werkator/docs/plan/01-build-state-domain.md

Step 01: Build State Domain and Repository

Prerequisites: none. Read README.md and 00-legacy-analysis.md first.

Goal

A tested domain model for build results plus a persistent repository, replacing the legacy build-results.tsv.

Design

Create package de.hoennig.werkator.build:

• BuildStatus enum: PENDING, RUNNING, SUCCESS, FAILED, INTERRUPTED, CANCELLED. Add isTerminal, isRestartable (pending/running/interrupted) properties.
• BuildResult data class: branch, commit SHA, status, startedAt, duration, artifactKey. Use java.time.Instant/Duration; format only at the edges.
• BuildResultRepository interface: append, update status of latest entry for a branch, query latest per branch, query history, delete entry, prune.
• FileBuildResultRepository: JSON file at .git/werkator/build-results.json. Write atomically (write temp file, then Files.move with ATOMIC_MOVE). Reuse the Jackson YAML/JSON setup style from ConfigLoader.

Business logic to include (port from legacy, see analysis):

• markStaleRunningAsInterrupted() — called at startup; running → interrupted, superseded pending → interrupted.
• Retention pruning: keep N builds per branch (artifacts.retentionPerBranch); drop entries for branches no longer on origin (branch list passed in as a parameter, no git dependency here).

Out of Scope

• No git access, no Gitea, no execution — pure domain and file I/O.
• Artifact directory pruning (step 05 consumes the pruning result).
• Age-based retention (legacy supported h/d suffixes); count-based only, extend later if needed.

Config

Uses existing artifacts.retentionPerBranch. No new keys expected.

Tests

Kotest FunSpec, no Spring context needed.

• Round-trip persistence, atomicity (temp file cleaned up).
• Status transition helpers and markStaleRunningAsInterrupted edge cases.
• Retention pruning: per-branch count, removed branches, ordering by timestamp.
• Corrupt/missing file → empty repository, no crash (legacy failed silently; we log a warning).

Acceptance Criteria

• ./gradlew ktlintFormat then ./gradlew build is green.
• New code has no dependency on picocli or web classes.

Execution Notes (done 2026-07-07)

Implemented as specified in de.hoennig.werkator.build; build green, 19 new tests. Deviations and details:

• Added jackson-datatype-jsr310 to build.gradle.kts for Instant/Duration JSON support (ISO-8601 strings).
• FileBuildResultRepository is a plain class, not a Spring bean; the file path depends on the runtime repo location, so wiring happens in step 04/06 via a factory or configuration.
• prune(...) and markStaleRunningAsInterrupted() return the removed/changed entries so step 05 can prune artifact directories and callers can log.
• Timestamp ties in updateLatest/latestFor resolve to the later appended entry.