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Google Kythe

google kythera, google kythe foundation
Google Kythe is a source code indexer and cross-referencer which describes itself as "pluggable, mostly language-agnostic ecosystem for building tools that work with code"


  • 1 Overview
  • 2 Grok
  • 3 Reception
  • 4 See also
  • 5 References
  • 6 External links
    • 61 Grok
    • 62 Kythe
    • 63 Similar projects


The core of Google Kythe is in defining language-agnostic protocols and data formats for representing, accessing and querying source code information as data Kythe relies on an instrumented build system and compilers that produce indexing information, semantic information and metadata in Kythe specified format This information obtained from running an instrumented build is stored in a language-agnostic graph structure Finally, this graph structure can be queried to answer questions about the code base

Google Kythe is an open-source project being developed by Google It is licensed under an Apache licence 20


Google Kythe originates from an internal project called Grok

Grok had been proposed by Steve Yegge in 2008 Yegge observed that software projects routinely use more than 3 programming languages, yet development tools tend to be language specific and don't handle multiple programming languages well Adding a support for a language to an IDE is hard and the ad-hoc analysis tools in IDEs tend to be inferior to real parsers and compilers

Some parts of Grok were publicly released even before Google Kythe was announced In 2010, Google released a Python static analyzer which has been developed as part of Grok

In 2012, C++, Java, Python, JS and "2 internal languages" were supported by Grok There was a browser client with support for querying the database and visually navigating through the source code There was an Emacs client

Chromium Code Search Browser uses Grok index to provide quick links to definition for every symbol in the source code


See also

  • Free software portal
  • OpenGrok
  • LXR Cross Referencer
  • Clang


  1. ^ "Google Open Source Blog: Kythe: a new approach to making developer tools" Google Open Source Blog 
  2. ^ "Kythe - An Overview of Kythe" kytheio 
  3. ^ "Google Kythe Website" Google Retrieved 23 February 2015 
  4. ^ Steve Yegge "Notes from the Mystery Machine Bus" plusgooglecom 
  5. ^ a b Bryan Summersett "Bryan Summersett - Steve Yegge and Grok" bsummnet 
  6. ^ "Issue 1541: new static analyzer from Google - Jython tracker" jythonorg 
  7. ^ "Chromium Code Search" 
  8. ^ "Kythe - Exploring Kythe's Sample Web UI" kytheio Retrieved 30 April 2015 

External links


  • Notes from the Mystery Machine Bus, blog
  • Steve Yegge and Grok, blog
  • Stanford Seminar - Google's Steve Yegge on GROK, lecture
  • Project Grok - Steve Yegge - Emacs Conference 2013, talk
  • Steve Yegge on Scalable Programming Language Analysis, talk


  • Kythe Google Kythe Homepage
  • Indexing Large, Mixed-Language Codebases, talk

Similar projects

  • Facebook pfff
  • srclib
  • Oracle Frappé
  • Microsoft Language Server Protocol designed as part of Visual Studio Code, with implementations for several languages and integrated by several other development tools

  1. ^ Hawes, Nathan; Barham, Ben "Using Clang to Visualize Large Codebases" PDF Retrieved 25 September 2015 

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Google Kythe

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