Follow seed4j Main Branch with the CLI

Updated 5 November 2026 · Standard formula, shown below

Use the seed4j CLI to generate a project from the latest available seed4j main-branch code rather than relying on a previously released version. This is useful when you need to try unreleased changes or check a fix before it reaches a release. You will need the CLI, a working Java development environment, and access to the seed4j source repository; exact command options can vary by CLI version.

What You’ll Need

A terminal or command prompt and the seed4j CLI installed and available on your PATH.
A supported Java runtime for the CLI and for the project you intend to generate. Check the seed4j documentation for the requirements of your CLI version.
Network access to the seed4j source repository, typically hosted on GitHub, unless you have already cloned it locally.
A clean destination directory for the generated project. Following main may produce experimental or changing output, so avoid overwriting a project you depend on.
Git, if you plan to inspect the repository, switch branches, or compare changes locally.

Step-by-Step

Check that the CLI works. Open a terminal and run the CLI’s help or version command, following the syntax shown by its installation instructions. Confirm that the command is found and that Java is available. If the CLI cannot start, fix that first rather than debugging branch selection and project generation at the same time.
Read the CLI’s current help. Run its top-level help command, then inspect the help for the project-generation command. Look for an option to choose a source branch, reference, or repository URL. Do not assume that an option shown in an older guide still exists: CLI releases can change argument names and defaults.
Identify the seed4j repository and branch reference. Use the repository URL and branch name documented by the seed4j project. The branch is commonly named main, but verify the spelling and capitalization in the repository itself. A branch name is not the same as the CLI’s own version: you are asking the CLI to use a particular source reference for the seed.
Choose a branch-selection method supported by your CLI. If the generation command has a documented branch or reference option, use it and supply main. If it accepts a repository URL with a reference, use the documented format. Some CLI versions may not expose branch selection during generation; in that case, follow the project’s documented method for pointing the CLI at a local checkout or custom seed source. Do not invent a flag or assume that passing main as a positional argument will work.
Generate into a new directory. Use the documented project-generation command and provide the required project settings and destination. Select the seed4j main reference using the option or source configuration you verified in the previous steps. Keep the destination empty or nonexistent where possible, and review any prompts before accepting values. If the command offers a dry run or prints the selected source, use that information to confirm it is targeting the intended branch.
Check which source was used. Read the CLI output for the repository, reference, or commit details. If it does not show them, inspect the generated project’s configuration, metadata, or Git history for a recorded source revision. When certainty matters, compare the source commit with the current commit on the repository’s main branch; a branch can move between the time the CLI fetches it and the time you check.
Build and inspect the generated project. Follow the generated project’s README for its build and test commands. Confirm that generation completed without errors, then review the files and any warnings. Main-branch changes can be incomplete or incompatible with released CLI behavior, so treat the result as a development build rather than a stable release.
Repeat deliberately to pick up later changes. A generated project is a snapshot; it does not keep following the branch automatically. To try a newer main commit, generate another project using the same documented method, or update your local seed checkout and regenerate as the project supports. Compare the results and preserve your own work before applying changes.

Common Mistakes

Confusing the CLI version with the seed branch. Installing the newest CLI does not necessarily mean it will fetch seed4j main. Confirm both the CLI version and the source reference selected for generation.
Using an unsupported flag. Commands copied from another release may fail or be ignored. Check the installed CLI’s help and the matching documentation before running a command.
Assuming a generated project tracks main. Generation normally copies a point-in-time version. Updates to the repository do not automatically alter existing files.
Generating over existing work. A destination collision can fail, mix files, or risk overwriting changes. Use a separate directory and back up important work.
Expecting main to be stable. Main can contain changes that are unfinished or later revised. Do not use it as a production baseline without reviewing and validating the output.
Ignoring the Java and build requirements. The CLI may run successfully while the generated project fails to build under an incompatible Java version. Check the project’s own requirements, not just the CLI’s.

Tips

Record the CLI version, repository URL, branch, and commit hash alongside your test notes. A commit hash is more precise than “main,” because the branch name moves.
Use a disposable directory or a fresh Git working tree when evaluating unreleased changes. This makes it easier to compare generated output and discard a test safely.
If you need to reproduce a result, pin the source to a specific commit or tag where the CLI and project documentation support it, rather than fetching the moving main branch each time.
Keep your CLI installation instructions and seed4j documentation open while following the process. Repository layout and supported generation options may change.
Separate source-selection problems from build problems: first verify that the intended seed was fetched, then diagnose compilation or test failures in the generated project.

Troubleshooting

The CLI command is not found: Confirm installation completed and that its executable directory is on your PATH. Open a new terminal after changing PATH, then retry the documented help command. Also verify that you installed the CLI for your operating system and shell.

The CLI cannot start or reports a Java problem: Check the Java version required by the installed CLI and make sure the terminal can locate it. If the generated project has a different Java requirement, satisfy that separately; a runtime suitable for the CLI may not be sufficient for the project build.

The branch option is rejected: Recheck the generation command’s help for your installed version. Confirm the option spelling, whether it expects a branch name or full repository reference, and whether that CLI supports custom sources at all. If it does not, use the documented local-checkout or upgrade path rather than guessing flags.

Fetching main fails: Check your network connection and whether the repository URL is correct and publicly accessible. If you use a proxy or restricted network, verify that Git or the CLI is permitted to reach the host. Try inspecting the repository in a browser or with Git to distinguish a connectivity issue from a CLI configuration issue.

The generated project looks like an older version: Check the command output and metadata for the selected reference and commit. The CLI may have used its default released seed, or a local checkout may not have been updated. Fetch the latest repository data using the documented workflow, then generate again in a new directory.

Generation succeeds but the build fails: Follow the generated project’s README, check its required Java and build-tool versions, and read the first meaningful error in the build output. If the failure is specific to main, compare against a stable release and report reproducible details to the project’s maintainers.

Frequently Asked Questions

Does following main update a project I already generated?
No. Generation usually creates a snapshot. You must use the project’s supported update or regeneration process to incorporate later changes, and review the resulting differences.

Does the seed4j CLI always use the main branch by default?
Do not assume so. The default depends on the CLI version and its configuration. Check the command output, help, or documentation to confirm the selected source.

Can I specify a particular main-branch commit?
Use a commit reference only if your CLI’s documented source syntax supports it. Pinning a commit is a reliable way to reproduce a test; otherwise, record the commit that was fetched.

Is main safe for a production project?
Main may include unreleased or changing work. Review the generated code, run the project’s tests, and use a stable release for production unless you have deliberately assessed the risks.

Why is the generated output different from a tutorial?
The tutorial may target another CLI version or an earlier commit. Compare the CLI version and seed commit, then use documentation that matches your installed version.

Do I need to clone the repository first?
Not necessarily. Some CLI versions fetch a remote source directly; others may require a local checkout for custom references. Follow the method supported by your installed CLI.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.