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fix(ci): pre-install Android SDK components in container layer

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Cache volumes for NDK/CMake proved unreliable on the remote Dagger
engine: the android-ndk-cache volume was empty on each run, causing
Gradle to re-download NDK + CMake + build-tools + platform during every
`flutter build appbundle` (~3-4 min of extra downloads).

Pre-install all four SDK components via sdkmanager in Base() so Dagger's
execution cache captures them. Base() is CACHED on subsequent runs with
identical inputs, eliminating the per-run SDK downloads.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Thomas SharedInbox
2026-05-19 11:35:44 +02:00
co-authored by Claude Sonnet 4.6
parent 75a7b947cd
commit 354f7959f6
1 changed files with 5 additions and 3 deletions
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ci/main.go
+5 -3
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@@ -175,7 +175,10 @@ func New(
}
// Base is the Flutter toolchain container with no source mounted.
// Its cache key is stable until the image or apt packages change.
// Its cache key is stable until the image, apt packages, or SDK component versions change.
// Android SDK components (NDK, CMake, build-tools, platform) are installed into the container
// layer here so Dagger's execution cache captures them — cache volumes proved unreliable across
// pipeline runs on the remote engine and caused Gradle to re-download ~3 min of SDKs every time.
func (m *Ci) Base() *dagger.Container {
return dag.Container().
From("ghcr.io/cirruslabs/flutter:3.41.6").
@@ -183,9 +186,8 @@ func (m *Ci) Base() *dagger.Container {
WithExec([]string{"apt-get", "install", "-y", "clang", "cmake", "ninja-build", "pkg-config", "libgtk-3-dev", "liblzma-dev", "libsecret-1-dev", "libgcrypt20-dev", "libjsoncpp-dev", "sqlite3", "iproute2", "netcat-openbsd", "xvfb", "libosmesa6", "libegl1", "lld"}).
WithMountedCache("/root/.pub-cache", dag.CacheVolume("flutter-pub-cache")).
WithMountedCache("/root/.gradle", dag.CacheVolume("gradle-cache")).
WithMountedCache("/opt/android-sdk-linux/ndk", dag.CacheVolume("android-ndk-cache")).
WithEnvVariable("PUB_CACHE", "/root/.pub-cache").
WithExec([]string{"/bin/sh", "-c", "if [ ! -d /opt/android-sdk-linux/ndk/28.2.13676358 ]; then yes | sdkmanager \"ndk;28.2.13676358\"; fi"})
WithExec([]string{"/bin/sh", "-c", `yes | sdkmanager "ndk;28.2.13676358" "cmake;3.22.1" "build-tools;35.0.0" "platforms;android-34"`})
}
// setup mounts a source directory into Base and runs pub get + build_runner.