuilder folds it into per-property accumulators. Peak memory is the in-progress accumulators (~10 MB for the full UCD) plus one CodePoint — never all 160k CodePoints at once.

Class Method Summary collapse

Class Method Details

.build(version) ⇒ Pathname

Returns path to the built SQLite file.

Parameters:

  • version (String)

Returns:

  • (Pathname) —

    path to the built SQLite file



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# File 'lib/ucode/db_builder.rb', line 56

def build(version)
  Ucode::VersionResolver.validate!(version)

  ucd_dir = Cache.ucd_dir(version)
  unihan_dir = Cache.unihan_dir(version)
  db_path = Cache.sqlite_path(version)

  Cache.ensure_version_dir!(version)

  builder = IndexBuilder.new
  Coordinator.new.each_codepoint(ucd_dir: ucd_dir, unihan_dir: unihan_dir) do |cp|
    builder.add(cp)
  end

  write_db(db_path, version, builder.blocks_index, builder.scripts_index)
  db_path
end