Skip empty directories instead of throwing in prefetcher. #17183
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. Thus, the check added in 763f966 is incorrect. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle.
coeuvre
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coeuvre
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| // Source artifacts don't need to be fetched. | ||
| if (input instanceof Artifact && ((Artifact) input).isSourceArtifact()) { | ||
| continue; | ||
| } | ||
|
|
||
| // Skip empty tree artifacts (non-empty tree artifacts should have already been expanded). | ||
| if (input.isDirectory()) { | ||
| continue; |
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Do we want to check whether the directory is actually empty?
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Unfortunately, the FileArtifactValue returned by MetadataHandler#getMetadata for a tree artifact doesn't provide enough information to do the check in a clean way, and I'd rather not add API surface just for it.
I wonder if we could do this in a more principled way, by having the ArtifactExpander produce a special ActionInput that signals "this is root directory for an empty tree artifact"? But that's clearly for a separate PR.
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I started working on that in https://github.com/bazelbuild/bazel/pull/16015/files. If you are also interested in this, we could continue the discussion there.
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. Thus, the check added in 763f966 is incorrect. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle. Closes #17183. PiperOrigin-RevId: 501207095 Change-Id: Ib52727d6fdc6b7a291a61fba33914e57531fb1f4
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle. Closes bazelbuild#17183. [NOTE: this is a combined cherry pick of 763f966 and 4c57def, as the former left Bazel in a broken state.] PiperOrigin-RevId: 501207095 Change-Id: Ib52727d6fdc6b7a291a61fba33914e57531fb1f4
ShreeM01
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle. Closes #17183. [NOTE: this is a combined cherry pick of 763f966 and 4c57def, as the former left Bazel in a broken state.] PiperOrigin-RevId: 501207095 Change-Id: Ib52727d6fdc6b7a291a61fba33914e57531fb1f4
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@bazel-io fork 6.2.0 |
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. Thus, the check added in 763f966 is incorrect. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle. Closes bazelbuild#17183. PiperOrigin-RevId: 501207095 Change-Id: Ib52727d6fdc6b7a291a61fba33914e57531fb1f4
ShreeM01
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. Thus, the check added in 763f966 is incorrect. I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle. Closes #17183. PiperOrigin-RevId: 501207095 Change-Id: Ib52727d6fdc6b7a291a61fba33914e57531fb1f4 Co-authored-by: Tiago Quelhas <[email protected]>
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While non-empty tree artifacts in the inputs to an action are expanded into the files they contain and omitted from the input mapping, empty tree artifacts are still present, as they signal the need to create the directory. Thus, the check added in 763f966 is incorrect.
I'm explicitly skipping the empty tree artifacts in prefetchFiles() as otherwise they get skipped as a result of FileArtifactValue#isRemote() returning false for the FileArtifactValue associated with an empty tree artifact (even if it was produced remotely!), which is extremely subtle.