omega を Homebrew, MacPorts でインストール

プロジェクトリンク

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• リポジトリ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• dbi2omega
• mbox2omega
• omindex
• omindex-list
• scriptindex

プロジェクトの歴史

Omega's history is bound to Xapian. The Xapian project traces its code lineage through Open Muscat, a GPL release derived from earlier Muscat information-retrieval work, and Xapian 0.5.0 was released on September 20, 2002.

Omega 1.0.0 shipped on May 17, 2007 in the Xapian release family and included UTF-8 operation for Omega and its indexers. Later Omega releases continued to track Xapian's stable branches, with the download page grouping xapian-core, omega, and language bindings as the project's release trio.

採用の歴史

Omega filled a practical niche: small sites, documentation collections, and intranets could get full-text search without writing an application directly against Xapian's API. A 2008 Linux.com walkthrough presented Xapian plus Omega as a quick way to index HTML, PDF, PHP, and other content for a website search interface.

Distribution packaging reinforces that operational role. Debian's xapian-omega package description lists the omega CGI app, omindex, and scriptindex, while MacPorts and Homebrew expose the same package-family idea to macOS users.

使われ方

Operators create or update one or more Xapian databases with omindex or scriptindex, then point the omega CGI application at those databases. Omega can search multiple databases and use templates and CGI parameters to shape the web result page.

scriptindex matters for package nerds because it turns arbitrary structured input into a Xapian database using an indexing script. That makes Omega useful beyond static website crawling: it can index mailboxes, generated metadata, and custom document streams.

パッケージ好きにとっての重要性

Omega is interesting because it packages an information-retrieval library as Unix-style tools: indexers, converters, a CGI binary, configuration files, and documentation. It is search infrastructure in the classic distro sense, not a hosted search service or framework plugin.

It also preserves the CGI-era deployment model in a maintained search stack. That makes it a useful artifact for understanding how full-text search was commonly bolted onto websites before every application framework grew its own search integration story.

タイムライン

• September 20, 2002: Xapian 0.5.0 is released after earlier Open Muscat and OmSee lineage.
• May 17, 2007: Omega 1.0.0 ships with UTF-8 support for Omega and the indexers.
• October 3, 2008: Linux.com publishes a practical guide for adding website search with Xapian and Omega.
• March 16, 2026: Omega 2.0.0 release notes add click logging and training-data support for xapian-letor and remove obsolete htdig2omega scripts.

Related projects

• Omega is one member of the Xapian family beside xapian-core and xapian-bindings. Related search packages in the same mental shelf include Recoll, Swish-e, Lucene/Solr, and Sphinx, but Omega's distinguishing shape is a CGI frontend plus Xapian-native indexing tools.

ソース

• https://packages.debian.org/trixie/web/xapian-omega
• https://www.linux.com/news/adding-search-your-web-site-xapian-and-omega/
• https://xapian.org/
• https://xapian.org/docs/omega/overview.html
• https://xapian.org/docs/omega/quickstart.html
• https://xapian.org/docs/xapian-core-1.2.25/NEWS
• https://xapian.org/docs/xapian-omega-1.2.25/NEWS
• https://xapian.org/docs/xapian-omega-2.0.0/NEWS
• https://xapian.org/download
• https://xapian.org/history