Branch: refs/heads/juraj-728-null-commit-issue
  Home:   https://github.com/jenkinsci/codescene-plugin
  Commit: a6c2780c61e5b1a4dcf6775da0bcbb299ac86290
      
https://github.com/jenkinsci/codescene-plugin/commit/a6c2780c61e5b1a4dcf6775da0bcbb299ac86290
  Author: Juraj Martinka <juma...@gmail.com>
  Date:   2018-12-04 (Tue, 04 Dec 2018)

  Changed paths:
    M src/main/java/org/jenkinsci/plugins/codescene/CodeSceneBuilder.java
    M src/main/java/org/jenkinsci/plugins/codescene/Domain/Commit.java

  Log Message:
  -----------
  ENTERPRISE-728: WIP fix "null commit" issue.


  Commit: a8d51fc3cc247e2b84fb40c2dee061a716f4c00d
      
https://github.com/jenkinsci/codescene-plugin/commit/a8d51fc3cc247e2b84fb40c2dee061a716f4c00d
  Author: Juraj Martinka <juma...@gmail.com>
  Date:   2018-12-04 (Tue, 04 Dec 2018)

  Changed paths:
    M src/main/java/org/jenkinsci/plugins/codescene/CodeSceneBuilder.java

  Log Message:
  -----------
  ENTERPRISE-728: Use base revision if no previous successful commit is 
available.

This was a problem when the build was first run for a new branch without any 
previous OK build.
In that case, the "GIT_PREVIOUS_SUCCESSFUL_COMMIT" env variable was set to null,
which lead to an exception in the Commit class constructor and early job 
termination.

The issue was introduced by recent refactoring (using Commit domain class 
instead of pure Strings).
However, even the former solution (with Strings) seems to be suboptimal,
because in that case following git command was used to get commit range:
```
git log --pretty='%%H' ..<current_commit_sha>"
```
, which lead to an empty commit range.


Compare: 
https://github.com/jenkinsci/codescene-plugin/compare/a6c2780c61e5^...a8d51fc3cc24
      **NOTE:** This service has been marked for deprecation: 
https://developer.github.com/changes/2018-04-25-github-services-deprecation/

      Functionality will be removed from GitHub.com on January 31st, 2019.

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