Gradle - get URL of dependency artifact - gradle

Question

I want to download the dependency artifacts manually in the future after Gradle has all the dependency artifacts available, hence I would like to get the URLs which Gradle used to download those artifacts.
Is there a way to get the URL of dependencies which artifacts have been downloaded by Gradle?

Answer 1

use gson for a example:
dependencies {
// https://mvnrepository.com/artifact/com.google.code.gson/gson
compile 'com.google.code.gson:gson:2.8.6'
}
create a task to print url:
task getURLofDependencyArtifact() {
doFirst {
project.configurations.compile.dependencies.each { dependency ->
for (ArtifactRepository repository : project.repositories.asList()) {
def url = repository.properties.get('url')
//https://repo.maven.apache.org/maven2/com/google/code/gson/gson/2.8.6/gson-2.8.6.jar
def jarUrl = String.format("%s%s/%s/%s/%s-%s.jar", url.toString(),
dependency.group.replace('.', '/'), dependency.name, dependency.version,
dependency.name, dependency.version)
try {
def jarfile = new URL(jarUrl)
def inStream = jarfile.openStream();
if (inStream != null) {
println(String.format("%s:%s:%s", dependency.group, dependency.name, dependency.version)
+ " -> " + jarUrl)
return
}
} catch (Exception ignored) {
}
}
}
}
}
run ./gradlew getURLofDependencyArtifact
Task :getURLofDependencyArtifact
com.google.code.gson:gson:2.8.6 -> https://jcenter.bintray.com/com/google/code/gson/gson/2.8.6/gson-2.8.6.jar
PS:the result dependency your project's
repositories {
jcenter()
mavenCentral()
}
so, the result maybe:
Task :getURLofDependencyArtifact
com.google.code.gson:gson:2.8.6 -> https://repo.maven.apache.org/maven2/com/google/code/gson/gson/2.8.6/gson-2.8.6.jar

Answer 2

using Gradle version 6.0 or above, another way of outputting the URLs is to mix --refresh-dependencies with --info
// bash/terminal
./gradlew --info --refresh-dependencies
// cmd
gradlew --info --refresh-dependencies
or output to file
// bash/terminal
./gradlew --info --refresh-dependencies > urls.txt
// cmd
gradlew --info --refresh-dependencies > urls.txt
note on --refresh-dependencies
It’s a common misconception to think that using --refresh-dependencies
will force download of dependencies. This is not the case: Gradle will
only perform what is strictly required to refresh the dynamic
dependencies. This may involve downloading new listing or metadata
files, or even artifacts, but if nothing changed, the impact is
minimal.
source: https://docs.gradle.org/current/userguide/dependency_management.html
see also: How can I force gradle to redownload dependencies?

Answer 3

Wanted something similar but on Android and Kotlin DSL so based on #andforce's answer developed this which hopefully will be useful for others also,
import org.jetbrains.kotlin.utils.addToStdlib.firstNotNullResult
import java.net.URL
val dependenciesURLs: Sequence<Pair<String, URL?>>
get() = project.configurations.getByName(
"implementation"
).dependencies.asSequence().mapNotNull {
it.run { "$group:$name:$version" } to project.repositories.mapNotNull { repo ->
(repo as? UrlArtifactRepository)?.url
}.flatMap { repoUrl ->
"%s/%s/%s/%s/%s-%s".format(
repoUrl.toString().trimEnd('/'),
it.group?.replace('.', '/') ?: "", it.name, it.version,
it.name, it.version
).let { x -> listOf("$x.jar", "$x.aar") }
}.firstNotNullResult { url ->
runCatching {
val connection = URL(url).openConnection()
connection.getInputStream() ?: throw Exception()
connection.url
}.getOrNull()
}
}
tasks.register("printDependenciesURLs") {
doLast {
dependenciesURLs.forEach { (dependency: String, url: URL?) -> println("$dependency => $url") }
}
}
Update: It might not able to find indirect dependencies however.

Answer 4

We need to take care about aar also.
project.configurations.getByName(
"implementation"
).dependencies.each { dependency ->
for (ArtifactRepository repository : rootProject.repositories.asList()) {
def url = repository.properties.get('url')
def urlString = url.toString()
if (url.toString().endsWith("/")) {
urlString = url.toString()
} else {
urlString = url.toString() + "/"
}
def jarUrl = String.format("%s%s/%s/%s/%s-%s.jar", urlString,
dependency.group.replace('.', '/'), dependency.name, dependency.version,
dependency.name, dependency.version)
def aarUrl = String.format("%s%s/%s/%s/%s-%s.aar", urlString,
dependency.group.replace('.', '/'), dependency.name, dependency.version,
dependency.name, dependency.version)
try {
def jarfile = new URL(jarUrl)
def inStreamJar = jarfile.openStream();
if (inStreamJar != null) {
println(String.format("%s:%s:%s", dependency.group, dependency.name, dependency.version)
+ " -> " + jarUrl)
return
}
} catch (Exception ignored) {
}
try {
def aarfile = new URL(aarUrl).setURLStreamHandlerFactory()
def inStreamAar = aarfile.openStream();
if (inStreamAar != null) {
println(String.format("%s:%s:%s", dependency.group, dependency.name, dependency.version)
+ " -> " + aarUrl)
return
}
} catch (Exception ignored) {
}
}
}