I have recently started using gradle in a project and I am running the standard
gradle clean init build
I noticed that in many of the tasks that are running, I get this UP-TO-DATE message in the console, next to the current task that's running. eg:-
:foo:bar:test UP-TO-DATE
I am curious as to what does this message mean. Couldn't find any documentation around the same.
Everything that Gradle does is a task. Most tasks have inputs and outputs declared. Gradle will determine if a task is up to date by checking the inputs and outputs.
For example, your compile task input is the source code. If the source code hasn't changed since the last compile, then it will check the output to make sure you haven't blown away your class files generated by the compiler. If the input and output is unchanged, it considers the task "up to date" and doesn't execute that task. This can save a lot of time, especially on large builds.
BTW: In case you really want to bypass this build optimization, you can use the --rerun-tasks command-line option to enforce execution of every task.
see documentation of gradle command-line options
Gradle is an incremental build system. This means that it checks that a task must really be executed before actually executing it, in order to be faster.
So, for example, if you already compiled your source files in a previous build, and didn't modify any source file (nor any other input of the compile task), then Gradle won't recompile all the source files, because it know it will lead to exactly the same output as the one already present in the build folder. And the compilation is thus safely skipped, leading to a faster build.
More information in the documentation
I faced the similar problem tried all the options, but the following one worked for me:
gradle -Dorg.gradle.daemon=false <your tasks>
Related
I've got a generic task in my Gradle build that copies some configuration files to be included in the build, but aren't required for compiling or anything else (they're used at runtime). Basically:
val copyConfiguration by tasks.registering(Copy::class) {
from("${projectDir}/configuration")
into("${buildDir}/")
}
This however leads to an issue in every other task as I now get the Gradle warning about how the tasks use this output without declaring an explicit or implicit dependency
Execution optimizations have been disabled for task ':jacocoTestCoverageVerification' to ensure correctness due to the following reasons:
- Gradle detected a problem with the following location: '...'. Reason: Task ':jacocoTestCoverageVerification' uses this output of task ':copyConfiguration' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed. Please refer to https://docs.gradle.org/7.4.1/userguide/validation_problems.html#implicit_dependency for more details about this problem.
Now this is only a warning, and the build succeeds, and my service starts up and runs fine. But it does clog my output making it harder to find the line where something went wrong and is in general an eyesore. I'd like to somehow remove that warning. I saw (from the wiki) that the general solution for this is to write an explicit dependency in the task definition, but since this is happening for every task (from compile, to test, to ktlint, to jacoco, etc.) I don't really want to do that.
Is there an alternative, like an anti-dependency, wherein I can tell Gradle that it shouldn't care about the output of the :copyConfiguration task?
Given (emphasis mine to show what to look for)
Execution optimizations have been disabled for task 'spotlessJava' to ensure correctness due to the following reasons:
Gradle detected a problem with the following location: '...\build\generated\source\proto\main\grpc'. Reason: Task 'spotlessJava' uses this output of task 'generateProto' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed. Please refer to https://docs.gradle.org/7.5.1/userguide/validation_problems.html#implicit_dependency for more details about this problem.
Add the following to build.gradle
tasks.named("spotlessJava").configure { dependsOn("generateProto") }
I had a similar issue and funny that it started with a task related to Jacoco.
I documented a solution here https://discuss.gradle.org/t/task-a-uses-this-output-of-task-b-without-declaring-an-explicit-or-implicit-dependency/42896
In short, what worked for me was to get the location with the problem using the task properties, e.g. getOutputs.
Hope this helps.
IDEA. For most time, when I modify a build.gradle file. It takes a long time to importing or sync the changes. What does it doing? How can I see action details.
IntelliJ has to run the gradle build file to import its configuration. Sorry I don't remember what exact task it runs.
When Gradle runs any task, it first has a configuration stage where it reads through all of the build files and gets ready to run tasks. For larger build files this can take quite some time.
To find out what is taking Gradle so long, check out the "Build Scans" section and other performance optimization tips here: https://guides.gradle.org/performance/
I want to write a bash script which grabs only the outputted jars for the modules within my project which have changed (after a build) so that I can copy them up to a server. I don't want to have to copy every single module jar every time, as in if you do a full clean build. It's a gradle project using git. I know that gradle can do an incremental build based on only the modules whose code has updated but is there a way this plugin (assuming it's a plugin) can be called? I have done some searching online but can't find any info.
Gradle has the notion of inputs and outputs that are associated with a task. Gradle takes snapshots of the inputs and outputs for a task the first time they run and on each subsequent execution. These snapshots contain hashes of the contents of each file. This enables gradle to check upon subsequent executions, if the inputs and/or outputs have changed and decide if the task needs to be executed again.
This feature is also available to custom gradle tasks (those that you write yourself) and is one way in which you could implement the behaviour you are looking for. You could invoke the corresponding task from a bash script, if needed. More details can be found here:
Gradle User Guide, Chapter 14.
Otherwise, I imagine your bash script might need to compare the modified timestamps of the files in question or to compute and compare hashes itself.
The venerable rsync exists to do exactly this kind of thing: find differences between an origin and a (possibly remote) destination, and synchronize them, with lots of options to choose how to detect the differences and how to transfer them.
Or you could use find to search for .jar files modified in the last N minutes ...
Or you could use inotifywait to detect filesystem changes as they happen...
I get that getting Gradle to tell you directly what has been built would be the most logical thing, but for that I'd say you have to think more Java/Groovy than Bash... and fight your way through the manual.
We have a strange issue where randomly and infrequently, the compileJava task which deletes the META-INF folder and compiled classes to start, runs but the processResources task reports up-to-date, even though the META-INF directory clearly doesn't exist.
This bites us big time because it's possible that the artifacts make it all the way to production without an applicationContext.xml!
It costs very little for us to run that task, is it possible to force it to run, no matter what?
Maybe there's some kind of bug that fails to clear gradle cache. One possible solution would be to first force the task to clean its own output by running cleanProcessResources.
If that does not work then try overriding the upToDateWhen predicate of your task's outputs like this:
processResources.outputs.upToDateWhen{ false }
However I don't know if this API is permanent.
We have a lot of tests. I can break these up so that they run on seperate agents after an initial compile build happens, but is there a way I can recombine these results? Having 8 build configurations that all need to be green makes it hard to see if you've got one ubergreen build.
Is there a way in TeamCity to recombine / join builds once we've split them out? TW-9990 might help - allowing ANDs in the dependencies.
We found the answer which certainly works from TeamCity 5:
One compile build,
N test only builds that take compile.zip!** and copy to where the compile output would normally be. (via a template)
Consolidated finish:
Finish Build Trigger: Wait for a successful build in: ...
Snapshot Dependencies: Do not run new build if there is a suitable one
Only use successful builds from suitable ones
This all seems to work nicely and the whole shbang is easily copied for branches etc. Am very happy - this has worked well for us for many months now.
No idea how to do that natively. Here's my first thoughts on how I would try and tackle such a thing though:
Saving test results to files
Publishing the test result files as build artifacts
Creating a 'Merge build'
Adding artifact dependency onto the individual test projects
Writing a custom 'build' script using something like (N)Ant. This would parse the individual test results and publish the results as per the TC KB
Good luck!
Thinking outside the box you could have an overall build which doesn't really do anything (or use one of your test build configs as your 'master'), with snapshot dependencies on each of your split test builds. That way if any of them fail, the 'master' will fail because one the dependent build failed.
TW-9990 looks to be concerned with build triggering rather than dependencies.