fix(tools): migrate docker-compose to docker compose plugin

[rhanka]

What & why

PR #94 reverted an earlier docker compose migration back to docker-compose and re-added a sudo tee /usr/local/bin/docker-compose wrapper install inside the config target of packages/tools/Makefile. That sudo step blocks non-interactive make config on dev machines that don't already have a docker-compose binary.

This PR removes that dev-facing blocker and modernizes the two remaining laggards to the Docker CLI docker compose plugin. The root Makefile, deces-backend, deces-infra, and dataprep-frontend already use docker compose; only packages/tools and packages/dataprep-backend still forced the obsolete standalone binary.

Changes

• packages/tools/Makefile
  • export DC := docker-compose → export DC ?= docker compose (overridable, so a parent make's exported value still wins; consistent with deces-backend/deces-infra).
  • Removed the ifeq … sudo tee /usr/local/bin/docker-compose … endif wrapper-install block from the config target (the dev blocker). Replaced it with a non-sudo plugin presence check that mirrors the style already used in the repo:
    docker compose version >/dev/null 2>&1 || { echo "docker compose plugin required (install docker-compose-plugin)" >&2; exit 1; }
• packages/dataprep-backend/Makefile
  • DC := 'docker-compose' → DC ?= docker compose (dropped the quotes; a quoted two-word value would break ${DC} invocation).
  • Routed the one literal docker-compose logs call site (start target) through ${DC}.

Intentionally deferred (out of scope for a targeted dev-blocker fix)

• Offline binary bundling in packages/dataprep-backend/Makefile (package/depackage): these curl-download and ship a docker-compose 1.27.4 binary for air-gapped installs. Migrating changes a deployment assumption (target hosts must ship the compose plugin) and is left untouched.
• Base-image smoke parity checks: Makefile (deces-ui-base-image-smoke) and packages/deces-dataprep/Makefile (remote-base-image-smoke) each assert both docker compose version and the legacy docker-compose version over SSH against provisioned base images. These are not ${DC} call sites, not dev blockers, and are not part of PR CI. Dropping the legacy line flips a base-image contract and belongs in a separate base-image change.
• Cosmetic @echo docker-compose … display strings (pervasive across packages) — no functional effect, left as-is to keep the diff surgical.
• packages/tools/.travis.yml (installs standalone docker-compose 1.19.0) — Travis appears inactive: every sibling package disabled it via .travis.yml.old/.off, GitHub Actions is the live CI, and this file is master-gated while the repo deploys from main. Left untouched.

Validation

• make -C packages/tools -n config → runs the non-sudo docker compose version check, no sudo tee wrapper install.
• make -C packages/tools -n docker-build → docker compose config / docker compose build --pull --no-cache.
• make -C packages/dataprep-backend -n start → docker compose logs.
• Both Makefiles parse cleanly.
• ci.yml tools-swift job runs make -C packages/tools config on ubuntu-latest (compose plugin present + apt-installs docker-compose-plugin), so the new check passes with no sudo prompt.

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 25a5d487-5376-484d-93a5-bdd999d520cf

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/docker-compose-plugin-migration

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}