I got an error using this build.grafle file and don't know how to fix it - gradle

Question

Here's the Error:
FAILURE: Build failed with an exception.
Where: Build file '/home/wieland/GitGradlePackaging/build.gradle' line: 22
What went wrong: A problem occurred evaluating root project 'GitGradlePackaging'.
Could not get unknown property 'org' for object of type org.gradle.api.internal.initialization.DefaultScriptHandler.
And Here's my build.gradle File:
/*
* This file was generated by the Gradle 'init' task.
*
* This generated file contains a sample Java project to get you started.
* For more details take a look at the Java Quickstart chapter in the Gradle
* user guide available at https://docs.gradle.org/4.6/userguide/tutorial_java_projects.html
*/
//From example: http://mrhaki.blogspot.co.at/2015/04/gradle-goodness-use-git-commit-id-in.html
buildscript {
repositories {
jcenter()
}
dependencies {
//Add dependencies for build script, so we can access Git from our build script
classpath 'org.ajoberstar:grgit:1.1.0'
}
def git = org.ajoberstar.grgit.Grgit.open(file('.'))
//To save Githash
def githash = git.head().abbreviatedId
}
plugins {
// Apply the java plugin to add support for Java
id 'java'
// Apply the application plugin to add support for building an application
id 'application'
// Apply the groovy plugin to also add support for Groovy (needed for Spock)
id 'groovy'
id 'distribution'
}
// Set version
project.version = mainProjectVersion + " - " + githash
project.ext.set("wholeVersion", "$project.version - $githash")
project.ext.set("buildtimestamp", "2000-01-01 00:00")
def versionfilename = "versioninfo.txt"
def GROUP_DEBUG = 'Debug'
// Task to print project infos
task debugInitialSettings {
group = GROUP_DEBUG
doLast {
println 'Version: ' + project.wholeVersion
println 'Timestamp: ' + project.buildtimestamp
println 'Filename: ' + project.name
}
}
// To add the githash to zip
task renameZip {
doLast {
new File ("$buildDir/distributions/$project.name-${project.version}.zip")
.renameTo ("$buildDir/distributions/$project.name-${project.wholeVersion}.zip")
}
}
distZip.finalizedBy renameZip
// To add the githash to tar
task renameTar{
doLast {
new File ("$buildDir/distributions/$project.name-${project.version}.tar")
.renameTo ("$buildDir/distributions/$project.name-${project.wholeVersion}.tar")
}
}
distTar.finalizedBy renameTar
// Define the main class for the application
mainClassName = 'App'
dependencies {
// This dependency is found on compile classpath of this component and consumers.
compile 'com.google.guava:guava:23.0'
// Use the latest Groovy version for Spock testing
testCompile 'org.codehaus.groovy:groovy-all:2.4.13'
// Use the awesome Spock testing and specification framework even with Java
testCompile 'org.spockframework:spock-core:1.0-groovy-2.4'
testCompile 'junit:junit:4.12'
}
// In this section you declare where to find the dependencies of your project
repositories {
// Use jcenter for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
jcenter()
}
//To generate Testreports as HTML
test {
reports {
junitXml.enabled = false
html.enabled = true
}
}
distributions {
main {
contents {
from { 'build/docs' }
into ('reports') {
from 'build/reports'
}
}
}
}
//To make sure that test and javadoc ran before zip and tar
distTar.dependsOn test
distZip.dependsOn test
distTar.dependsOn javadoc
distZip.dependsOn javadoc
Please keep in mind I have not much knowledge about gradle as I'm just starting to learn it!
Thanks in advance :)

Answer 1

You have to move the githash definition outside the buildscript block
buildscript {
repositories {
jcenter()
}
dependencies {
//Add dependencies for build script, so we can access Git from our build script
classpath 'org.ajoberstar:grgit:1.1.0'
}
}
def git = org.ajoberstar.grgit.Grgit.open(file('.'))
//To save Githash
def githash = git.head().abbreviatedId
The reason is that when the buildscript block is evaluated line by line, its dependencies are not yet loaded. When the rest of the script is evaluated, the dependencies of the buildscript block have already been loaded. This is actually the reason for the buildscript block existence: to be run before the rest of the build and prepare the setup.