mavencentral-cli

mavencentral

A command line for Maven Central.

mavencentral is a single pure-Go binary. It reads public mavencentral data over plain HTTPS, shapes it into clean records, and prints output that pipes into the rest of your tools. No API key, nothing to run alongside it.

The same package is also a resource-URI driver, so a host program like ant can address mavencentral as mavencentral:// URIs.

Install

go install github.com/tamnd/mavencentral-cli/cmd/mavencentral@latest

Or grab a prebuilt binary from the releases, or run the container image:

docker run --rm ghcr.io/tamnd/mavencentral:latest --help

Usage

# Search for artifacts by keyword
mavencentral search spring-core
mavencentral search guava -o json
mavencentral search log4j -n 5

# List all versions of a specific artifact
mavencentral versions com.google.guava guava
mavencentral versions org.springframework spring-core -n 10 -o json

mavencentral --help                           # the whole command tree

Every command shares one output contract: -o table|markdown|json|jsonl|csv|tsv|url|raw, --fields to pick columns, --template for a custom line, and -n to limit. The default adapts to where output goes (a color-aware table on a terminal, JSONL in a pipe), so the same command reads well by hand and parses cleanly downstream.

Serve it

The same operations are available over HTTP and as an MCP tool set for agents, with no extra code:

mavencentral serve --addr :7777    # GET /v1/page/<path>  returns NDJSON
mavencentral mcp                   # speak MCP over stdio

Use it as a resource-URI driver

mavencentral registers a mavencentral domain the way a program registers a database driver with database/sql. A host enables it with one blank import:

import _ "github.com/tamnd/mavencentral-cli/mavencentral"

Then ant (or any program that links the package) dereferences mavencentral:// URIs without knowing anything about mavencentral:

ant get mavencentral://artifact/com.google.guava:guava   # resolve the URL
ant url mavencentral://artifact/com.google.guava:guava   # the live https URL

Development

cmd/mavencentral/   thin main: hands cli.NewApp to kit.Run
cli/                 assembles the kit App from the mavencentral domain
mavencentral/                the library: HTTP client, data models, and domain.go (the driver)
docs/                tago documentation site

make build      # ./bin/mavencentral
make test       # go test ./...
make vet        # go vet ./...

Releasing

Push a version tag and GitHub Actions runs GoReleaser, which builds the archives, Linux packages, the multi-arch GHCR image, checksums, SBOMs, and a cosign signature:

git tag v0.1.0
git push --tags

The Homebrew and Scoop steps self-disable until their tokens exist, so the first release works with no extra secrets.

License

Apache-2.0. See LICENSE.