
Question:
I have a task that updates my app's version code, called <em>changeVersionCode</em>. This task runs before my Android build tasks (<em>assembleRelease</em>), but obviously it happens after the android { }
closure. This seems to mean that versionCode is set and cannot be changed even when <em>changeVersionCode</em> runs.
Here's a simplified build script that demonstrates how I have tried to approach this problem:
// .version is a file that starts at "1" the first time I call this
def loadVersionCode() {
// fetch version code from a file, '.version'
return loadVersionCodeFromFile('.version')
}
def incrementVersionCode() {
// fetch version code, update it, and save it back to a file
def newVersion = loadVersionCode() + 1
saveVersionCodeToFile('.version', newVersion)
}
apply plugin: 'com.android.application'
android {
// ... snip ...
defaultConfig {
// Set the version code to contents of .version (eg. 1)
versionCode loadVersionCode()
// ...
}
}
task incrementVersionCode << {
println "Old version code: " + android.defaultConfig.versionCode // prints 1
incrementVersionCode()
def newVersion = loadVersion() // this now returns 2
android.defaultConfig.versionCode = loadVersionCode()
// Also tried:
// android.defaultConfig.versionCode loadVersionCode()
println "New version code: " + android.defaultConfig.versionCode // prints 2
// android.defaultConfig.versionCode is now 2, but APK still has version 1 (until next time I run gradle)
}
Then:
# Build an APK with versionCode 1
$ ./gradlew assembleRelease
# This seems to change versionCode to 2, but still builds an APK with versionCode 1
#
# Prints:
# Old version code: 1
# New version code: 2
$ ./gradlew incrementVersionCode assembleRelease
I am using:
<ul><li>Gradle 2.5</li> <li>Groovy 2.3.10</li> <li>Ant 1.9.3</li> <li>Java 1.8.0_45</li> <li>Mac OS X 10.10.5</li> <li>Android build tools 22.0.1</li> </ul>Is there any way I can change my version code from a task before invoking Android build tasks?
Answer1:<strong>How to configure versionCode before a task is launched</strong>
You can use the DSL tasks.whenTaskAdded
. You can read the <a href="https://docs.gradle.org/current/userguide/build_lifecycle.html" rel="nofollow">official doc</a>, chapter 58.6.2. Task creation.
You can receive a notification immediately after a task is added to a project. This can be used to set some default values or add behaviour <strong>before the task</strong> is made available in the build file.
</blockquote>You can define a task:
task incrementVersionCode << {
//do something
}
Then define the dependency :
tasks.whenTaskAdded { task ->
if (task.name == 'xxxxx') {
task.dependsOn incrementVersionCode
}
}
In your case you can do somenthing like this:
tasks.whenTaskAdded { task ->
if (task.name == 'generateReleaseBuildConfig' || task.name == 'generateDebugBuildConfig') {
task.dependsOn 'increaseVersionCode'
}
}
<strong>How to configure versionCode with a function</strong>
In the top-level file you can configure a function like this:
ext {
buildVersionCode = {
//...
}
}
In your module/build.gradle
you can do somehing like this:
defaultConfig {
versionCode buildVersionCode()
//....
}
Otherwise you can do in your build.gradle
something like:
defaultConfig {
//...
versionCode getMyNumber()
}
def getMyNumber() {
return //.... ;
}