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(No) Influence of Continuous Integration on the Commit Activity in GitHub Projects — Supplementary Material

Baltes, Sebastian


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  <identifier identifierType="DOI">10.5281/zenodo.1406144</identifier>
  <creators>
    <creator>
      <creatorName>Baltes, Sebastian</creatorName>
      <givenName>Sebastian</givenName>
      <familyName>Baltes</familyName>
      <nameIdentifier nameIdentifierScheme="ORCID" schemeURI="http://orcid.org/">0000-0002-2442-7522</nameIdentifier>
      <affiliation>University of Trier</affiliation>
    </creator>
  </creators>
  <titles>
    <title>(No) Influence of Continuous Integration on the Commit Activity in GitHub Projects — Supplementary Material</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2018</publicationYear>
  <subjects>
    <subject>continuous integration</subject>
    <subject>empirical software engineering</subject>
    <subject>github</subject>
    <subject>git</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2018-08-30</date>
  </dates>
  <resourceType resourceTypeGeneral="Software"/>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/1406144</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.5281/zenodo.1182934</relatedIdentifier>
  </relatedIdentifiers>
  <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;A core goal of Continuous Integration (CI) is to make small incremental changes to software projects, which are integrated frequently into a mainline repository or branch. Our paper presents an empirical study that investigates if developers adjust their commit activity towards the above-mentioned goal after projects start using CI. We analyzed the commit and merge activity in 93 GitHub projects that introduced the hosted CI system &lt;em&gt;Travis CI&lt;/em&gt;, but have also been developed on GitHub for at least one year before introducing CI. In our analysis, we only found one non-negligible effect, an increased merge ratio, meaning that there were more merging commits in relation to all commits after the projects started using &lt;em&gt;Travis CI&lt;/em&gt;. This effect has also been reported in related work. However, we observed the same effect in a random sample of 60 GitHub projects not using CI. Thus, it is unlikely that the effect is caused by the introduction of CI alone. We conclude that: (1) in our sample of projects, the introduction of CI did not lead to major changes in developers&amp;#39; commit activity, and (2) it is important to compare the commit activity to a baseline before attributing an effect to a treatment that may not be the cause for the observed effect.&lt;/p&gt;</description>
    <description descriptionType="Other">To execute the analysis scripts, you also need to download the corresponding dataset: https://doi.org/10.5281/zenodo.1140260</description>
  </descriptions>
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