Google Code Search
Google Code Search
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 | This article needs to be updated. (December 2018) |
 | |
Type of site | Search engine |
|---|---|
| Available in | All languages |
| Owner | |
| Website | www.google.com/codesearch |
| Launched | October 5, 2006 (2006-10-05) |
| Current status | Discontinued as of 15 January 2012 |
Google Code Search was a free beta product from Google which debuted in Google Labs on October 5, 2006, allowing web users to search for open-source code on the Internet. Features included the ability to search using operators, namely lang:, package:, license: and file:.
The code available for searching was in various formats including tar.gz, .tar.bz2, .tar, and .zip, CVS, Subversion, git and Mercurial repositories.
Contents
1 Regular expression engine
2 Discontinuation
3 See also
4 References
5 External links
Regular expression engine[edit]
The site allowed the use of regular expressions in queries, which at the time was not offered by any other search engine for code.[citation needed] This makes it resemble grep, but over the world's public code. The methodology employed combines a trigram index with a custom-built, denial-of-service resistant regular expression engine.[1]
In March 2010, the code of RE2, the regular expression engine used in Google Code Search, was made open source.[2]
Google Code Search supported POSIX extended regular expression syntax, excluding back-references, collating elements, and collation classes.
Languages not officially supported could be searched for using the file: operator to match the common file extensions for the language.
Discontinuation[edit]
In October 2011, Google announced that Code Search was to be shut down along with the Code Search API.[3] The service remained online until March 2013,[4] and it now returns a 404.
In January 2012, Russ Cox published an overview of history and the technical aspects of the tool, and open-sourced a basic implementation of a similar functionality as a set of standalone programs that can run fast indexed regular expression searches over local code.[5]
See also[edit]
Sourcegraph [1]
- Codase
- Krugle
Open Hub (a merge of Ohloh and Koders)- Merobase
- OpenGrok
SearchCode [2]
References[edit]
^ Russ Cox (January 2012). "Regular Expression Matching with a Trigram Index (or: How Google Code Search Worked)"..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ "RE2: a principled approach to regular expression matching".
^ Horowitz, Bradley (2011-10-14). "Official Blog: A fall sweep". Googleblog.blogspot.com. Retrieved 2013-07-09.
^ "Replacement for Google Code Search?". Stack Overflow.
^ codesearch on GitHub
External links[edit]
Archived 12 November 2010 at the Wayback Machine
Cindex/Csearch - command-line file search tool, based on ideas from GCS
Version of Code Search, limited to the Chromium project
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Category
PortalCategories:
- Beta software
- Defunct code search engines
- Discontinued Google services
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