dtourolleandClaude Opus 5
126beaf7ed
The APK stopped building the moment the tree gained Java with prose in it: 55 errors, every one "unmappable character (0x94)", every one from a comment. The code was fine. javac reads sources in the *platform* encoding, and the build container sets no locale, so that is US-ASCII. Every curly quote and em dash in a doc comment is then unrepresentable. The repository is UTF-8 throughout, so this says so rather than asking one file's prose to be typed in ASCII to suit a default nobody chose. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
324 lines
15 KiB
Bash
Executable File
324 lines
15 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Assemble a signed APK from an already-built libdarkroom.so.
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#
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# This runs *inside* the Android image, where the SDK lives. It is deliberately
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# separate from package.sh: package.sh is a host-side convenience that mounts
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# the repo into a container and drives the whole build, while CI already runs
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# in that image and needs only this half. Keeping the assembly in one file
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# means the APK a device gets from `package.sh --install` and the APK CI
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# publishes are built by the same code, rather than by two copies that drift.
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#
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# Everything is overridable, because the two callers disagree about paths: the
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# container mounts the repo at /work, CI checks it out wherever the runner
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# likes.
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#
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# REPO repo root (default: this script's ../..)
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# TARGET_DIR cargo target directory (default: $REPO/target-android)
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# JNILIBS where cargo-ndk wrote the .so (default: $TARGET_DIR/jniLibs)
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# OUT output directory (default: $TARGET_DIR/apk)
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# KEYSTORE signing keystore (default: $TARGET_DIR/debug.keystore)
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# ABI Android ABI (default: arm64-v8a)
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# RUST_TARGET Rust target triple (default: aarch64-linux-android)
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#
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# Signing. With none of these set the APK is debug-signed with a generated
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# throwaway key, which is what a test device wants. Set all three for a real
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# signature:
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#
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# KEYSTORE_PASS keystore password — presence of this is what selects
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# release signing
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# KEY_PASS key password (default: same as KEYSTORE_PASS)
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# KEY_ALIAS key alias within the store
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#
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# The passwords are read from the environment and handed to apksigner as
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# `env:`, never `pass:`. `pass:` puts the password in the process table, where
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# every other process on the machine can read it out of `ps`.
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set -euo pipefail
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HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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REPO="$(cd "${REPO:-${HERE}/../..}" && pwd)"
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TARGET_DIR="${TARGET_DIR:-${REPO}/target-android}"
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mkdir -p "${TARGET_DIR}"
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TARGET_DIR="$(cd "${TARGET_DIR}" && pwd)"
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JNILIBS="${JNILIBS:-${TARGET_DIR}/jniLibs}"
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OUT="${OUT:-${TARGET_DIR}/apk}"
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KEYSTORE="${KEYSTORE:-${TARGET_DIR}/debug.keystore}"
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# Release signing is selected by supplying a password, not by a flag, so there
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# is no way to ask for a release build and silently get a debug one.
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if [[ -n "${KEYSTORE_PASS:-}" ]]; then
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SIGNING=release
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KEY_ALIAS="${KEY_ALIAS:?KEY_ALIAS is required when KEYSTORE_PASS is set}"
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export DR_KS_PASS="${KEYSTORE_PASS}"
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export DR_KEY_PASS="${KEY_PASS:-${KEYSTORE_PASS}}"
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else
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SIGNING=debug
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KEY_ALIAS="androiddebugkey"
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export DR_KS_PASS=android
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export DR_KEY_PASS=android
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fi
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ABI="${ABI:-arm64-v8a}"
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RUST_TARGET="${RUST_TARGET:-aarch64-linux-android}"
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SDK="${ANDROID_HOME:-/opt/android-sdk}"
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# Resolved rather than hard-coded: the versions live in the Dockerfile as ARGs,
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# and a second copy here is a second thing to forget when they move. The newest
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# installed build-tools wins.
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BT="$(find "${SDK}/build-tools" -maxdepth 1 -mindepth 1 -type d | sort -V | tail -1)"
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[[ -n "${BT}" ]] || { echo "error: no build-tools in ${SDK}" >&2; exit 1; }
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# The Dockerfile sets ANDROID_JAR to the compile SDK; see its comment for why
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# that is not the same number as MIN_API.
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ANDROID_JAR="${ANDROID_JAR:-$(find "${SDK}/platforms" -maxdepth 1 -name 'android-*' \
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| sort -V | tail -1)/android.jar}"
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[[ -f "${ANDROID_JAR}" ]] || { echo "error: no android.jar at ${ANDROID_JAR}" >&2; exit 1; }
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# MIN_API comes from the Dockerfile too, so the manifest the device reads and
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# the API the linker targeted cannot disagree.
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MIN_API="$(sed -n 's/^ARG MIN_API=\([0-9]*\).*/\1/p' "${REPO}/docker/android/Dockerfile")"
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[[ -n "${MIN_API}" ]] || { echo "error: no ARG MIN_API= in docker/android/Dockerfile" >&2; exit 1; }
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TARGET_API="$(basename "$(dirname "${ANDROID_JAR}")" | sed 's/^android-//')"
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# The version, taken from the workspace rather than restated here. See
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# package.sh for why versionCode is packed the way it is.
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VERSION_NAME="$(sed -n 's/^version = "\(.*\)"$/\1/p' "${REPO}/Cargo.toml" | head -1)"
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[[ -n "${VERSION_NAME}" ]] || { echo "error: no version in Cargo.toml" >&2; exit 1; }
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VERSION_CODE="$(awk -F. '{ print $1 * 10000 + $2 * 100 + $3 }' <<< "${VERSION_NAME}")"
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echo "==> version ${VERSION_NAME} (code ${VERSION_CODE}), min API ${MIN_API}, target API ${TARGET_API}"
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SO="${JNILIBS}/${ABI}/libdarkroom.so"
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[[ -f "${SO}" ]] || { echo "error: ${SO} not built" >&2; exit 1; }
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rm -rf "${OUT}"
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mkdir -p "${OUT}/staging/lib/${ABI}"
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# Slint compiles a Java helper (SlintAndroidJavaHelper) in its build script and
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# dexes it. The build-dir hash changes whenever its inputs change, so find it
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# rather than hard-coding a path; the newest wins if stale directories from
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# earlier builds are still around.
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DEX="$(find "${TARGET_DIR}/${RUST_TARGET}/release/build" \
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-path "*i-slint-backend-android-activity*/out/classes.dex" \
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-printf "%T@ %p\n" 2>/dev/null | sort -rn | head -1 | cut -d" " -f2-)"
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[[ -n "${DEX}" ]] || { echo "error: Slint classes.dex not found — did the backend build?" >&2; exit 1; }
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echo " dex: ${DEX}"
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# ---------------------------------------------------------------------------
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# Our own Java.
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#
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# Almost all of this app is Rust, and the classes here are the exceptions the
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# platform forces: Android constructs some things itself, from a class named in
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# the manifest, and hands the result back. A `ContentProvider` is one — the
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# system instantiates it, nothing in the process ever calls its constructor —
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# and reaching the launch `Intent` is another, because it arrives through
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# `Activity.getIntent()` and android-activity gives Rust a JNI handle to a
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# stock `NativeActivity` rather than a subclass it could have put code in.
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# Neither can be written as Rust at any price, so the APK needs a dex of ours.
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#
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# Skipped when the tree has no Java, which is the state this build was in until
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# FR-PLAT-AND-6 and the state a cut-down branch may return to. The step then
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# costs nothing and the APK carries Slint's dex alone, exactly as before.
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JAVA_SRC="${REPO}/apps/darkroom-android/android/java"
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JAVA_FILES=()
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if [[ -d "${JAVA_SRC}" ]]; then
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mapfile -t JAVA_FILES < <(find "${JAVA_SRC}" -name '*.java' | sort)
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fi
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if [[ ${#JAVA_FILES[@]} -gt 0 ]]; then
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echo "==> compiling ${#JAVA_FILES[@]} Java source(s)"
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mkdir -p "${OUT}/classes" "${OUT}/dex"
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# `-source 8 -target 8` with an explicit `-bootclasspath`, because that is
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# the last combination in which javac still lets the boot class path be
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# replaced: from `-target 9` onwards it rejects the flag outright, and the
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# platform classes then come from the *JDK* rather than from android.jar.
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# That compiles cleanly and fails on the device — a JDK class Android does
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# not ship raises NoClassDefFoundError the moment it is touched, with
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# nothing at build time having said so. Compiling against android.jar and
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# only android.jar is what makes "it compiled" mean "the device has it".
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#
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# `-Xlint:-options` silences one note, "source value 8 is obsolete", which
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# is advice about a future JDK rather than about this code. The JDK is
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# pinned in the Dockerfile, so the day it matters is a deliberate bump.
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#
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# `-encoding UTF-8` because javac otherwise reads sources in the *platform*
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# encoding, and the container sets no locale, so that is US-ASCII. Every
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# curly quote and em dash in a comment then becomes "unmappable character
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# (0x94)" — 55 errors from prose, in a file whose code is fine. The sources
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# are UTF-8 like everything else in the repo; this says so rather than
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# asking the prose to be typed in ASCII.
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javac \
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-source 8 -target 8 \
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-encoding UTF-8 \
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-bootclasspath "${ANDROID_JAR}" \
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-classpath "${ANDROID_JAR}" \
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-Xlint:-options \
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-d "${OUT}/classes" \
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"${JAVA_FILES[@]}"
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mapfile -t CLASS_FILES < <(find "${OUT}/classes" -name '*.class' | sort)
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# d8 merges, it does not only translate. Handing it Slint's finished
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# classes.dex alongside our fresh .class files yields one dex holding both,
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# which is what the zip step below already expects. The alternative — ours
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# as a second classes2.dex — works at API 28, where multidex is native, but
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# leaves two files to keep in step in the staging and zip steps for no gain
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# at this size.
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#
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# `--min-api` is MIN_API for the same reason the linkers use it: d8 decides
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# what it must desugar from the oldest device this APK may reach, and a
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# higher number here emits bytecode that verifies against the build
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# machine's idea of Android and not against that device's.
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#
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# `--lib` is android.jar rather than a copy of the classpath: desugaring
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# needs to see the platform types it is desugaring against, and without it
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# d8 reports missing classes for anything our code touches.
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"${BT}/d8" \
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--release \
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--min-api "${MIN_API}" \
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--lib "${ANDROID_JAR}" \
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--output "${OUT}/dex" \
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"${DEX}" \
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"${CLASS_FILES[@]}"
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DEX="${OUT}/dex/classes.dex"
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echo " dex: ${DEX} (ours merged with Slint's)"
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fi
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# A debug keystore. CI points KEYSTORE at a throwaway directory so nothing is
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# persisted or published; package.sh keeps one in the cache on purpose, because
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# Android refuses to update an installed app whose signature changed and a new
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# key every build would mean uninstalling before every install.
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#
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# Debug-signed only. This gets the app onto a test device; it is not a release
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# signature, and the store password is the Android convention rather than a
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# secret worth protecting.
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if [[ "${SIGNING}" == "release" ]]; then
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# Never generated on demand. A release key is created once, by hand, and
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# kept; conjuring one here would mean every build signed by a different
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# identity, which is indistinguishable from having no signing story at all.
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[[ -f "${KEYSTORE}" ]] || {
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echo "error: KEYSTORE_PASS is set but ${KEYSTORE} does not exist" >&2
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exit 1
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}
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echo " signing with the release key (alias ${KEY_ALIAS})"
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elif [[ ! -f "${KEYSTORE}" ]]; then
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echo " generating debug keystore"
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mkdir -p "$(dirname "${KEYSTORE}")"
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keytool -genkeypair -keystore "${KEYSTORE}" -alias "${KEY_ALIAS}" \
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-storepass:env DR_KS_PASS -keypass:env DR_KEY_PASS \
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-keyalg RSA -keysize 2048 -validity 10950 \
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-dname "CN=Android Debug,O=Android,C=US" >/dev/null 2>&1
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fi
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# The launcher icon is the only resource the app has, but resources go through
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# aapt2 in two steps regardless: compile turns the source tree into an
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# intermediate archive of flat files, link folds that into the APK and builds
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# the resources.arsc table that @mipmap/ic_launcher in the manifest resolves
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# against. Skipping compile and handing link the directory does not work — link
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# only reads compiled input.
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"${BT}/aapt2" compile \
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--dir "${REPO}/apps/darkroom-android/android/res" \
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-o "${OUT}/res.zip"
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# `android:debuggable`, when asked for, and never otherwise.
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#
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# Without it `adb shell run-as` refuses — "package not debuggable" — and the
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# app's own storage cannot be looked at from the host at all. That storage is
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# where the face shards, the thumbnail store and the catalog live, so when a
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# device disagrees with the desktop about what it has synced, there is no way
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# to find out which of them is wrong.
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#
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# Set through aapt2 rather than in `AndroidManifest.xml` deliberately: the flag
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# then exists only for the build that opted in, and a release build cannot
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# inherit it by someone forgetting to take it back out again. A debuggable APK
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# lets any process on the device read this app's private files, so it is a
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# thing to install on a test tablet and not a thing to publish.
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DEBUG_FLAG=()
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if [ -n "${DARKROOM_DEBUGGABLE:-}" ]; then
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echo "==> debuggable build (run-as enabled; do not publish)"
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DEBUG_FLAG=(--debug-mode)
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fi
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"${BT}/aapt2" link \
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-I "${ANDROID_JAR}" \
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--manifest "${REPO}/apps/darkroom-android/android/AndroidManifest.xml" \
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-R "${OUT}/res.zip" \
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--min-sdk-version "${MIN_API}" \
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--target-sdk-version "${TARGET_API}" \
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--version-name "${VERSION_NAME}" \
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--version-code "${VERSION_CODE}" \
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"${DEBUG_FLAG[@]}" \
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-o "${OUT}/base.apk" \
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--auto-add-overlay
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cp "${SO}" "${OUT}/staging/lib/${ABI}/libdarkroom.so"
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cp "${DEX}" "${OUT}/staging/classes.dex"
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# The face models. Android has no other route to one — app-private storage is
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# not user-reachable and the in-app fetch is unbuilt (docs/faces.md §2.2a) — so
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# they go in the APK and `android_main` unpacks them on first launch. The
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# source is `models/face/`, shared with the Arch package rather than living
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# under this one platform's directory.
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#
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# Through the staging directory rather than aapt2's `-A`: the .so and the dex
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# already go in with `zip` below, and one mechanism for "extra files in the
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# APK" is easier to follow than two.
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ASSETS="${REPO}/models/face"
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# Cleared first: a previous run that died between staging and cleanup would
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# otherwise leave models in the APK that are no longer in the tree.
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rm -rf "${OUT}/staging/assets"
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if compgen -G "${ASSETS}/*.onnx" >/dev/null; then
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# An LFS pointer is ~130 bytes and looks exactly like a model to `cp`. Left
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# unchecked it reaches the device and fails inside tract, which reports a
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# broken graph rather than a clone that needs `git lfs pull`. Same guard
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# dr-segment's build script applies to yolo26n-seg.onnx, and the same
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# reason.
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for m in "${ASSETS}"/*.onnx; do
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if [[ "$(stat -c%s "${m}")" -lt 100000 ]]; then
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echo "error: $(basename "${m}") is $(stat -c%s "${m}") bytes — an LFS pointer, not a model." >&2
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echo " run: git lfs pull" >&2
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exit 1
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fi
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done
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mkdir -p "${OUT}/staging/assets/models"
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cp "${ASSETS}"/*.onnx "${OUT}/staging/assets/models/"
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echo " assets: $(ls "${ASSETS}" | grep '\.onnx$' | tr '\n' ' ')"
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else
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echo " assets: no face models found (face indexing will be off on the device)"
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fi
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# -0 "" stores the .so without compression so Android can mmap it directly
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# (extractNativeLibs=false territory); for a 37 MB library that also keeps
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# install times sane.
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cd "${OUT}/staging"
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cp "${OUT}/base.apk" "${OUT}/unaligned.apk"
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zip -q -0 -X "${OUT}/unaligned.apk" "lib/${ABI}/libdarkroom.so"
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zip -q -X "${OUT}/unaligned.apk" classes.dex
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# Stored, not deflated: an ONNX graph is mostly incompressible float data, so
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# deflating it buys a few percent and costs the whole file being inflated into
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# RAM on the way out. AAssetManager reads a stored entry straight from the
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# mapped APK.
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if [[ -d assets ]]; then
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zip -q -0 -X -r "${OUT}/unaligned.apk" assets
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fi
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# zipalign before signing: apksigner preserves alignment, the reverse order
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# invalidates the signature.
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"${BT}/zipalign" -p -f 4 "${OUT}/unaligned.apk" "${OUT}/darkroom.apk"
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"${BT}/apksigner" sign \
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--ks "${KEYSTORE}" --ks-key-alias "${KEY_ALIAS}" \
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--ks-pass env:DR_KS_PASS --key-pass env:DR_KEY_PASS \
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--min-sdk-version "${MIN_API}" \
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"${OUT}/darkroom.apk"
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"${BT}/apksigner" verify --print-certs "${OUT}/darkroom.apk" | head -2
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echo " signing: ${SIGNING}"
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# The intermediates are not the artefact, and leaving them beside it invites
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# the wrong file being picked up by a glob.
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rm -rf "${OUT}/staging" "${OUT}/res.zip" "${OUT}/base.apk" "${OUT}/unaligned.apk" \
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"${OUT}/classes" "${OUT}/dex"
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echo "==> ${OUT}/darkroom.apk"
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ls -la "${OUT}/darkroom.apk"
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