Handle errors from DirectoryListingFunction

SkyFunctions that call DirectoryListingFunction directly, as in the
case of RecursiveDirectoryTraversalFunction, or transitively, as in
the case of IncludeParser's call to GlobFunction, had been failing
to handle the exceptions that DirectoryListingFunction can throw.

DirectoryListingFunction can throw InconsistentFilesystemException
directly, but it can also throw IOException and
FileOutsidePackageRootsException because of its call to
DirectoryListingStateFunction without any of its own error handling.

RecursiveFilesystemTraversalFunction also calls
DirectoryListingFunction, but is not yet in use. A follow-up CL will
take care of its error handling needs.

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README.md

Bazel (Alpha)

{Fast, Correct} - Choose two

Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google‘s software, and thus it has been designed to handle build problems present in Google’s development environment, including:

  • A massive, shared code repository, in which all software is built from source. Bazel has been built for speed, using both caching and parallelism to achieve this. Bazel is critical to Google's ability to continue to scale its software development practices as the company grows.

  • An emphasis on automated testing and releases. Bazel has been built for correctness and reproducibility, meaning that a build performed on a continuous build machine or in a release pipeline will generate bitwise-identical outputs to those generated on a developer's machine.

  • Language and platform diversity. Bazel's architecture is general enough to support many different programming languages within Google, and can be used to build both client and server software targeting multiple architectures from the same underlying codebase.

Find more background about Bazel in our FAQ.

Getting Started

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