ML-159: cancelled as not fit for purpose

2026-05-03 20:46:20 +01:00
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+---
+id: ML-159
+title: Replicate CI pipeline on tangled.org
+status: Done
+assignee: []
+created_date: '2026-05-03 16:54'
+updated_date: '2026-05-03 19:46'
+labels: []
+dependencies: []
+documentation:
+  - 'doc-4 - CI Pipeline Porting Analysis: GitHub Actions → Tangled Spindles'
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Port the entire GitHub CI pipeline (lint, test, deploy) to tangled.org. The current pipeline includes: linting (format, gettext, credo, sobelow, mix_audit, shellcheck, Docker image validation, asset build), testing (partitioned tests with coverage ≥75%), deployment (Coolify API trigger via hurl, health check, post-deploy verification), dependency submission reporting, and a manual verification workflow. The goal is to replicate this functionality on tangled.org as the CI provider.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Cancelled. Two reasons:
+1. **Dev/CI parity loss** — moving from mise (used in both local dev and GitHub Actions) to Nix-based tooling would create a divergence between how developers install tools and how CI does. Mise reads `mise.toml` directly; Spindle would require either mise-as-nixpkgs-dep (adding download latency) or custom Nix derivations (adding maintenance burden).
+2. **No build artifact caching** — Spindle has no `actions/cache` equivalent. `mix deps`, `_build`, `node_modules`, and asset builds would recompile from scratch every run. With Elixir 1.20.0-rc.4 not in nixpkgs, even the toolchain download is uncached. Cold runs estimate 10-20 min vs ~5 min cached on GitHub Actions.
+
+Future direction: evaluate Buildkite (free solo tier, can wire production server as runner) or similar provider that supports caching and keeps mise-based tooling.
+<!-- SECTION:FINAL_SUMMARY:END -->