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fix(ci): remove pub cache volume from Base() and pubGetLayer()

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The mutable flutter-pub-cache volume made the execution cache key unstable —
pub get cache-missed every run because the volume's mutable layer changed the
snapshot hash.  Removing the volume lets Dagger snapshot packages inside the
execution-cache layer, which is stable and reclaimable via dagger prune.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Thomas SharedInbox
2026-05-23 10:11:08 +02:00
co-authored by Claude Sonnet 4.6
parent 8a4ca223e9
commit 6cfc3dfda4
1 changed files with 3 additions and 7 deletions
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ci/main.go
+3 -7
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@@ -199,12 +199,9 @@ func (m *Ci) toolchain() *dagger.Container {
}
// Base is the Flutter toolchain container with mutable cache mounts attached.
// Use for Android/Gradle builds that need the pub and Gradle caches.
// Do NOT use as the base for pubGetLayer — the mutable pub cache volume makes
// flutter pub get's execution cache key unstable, causing a cache miss every run.
// Use for Android/Gradle builds that need the Gradle cache.
func (m *Ci) Base() *dagger.Container {
return m.toolchain().
WithMountedCache("/home/ci/.pub-cache", dag.CacheVolume("flutter-pub-cache"), dagger.ContainerWithMountedCacheOpts{Owner: "ci"}).
WithMountedCache("/home/ci/.gradle", dag.CacheVolume("gradle-cache"), dagger.ContainerWithMountedCacheOpts{Owner: "ci"})
}
@@ -212,14 +209,13 @@ func (m *Ci) Base() *dagger.Container {
// inputs, then removes non-deterministic fields from both package_config.json
// and .flutter-plugins-dependencies so the snapshot is byte-for-byte stable
// across runs. Re-executes only when pubspec.yaml or pubspec.lock changes.
// The pub cache is stored in a volume so package downloads land in the named
// volume rather than the container overlay (which has limited space).
// Packages land in the execution-cache snapshot (not a named volume) so that
// dagger prune can reclaim space from stale pubspec.lock snapshots.
func (m *Ci) pubGetLayer() *dagger.Container {
pubspecOnly := m.Source.Filter(dagger.DirectoryFilterOpts{
Include: []string{"pubspec.yaml", "pubspec.lock"},
})
return m.toolchain().
WithMountedCache("/home/ci/.pub-cache", dag.CacheVolume("flutter-pub-cache"), dagger.ContainerWithMountedCacheOpts{Owner: "ci"}).
WithMountedCache("/home/ci/.gradle", dag.CacheVolume("gradle-cache"), dagger.ContainerWithMountedCacheOpts{Owner: "ci"}).
WithDirectory("/src", pubspecOnly, dagger.ContainerWithDirectoryOpts{Owner: "ci"}).
WithWorkdir("/src").