Technical note Open Access

A Dataset for GitHub Repository Deduplication: Extended Description

Spinellis, Diomidis; Kotti, Zoe; Mockus, Audris


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  <identifier identifierType="DOI">10.5281/zenodo.3740595</identifier>
  <creators>
    <creator>
      <creatorName>Spinellis, Diomidis</creatorName>
      <givenName>Diomidis</givenName>
      <familyName>Spinellis</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0003-4231-1897</nameIdentifier>
      <affiliation>Athens University of Economics and Business</affiliation>
    </creator>
    <creator>
      <creatorName>Kotti, Zoe</creatorName>
      <givenName>Zoe</givenName>
      <familyName>Kotti</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0003-3816-9162</nameIdentifier>
      <affiliation>Athens University of Economics and Business</affiliation>
    </creator>
    <creator>
      <creatorName>Mockus, Audris</creatorName>
      <givenName>Audris</givenName>
      <familyName>Mockus</familyName>
      <affiliation>University of Tennessee</affiliation>
    </creator>
  </creators>
  <titles>
    <title>A Dataset for GitHub Repository Deduplication: Extended Description</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2020</publicationYear>
  <subjects>
    <subject>deduplication</subject>
    <subject>fork</subject>
    <subject>project clone</subject>
    <subject>GitHub</subject>
    <subject>dataset</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2020-04-21</date>
  </dates>
  <language>en</language>
  <resourceType resourceTypeGeneral="Text">Technical note</resourceType>
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  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;GitHub projects can be easily replicated through the site&amp;#39;s fork&lt;br&gt;
process or through a Git clone-push sequence.&amp;nbsp; This is a problem for&lt;br&gt;
empirical software engineering, because it can lead to skewed results&lt;br&gt;
or mistrained machine learning models.&amp;nbsp; We provide a dataset of 10.6&lt;br&gt;
million GitHub projects that are copies of others, and link each record&lt;br&gt;
with the project&amp;#39;s ultimate parent.&amp;nbsp; The ultimate parents were derived&lt;br&gt;
from a ranking along six metrics.&amp;nbsp; The related projects were calculated&lt;br&gt;
as the connected components of an 18.2 million node and 12 million&lt;br&gt;
edge denoised graph created by directing edges to ultimate parents.&lt;br&gt;
The graph was created by filtering out more than 30 hand-picked and 2.3&lt;br&gt;
million pattern-matched clumping projects.&amp;nbsp; Projects that introduced&lt;br&gt;
unwanted clumping were identified by repeatedly visualizing shortest path&lt;br&gt;
distances between unrelated important projects.&amp;nbsp; Our dataset identified&lt;br&gt;
30 thousand duplicate projects in an existing popular reference dataset&lt;br&gt;
of 1.8 million projects.&amp;nbsp; An evaluation of our dataset against another&lt;br&gt;
created independently with different methods found a significant overlap,&lt;br&gt;
but also differences attributed to the operational definition of what&lt;br&gt;
projects are considered as related.&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;</description>
  </descriptions>
  <fundingReferences>
    <fundingReference>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/825328/">825328</awardNumber>
      <awardTitle>Fine-Grained Analysis of Software Ecosystems as Networks</awardTitle>
    </fundingReference>
  </fundingReferences>
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