Gradle Goodness: Using and Working with Gradle Version
To get the current Gradle version we can use the gradleVersion
property of the Gradle
object. This returns a string value we can use for displaying the values. If we want to compare Gradle versions we can use the GradleVersion
object. With this class we can get the current version, but we can also compare Gradle versions. This can be useful in our build scripts if we have functionality based on a Gradle version.
In the following build file we first have a task that uses the gradleVersion
of Gradle
. Then inside the task we use the static method current
of the GradleVersion
class. We get an GradleVersion
instance and we display different properties from this instance. In the task compareGradleVersion
we create a GradleVersion
instance with the static version
method. We compare multiple GradleVersion
objects and have different functionality based on the Gradle version.
00.
task printGradleVersion << {
01.
// Get current Gradle version as object.
02.
final GradleVersion gradleVersion = GradleVersion.current()
03.
04.
// Print different properties.
05.
println
"Your Gradle version is ${gradleVersion.version}"
06.
println
"Base version: ${gradleVersion.baseVersion}"
07.
println
"Build time : ${gradleVersion.buildTime}"
08.
println
"Build number: ${gradleVersion.buildNumber}"
09.
println
"Commit id : ${gradleVersion.revision}"
10.
println
"Next major : ${gradleVersion.nextMajor}"
11.
println
"Snapshot? : ${gradleVersion.snapshot}"
12.
}
13.
14.
task compareGradleVersion << {
15.
// Current Gradle version.
16.
final GradleVersion gradleVersion = GradleVersion.current()
17.
18.
// Gradle version 2.1 as GradleVersion object.
19.
final GradleVersion gradle2_1 = GradleVersion.version(
'2.1'
)
20.
21.
// Compare versions.
22.
if
(gradleVersion > gradle2_1) {
23.
println
"Your Gradle version is newer than 2.1"
24.
}
else
if
(gradleVersion == gradle2_1) {
25.
println
"Your Gradle version is 2.1"
26.
}
else
{
27.
println
"Your Gradle version is older than 2.1"
28.
}
29.
}
When we run the tasks we get the following output:
$ gradle -q printGradleVersion
Gradle version is 2.2
Your Gradle version is 2.2
Base version: Gradle 2.2
Build time : 2014-11-10 13:31:44 UTC
Build number: none
Commit id : aab8521f1fd9a3484cac18123a72bcfdeb7006ec
Next major : Gradle 3.0
Snapshot? : false
$ gradle -q compareGradleVersion
Your Gradle version is newer than 2.1
$
Thanks to John Engelman who showed me this class on a pull request for the Gradle Grails plugin.
Written with Gradle 2.2.
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