nasacmr-cli

nasacmr

A command line for the NASA Common Metadata Repository (CMR).

nasacmr is a single pure-Go binary. It searches and lists Earth science data indexed by NASA — over 54,000 collections and millions of granules — over plain HTTPS, shapes it into clean records, and prints output that pipes into the rest of your tools. No API key required.

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

Install

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

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

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

Usage

nasacmr collections --keyword=landsat              # search collections
nasacmr collections --provider=LAADS               # by data provider
nasacmr collections --keyword=climate -o json      # as JSON, ready for jq
nasacmr granules --short-name=HLSL30               # list granules
nasacmr granules --short-name=HLSL30 --temporal=2024-01-01T00:00:00Z,2024-01-31T23:59:59Z
nasacmr search --keyword=climate                   # full-text search
nasacmr --help                                     # the whole command tree

Every command shares one output contract: -o table|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 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:

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

Use it as a resource-URI driver

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

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

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

ant get nasacmr://collection/C2021957657-LPCLOUD   # fetch a collection record
ant cat nasacmr://collection/C2021957657-LPCLOUD   # just the abstract
ant url nasacmr://collection/C2021957657-LPCLOUD   # the live CMR URL

Development

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

make build      # ./bin/nasacmr
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.