How to prevent building if no change is detected？

[殷乐]

I wonder how to prevent building if no change is detected, meaning that no new commit is detected and a duplicated package will be built.

The plan shall fail immediately or notify the user if such condition is met.

[Alexey Chystoprudov · Accepted solution]

You can use plan variables to compare if there're commits between builds

${bamboo.planRepository.1.revision} != ${bamboo.planRepository.1.previousRevision}

[殷乐]

So I can depend on this condition in script in the plan?

[Alexey Chystoprudov]

yes

[殷乐]

I wonder whether the previous revision is last successful build or just simply last build regardless of building result. Can I still depend on the condition if last build failed?

[Alexey Chystoprudov]

It's value from previous build, regardless of its state

[殷乐]

Then how can I check whether last build is successful? in case I need to rebuild when build failed.