66 lines
2.8 KiB
Markdown
66 lines
2.8 KiB
Markdown
# Calendula
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## What This Is
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A modern Material 3 Expressive Android calendar app. Lives entirely on top
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of Android's `CalendarContract` — any calendar synced to the device (CalDAV
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via DAVx5, Google, local, WebCal, …) shows up automatically; creating,
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editing, and deleting writes straight back, and reminders are delivered by
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the app itself (Etar model). The differentiator is visual: real Material 3
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Expressive design that no existing FOSS calendar app delivers.
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## Core Value
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A calendar app that is genuinely pleasant to look at and use, without
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re-inventing the calendar sync stack — leave that to DAVx5 and the system.
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## Current Milestone
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Milestones 1 (read, v1.0) and 2 (write support, v1.1–v2.0.0 incl. reminder
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delivery) are **complete** — v2.0.0 shipped 2026-06-11. Everything since is
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tracked as issues and milestones on Codeberg:
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<https://codeberg.org/jlmakiola/calendula/milestones>. A milestone maps to its
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`release/vX.Y.Z` branch.
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## Stack
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Kotlin 2.3.21 (paired with KSP 2.3.9 — Kotlin 2.4.0 has no KSP release
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yet, do not upgrade until one ships). Jetpack Compose + Material 3
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Expressive 1.5.0-alpha21 (alpha is intentional — Expressive APIs only
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live in the 1.5 alpha line). Hilt 2.59.2, DataStore. Gradle Kotlin DSL
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with Version Catalog. AGP 9.2.1, Gradle 9.5.1. JVM target 17 (exactly — AGP
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requires it).
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The shared Material 3 Expressive kit, **floret-kit**, is a git submodule wired
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in as a Gradle composite build, so it compiles from source rather than resolving
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as a dependency.
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## Constraints
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- **Platform:** Android-only, Android 10+ (minSdk 29), targetSdk 36. No iOS.
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- **Offline-first:** all data lives in `CalendarContract` — no app database, no
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sync stack. No `INTERNET` permission; any feature needing one is an explicit
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product decision first.
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- **Privacy:** zero telemetry, zero analytics.
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- **i18n:** German + English from day one; further languages come from community
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translators via the self-hosted Weblate, which owns every `values-*` file.
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- **Tests + CI from day one**, JVM-first.
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- **Reproducible release builds**, so the official F-Droid repo can verify the
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published binary against a from-source rebuild.
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- **Licence:** MIT.
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## Naming
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"Calendula" — Latin *kalendae* ("first day of the month", root of "calendar")
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is also the etymological root of the marigold flower Calendula. The icon
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shows a stylized "1" on a slate squircle.
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## Source
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**Codeberg (`jlmakiola/calendula`) is canonical** — git, issues, PRs, tags and
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releases, plus contributor CI. The self-hosted Gitea instance is build
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infrastructure only: it holds the signing key, runs the release pipeline, and
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publishes the self-hosted F-Droid repo on Hetzner. Codeberg push-mirrors `main`
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and tags to Gitea, where a bumped `versionName` triggers the release. Also
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published to the official F-Droid repo. See `docs/RELEASING.md`.
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