Read versionName from build.gradle in bash

问题:

Is there a way to read the value versionName from the build.gradle file of an Android project to use it in bash?

More precisely: How can I read this value from the file and use it in a Travis-CI script? I'll use it like

# ANDROID_VERSION=???
export GIT_TAG=build-$ANDROID_VERSION

I set up a Travis-CI like described in this post https://stackoverflow.com/a/28230711/1700776.

My build.gradle: http://pastebin.com/uiJ0LCSk

回答1:

Expanding on Khozzy's answer, to retrieve versionName of your Android package from the build.gradle, add this custom task:

task printVersionName {
    doLast {
        println android.defaultConfig.versionName
    }
}

and invoke it so:

gradle -q printVersionName

回答2:

You can define a custom task, i.e.

task printVersion {
    doLast {
        println project.version
    }
}

And execute it in Bash:

$ gradle -q pV
1.8.5

回答3:

Thanks to alnet's comment I came up with this solution (note Doug Stevenson's objection):

# variables
export GRADLE_PATH=./app/build.gradle   # path to the gradle file
export GRADLE_FIELD="versionName"   # field name
# logic
export VERSION_TMP=$(grep $GRADLE_FIELD $GRADLE_PATH | awk '{print $2}')    # get value versionName"0.1.0"
export VERSION=$(echo $VERSION_TMP | sed -e 's/^"//'  -e 's/"$//')  # remove quotes 0.1.0
export GIT_TAG=$TRAVIS_BRANCH-$VERSION.$TRAVIS_BUILD_NUMBER
# result
echo gradle version: $VERSION
echo release tag: $GIT_TAG

回答4:

How about this?

grep -o "versionCode\s\+\d\+" app/build.gradle | awk '{ print $2 }'

The -o option makes grep only print the matching part so you're guaranteed that what you pass to awk is only the pattern versionCode NUMBER.

回答5:

eg

android{
  android.applicationVariants.all { variant ->
    variant.outputs.each { output ->
        def outputFile = output.outputFile
        def fileName
        if (outputFile != null && outputFile.name.endsWith('.apk')) {
            if (!outputFile.name.contains('unaligned')) {
                fileName = "yourAppRootName_${variant.productFlavors[0].name}_${getVersionName()}_${variant.buildType.name}.apk"
                output.outputFile = new File(outputFile.parent + "/aligned", fileName)
            }
        }
    }
}
}

use ${getVersionName()} to get version in build.gradle

回答6:

If you are seeking a migrated version for Kotlin DSL, here is with what I came up:

tasks.create("printVersionName") {
    doLast { println(version) }
}

回答7:

If you have multiple flavors and set the version information in the flavor, you can use something like this:

task printVersion{
doLast {
    android.productFlavors.all {
        flavor ->
            if (flavorName.matches(flavor.name)) {
                print flavor.versionName + "-" + flavor.versionCode
            }
    }
}
}

You can then call it using

./gradlew -q printVersion -PflavorName=MyFlavor