I have a Gradle project with subprojects that I can issue separate build commands if I don't want to build all the subprojects at once. For example,
parent
subprojectA
subprojectB
subprojectC
I can then issue commands like ./gradlew :subprojectA:assemble :subprojectC:assemble. What I like to do is construct a meaning git tag from each subproject group and version values for those subprojects that are being built, i.e., group and version for only subprojectA and subprojectC in this case. I am thinking of writing a standalone plugin to do this but unsure where / how to get this information at build time. Any suggestions would be much appreciated.
Both group and version (as well as any other project property) is available globally in your build script.
task myTask << {
println group + "-" + version
}
If you are writing a binary plugin you can also access properties off the Project object itself via the property() method.
def group = project.property('group')
Edit
If you want to determine if a particular project is being built you can inspect the TaskExecutionGraph.
gradle.taskGraph.whenReady { graph ->
if (graph.hasTask(':subprojectA:assemble')) {
println 'Will build subprojectA'
}
}
Related
In my build script, when I configure the downloadAndUnzipFile task, I am explicitly querying output of downloadZipFile task. I expected this is sufficient for Gradle to infer a dependency between the tasks, but it apparently is not, because I get an error when invoking downloadAndUnzipFile`.
Execution failed for task ':downloadAndUnzipFile'.
> Cannot expand ZIP '/home/jdanek/repos/testing/gradle-infer-deps/build/1.0.zip' as it does not exist.
My build script build.gradle.kts is
import de.undercouch.gradle.tasks.download.Download
group = "org.example"
version = "1.0-SNAPSHOT"
plugins {
id("de.undercouch.download").version("4.0.4")
}
tasks {
val downloadZipFile by registering(Download::class) {
src("https://github.com/michel-kraemer/gradle-download-task/archive/1.0.zip")
dest(File(buildDir, "1.0.zip"))
}
val downloadAndUnzipFile by registering(Copy::class) {
from(zipTree(downloadZipFile.get().outputFiles.first()))
into(buildDir)
}
}
I also tried
from(zipTree(downloadZipFile.get().outputFiles.first()))
and that does not define a dependency either.
My Gradle is the latest 6.2.2.
In order for Gradle to discover task dependencies, they have to use specific types for their inputs and outputs so that Gradle can track the dependencies for you. See this documentation page on the topic.
In your use case, the de.undercouch.download plugin seems to expose a simple List<File> which is not a rich type, so Gradle cannot figure out the link. In that case you have be explicit about the task dependency, using dependsOn(downloadZipFile)
I have studied thousand similar questions on SO and I am still lost. I have a simple multiproject build:
rootProject.name = 'mwe'
include ":Generator"
include ":projectB"
include ":projectC"
with a top level build.gradle as follows (settings.gradle):
plugins { id "java" }
allprojects { repositories { jcenter() } }
and with two kinds of project build.gradle files. The first one (Generator) exposes a run command that runs the generator taking the command line argument:
plugins {
id "application"
id "scala"
}
dependencies { compile "org.scala-lang:scala-library:2.12.3" }
mainClassName = "Main"
ext { cmdlineargs = "" }
run { args cmdlineargs }
The code generator is to be called from projectB (and an analogous projectC, and many others). I am trying to do this as follows (projectB/build.gradle):
task TEST {
project (":Generator").ext.cmdlineargs = "Hurray!"
println ("Value set:" + project(":Generator").ext.cmdlineargs )
dependsOn (":Generator:run")
}
Whatever I try to do (a gradle newbie here) I am not getting what I need. I have two problems:
The property cmdlineargs is not set at the point that task :projectB:TEST is run. The println sees the right value but the argument passed to the executed main method is the one configured in Generator/build.gradle, not the one in projectB/build.gradle. As pointed out in responses this can be work around using lazy property evaluation, but this does not solve the second problem.
The generator is only run once, even if I build both projectB and projectC. I need to run Generator:run for each of projectB and projectC separately (to generate different sources for each dependent project).
How can I get this to work? I suppose a completely different strategy is needed. I don't have to use command line and run; I can also try to run the main class of the generator more directly and pass arguments to it, but I do find the run task quite convenient (the complex classpath is set up automatically, etc.). The generator is a Java/Scala project itself that is compiled within the same multi-project build.
Note: tasks aren't like methods in java. A task will execute either 0 or 1 times per gradle invocation. A task will never execute twice (or more) in a single Gradle invocation
I think you want two or more tasks. Eg:
task run1(type:xxx) {
args 'foo'
}
task run2(type:xxx) {
args 'bar'
}
Then you can depend on run1 or run2 in your other projects.
I have a multi-project gradle build with an ant build script that contains a task such as this (simplified):
<target name="get-version">
<!-- Goes out and fetches the versioning for each project and sets prop -->
<property name="version" value="${myDesiredVersion}" />
</target>
and inside my build.gradle script I have an ant script loader and then I depend on this target; my issue is that this isn't being evaluated in a way that allows me to use my ant.properties['version'] in vendor.gradle like
// version = '1.0.2' -- works
version = ant.properties['version'] // doesn't work
I'm a gradle noobie and to top it off I'm migrating an ant project to start using gradle so I could be way off course. It's important to note that I can't just outright include the version in the vendor.gradle file since it's being generated by the ant-script.
I'm not familiar with how I could insert this ahead of the gradle lifecycle... I tried something like this
gradle.beforeProject { p ->
tasks['get-version'].execute() // appears to execute successfully?
configure(p) {
def vendorSettings = file("${myRoot}/vendor.gradle")
if(vendorSettings.exists()){
println "Loading vendor settings for project " + p
println ant.properties['version'] // but outputs null here
// ant.properties is still a valid observable map
apply from: vendorSettings
}
}
}
and the ant version property was still null - note that it works outside of this, I think the scoping is a little different then I think it is in this specific situation
You might have something like
task antTask {
//...
doLast {
file("vendor.properties").withInputStream { is ->
Properties props = new Properties()
props.load(is)
props.each { prop -> ext.set(prop.key, prop.value) }
}
}
}
And after the task is executed you could access properties like ext.version, etc.
But, this won't work if you want to use the properties in task configurations, because all the tasks are configured first, only after that are executed if necessary. So your antTask is running only after all other tasks are already configured. So you probably need to rethink how you generate these ant properties and either precompute them before running gradle, or port the logic to gradle build.
I am struggling with the Gradle build lifecycle; specifically with the split between the configuration and execution phases. I have read a number of sections in the Gradle manual and have seen a number of ideas online, but have not found a solution to the following problem:
I want to run a specific task to produce an artifact at the end of my java-library-distribution build that is a flattened version of the runtime configuration jars. That is, I only want to produce the artifact when I run the specific task to create the artifact.
I have created the following task:
task packageSamplerTask(type: Tar, dependsOn: distTar) {
description "Packages the build jars including dependencies as a flattened tar file. Artifact: ${distsDir}/${archivesBaseName}-${version}.tar"
from tarTree("${distsDir}/${archivesBaseName}-${version}.tar").files
classifier = 'dist'
into "${distsDir}/${archivesBaseName}-dist-${version}.tar"
}
Although this task does produce the required artifact, the task runs during gradle's configuration phase. This behavior has the following consequences:
Irrespective of which task I run from the command line, this packageSamplerTask task is always run, often unnecessarily; and
If I clean the project, then the build fails on the next run because $distsDir doesn't exist during the configuration phase (obviously).
It appears that if I extend the Copy task in this manner I'm always going to get this kind of premature behavior.
Is there a way to use the << closure / doLast declarations to get what I want? Or is there something else I'm missing / should be doing?
Update
After further work I have clarified my requirements, and resolved my question as follows (specifically):
"I want to package my code and my code's dependencies as a flat archive of jars that can be deployed as a jMeter plugin. The package can then be installed by unpacking into the jMeter lib/ext directory, as is. The package, therefore, must not include the jMeter jars (and their dependencies) which are used for building and testing"
Because Gradle doesn't appear to support the Maven-like provided dependency management, I created a new configuration for my package which excludes the jMeter jars.
configurations {
jmpackage {
extendsFrom runtime
exclude group: 'org.apache.jmeter', name: 'ApacheJMeter_core', version: '2.11'
exclude group: 'org.apache.jmeter', name: 'ApacheJMeter_java', version: '2.11'
}
}
And then created the following task (using the closure recommendation from Peter Niederwieser):
task packageSamplerTask(type: Tar, dependsOn: assemble) {
from { libsDir }
from { configurations.jmpackage.getAsFileTree() }
classifier = 'dist'
}
This solution appears to work, and it allows me to use just theGradle java plugin, too.
The task declaration is fine, but the flattening needs to be deferred too:
...
from { tarTree("${distsDir}/${archivesBaseName}-${version}.tar").files }
Also, the Tar file should be referred to in a more abstract way. For example:
from { tarTree(distTar.archivePath).files }
First your task isn't executed in the configuration phase but like EVERY task it is configured in that phase. And your closure is just a configuration of your task (a Configuration closure, not an Action closure). That is why your code is "executed" in the configuration phase".
If you want your code to be executed in the execution phase have to write it in a doLastclosure or doFirst. But in your case it is better to keep it in a configuration closure, because you are configuring your task.
To make sure your build doesn't fail because of the missing folder, you can create it with distsDir.mkdirs().
I am trying out the new Sonar Runner task recently released in gradle 1.5. What I would like to do is be able to make the sonar runner task dependent on another task so that I can set the Sonar properties correctly for this project (i.e. sonar.sources, sonar.binaries, sonar.libraries, sonar.java.source, sonar.java.target).
Specifically I am using an osgi build tool called bnd which will provide these values when an ant init task is executed (note that whilst I include the default bnd build.xml file, my complete build is really being done using gradle).
I thought I would be able to customize the sonar runner task by doing this (this is a multi-module build):
subprojects {
sonarRunner.dependsOn init
}
Eventually adding something like this (from what I understand of the bnd ant variables):
subprojects {
sonarRunner {
sonarProperties {
property "sonar.java.source", ant.property["project.sourcepath"]
property "sonar.java.target", ant.property["project.output"]
property "sonar.sources", ant.property["project.allsourcepath"]
property "sonar.libraries", ant.property["project.buildpath"]
}
}
sonarRunner.dependsOn init
}
Unfortunately when I try to add the dependsOn I get the error:
* What went wrong:
A problem occurred evaluating root project 'myproject'.
> Could not find property 'init' on project ':com.company.myproject.mymodule'.
If I try to make sonarRunner depend on a gradle task I get the following error:
* What went wrong:
A problem occurred evaluating root project 'myproject'.
> Could not find method dependsOn() for arguments [task ':gradletask'] on org.gradle.api.sonar.runner.SonarRunnerExtension_Decorated#c4d7c0c.
Am I missing something obvious here? If someone could point me in the right direction it would be a big help.
Your problem with not being able to call dependsOn() on sonarRunner task comes from the fact that the plugin defines both both sonarRunner extension and a sonarRunner task. It looks like extensions take precedence over tasks when objects are resolved by name in a gradle build file, hence your stacktrace points out that you are trying to call dependsOn() on an instance of org.gradle.api.sonar.runner.SonarRunnerExtension_Decorated instead of caling it on a SonarRunner task instance.
I think that if you retrieved the task from the task container explicitly you should be ok:
tasks.sonarRunner.dependsOn init
The root project gradle file is evaluated before the child project gradle files, that means init does not exist on the location you try to address it.
A workaround if you want to declare dependencies in the root project is to use afterEvaluate as described in http://www.gradle.org/docs/current/userguide/build_lifecycle.html, try:
subprojects {
afterEvaluate{
sonarRunner.dependsOn init
}
}
Another solution would be to add the dependency in the sub projects, directly or by applying another root gradle file.
apply from: '../sonardependency.gradle'
If anyone is interested, this is one way of getting the bnd information to be set correctly in Sonar for each subproject (I am sure there are better ways):
subprojects {
afterEvaluate {
sonarRunner {
sonarProperties {
ant.taskdef(resource:"aQute/bnd/ant/taskdef.properties",
classpath: "../cnf/plugins/biz.aQute.bnd/biz.aQute.bnd-2.0.0.jar");
def projectDir = project.rootDir.toString() + "/" + project.name;
ant.bndprepare(basedir:projectDir,print:"false",top:null);
def binaries = ant.properties['project.buildpath'].split(':') as ArrayList;
binaries.remove(0);
def binariesString = binaries.join(',');
properties["sonar.java.source"] = ant.properties['javac.source'];
properties["sonar.java.target"] = ant.properties['javac.target'];
properties["sonar.binaries"] = ant.properties['project.output'].replace(':',',');
properties["sonar.sources"] = ant.properties['project.sourcepath'].replace(':',',');
properties["sonar.libraries"] = binariesString;
}
}
}
}