Merge pull request 'build(fdroid): drop unused foojay toolchain resolver; release v2.7.4' (#24) from release/v2.7.4 into main

Reviewed-on: #24

.gitea/workflows/ci.yaml

@@ -30,6 +30,12 @@ jobs:
           # Full history so the base..HEAD diff below has a merge-base.
           fetch-depth: 0
 
+      # Cheap, always-on guard: the release build must stay reproducible for the
+      # official F-Droid repo (no AGP VCS-info embedding). Runs regardless of
+      # change scope so a regression can't slip through on a "docs-only" PR.
+      - name: Reproducible-release invariant
+        run: bash scripts/check_reproducible_release.sh
+
       # Decide whether anything that affects the app build changed. Docs,
       # F-Droid metadata and the licence don't, so those PRs skip the SDK +
       # Gradle work below but still report a green `ci`.
@@ -38,10 +44,20 @@ jobs:
         run: |
           set -e
           BASE="${{ github.base_ref }}"
-          git fetch --no-tags --depth=1 origin "$BASE"
+          # Full (not --depth=1) base fetch so the merge-base is present even when
-          CHANGED=$(git diff --name-only "origin/$BASE...HEAD")
+          # the PR branch forked several commits back; a shallow tip has no merge
+          # base with a divergent branch and `git diff base...HEAD` aborts.
+          git fetch --no-tags origin "$BASE"
+          MB=$(git merge-base "origin/$BASE" HEAD 2>/dev/null || true)
+          if [ -z "$MB" ]; then
+            # No common ancestor available — don't risk skipping the build.
+            echo "No merge base with origin/$BASE — running the full build to be safe."
+            echo "code=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+          CHANGED=$(git diff --name-only "$MB" HEAD)
           echo "Changed files:"; echo "$CHANGED"
-          if echo "$CHANGED" | grep -vE '(\.md$|^docs/|^fdroid-metadata/|^LICENSE$)' | grep -q .; then
+          if echo "$CHANGED" | grep -vE '(\.md$|^docs/|^fdroid-metadata/|^fastlane/|^LICENSE$)' | grep -q .; then
             echo "code=true" >> "$GITHUB_OUTPUT"
           else
             echo "code=false" >> "$GITHUB_OUTPUT"

.gitea/workflows/release.yaml

@@ -222,31 +222,27 @@ jobs:
           mkdir -p fdroid/repo
           cp app/build/outputs/apk/release/app-release.apk "fdroid/repo/calendula_v${VERSION}.apk"
 
-      - name: Copy metadata to F-Droid repo
+      # Per-version "What's New": ensure this version's changelog exists in the
+      # fastlane tree (committed at release-cut time for the official repo; this
+      # regenerates it from CHANGELOG.md so the self-hosted repo never depends on
+      # the commit having happened). The transform below then carries it across.
+      - name: Ensure this version's changelog is in the fastlane tree
+        if: env.IS_RELEASE == 'true'
+        run: bash scripts/sync_changelog_to_fastlane.sh
+
+      - name: Build F-Droid metadata from fastlane (single source of truth)
         run: |
           mkdir -p fdroid/metadata
-          cp -r fdroid-metadata/* fdroid/metadata/
+          # App-level control file (Categories/License/links) for the self-hosted
-
+          # repo's `fdroid update`.
-      # Per-version "What's New" for F-Droid clients: this version's CHANGELOG
+          cp fdroid-metadata/de.jeanlucmakiola.calendula.yml fdroid/metadata/
-      # section written to changelogs/<versionCode>.txt (same extraction as the
+          # Localized text + graphics + per-version changelogs come from the SAME
-      # Gitea release notes). en-US only — F-Droid falls back to it for locales
+          # fastlane tree the official F-Droid repo harvests from source,
-      # without their own changelog. fdroid update bakes this into the index.
+          # transformed into the F-Droid repo "localized" layout. One source of
-      - name: Generate F-Droid changelog for this version
+          # truth, both channels.
-        if: env.IS_RELEASE == 'true'
+          bash scripts/fastlane_to_fdroid_localized.sh \
-        run: |
+            fastlane/metadata/android \
-          set -e
+            fdroid/metadata/de.jeanlucmakiola.calendula
-          awk -v ver="$VERSION" '
-            $0 ~ "^## \\[" ver "\\]" { flag = 1; next }
-            /^## \[/ { flag = 0 }
-            flag' CHANGELOG.md > /tmp/changelog.txt
-          sed -i -e '/./,$!d' /tmp/changelog.txt
-          if [ ! -s /tmp/changelog.txt ]; then
-            echo "See CHANGELOG.md for $VERSION." > /tmp/changelog.txt
-          fi
-          CL_DIR="fdroid/metadata/de.jeanlucmakiola.calendula/en-US/changelogs"
-          mkdir -p "$CL_DIR"
-          cp /tmp/changelog.txt "$CL_DIR/${VERSION_CODE}.txt"
-          echo "Wrote $CL_DIR/${VERSION_CODE}.txt"
 
       - name: Generate F-Droid Index
         run: |

CHANGELOG.md

@@ -7,6 +7,22 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.7.4] — 2026-06-21
+
+### Changed
+- Build cleanup that lets Calendula ship in the official F-Droid repository:
+  removed an unused Gradle toolchain-resolver plugin, which F-Droid's offline,
+  reproducible build process disallows. No functional or visible changes — this
+  is the same app as 2.7.3.
+
+## [2.7.3] — 2026-06-21
+
+### Fixed
+- Home-screen widgets no longer get stuck on a loading spinner in the published
+  (F-Droid) release build. They render via Android's background-work system, and
+  release optimisation (R8) was stripping a helper class it loads by name, so the
+  render job never ran. Added the missing keep rule — widgets now load normally.
+
 ## [2.7.2] — 2026-06-21
 
 ### Added

README.md

@@ -1,6 +1,6 @@
 <div align="center">
 
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/icon.png" width="112" alt="Calendula icon">
+<img src="fastlane/metadata/android/en-US/images/icon.png" width="112" alt="Calendula icon">
 
 <h1>Calendula</h1>
 
@@ -16,11 +16,11 @@ Reads, writes, and reminds — on top of the system calendar, with zero network
 </p>
 
 <p>
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/phoneScreenshots/01-week.png" width="19%" alt="Week view">&nbsp;
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/01-week.png" width="19%" alt="Week view">&nbsp;
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/phoneScreenshots/02-month.png" width="19%" alt="Month view">&nbsp;
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/02-month.png" width="19%" alt="Month view">&nbsp;
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/phoneScreenshots/04-detail.png" width="19%" alt="Event detail">&nbsp;
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/04-detail.png" width="19%" alt="Event detail">&nbsp;
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/phoneScreenshots/05-edit.png" width="19%" alt="Event form">&nbsp;
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/05-edit.png" width="19%" alt="Event form">&nbsp;
-<img src="fdroid-metadata/de.jeanlucmakiola.calendula/en-US/phoneScreenshots/06-onboarding.png" width="19%" alt="Reminder onboarding">
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/06-onboarding.png" width="19%" alt="Reminder onboarding">
 </p>
 
 </div>

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 20702
+        versionCode = 20704
-        versionName = "2.7.2"
+        versionName = "2.7.4"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -47,6 +47,11 @@ android {
 
     buildTypes {
         release {
+            // Keep release builds reproducible for F-Droid: don't let AGP embed
+            // build-environment git metadata (META-INF/version-control-info.textproto),
+            // whose `revision`/path content varies by build machine and is the only
+            // thing that otherwise differs from a clean from-source rebuild.
+            vcsInfo { include = false }
             isMinifyEnabled = true
             isShrinkResources = true
             proguardFiles(

app/proguard-rules.pro

@@ -15,3 +15,14 @@
 # Keep the generated Room database implementations fully intact.
 -keep class * extends androidx.room.RoomDatabase { *; }
 -dontwarn androidx.room.paging.**
+
+# WorkManager instantiates an InputMerger reflectively (Class.newInstance) from
+# the fully-qualified class name persisted in the WorkSpec, so the class must
+# keep both its name and a no-arg constructor. Glance renders every widget
+# through a WorkManager worker (androidx.glance.session.SessionWorker) whose
+# default merger is androidx.work.OverwritingInputMerger. Under R8 full mode
+# (AGP 9 default) that unused no-arg constructor was stripped, so WorkManager
+# threw "OverwritingInputMerger has no zero argument constructor", the
+# SessionWorker never ran, and widgets were stuck on their loading layout
+# (a blank spinner) in release builds. Keep every InputMerger's name + ctor.
+-keep class * extends androidx.work.InputMerger { <init>(...); }

docs/README.md

@@ -12,7 +12,9 @@ Where to look for what:
 | [`../.planning/STATE.md`](../.planning/STATE.md) | Snapshot of where development currently stands |
 | [`superpowers/specs/`](superpowers/specs/) | The original design spec (2026-06-08) — historical record, not updated |
 | [`superpowers/plans/`](superpowers/plans/) | Per-milestone implementation plans with task checklists — historical record of how each slice was built, including provider lessons learned |
-| [`../fdroid-metadata/`](../fdroid-metadata/) | F-Droid/fastlane store metadata: descriptions, icon, screenshots (DE + EN) |
+| [`../fastlane/metadata/android/`](../fastlane/metadata/android/) | Store metadata (single source of truth): descriptions, title, icon, screenshots (DE + EN). Harvested directly by the official F-Droid repo; transformed into the self-hosted repo layout at release time by [`../scripts/fastlane_to_fdroid_localized.sh`](../scripts/fastlane_to_fdroid_localized.sh) |
+| [`../fdroid-metadata/`](../fdroid-metadata/) | App-level F-Droid control file (`*.yml`: Categories, License, links) for the self-hosted repo's `fdroid update` |
+| [`fdroid-official/`](fdroid-official/) | Draft recipe + notes for publishing to the **official** F-Droid repo (reproducible build + developer-signed binary) |
 
 Conventions: plans and specs under `superpowers/` are point-in-time
 artifacts of the agentic workflow that built each milestone — they get

docs/RELEASING.md

@@ -33,7 +33,15 @@ Published version codes so far: `v0.1.0`→100 … `v1.0.0`→10000 … `v2.0.0`
    the F-Droid per-version changelog.
 3. Bump the committed `versionName` (and `versionCode`) in
    `app/build.gradle.kts` to the new version. **This bump is what triggers the
-   release** when the branch merges to `main`.
+   release** when the branch merges to `main`. Then run
+   ```bash
+   scripts/sync_changelog_to_fastlane.sh
+   ```
+   and commit the generated
+   `fastlane/metadata/android/en-US/changelogs/<versionCode>.txt`. This is what
+   makes the **official** F-Droid repo show this version's changelog (it reads
+   the changelog from the tagged source tree). The self-hosted pipeline
+   regenerates it regardless, so forgetting only affects the official listing.
 4. **Verify the release build on a real device** — the mandatory gate. The
    shipped APK is R8-shrunk/obfuscated, and bugs that only appear there, or
    only on first run, never show up in the debug build or on a device that

docs/fdroid-official/README.md

@@ -0,0 +1,94 @@
+# Official F-Droid submission (draft)
+
+Goal: publish Calendula to the **official F-Droid repo** *alongside* the
+self-hosted repo, as **one app** — same signed binary in both channels, so
+existing self-hosted users migrate with no reinstall and no data loss.
+
+This folder holds the **draft** fdroiddata recipe. Nothing here is submitted
+yet. The self-hosted pipeline (`../../fdroid-metadata/`, `.gitea/workflows/release.yaml`)
+is unaffected by these files.
+
+## Publishing model: reproducible build + developer-signed binary
+
+F-Droid builds Calendula from source on its buildserver, then verifies the
+output is byte-for-byte identical to **our** signed APK (fetched via the
+`Binaries` URL). On a match it publishes **our** binary, signed with **our**
+key — identified by `AllowedAPKSigningKeys`. Result: official and self-hosted
+both carry the same signature. If a build ever fails to match, F-Droid simply
+skips that version (fails safe — no bad publish).
+
+## Verification status (2026-06-21)
+
+- ✅ **Run-to-run reproducible** — `v2.7.0` built twice from a clean worktree
+  (R8 minify + resource-shrink, build cache off) → byte-for-byte identical
+  (`sha256 568c944a…`).
+- ✅ **Cross-JDK reproducible** — rebuilt with JDK 17 and JDK 21 → identical
+  APK. JDK version is not a sensitivity, so it need not be pinned.
+- ✅ **Tag self-consistent** — committed `versionCode`/`versionName` already
+  equal the tag-derived values, so F-Droid building the tag as-is matches the
+  CI-published binary (CI's `sed` substitution is a no-op).
+- ✅ **App signing cert SHA-256 extracted** from published APKs (identical
+  across v1.0.0 / v2.0.0 / v2.4.0): `5cdaee8e…`. No keystore needed.
+- ✅ **Eligibility** — MIT, 100% FOSS deps (no Play Services / Firebase /
+  analytics / billing), no `INTERNET` permission, no native code.
+- ✅ **End-to-end reproducible vs the DISTRIBUTED binary** — built tag `v2.7.1`
+  from source and compared against the published `calendula_v2.7.1.apk`: every
+  app entry (dex / resources / assets / manifest) byte-identical. The only
+  difference was `META-INF/version-control-info.textproto` (AGP's git metadata,
+  env-dependent). Fixed with `vcsInfo { include = false }` on the release build;
+  re-validated → 0 non-signature differences. **Takes effect from the first
+  release built after that change — submit the recipe starting at that version**
+  (v2.7.1 and earlier still embed the textproto and won't verify).
+- ⚠️ **Not yet proven**: cross-host / fixed-build-path reproducibility on
+  F-Droid's buildserver (low risk for a no-NDK pure-JVM app; with vcsInfo
+  disabled, the env-dependent field is gone; F-Droid confirms at review).
+- ✅ **Buildserver toolchain supported** (checked 2026-06-21):
+  - **Gradle 9.5.1** is in F-Droid's gradle-transparency-log (`checksums.json`)
+    with a verified sha256, so `gradlew.py` will download + verify + run it.
+  - **AGP 9.2** is in `gradlew.py`'s `MIN_GRADLE_VERSION` map (`9.2 -> 9.4.1`).
+  - **JDK 17** is standard on the buildserver (AGP 9.2 requires exactly 17).
+  - **build-tools 36.0.0 / android-37**: not statically preinstalled (baseline
+    stops at 33), but `provision-android-sdk` makes `$ANDROID_HOME/build-tools`
+    and `/platforms` group-writable so AGP/Gradle install newer ones on demand.
+
+## Before submitting — checklist
+
+1. Confirm the `Binaries` URL is publicly reachable and stable long-term, e.g.
+   `https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo/calendula_v2.7.0.apk`
+   resolves to the dev-signed APK. F-Droid re-fetches it on every build.
+2. Confirm F-Droid's buildserver supports the toolchain (see timing risk).
+3. (Recommended) Reproduce one published release end-to-end: build the tag from
+   source, strip signatures, and diff against the downloaded `calendula_v<ver>.apk`
+   to confirm the from-source build matches the *distributed* binary — not just
+   another local build.
+
+## Submission steps (fdroiddata, GitLab)
+
+1. Fork `https://gitlab.com/fdroid/fdroiddata`.
+2. Copy `de.jeanlucmakiola.calendula.yml` to `metadata/` in the fork.
+3. Test locally with `fdroid build -v de.jeanlucmakiola.calendula` and
+   `fdroid lint de.jeanlucmakiola.calendula` (and `fdroid readmeta`).
+4. Open a Merge Request. Initial review can take weeks to months; the
+   self-hosted repo keeps serving in the meantime, so there's no rush.
+
+## Listing metadata (descriptions, screenshots, icon)
+
+These are **not** in the recipe `.yml`. F-Droid's `fdroid update` harvests them
+automatically from the fastlane tree in the app's source repo:
+
+    fastlane/metadata/android/<locale>/
+      short_description.txt   full_description.txt   title.txt
+      images/icon.png         images/phoneScreenshots/*.png
+      changelogs/<versionCode>.txt   (optional, per release)
+
+This is the single source of truth: en-US + de-DE already exist there, and the
+self-hosted repo is generated from the same tree at release time via
+`scripts/fastlane_to_fdroid_localized.sh`. Nothing extra to add to fdroiddata —
+F-Droid picks the listing up from source. (Screenshots may not be committed to
+the fdroiddata repo anyway, so the source-tree fastlane layout is required.)
+
+Per-version changelogs: the self-hosted release workflow generates
+`changelogs/<versionCode>.txt` at release time. For the official repo to show a
+changelog, that file must be committed into `fastlane/metadata/android/<locale>/changelogs/`
+at the tagged commit — wire this into the release/version-bump step, or accept
+no in-client changelog for the official listing initially.

docs/fdroid-official/de.jeanlucmakiola.calendula.yml

@@ -0,0 +1,63 @@
+# ---------------------------------------------------------------------------
+# DRAFT fdroiddata metadata for the OFFICIAL F-Droid repository.
+#
+# This is NOT the self-hosted metadata (that lives in ../../fdroid-metadata/).
+# When submitting, this file's contents go to fdroiddata on GitLab as
+#   metadata/de.jeanlucmakiola.calendula.yml
+# See README.md in this folder for the verification status and submission steps.
+#
+# Publishing model: REPRODUCIBLE BUILD + developer-signed binary.
+# F-Droid builds from source on its buildserver, then verifies the result is
+# identical to our own signed APK (fetched via `Binaries`). If it matches,
+# F-Droid publishes OUR binary signed with OUR key (`AllowedAPKSigningKeys`),
+# so the official and self-hosted channels carry the SAME signature and users
+# migrate between them with no reinstall / no data loss.
+# ---------------------------------------------------------------------------
+
+Categories:
+  - Calendar & Agenda
+License: MIT
+AuthorName: Jean-Luc Makiola
+SourceCode: https://gitea.jeanlucmakiola.de/makiolaj/calendula
+IssueTracker: https://gitea.jeanlucmakiola.de/makiolaj/calendula/issues
+Changelog: https://gitea.jeanlucmakiola.de/makiolaj/calendula/src/branch/main/CHANGELOG.md
+
+AutoName: Calendula
+
+RepoType: git
+Repo: https://gitea.jeanlucmakiola.de/makiolaj/calendula.git
+
+# First build entry = v2.7.4, the first release that BOTH disables AGP VCS-info
+# (`vcsInfo { include = false }`, since v2.7.3) AND drops the unused Gradle
+# foojay toolchain-resolver plugin, which F-Droid's offline build scanner rejects
+# (it can fetch a JDK over the network). The plugin was inert here (no toolchain
+# block invoked it), so v2.7.4 is functionally identical to v2.7.3 and reproduces
+# byte-for-byte from source. v2.7.3 and earlier either embed
+# META-INF/version-control-info.textproto or trip the foojay scanner — do not
+# target them. Subsequent versions are added automatically (AutoUpdateMode).
+Builds:
+  - versionName: 2.7.4
+    versionCode: 20704
+    commit: v2.7.4
+    subdir: app
+    gradle:
+      - yes
+    # No NDK / no flavors. The release buildType applies a signingConfig only
+    # when key.properties exists; on the buildserver it does not, so this
+    # produces the unsigned APK F-Droid compares against our binary.
+
+# SHA-256 of our app signing certificate (public; embedded in every published
+# APK). Locks F-Droid to publish only binaries signed with our key.
+AllowedAPKSigningKeys: 5cdaee8eb31cb0df9157c646ae3ec8b3dc43b5bb72624e088c9ddea0c4eb5ec1
+
+# Our own developer-signed APK for reproducible-build verification. %v -> the
+# versionName, so v2.7.4 resolves to calendula_v2.7.4.apk on the self-hosted repo.
+Binaries: https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo/calendula_v%v.apk
+
+# After this one-time submission F-Droid auto-tracks new vX.Y.Z tags and creates
+# build entries itself — no manual recipe edits per release. The tag regex keeps
+# it to release tags only.
+AutoUpdateMode: Version
+UpdateCheckMode: Tags ^v[0-9.]+$
+CurrentVersion: 2.7.4
+CurrentVersionCode: 20704

fastlane/metadata/android/de-DE/title.txt

@@ -0,0 +1 @@
+Calendula

fastlane/metadata/android/en-US/changelogs/20701.txt

@@ -0,0 +1,8 @@
+### Fixed
+- Fixed the app crashing immediately on launch whenever calendar access hadn't
+  been granted yet (a fresh install, or after revoking the permission). The app
+  set up its live calendar-change listener before the permission screen could
+  appear, which newer Android versions reject outright — so the app died before
+  you could grant access. The listener now waits for the permission and attaches
+  itself the moment it's granted.
+

fastlane/metadata/android/en-US/changelogs/20703.txt

@@ -0,0 +1,6 @@
+### Fixed
+- Home-screen widgets no longer get stuck on a loading spinner in the published
+  (F-Droid) release build. They render via Android's background-work system, and
+  release optimisation (R8) was stripping a helper class it loads by name, so the
+  render job never ran. Added the missing keep rule — widgets now load normally.
+

fastlane/metadata/android/en-US/changelogs/20704.txt

@@ -0,0 +1,6 @@
+### Changed
+- Build cleanup that lets Calendula ship in the official F-Droid repository:
+  removed an unused Gradle toolchain-resolver plugin, which F-Droid's offline,
+  reproducible build process disallows. No functional or visible changes — this
+  is the same app as 2.7.3.
+

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+Calendula

scripts/check_reproducible_release.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Reproducibility guard for the official F-Droid repo.
+#
+# F-Droid only republishes OUR signed binary if a from-source build reproduces
+# it byte-for-byte. AGP's VCS-info injection writes
+# META-INF/version-control-info.textproto with build-environment git metadata
+# (commit hash / path) — env-dependent, and the one thing that broke
+# reproducibility before we disabled it. It MUST stay off on the release build,
+# or new versions silently stop publishing to the official repo (fails safe, but
+# you'd be stuck on an old version without noticing). Fail loudly if it regresses.
+set -euo pipefail
+F="app/build.gradle.kts"
+
+# Match `vcsInfo { ... include = false ... }` within the block, tolerant of
+# whitespace/newlines (-z: whole file as one record; [^}] stays inside the block).
+if grep -Pzoq 'vcsInfo\s*\{[^}]*include\s*=\s*false' "$F"; then
+  echo "OK: release build disables AGP VCS-info — stays reproducible for F-Droid."
+else
+  echo "ERROR: '$F' release build is missing 'vcsInfo { include = false }'." >&2
+  echo "AGP would embed env-dependent git metadata (version-control-info.textproto)," >&2
+  echo "breaking F-Droid reproducible builds. Restore it. See docs/fdroid-official/." >&2
+  exit 1
+fi

scripts/fastlane_to_fdroid_localized.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Single source of truth: fastlane/metadata/android/<locale>/ feeds BOTH the
+# official F-Droid repo (harvested from source automatically) and the
+# self-hosted repo. This script transforms the fastlane layout into the F-Droid
+# "localized" layout that the self-hosted `fdroid update` consumes, so we don't
+# maintain two copies.
+#
+#   usage: fastlane_to_fdroid_localized.sh <fastlane_android_dir> <out_localized_dir>
+#   e.g.   scripts/fastlane_to_fdroid_localized.sh \
+#              fastlane/metadata/android \
+#              fdroid/metadata/de.jeanlucmakiola.calendula
+#
+# Mapping (fastlane -> F-Droid repo localized):
+#   short_description.txt        -> summary.txt
+#   full_description.txt         -> description.txt
+#   title.txt                    -> name.txt
+#   images/icon.png              -> icon.png
+#   images/phoneScreenshots/*    -> phoneScreenshots/*
+#   changelogs/<versionCode>.txt -> changelogs/<versionCode>.txt
+# (changelogs are seeded into the fastlane tree by
+#  scripts/sync_changelog_to_fastlane.sh.)
+set -euo pipefail
+
+SRC="${1:?need fastlane android dir, e.g. fastlane/metadata/android}"
+OUT="${2:?need output localized dir, e.g. fdroid/metadata/<appid>}"
+
+shopt -s nullglob
+for locdir in "$SRC"/*/; do
+  loc="$(basename "$locdir")"
+  dst="$OUT/$loc"
+  mkdir -p "$dst"
+  [ -f "$locdir/short_description.txt" ] && cp "$locdir/short_description.txt" "$dst/summary.txt"
+  [ -f "$locdir/full_description.txt"  ] && cp "$locdir/full_description.txt"  "$dst/description.txt"
+  [ -f "$locdir/title.txt"             ] && cp "$locdir/title.txt"             "$dst/name.txt"
+  [ -f "$locdir/images/icon.png"       ] && cp "$locdir/images/icon.png"       "$dst/icon.png"
+  if [ -d "$locdir/images/phoneScreenshots" ]; then
+    mkdir -p "$dst/phoneScreenshots"
+    cp "$locdir"images/phoneScreenshots/* "$dst/phoneScreenshots/"
+  fi
+  # Per-version changelogs live in the same fastlane tree (see
+  # scripts/sync_changelog_to_fastlane.sh) and map straight across.
+  if [ -d "$locdir/changelogs" ]; then
+    mkdir -p "$dst/changelogs"
+    cp "$locdir"changelogs/* "$dst/changelogs/"
+  fi
+done
+
+echo "Built F-Droid localized metadata in '$OUT' from '$SRC'"

scripts/sync_changelog_to_fastlane.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# Write the current version's CHANGELOG.md section into the fastlane changelog
+# file that F-Droid harvests: fastlane/metadata/android/en-US/changelogs/<code>.txt
+# (en-US is F-Droid's fallback locale, so it covers every language).
+#
+# Run this when cutting a release (after editing CHANGELOG.md and bumping
+# versionName in app/build.gradle.kts) and COMMIT the result, so the OFFICIAL
+# F-Droid repo — which reads the changelog from the tagged source tree — shows
+# this version's "What's New". The self-hosted release pipeline also runs it so
+# its changelog never depends on the file having been committed. Idempotent.
+#
+# Extraction matches the awk used for the Gitea release notes so all three
+# (release notes, self-hosted changelog, official changelog) stay in sync.
+set -euo pipefail
+cd "$(dirname "$0")/.."   # repo root
+
+VERSION=$(grep -oP 'versionName\s*=\s*"\K[^"]+' app/build.gradle.kts)
+[ -n "$VERSION" ] || { echo "No versionName in app/build.gradle.kts" >&2; exit 1; }
+MAJOR=${VERSION%%.*}; rest=${VERSION#*.}; MINOR=${rest%%.*}; PATCH=${rest##*.}
+MAJOR=${MAJOR:-0}; MINOR=${MINOR:-0}; PATCH=${PATCH:-0}
+VERSION_CODE=$(( MAJOR * 10000 + MINOR * 100 + PATCH ))
+
+CL_DIR="fastlane/metadata/android/en-US/changelogs"
+mkdir -p "$CL_DIR"
+OUT="$CL_DIR/${VERSION_CODE}.txt"
+
+awk -v ver="$VERSION" '
+  $0 ~ "^## \\[" ver "\\]" { flag = 1; next }
+  /^## \[/ { flag = 0 }
+  flag' CHANGELOG.md > "$OUT"
+# Trim leading blank lines (same as the pipeline did).
+sed -i -e '/./,$!d' "$OUT"
+if [ ! -s "$OUT" ]; then
+  echo "See CHANGELOG.md for $VERSION." > "$OUT"
+fi
+
+CHARS=$(wc -m < "$OUT" | tr -d ' ')
+echo "Wrote $OUT (version $VERSION, code $VERSION_CODE, ${CHARS} chars)"
+if [ "$CHARS" -gt 500 ]; then
+  echo "  note: >500 chars — F-Droid may truncate this changelog in-client." >&2
+fi

settings.gradle.kts

@@ -11,9 +11,6 @@ pluginManagement {
         gradlePluginPortal()
     }
 }
-plugins {
-    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
-}
 
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)