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The dependency-submission action

The gradle/actions/dependency-submission action provides the simplest (and recommended) way to generate a dependency graph for your project. This action will attempt to detect all dependencies used by your build without building and testing the project itself.

The dependency graph snapshot is generated via integration with the GitHub Dependency Graph Gradle Plugin, and submitted to your repository via the GitHub Dependency Submission API. The generated snapshot files can be submitted in the same job, or saved for submission in a subsequent job.

The generated dependency graph includes all of the dependencies in your build, and is used by GitHub to generate Dependabot Alerts for vulnerable dependencies, as well as to populate the Dependency Graph insights view.

If you're confused by the behaviour you're seeing or have specific questions, please check out the FAQ before raising an issue.

General usage

The following workflow will generate a dependency graph for a Gradle project and submit it immediately to the repository via the Dependency Submission API. For most projects, this default configuration should be all that you need.

Simply add this as a new workflow file to your repository (eg .github/workflows/dependency-submission.yml).

name: Dependency Submission

on:
  push:
    branches: [ 'main' ]

permissions:
  contents: write

jobs:
  dependency-submission:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: actions/setup-java@v4
      with:
        distribution: temurin
        java-version: 17

    - name: Generate and submit dependency graph
      uses: gradle/actions/dependency-submission@v3

Gradle execution

To generate a dependency graph, the dependency-submission action must perform a Gradle execution that resolves the dependencies of the project. All dependencies that are resolved in this execution will be included in the generated dependency graph. By default action executes a built-in task that is designed to resolve all build dependencies (:ForceDependencyResolutionPlugin_resolveAllDependencies).

The action looks for a Gradle project in the root of the workspace, and executes this project with the Gradle wrapper, if configured for the project. If the wrapper is not configured, whatever gradle available on the command-line will be used.

The action provides the ability to override the Gradle version and task to execute, as well as provide additional arguments that will be passed to Gradle on the command-line. See Configuration Parameters below.

Publishing a Develocity Build Scan® from your dependency submission workflow

You can automatically publish a free Develocity Build Scan on every run of gradle/actions/dependency-submission. Three input parameters are required, one to enable publishing and two more to accept the Develocity terms of use.

    - name: Generate and submit dependency graph
      uses: gradle/actions/dependency-submission@v3
      with:
        build-scan-publish: true
        build-scan-terms-of-use-url: "https://gradle.com/help/legal-terms-of-use"
        build-scan-terms-of-use-agree: "yes"

A Build Scan makes it easy to determine the source of any dependency vulnerabilities in your project.

Configuration parameters

In some cases, the default action configuration will not be sufficient, and additional action parameters will need to be specified.

    - name: Generate and save dependency graph
      uses: gradle/actions/dependency-submission@v3
      with:
        # Use a particular Gradle version instead of the configured wrapper.
        gradle-version: 8.6

        # The gradle project is not in the root of the repository.
        build-root-directory: my-gradle-project

        # Choose a task that will trigger dependency resolution
        dependency-resolution-task: myDependencyResolutionTask

        # Additional arguments that should be passed to execute Gradle
        additional-arguments: --no-configuration-cache

        # Enable configuration-cache reuse for this build.
        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}

        # Do not attempt to submit the dependency-graph. Save it as a workflow artifact.
        dependency-graph: generate-and-upload

        # Specify the location where dependency graph files will be generated.
        dependency-graph-report-dir: custom-report-dir

        # By default, failure to generate a dependency graph will cause the workflow to fail
        dependency-graph-continue-on-failure: true

See the Action Metadata file for a more detailed description of each input parameter.

The GitHub Dependency Graph Gradle Plugin can be further configured via a number of environment variables. These will be automatically set by the dependency-submission action, but you may override these values by setting them explicitly in your workflow file.

Resolving a dependency vulnerability

Finding the source of a dependency vulnerability

Once you have submitted a dependency graph, you may receive Dependabot Alerts warning about vulnerabilities in dependencies of your project. In the case of transitive dependencies, it may not be obvious how that dependency is used or what you can do to address the vulnerability alert.

The first step to investigating a Dependabot Alert is to determine the source of the dependency. One of the best ways to do so is with a free Develocity Build Scan®, which makes it easy to explore the dependencies resolved in your build.

image

In this example, we are searching for dependencies matching the name 'com.squareup.okio:okio' in the Build Dependencies of the project. You can easily see that this dependency originates from 'com.github.ben-manes:gradle-versions-plugin'. Knowing the source of the dependency can help determine how to deal with the Dependabot Alert.

Note that you may need to look at both the Dependencies and the Build Dependencies of your project to find the offending dependency.

When you cannot publish a Build Scan®

If publishing a free Build Scan to https://scans.gradle.com isn't an option, and you don't have access to a private Develocity server for your project, you can obtain information about the each resolved dependency by running the dependency-submission workflow with debug logging enabled.

The simplest way to do so is to re-run the dependency-submission job with debug logging enabled:

image

When you do so, the Gradle build that generates the dependency-graph will include a log message for each dependency version included in the graph. Given the details in one log message, you can run (locally) the built-in dependencyInsight task to determine exactly how the dependency was resolved.

For example, given the following message in the logs:

Detected dependency 'com.google.guava:guava:32.1.3-jre': project = ':my-subproject', configuration = 'compileClasspath'

You would run the following command locally:

./gradlew :my-subproject:dependencyInsight --configuration compileClasspath --dependency com.google.guava:guava:32.1.3-jre

Dealing with 'classpath' configuration

If the configuration value in the log message is "classpath" then instead of running dependency-insight you'll need to run the Gradle buildEnvironment task.

For example, given the following message in the logs:

Detected dependency 'xerces:xercesImpl:2.12.2': project = ':my-subproject', configuration = 'classpath'

You would run the following command locally to expose the xercesImpl dependency:

./gradlew :my-subproject:buildEnvironment | grep -C 5 xercesImpl

Updating the dependency version

Once you've discovered the source of the dependency, the most obvious fix is to update the dependency to a patched version that does not suffer the vulnerability. For direct dependencies, this is often straightforward. But for transitive dependencies it can be tricky.

Dependency source is specified directly in the build

If the dependency is used to compile your code or run your tests, it's normal for the underlying "source" of the dependency to have a version configured directly in the build. For example, if you have a vulnerable version of com.squareup.okio:okio in your compileClasspath, then it's likely you have a dependency like com.squareup.moshi:moshi configured as an api or implementation dependency.

In this case there are 2 possibilities:

  1. There is a newer, compatible version of com.squareup.moshi:moshi available, and you can just bump the version number.
  2. There isn't a newer, compatible version of com.squareup.moshi:moshi

In the second case, you can add a Dependency Constraint, to force the use of the newest version of com.squareup.okio:

dependencies {
  implementation("com.squareup.moshi:moshi:1.12.0")
  constraints {
    // Force a newer version of okio in transitive resolution
    implementation("com.squareup.okio:okio:3.6.0")
  }
}

Dependency source is a plugin classpath

If the vulnerable dependency is introduced by a Gradle plugin, again the best option is to look for a newer version of the plugin. But if none is available, you can still use a dependency constraint to force a newer transitive version to be used.

The dependency constraint must be added to the classpath configuration of the buildscript that loads the plugin.

buildscript {
  repositories {
    gradlePluginPortal()
  }
  dependencies {
    constraints {
      // Force a newer version of okio in transitive resolution
      classpath("com.squareup.okio:okio:3.6.0")
    }
  }
}
plugins {
  id("com.github.ben-manes.versions") version("0.51.0")
}

Limiting the dependencies that appear in the dependency graph

By default, the dependency-submission action attempts to detect all dependencies declared and used by your Gradle build. At times it may helpful to limit the dependencies reported to GitHub, to avoid security alerts for dependencies that don't form a critical part of your product. For example, a vulnerability in the tool you use to generate documentation may not be as important as a vulnerability in one of your runtime dependencies.

The dependency-submission action provides a convenient mechanism to filter the projects and configurations that contribute to the dependency graph.

Note

Ideally, all dependencies involved in building and testing a project will be extracted and reported in a dependency graph. These dependencies would be assigned to different scopes (eg development, runtime, testing) and the GitHub UI would make it easy to opt-in to security alerts for different dependency scopes. However, this functionality does not yet exist.

Excluding certain Gradle projects from the dependency graph

If you do not want the dependency graph to include dependencies from every project in your build, you can easily exclude certain projects from the dependency extraction process.

To restrict which Gradle subprojects contribute to the report, specify which projects to exclude via a regular expression. You can provide this value via the DEPENDENCY_GRAPH_EXCLUDE_PROJECTS environment variable or system property.

Note that excluding a project in this way only removes dependencies that are resolved as part of that project, and may not necessarily remove all dependencies declared in that project. If another project depends on the excluded project then it may transitively resolve dependencies declared in the excluded project: these dependencies will still be included in the generated dependency graph.

Excluding certain Gradle configurations from the dependency graph

Similarly to Gradle projects, it is possible to exclude a set of configuration instances from dependency graph generation, so that dependencies resolved by those configurations are not included.

To restrict which Gradle configurations contribute to the report, specify which configurations to exclude via a regular expression. You can provide this value via the DEPENDENCY_GRAPH_EXCLUDE_CONFIGURATIONS environment variable or system property.

Note that configuration exclusion applies to the configuration in which the dependency is resolved which is not necessarily the configuration where the dependency is declared. For example if you decare a dependency as implementation in a Java project, that dependency will be resolved in compileClasspath, runtimeClasspath and possibly other configurations.

Example of project and configuration filtering

For example, if you want to exclude dependencies in the buildSrc project, and exclude dependencies from the testCompileClasspath and testRuntimeClasspath configurations, you would use the following configuration:

    - name: Generate and submit dependency graph
      uses: gradle/actions/dependency-submission@v3
      env:
        # Exclude all dependencies that originate solely in the 'buildSrc' project
        DEPENDENCY_GRAPH_EXCLUDE_PROJECTS: ':buildSrc'
        # Exclude dependencies that are only resolved in test classpaths
        DEPENDENCY_GRAPH_EXCLUDE_CONFIGURATIONS: '.*[Tt]est(Compile|Runtime)Classpath'

Other filtering options

The GitHub Dependency Graph Gradle Plugin has other filtering options that may be useful. See the docs for details.

Advance usage scenarios

Using a custom plugin repository

By default, the action downloads the github-dependency-graph-gradle-plugin from the Gradle Plugin Portal (https://plugins.gradle.org). If your GitHub Actions environment does not have access to this URL, you can specify a custom plugin repository to use with an environment variable.

See the setup-gradle docs for details.

Integrating the dependency-review-action

The GitHub dependency-review-action helps you understand dependency changes (and the security impact of these changes) for a pull request, by comparing the dependency graph for the pull-request with that of the HEAD commit.

Example of a pull request workflow that executes a build for a pull request and runs the dependency-review-action:

name: Dependency review for pull requests

on:
  pull_request:

permissions:
  contents: write

jobs:
  dependency-submission:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: actions/setup-java@v4
      with:
        distribution: temurin
        java-version: 17

    - name: Generate and submit dependency graph
      uses: gradle/actions/dependency-submission@v3

    - name: Perform dependency review
      uses: actions/dependency-review-action@v3

Usage with pull requests from public forked repositories

This contents: write permission is not available for any workflow that is triggered by a pull request submitted from a public forked repository. This limitation is designed to prevent a malicious pull request from effecting repository changes.

Because of this restriction, we require 2 separate workflows in order to generate and submit a dependency graph:

  1. The first workflow runs directly against the pull request sources and will generate-and-upload the dependency graph.
  2. The second workflow is triggered on workflow_run of the first workflow, and will download-and-submit the previously saved dependency graph.

Main workflow file

name: Generate and save dependency graph

on:
  pull_request:

permissions:
  contents: read # 'write' permission is not available

jobs:
  dependency-submission:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: actions/setup-java@v4
      with:
        distribution: temurin
        java-version: 17

    - name: Generate and save dependency graph
      uses: gradle/actions/dependency-submission@v3
      with:
        dependency-graph: generate-and-upload

Dependent workflow file

name: Download and submit dependency graph

on:
  workflow_run:
    workflows: ['Generate and save dependency graph']
    types: [completed]

permissions:
  actions: read
  contents: write

jobs:
  submit-dependency-graph:
    runs-on: ubuntu-latest
    steps:
    - name: Download and submit dependency graph
      uses: gradle/actions/dependency-submission@v3
      with:
        dependency-graph: download-and-submit # Download saved dependency-graph and submit

Integrating dependency-review-action for pull requests from public forked repositories

To integrate the dependency-review-action into the pull request workflows above, a third workflow file is required. This workflow will be triggered directly on pull_request, but will wait until the dependency graph results are submitted before the dependency review can complete. The period to wait is controlled by the retry-on-snapshot-warnings input parameters.

Here's an example of a separate "Dependency Review" workflow that will wait for 10 minutes for the above PR check workflow to complete.

name: dependency-review

on:
  pull_request:

permissions:
  contents: read

jobs:
  dependency-review:
    runs-on: ubuntu-latest
    steps:
    - name: 'Dependency Review'
      uses: actions/dependency-review-action@v3
      with:
        retry-on-snapshot-warnings: true
        retry-on-snapshot-warnings-timeout: 600

The retry-on-snapshot-warnings-timeout (in seconds) needs to be long enough to allow the entire Generate and save dependency graph and Download and submit dependency graph workflows (above) to complete.

Gradle version compatibility

Dependency-graph generation is compatible with most versions of Gradle >= 5.2, and is tested regularly against Gradle versions 5.2.1, 5.6.4, 6.0.1, 6.9.4, 7.1.1 and 7.6.3, as well as all patched versions of Gradle 8.x.

A known exception to this is that Gradle 7.0, 7.0.1 and 7.0.2 are not supported.

See here for complete compatibility information.

Additional references