更改Maven快照时间戳

Question

When deploying a snapshot file to a maven repository, I want to be able to control the timestamp that is being used in the resulting file name, right now I see something like this show up:

/snapshots/com/exampleinc/example/0.0.0-SNAPSHOT/example-0.0.0-20190224.230223-37.jar

I want to be able to set 20190224.230223 when running mvn deploy .

I tried setting maven.build.timestamp however it had no effect on it.

I can't find any documentation on how to do this, and I am not sure about which bit of code is actually controlling this so can't just dig through it.

The reason behind wanting to set this value is I want that timestamp embedded in the manifest file so that we can read it within the java process & associate it back to the original file without needing to read each jar (as there could be hundreds of builds for the same snapshot version)

Answer 1

Build timestamp can be customized by declaring the property maven.build.timestamp.format , you can find the documentation here

<properties>
  <maven.build.timestamp.format>yyyyMMdd-HHmmss</maven.build.timestamp.format>
</properties>

Answer 2

We write a "build number" to a properties file in the jar (MANIFEST.MF would work as well) which represents the last part of the created jar name ( 37 in your case).

With this information, it is possible to uniquely identify the jar, eg by questioning Nexus for the list of all timestamps for a given SNAPSHOT and extract the correct one.