Gradle build using plugins and dependencies from "flatDir" - gradle

Question

How to make a Gradle build if all the required jars to build the project (plugins+dependencies) are present in flatDir?
I have all the required jars in my D drive under D:/path/to/local/directory. Now when I am trying to do a Gradle build, it fails every time for different reasons. Need help in fixing the same (Gradle version 6.3).
Code in my build.gradle:
buildscript {
repositories {
// If you want to use a (flat) filesystem directory as a repository
flatDir {
dirs 'D:/path/to/local/directory'
}
}
}
plugins {
id "jacoco"
id 'org.springframework.boot' version '2.2.6.RELEASE'
id 'io.spring.dependency-management' version '1.0.9.RELEASE'
id 'java'
id 'war'
id "org.sonarqube" version "2.8"
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.springframework.boot:spring-boot-starter-web-services'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'wsdl4j:wsdl4j:1.6.3'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testImplementation 'org.springframework.ws:spring-ws-test'
testImplementation 'org.apache.httpcomponents:httpclient:4.5.9'
testImplementation 'com.h2database:h2:1.4.199'
}
bootWar {
baseName = 'web-service'
version = '1.0.0'
}
jacocoTestReport {
reports {
xml.enabled true
}
}
sonarqube {
properties {
property 'sonar.projectName', 'Sonar-Gradle-Integration'
}
}
Code in my settings.gradle:
pluginManagement {
flatDir {
dirs 'D:/path/to/local/directory'
}
}

Answer 1

I found out how to build a project from flat directory after some tries (Gradle 6.3).
You must have all the dependencies in the flatDir repository (transitive dependencies as well). I kept all the jars in a single directory inside the root folder named "lib" of my project and modified the build.gradle and settings.gradle like below.
build.gradle:
plugins {
id "org.sonarqube"
id "jacoco"
id 'java'
id 'war'
}
group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
repositories {
// If you want to use a (flat) filesystem directory as a repository
flatDir {
dirs 'lib'
}
}
dependencies {
implementation fileTree(dir: 'lib', include: '*.jar')
testImplementation fileTree(dir: 'lib', include: '*.jar')
}
jacocoTestReport {
reports {
xml.enabled true
}
}
settings.gradle
pluginManagement {
buildscript {
repositories {
flatDir {
dirs 'lib'
}
}
dependencies {
classpath fileTree(dir: 'lib', include: '*.jar')
}
}
}
rootProject.name = 'gradleproj'