From e9ae480a82b3d39856a2062ccefe25414001df54 Mon Sep 17 00:00:00 2001
From: Cole Faust <colefaust@google.com>
Date: Tue, 18 Jul 2023 19:36:41 -0700
Subject: [PATCH] Add workaround for a file with an mtime in the future

Bug: 291828210
Test: `m` repeatedly, and see ninja say there's no work to do on the second run
Change-Id: I0e1e5a82ebd25e9eec5daea90eb72db0ac085f34
---
 android/bazel_handler.go |  3 +++
 bazel/aquery.go          | 23 ++++++++++++++++++++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/android/bazel_handler.go b/android/bazel_handler.go
index 5d93f06b8..130336b2e 100644
--- a/android/bazel_handler.go
+++ b/android/bazel_handler.go
@@ -1336,6 +1336,9 @@ func createCommand(cmd *RuleBuilderCommand, buildStatement *bazel.BuildStatement
 	for _, outputPath := range buildStatement.OutputPaths {
 		cmd.ImplicitOutput(PathForBazelOut(ctx, outputPath))
 	}
+	for _, inputPath := range buildStatement.OrderOnlyInputs {
+		cmd.OrderOnly(PathForBazelOut(ctx, inputPath))
+	}
 	for _, inputPath := range buildStatement.InputPaths {
 		cmd.Implicit(PathForBazelOut(ctx, inputPath))
 	}
diff --git a/bazel/aquery.go b/bazel/aquery.go
index 480158c11..d4879b107 100644
--- a/bazel/aquery.go
+++ b/bazel/aquery.go
@@ -115,6 +115,7 @@ type BuildStatement struct {
 	// input path string, but not both.
 	InputDepsetHashes []string
 	InputPaths        []string
+	OrderOnlyInputs   []string
 	FileContents      string
 }
 
@@ -134,6 +135,8 @@ type aqueryArtifactHandler struct {
 	depsetHashToArtifactPathsCache sync.Map
 	// Maps artifact ids to fully expanded paths.
 	artifactIdToPath map[artifactId]string
+
+	extraBuildStatements []*BuildStatement
 }
 
 // The tokens should be substituted with the value specified here, instead of the
@@ -163,13 +166,29 @@ func newAqueryHandler(aqueryResult *analysis_v2_proto.ActionGraphContainer) (*aq
 		return pathFragmentId(pf.Id)
 	})
 
+	var extraBuildStatements []*BuildStatement
 	artifactIdToPath := make(map[artifactId]string, len(aqueryResult.Artifacts))
 	for _, artifact := range aqueryResult.Artifacts {
 		artifactPath, err := expandPathFragment(pathFragmentId(artifact.PathFragmentId), pathFragments)
 		if err != nil {
 			return nil, err
 		}
-		artifactIdToPath[artifactId(artifact.Id)] = artifactPath
+		if strings.HasSuffix(artifactPath, "DumpPlatformClassPath.java") {
+			// TODO(b/291828210): This is a workaround for the fact that DumpPlatformClassPath.java
+			// has a timestamp in 2033. We'll copy it to a new file using a order-only dep, so that
+			// the file is not recopied every build. Technically the order-only dep would produce
+			// incremental build issues if this was a regular file produced as part of the build,
+			// but this file is actually created by bazel during analysis, so it's not an issue.
+			outputPath := "hack_for_b291828210/DumpPlatformClassPath.java"
+			extraBuildStatements = append(extraBuildStatements, &BuildStatement{
+				Command:         fmt.Sprintf("cp %s %s", artifactPath, outputPath),
+				OutputPaths:     []string{outputPath},
+				OrderOnlyInputs: []string{artifactPath},
+			})
+			artifactIdToPath[artifactId(artifact.Id)] = outputPath
+		} else {
+			artifactIdToPath[artifactId(artifact.Id)] = artifactPath
+		}
 	}
 
 	// Map middleman artifact ContentHash to input artifact depset ID.
@@ -196,6 +215,7 @@ func newAqueryHandler(aqueryResult *analysis_v2_proto.ActionGraphContainer) (*aq
 		depsetHashToArtifactPathsCache: sync.Map{},
 		emptyDepsetIds:                 make(map[depsetId]struct{}, 0),
 		artifactIdToPath:               artifactIdToPath,
+		extraBuildStatements:           extraBuildStatements,
 	}
 
 	// Validate and adjust aqueryResult.DepSetOfFiles values.
@@ -369,6 +389,7 @@ func AqueryBuildStatements(aqueryJsonProto []byte, eventHandler *metrics.EventHa
 	if err != nil {
 		return nil, nil, err
 	}
+	buildStatements = append(buildStatements, aqueryHandler.extraBuildStatements...)
 
 	depsetsByHash := map[string]AqueryDepset{}
 	depsets := make([]AqueryDepset, 0, len(aqueryHandler.depsetIdToAqueryDepset))