Alby96andClaude Opus 5
85b2c99949
Creates the app skeleton and the seam everything else in the project hangs off: region-specific data lives in an asset file, not in code, so adding a region later is a new JSON file rather than a refactor. Notable choices: - applicationId and namespace are it.nuvolari.app rather than the doubled it.nuvolari.nuvolari that `flutter create` produces, with the Kotlin package and the iOS bundle identifiers moved to match. - SDK levels are pinned instead of inherited from `flutter.*`. Google Play requires API 36, and that is a release blocker rather than something to let a Flutter upgrade change silently. minSdk 24 is the highest floor the planned dependencies impose. - Riverpod and Dio-free for now, no code generation: see docs/stack-decisions.md. - Italian is the l10n source language, so app_it.arb is the template rather than a translation of an English original. The region parser rejects rather than repairs. An inverted bounding box, a map centre outside its own bounds, an unknown adapter name, a duplicate zone code or an empty attribution list all throw with the offending field named. Each of those would otherwise fail silently and visibly wrong: a swapped latitude and longitude renders the radar in the wrong place, an unknown adapter falling back to mock would show demo frames where live data was expected, and a missing attribution is a licence violation rather than a cosmetic gap. Tests run against the asset that actually ships and against a captured copy of the live ARPA CAP feed, so the eleven zone codes in the config are checked against the eleven the feed really emits rather than against a list retyped from documentation. Verified: dart format clean, flutter analyze 0 issues, 50 tests passing, flutter build appbundle --debug produces an AAB with applicationId it.nuvolari.app, minSdk 24, targetSdk 36. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Nuvolari
Precipitation radar for Piedmont, Italy. Android first, iOS later, one Flutter codebase.
Radar imagery comes from the public Radar-DPC platform, forecasts from MET Norway, weather alerts from the ARPA Piemonte XML-CAP bulletin. The app is free and ad-supported, with GDPR consent through Google's UMP.
Nuvolari is an independent app. It is not affiliated with, endorsed by, or operated by ARPA Piemonte or the Dipartimento della Protezione Civile. For civil-protection purposes the official channels always prevail.
Layout
app/ Flutter application (Dart package "nuvolari")
backend/ Python worker: fetches DPC rasters, crops, reprojects, renders PNG frames
docs/ architecture, data sources, licenses, stack decisions, roadmap, privacy
tool/ verification scripts
Start with docs/architecture.md, then docs/roadmap.md for what is built and what is next.
Toolchain
| Tool | Version |
|---|---|
| Flutter | 3.47.3 stable (Dart 3.13.3) |
| Android SDK | platform 36, build-tools 36.0.0, platform-tools |
| JDK | 21 |
| Python | 3.12+ (3.14 works; rasterio ships wheels for it) |
Configuration
Secrets never enter the repository. Copy the template and fill it in:
cp env.example.json env.json # env.json is git-ignored
| Key | Purpose |
|---|---|
MAP_STYLE_URL |
MapLibre style URL. Empty falls back to a local offline style. |
RADAR_MANIFEST_URL |
Base URL of the published manifest.json. |
RADAR_SOURCE |
mock (offline demo), dpc (live), arpa (disabled stub). |
METNO_USER_AGENT_CONTACT |
Contact address for the MET Norway User-Agent — mandatory for forecasts. |
ADMOB_APP_ID, ADMOB_BANNER_UNIT_ID |
Empty means Google's test ad units are used. |
Running
cd app
flutter run --dart-define-from-file=../env.json
With no env.json the app starts in demo mode: mock radar frames from assets, offline
base map style, test ad units. No network and no credentials required.
Verifying
.\tool\verify.ps1 # format, analyze, test, build, lint, pytest
.\tool\verify.ps1 -SkipBuild # fast inner loop
Stages whose target does not exist yet are skipped, so this runs from day one.
Attribution
Radar-DPC (CC BY-SA) · MET Norway (CC BY 4.0) · Arpa Piemonte · © OpenStreetMap contributors (ODbL). See docs/licenses.md for the obligations these carry — in particular, the rendered radar frames are a derived product of CC BY-SA data and inherit share-alike.