Separate snapshot definition
Current snapshot definition is located in the CC module, so it is
difficult to capture non-CC module (such as prebuilt_etc) to the
snapshot. Separate general snapshot definition from cc so other modules
can also define its own snapshot.
Bug: 192430376
Test: m nothing passed
Change-Id: Ifb69fb3d2ec555b629aa31ec03e7ce5831fd3063
diff --git a/snapshot/snapshot.go b/snapshot/snapshot.go
new file mode 100644
index 0000000..294f8b6
--- /dev/null
+++ b/snapshot/snapshot.go
@@ -0,0 +1,122 @@
+// Copyright 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package snapshot
+
+import (
+ "path/filepath"
+ "sort"
+
+ "android/soong/android"
+)
+
+// This file contains singletons to capture snapshots. This singleton will generate snapshot of each target
+// image, and capturing snapshot module will be delegated to each module which implements GenerateSnapshotAction
+// function and register with RegisterSnapshotAction.
+
+var pctx = android.NewPackageContext("android/soong/snapshot")
+
+type SnapshotSingleton struct {
+ // Name, e.g., "vendor", "recovery", "ramdisk".
+ name string
+
+ // Make variable that points to the snapshot file, e.g.,
+ // "SOONG_RECOVERY_SNAPSHOT_ZIP".
+ makeVar string
+
+ // Path to the snapshot zip file.
+ snapshotZipFile android.OptionalPath
+
+ // Implementation of the image interface specific to the image
+ // associated with this snapshot (e.g., specific to the vendor image,
+ // recovery image, etc.).
+ Image SnapshotImage
+
+ // Whether this singleton is for fake snapshot or not.
+ // Fake snapshot is a snapshot whose prebuilt binaries and headers are empty.
+ // It is much faster to generate, and can be used to inspect dependencies.
+ Fake bool
+}
+
+// Interface of function to capture snapshot from each module
+type GenerateSnapshotAction func(snapshot SnapshotSingleton, ctx android.SingletonContext, snapshotArchDir string) android.Paths
+
+var snapshotActionList []GenerateSnapshotAction
+
+// Register GenerateSnapshotAction function so it can be called while generating snapshot
+func RegisterSnapshotAction(x GenerateSnapshotAction) {
+ snapshotActionList = append(snapshotActionList, x)
+}
+
+func (c *SnapshotSingleton) GenerateBuildActions(ctx android.SingletonContext) {
+ if !c.Image.shouldGenerateSnapshot(ctx) {
+ return
+ }
+
+ var snapshotOutputs android.Paths
+
+ // Snapshot zipped artifacts will be captured under {SNAPSHOT_ARCH} directory
+
+ snapshotDir := c.name + "-snapshot"
+ if c.Fake {
+ // If this is a fake snapshot singleton, place all files under fake/ subdirectory to avoid
+ // collision with real snapshot files
+ snapshotDir = filepath.Join("fake", snapshotDir)
+ }
+ snapshotArchDir := filepath.Join(snapshotDir, ctx.DeviceConfig().DeviceArch())
+
+ for _, f := range snapshotActionList {
+ snapshotOutputs = append(snapshotOutputs, f(*c, ctx, snapshotArchDir)...)
+ }
+
+ // All artifacts are ready. Sort them to normalize ninja and then zip.
+ sort.Slice(snapshotOutputs, func(i, j int) bool {
+ return snapshotOutputs[i].String() < snapshotOutputs[j].String()
+ })
+
+ zipPath := android.PathForOutput(
+ ctx,
+ snapshotDir,
+ c.name+"-"+ctx.Config().DeviceName()+".zip")
+ zipRule := android.NewRuleBuilder(pctx, ctx)
+
+ // filenames in rspfile from FlagWithRspFileInputList might be single-quoted. Remove it with tr
+ snapshotOutputList := android.PathForOutput(
+ ctx,
+ snapshotDir,
+ c.name+"-"+ctx.Config().DeviceName()+"_list")
+ rspFile := snapshotOutputList.ReplaceExtension(ctx, "rsp")
+ zipRule.Command().
+ Text("tr").
+ FlagWithArg("-d ", "\\'").
+ FlagWithRspFileInputList("< ", rspFile, snapshotOutputs).
+ FlagWithOutput("> ", snapshotOutputList)
+
+ zipRule.Temporary(snapshotOutputList)
+
+ zipRule.Command().
+ BuiltTool("soong_zip").
+ FlagWithOutput("-o ", zipPath).
+ FlagWithArg("-C ", android.PathForOutput(ctx, snapshotDir).String()).
+ FlagWithInput("-l ", snapshotOutputList)
+
+ zipRule.Build(zipPath.String(), c.name+" snapshot "+zipPath.String())
+ zipRule.DeleteTemporaryFiles()
+ c.snapshotZipFile = android.OptionalPathForPath(zipPath)
+}
+
+func (c *SnapshotSingleton) MakeVars(ctx android.MakeVarsContext) {
+ ctx.Strict(
+ c.makeVar,
+ c.snapshotZipFile.String())
+}