http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Google_Code_SearchGoogle Code Search - Revision history2026-10-26T17:45:32ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=Google_Code_Search&diff=3621047&oldid=previmported>Shyuku at 12:44, 7 May 20252025-05-07T12:44:02Z<p></p>
<p><b>New page</b></p><div>{{Short description|Beta product from Google}}<br />
{{Distinguish|Google Code}}<br />
{{Update|date=December 2018}}<br />
{{Infobox website<br />
| name = Google Code Search<br />
| logo = Google Code Search.png<br />
| logo_size = 250px<br />
| screenshot = <br />
| caption = <br />
| commercial = <br />
| type = [[Search engine]]<br />
| language = All languages<br />
| registration = <br />
| owner = [[Google]]<br />
| launch_date = {{Start date and age|2006|10|05}}<br />
| current_status = Discontinued as of 7 May 2025<br />
| revenue = <br />
| url = www.google.com/codesearch<br />
}}<br />
<br />
'''Google Code Search''' was a free [[Development stage#Beta|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 {{mono|lang:}}, {{mono|package:}}, {{mono|license:}}, and {{mono|file:}}.<br />
<br />
The code available for searching was in various formats including tar.gz, .tar.bz2, .tar, and .zip, [[Concurrent Versions System|CVS]], [[Subversion (software)|Subversion]], [[git]] and [[Mercurial]] repositories.<br />
<br />
Google Code Search covered many open-source projects, and as such is different from the "Code Search for Google Open source projects" that was released afterwards.<ref>{{Cite web|url=https://opensource.googleblog.com/2020/04/code-search-for-google-open-source.html|title=Code Search for Google open source projects|website=Google Open Source Blog|access-date=2020-04-01}}</ref><ref>{{Cite web|url=https://cs.opensource.google/|website=cs.opensource.google|access-date=2020-04-01|title=Google Open Source}}</ref><br />
<br />
== Regular expression engine ==<br />
<br />
The site allowed the use of [[regular expression]]s in queries, which at that time was not offered by any other search engine for code.{{Citation needed|date=October 2009}} This makes it resemble [[grep]], but over the world's public code. The methodology employed, sometimes called [[trigram search]], combines a [[trigram]] [[Search engine indexing|index]] with a custom-built, [[ReDoS|denial-of-service]] resistant [[regular expression]] engine.<ref>{{cite web |url = http://swtch.com/~rsc/regexp/regexp4.html |title = Regular Expression Matching with a Trigram Index (or: How Google Code Search Worked) |author = Russ Cox |date = January 2012 |access-date = 2012-01-26 |archive-url = https://web.archive.org/web/20120128183712/http://swtch.com/~rsc/regexp/regexp4.html |archive-date = 2012-01-28 |url-status = live }}</ref><br />
<br />
In March 2010, the code of [[RE2 (software)|RE2]], the regular expression engine used in Google Code Search, was made open source.<ref>{{cite web|url=https://opensource.googleblog.com/2010/03/re2-principled-approach-to-regular.html|title=RE2: a principled approach to regular expression matching|publisher=|access-date=2016-09-24|archive-url=https://web.archive.org/web/20160927023834/https://opensource.googleblog.com/2010/03/re2-principled-approach-to-regular.html|archive-date=2016-09-27|url-status=live}}</ref><br />
<br />
Google Code Search supported POSIX extended regular expression syntax, excluding back-references, collating elements, and collation classes.<br />
<br />
Languages not officially supported could be searched for using the file: operator to match the common file extensions for the language.<br />
<br />
== Discontinuation ==<br />
<br />
In October 2011, Google announced that Code Search was to be shut down along with the Code Search API.<ref>{{cite web |last = Horowitz |first = Bradley |url = http://googleblog.blogspot.com/2011/10/fall-sweep.html |title = Official Blog: A fall sweep |publisher = Googleblog.blogspot.com |date = 2011-10-14 |accessdate = 2013-07-09 |archive-url = https://web.archive.org/web/20111123221541/http://googleblog.blogspot.com/2011/10/fall-sweep.html |archive-date = 2011-11-23 |url-status = live }}</ref> The service remained online until March 2013,<ref>{{cite web|url=https://stackoverflow.com/questions/7778034/replacement-for-google-code-search|title=Replacement for Google Code Search?|website=Stack Overflow|access-date=2016-07-25|archive-url=https://web.archive.org/web/20171109120559/https://stackoverflow.com/questions/7778034/replacement-for-google-code-search|archive-date=2017-11-09|url-status=live}}</ref> and it now returns a [[HTTP 404|404]].<br />
<br />
In January 2012, Google developer 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.<ref>{{github|google/codesearch}}</ref><br />
<br />
== See also ==<br />
{{Portal|Computer programming}}<br />
* [[Krugle]]<br />
* [[Open Hub]] (a merge of Ohloh and [[Koders]])<br />
* [[Merobase]]<br />
* [[OpenGrok]]<br />
* [[Trigram search]]<br />
<br />
{{Clear}}<br />
<br />
==References==<br />
{{Reflist}}<br />
<br />
== External links ==<br />
* {{webarchive |url=https://web.archive.org/web/20101112131244/http://www.google.com//codesearch |date=12 November 2010 }}<br />
<br />
<br />
{{Google LLC}}<br />
<br />
[[Category:Code search engines]]<br />
[[Category:Defunct internet search engines]]<br />
[[Category:Discontinued Google services|Code Search]]</div>imported>Shyuku