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Software Open Access

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

Baltes, Sebastian

Data collector(s)
Knack, Jascha

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 Travis CI, 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 Travis CI. This effect has also been reported in related work. However, we observed the same effect in a random sample of GitHub projects—the effect is likely to be caused by the growing adoption of the pull-based software development model instead of the introduction of CI.

To execute the analysis scripts, you also need to download the corresponding dataset: http://doi.org/10.5281/zenodo.1183244
Files (1.3 MB)
Name Size
1_extract_project_sample.R
md5:b1e107272c88a394987075be61fbdd30
815 Bytes Download
1_get_project_data.sql
md5:eb66af3d0c01105df72aa8130591c220
5.9 kB Download
1_tr_projects_schema.txt
md5:6c4423770b2af7aedea0094365e5031b
1.7 kB Download
2_commits_merges.sql
md5:5cd2fce97bc5ee143e3412db2fc1ab1a
2.5 kB Download
3_commit_hash_count_branches.csv
md5:b5bd8eee1085afd01b7b1641793b15c2
486.8 kB Download
3_commit_hash_count_branches.pdf
md5:f5ef56b07a4a0ef649858c5c6d945e82
8.1 kB Download
3_commit_hash_count_branches.R
md5:be26ce63a7541aa835925804237bf0fe
4.2 kB Download
3_default_branch.sql
md5:59b6bc2dd304c06b22ec784a1e341c0e
17.4 kB Download
3_hash_count_branches.pdf
md5:7da7b5c059b220fc18dad9ce9a7e58c1
8.5 kB Download
3_last_build_vs_activity.csv
md5:279a3fbfbccb044714b41ee901fe1cef
11.1 kB Download
3_last_build_vs_activity.pdf
md5:5023e3aba296baad5cdc866c74ca7c12
5.9 kB Download
3_last_build_vs_activity.R
md5:db0192cfa756d27f33f102158d545866
4.2 kB Download
3_merge_hash_count_branches.csv
md5:ff07de6b062aeec3b197b9b605989262
451.1 kB Download
3_merge_hash_count_branches.pdf
md5:44ab248da0f800093f95d5500a8a97a4
8.7 kB Download
3_projects_filtered_build_activity.csv
md5:6d259ac93eeb7d5fd03d05633e719471
7.1 kB Download
3_projects_filtered_commit_count.csv
md5:a8aed385bfe4232791d91a6debfa4452
10.6 kB Download
4_before_during_ci.sql
md5:ea15a5185e91132691f6e95a5180f229
13.9 kB Download
5_project_sample_languages.sql
md5:99cc30c55ad59e547b3c0e19911c8322
1.5 kB Download
6_commits_builds.sql
md5:63120620b89d181e71a39f12f771f6ab
4.6 kB Download
7_comparison_sample.sql
md5:ddb4e27b4082b2721ff459a8fb3bd29b
5.9 kB Download
functions.R
md5:6bd22d3a45a65d339e31017b54efe948
3.0 kB Download
global.R
md5:af1714b76507550bcd4b73d7b5279c8a
11.7 kB Download
tr_projects.csv
md5:d9a84c07a94c4fdfc8a995ebff46e488
192.7 kB Download
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