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  1. Jenkins
  2. JENKINS-23054

Gerrit trigger doesn't work well with shallow clones (git --depth=1)

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      In order to speed up clones for very large repositories, I want to be able to use shallow clones.

      Currently, using shallow clones ends up doing the following git commands:

      Cloning repository ssh://gerrit.example.com:29418/myrepo.git
 > git init /a/workspace/engine-copyright-check-gerrit
Fetching upstream changes from ssh://gerrit.example.com:29418/myrepo.git
 > git --version
 > git fetch --tags --progress ssh://gerrit.example.com:29418/myrepo.git +refs/heads/*:refs/remotes/origin/* --depth=1
 > git config remote.origin.url ssh://gerrit.example.com:29418/myrepo.git
 > git config remote.origin.fetch +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url ssh://gerrit.example.com:29418/myrepo.git
Fetching upstream changes from ssh://gerrit.example.com:29418/myrepo.git
 > git fetch --tags --progress ssh://gerrit.example.com:29418/myrepo.git refs/changes/40/20740/1
 > git rev-parse FETCH_HEAD^{commit}
Checking out Revision e976b99ee4a8b6b65ea351f31c5cd4509a5eafaf (origin/release)
 > git config core.sparsecheckout
 > git checkout -f e976b99ee4a8b6b65ea351f31c5cd4509a5eafaf
 > git rev-parse FETCH_HEAD^{commit}
 > git rev-list 0ecf38b5c187d237b3689dcd2d5d52ba8c295610

      I expected something more like:

      Cloning repository ssh://gerrit.example.com:29418/myrepo.git
 > git init /a/workspace/engine-copyright-check-gerrit
Fetching upstream changes from ssh://gerrit.example.com:29418/myrepo.git
 > git --version
 > git fetch --progress ssh://gerrit.example.com:29418/myrepo.git refs/changes/40/20740/1 --depth=1
 > git rev-parse FETCH_HEAD^{commit}
Checking out Revision e976b99ee4a8b6b65ea351f31c5cd4509a5eafaf (origin/release)
 > git config core.sparsecheckout
 > git checkout -f e976b99ee4a8b6b65ea351f31c5cd4509a5eafaf
 > git rev-parse FETCH_HEAD^{commit}
 > git rev-list 0ecf38b5c187d237b3689dcd2d5d52ba8c295610

      The changes are:

      1. Remove --tags flag
      2. Fetch only those specific changes

      The change, for our repository, is massively faster (a few seconds vs. 3 minutes) and less disk space (40mb vs 3gb).

            docwhat Christian Höltje
            docwhat Christian Höltje
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              Created:
              Updated:
              Resolved: