SoftwareApp
1f94d0a38a
docs/PERFORMANCE.md has been honest that three of its four numbers do not exist. They exist now as measurements, if not yet as results: benchmark/ is a macrobenchmark module with four tests - cold start with StartupTimingMetric, then opening, scrolling and searching a folder of a thousand files with FrameTimingMetric - sharing a fixture at /sdcard/AABenchmark that is created once per run and deleted in @AfterClass. Frames rather than a named trace section on purpose: what a user calls slow is jank on screen, and the alternative puts benchmarking calls into production code for the sake of a number. CompilationMode.None() is the honest cold-install baseline; Partial() plus a baseline profile is the follow-up and needs the same module. The storage grant is applied with appops in setup, which is what lets the run be unattended - a permission dialog is the one thing a test cannot answer. Three build facts had to be discovered rather than designed, and each is now written where it will be read. The app under test cannot keep its own package id: it needs a debug signature to install on a test device, so it cannot replace a release install, and an un-suffixed build is exactly that. It also cannot use the obvious suffix: `.benchmark` is already the benchmark module's own APK id, and the test APK then fails to install with INSTALL_FAILED_VERSION_DOWNGRADE - which is what the first attempt did. Hence `.perf`. And `testBuildType = "benchmark"` cannot be set unconditionally, because it makes benchmark the variant that *unit* tests run against and :app:testDebugUnitTest - the task the entire gate is built on - stops existing; it is behind -PbenchmarkBuild instead. All three were measured, not guessed, and the third would have broken CI silently. Two smaller things came with it. tools/verify.sh --release now also compiles the app's benchmark variant and the test APK, because build wiring nobody runs is wiring that rots; no device is involved. And the code map grew an EXTRA_ROOTS section so it indexes benchmark/ too - a map that silently omits a module lies by omission, which is worse than the one line it costs. The numbers themselves are still missing, and for a device reason rather than a code one: installing the new package id on this MIUI phone fails with INSTALL_FAILED_USER_RESTRICTED (the "Install via USB" gate, which wants a human and answered too late). Both APKs are pushed to /sdcard/Download/ for a manual install, and the run is one command away: `adb shell am instrument -w -e class de.softwareapp_hb.filemanager.benchmark.BrowserBenchmark de.softwareapp_hb.filemanager.benchmark/androidx.test.runner.AndroidJUnitRunner`. Gate green with --release, including the new compile step; map current; 386 tests unchanged.
134 lines
8.5 KiB
Markdown
134 lines
8.5 KiB
Markdown
# Working in this repository
|
|
|
|
**Plain Files** is a file manager for Android: Kotlin and Jetpack Compose, one Gradle module
|
|
(`app`), `minSdk` 26, `targetSdk` 36, and **no `INTERNET` permission** — "nothing leaves the
|
|
device" is a shipping requirement of this app, not a slogan. It is sold once (no ads, no
|
|
subscription, no billing code), and the prose in `docs/` is treated as part of the product.
|
|
|
|
Two habits shape everything here. **The app is driven on a real device** for anything a user can
|
|
see, and what that proved is written down. **A test name is a sentence** about behaviour, so the
|
|
suite doubles as the specification.
|
|
|
|
## Read these two first, and only then the source
|
|
|
|
| file | why |
|
|
|---|---|
|
|
| `docs/CODE_MAP.md` | Generated index of the source tree: what each file holds, and every test name in the suite. Start here for "which file is this in?" |
|
|
| `docs/ROADMAP.md` | Which milestone is done, the key decisions, and the deliberate deferrals |
|
|
|
|
Do **not** read `CHANGELOG.md` front to back — it is long, and it is meant to be grepped by
|
|
feature name once you know what you are changing.
|
|
|
|
## Commands
|
|
|
|
```bash
|
|
./tools/verify.sh # the gate: map check, detekt, tests, lint
|
|
./tools/verify.sh --release # ...and an R8 release build (what CI runs nightly)
|
|
GRADLE_FLAGS=--offline ./tools/verify.sh # when the network is unavailable
|
|
|
|
./gradlew :app:assembleDebug # then: adb install -r app/build/outputs/apk/debug/app-debug.apk
|
|
./tools/measure-startup.sh 5 # cold start, median of five, on the installed device
|
|
./gradlew :benchmark:connectedDebugAndroidTest # the four macrobenchmark tests (needs a device)
|
|
# add -PbenchmarkBuild: it targets the benchmark build
|
|
./gradlew :app:detektBaseline # re-freezes the findings that exist now — think before running it
|
|
python3 tools/make-code-map.py # regenerate docs/CODE_MAP.md after touching source
|
|
```
|
|
|
|
CI (`.github/workflows/verify.yml`) runs the same script on every push and pull request, plus a nightly
|
|
`--release` build, because R8 is the one check nothing else performs and it has hidden a real defect
|
|
here before. `git config core.hooksPath .githooks` runs it before every push as well.
|
|
|
|
The detekt gap it leaves — the findings in `config/detekt/baseline.xml` — is a **ratchet**: new
|
|
findings fail the build, existing ones are parked until the file they live in is touched for another
|
|
reason. `tools/` holds the gate and the generators; `config/detekt/` holds the rules and that baseline.
|
|
|
|
## Where things live, and the one rule about direction
|
|
|
|
```
|
|
core/ pure Kotlin, no Android imports: paths, names, kinds, sorting, planning
|
|
data/ storage backends (all-files access, SAF), volumes, shares, SQLite search/trash/favourites
|
|
domain/ operations over a source: copy/move/delete/rename, archives, search, duplicates
|
|
service/ the foreground service that keeps a long operation alive
|
|
ui/ Compose: browser/, viewer/, usage/, trash/, duplicates/, theme/
|
|
text/ domain enum to string resource
|
|
```
|
|
|
|
The dependency direction is `ui → domain → data → core`, and `core/` importing `android.*` or
|
|
`androidx.*` is a test failure, not a matter of taste: it is what keeps the trickiest logic
|
|
testable without Robolectric. `docs/CODE_MAP.md` has the per-file detail.
|
|
|
|
## Non-negotiables
|
|
|
|
Each of these is enforced somewhere, so breaking one fails a test, lint, or a reviewer's first
|
|
comment. `app/src/test/java/…/ProjectInvariantsTest.kt` holds the source-level ones.
|
|
|
|
- **No new permission, and never `INTERNET`.** The manifest's permission set is asserted exactly;
|
|
adding one means deciding it, explaining it in the manifest comment and the README, and updating
|
|
that list deliberately.
|
|
- **Every user-visible string comes from `strings.xml`.** The debug build enables a pseudo-locale
|
|
(`values-en-XA`), so untranslated text is visible on screen as unaccented text.
|
|
- **A name is one path segment.** `core/FileNames.isUsableName` is the only implementation; never
|
|
inspect `/` yourself. `StoragePath.child("a/b")` resolves *into a subfolder*, so an unguarded
|
|
call renames or creates something the dialog never offered.
|
|
- **Nothing is overwritten silently.** Operations refuse rather than destroy; deletes go through
|
|
the trash (24-hour window) and offer undo; a batch that cannot succeed is refused as a whole
|
|
rather than performed until it hits the problem.
|
|
- **Comments explain why, not what.** The house style is a KDoc paragraph per file and type that
|
|
says what it is for and what was rejected — decisions and limits, not restatements of the code.
|
|
- **A test name is a sentence about behaviour** (`a batch rename is a single undo step`), because
|
|
the names are read as the spec. Logic gets behaviour tests, rules about the shape of the project
|
|
get source-level tests, and **what a user sees gets a Compose rendering test** — those run on the
|
|
JVM through Robolectric, so they are part of the same gate rather than needing a device.
|
|
- **The docs are part of the change.** `CHANGELOG.md` (Added/Changed/Fixed, in the house voice),
|
|
the `ROADMAP.md` milestone table, the README if a claim changed, and `docs/EDGE_CASE_TESTING.md`
|
|
for anything only a device could confirm.
|
|
|
|
## Traps that have cost real time here
|
|
|
|
- **MIUI blocks `adb install` twice over.** Developer options needs *Install via USB*, and each
|
|
install then waits for a confirmation dialog that times out on its own. A bare
|
|
`INSTALL_FAILED_USER_RESTRICTED` means the dialog was answered late, not that the APK is bad.
|
|
- **Never run `assembleDebug` and `adb install` in one parallel batch.** They race, the install
|
|
takes the previous APK, and the feature you just wrote appears to be missing.
|
|
- **R8 has hidden real bugs.** A class reached only by reflection, or named only from a resource,
|
|
is stripped from the release build while debug works perfectly — this happened with `coil-video`,
|
|
where video frames decoded in debug and quietly fell back to icons for real users. When debug and
|
|
release disagree, assume the shrinker removed something.
|
|
- **`adb input text` does not deliver a `/`.** Send `input keyevent 76` instead. The slash is worth
|
|
testing at all because the field *accepts* it and the dialog is what refuses it.
|
|
- **Long-press multi-select via `input swipe x y x y 900` works, but not every time** — it has also
|
|
landed as a plain tap. A flaky gesture is a reason to look at the screen, not to distrust the code.
|
|
- **The debug build is a separate package** (`…filemanager.debug`), so it installs beside a release
|
|
build and the two can be compared directly.
|
|
|
|
- **detekt 1.23 cannot run on JDK 25.** It parses the version string of the JVM it runs on and
|
|
throws `25.0.4.1` as the entire error message, which is why `:app:detekt` drives the CLI on a 21
|
|
launcher. A bare version number as a build failure is this, not the code — and a **JDK 21 has to be
|
|
installed** for the toolchain to find: Gradle does not download one here.
|
|
- **A detekt baseline has to exist before it can be read.** It starts as an empty document on
|
|
purpose; `--create-baseline` cannot conjure the path it was told to consult.
|
|
|
|
## Documentation map — read on demand
|
|
|
|
| file | what it is for |
|
|
|---|---|
|
|
| `README.md` | The tour: features, layout, build, and the honest **known limitations** |
|
|
| `CHANGELOG.md` | The reasoning behind each change. Grep it; do not read it end to end |
|
|
| `docs/ROADMAP.md` | Milestones with their evidence, the key decisions, the deferrals |
|
|
| `docs/EDGE_CASE_TESTING.md` | What was verified, on which device or AVD, and what was not |
|
|
| `docs/PERFORMANCE.md` | The numbers that exist, and the ones that deliberately do not yet |
|
|
| `docs/PLAY_RELEASE_CHECKLIST.md` | Release only — work it in order |
|
|
| `docs/COMPETITIVE_ANALYSIS.md`, `docs/MONETISATION.md`, `docs/STORE_LISTING.md` | Product context, pricing, and length-checked listing copy |
|
|
| `PRIVACY.md` | The policy text the store listing points at |
|
|
|
|
## Definition of done
|
|
|
|
1. `./tools/verify.sh` green — the map current, detekt, the unit tests and lint in one command.
|
|
2. `python3 tools/make-code-map.py` run, so that `--check` passes.
|
|
3. A `CHANGELOG.md` entry in the house voice: what changed, why, what was rejected, and what was
|
|
verified rather than assumed.
|
|
4. Anything a user can see driven on a device or emulator, with the result written into
|
|
`docs/EDGE_CASE_TESTING.md` — including what was deliberately left untested, and why.
|
|
5. A commit whose subject is a sentence about the change and whose body explains the reasoning.
|
|
The diff already says what changed; the message is there for why it is this way.
|