---
phase: 02-generators
plan: 02
subsystem: generators
tags: [rclone, ini, config-generation, pure-function, typescript]

# Dependency graph
requires:
  - phase: 02-01
    provides: generator test stubs and barrel index.ts
  - phase: 01-foundation
    provides: WizardState type from src/store/types.ts, BackendType from src/schemas/registry.ts
provides:
  - buildRcloneConf pure function (src/generators/rclone-conf.ts)
  - RCLONE_TYPE_MAP for BackendType -> rclone type string translation
affects: [03-ui, downstream phases consuming generated rclone.conf]

# Tech tracking
tech-stack:
  added: []
  patterns: [pure function generator pattern — takes WizardState, returns string, no side effects]

key-files:
  created: [src/generators/rclone-conf.ts]
  modified: []

key-decisions:
  - "RCLONE_TYPE_MAP Record<string, string> lookup handles BackendType-to-rclone-type translation at runtime — s3-compatible maps to 's3' not 's3-compatible'"
  - "Empty param values filtered with value !== '' guard — omits optional fields when blank to avoid broken rclone config lines"
  - "No logging of state — credentials never written to console (security requirement)"

patterns-established:
  - "Generator pattern: pure function (WizardState) => string — no side effects, no imports from BACKEND_REGISTRY, iterates params directly"
  - "Guard-first: throw immediately on null backendType or empty name before any output is produced"

requirements-completed: [CONF-01]

# Metrics
duration: 1min
completed: 2026-03-26
---

# Phase 02 Plan 02: buildRcloneConf Generator Summary

**buildRcloneConf pure function converts WizardState into valid rclone INI config strings with correct type mapping for azureblob, s3, and s3-compatible backends**

## Performance

- **Duration:** 1 min
- **Started:** 2026-03-26T10:56:08Z
- **Completed:** 2026-03-26T10:56:49Z
- **Tasks:** 1 (TDD — RED confirmed, GREEN implemented)
- **Files modified:** 1

## Accomplishments

- Implemented `buildRcloneConf(state: WizardState): string` as a pure TypeScript function
- RCLONE_TYPE_MAP correctly translates `s3-compatible` to `type = s3` (not `type = s3-compatible`) — critical rclone requirement
- Empty param values are filtered out — avoids `sas_url =` lines when field is blank
- Guard clauses throw on null backendType or empty remote name — fail fast before output
- All 17 test assertions in rclone-conf.test.ts pass GREEN (azureblob, s3, s3-compatible, error cases)

## Task Commits

Each task was committed atomically:

1. **Task 1: Implement buildRcloneConf** - `e3615c4` (feat) — TDD GREEN implementation

## Files Created/Modified

- `src/generators/rclone-conf.ts` — Pure function producing rclone INI config strings from WizardState

## Decisions Made

- RCLONE_TYPE_MAP as a `Record<string, string>` lookup rather than switch/case — clean extension point if new backend types are added
- Params iterated directly from `state.remote.params` — does not import BACKEND_REGISTRY (generator stays decoupled from schema layer)
- Security: no logging anywhere in this file — state contains raw credentials

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None. Three pre-existing RED test files (intune-detection, intune-install, rmm-script) remain failing as planned stubs for plans 02-03 and 02-04.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- CONF-01 satisfied: buildRcloneConf produces valid rclone INI strings for all three backends
- Plans 02-03 and 02-04 can now import from rclone-conf.ts if needed for script generation context
- Full test suite: 40 tests passing across 4 files; 3 files still RED as planned stubs

---
*Phase: 02-generators*
*Completed: 2026-03-26*