diff --git a/src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionService.java b/src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionService.java index 6a5feb87901313..94abbaaefc6c67 100644 --- a/src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionService.java +++ b/src/main/java/com/google/devtools/build/lib/remote/RemoteExecutionService.java @@ -1013,6 +1013,13 @@ public InMemoryOutput downloadOutputs(RemoteAction action, RemoteActionResult re // Check that all mandatory outputs are created. for (ActionInput output : action.spawn.getOutputFiles()) { if (action.spawn.isMandatoryOutput(output)) { + // Don't check output that is tree artifact since spawn could generate nothing under that + // directory. Remote server typically doesn't create directory ahead of time resulting in + // empty tree artifact missing from action cache entry. + if (output instanceof Artifact && ((Artifact) output).isTreeArtifact()) { + continue; + } + Path localPath = execRoot.getRelative(output.getExecPath()); if (!metadata.files.containsKey(localPath) && !metadata.directories.containsKey(localPath) diff --git a/src/test/shell/bazel/remote/remote_execution_test.sh b/src/test/shell/bazel/remote/remote_execution_test.sh index b70c2772ce8e84..42b1269f9bb144 100755 --- a/src/test/shell/bazel/remote/remote_execution_test.sh +++ b/src/test/shell/bazel/remote/remote_execution_test.sh @@ -966,6 +966,63 @@ EOF || fail "Failed to run //a:starlark_output_dir_test with remote execution" } +function generate_empty_treeartifact_build() { + mkdir -p a + cat > a/BUILD <<'EOF' +load(":output_dir.bzl", "gen_output_dir") +gen_output_dir( + name = "output-dir", + outdir = "dir", +) +EOF + cat > a/output_dir.bzl <<'EOF' +def _gen_output_dir_impl(ctx): + output_dir = ctx.actions.declare_directory(ctx.attr.outdir) + ctx.actions.run_shell( + outputs = [output_dir], + inputs = [], + command = "", + arguments = [output_dir.path], + ) + return [ + DefaultInfo(files = depset(direct = [output_dir])), + ] + +gen_output_dir = rule( + implementation = _gen_output_dir_impl, + attrs = { + "outdir": attr.string(mandatory = True), + }, +) +EOF +} + +function test_empty_treeartifact_works_with_remote_execution() { + # Test that empty tree artifact works with remote execution + generate_empty_treeartifact_build + + bazel build \ + --remote_executor=grpc://localhost:${worker_port} \ + //a:output-dir >& $TEST_log || fail "Failed to build" +} + +function test_empty_treeartifact_works_with_remote_cache() { + # Test that empty tree artifact works with remote cache + generate_empty_treeartifact_build + + bazel build \ + --remote_cache=grpc://localhost:${worker_port} \ + //a:output-dir >& $TEST_log || fail "Failed to build" + + bazel clean + + bazel build \ + --remote_cache=grpc://localhost:${worker_port} \ + //a:output-dir >& $TEST_log || fail "Failed to build" + + expect_log "remote cache hit" +} + function test_downloads_minimal() { # Test that genrule outputs are not downloaded when using # --remote_download_minimal