mirror of
https://github.com/bazelbuild/rules_cc
synced 2024-11-27 20:43:26 +00:00
30e32836fa
https://github.com/bazelbuild/bazel/issues/5883 RELNOTES: None. PiperOrigin-RevId: 227827560
70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
"""Script migrating legacy CROSSTOOL fields into features.
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This script migrates the CROSSTOOL to use only the features to describe C++
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command lines. It is intended to be added as a last step of CROSSTOOL generation
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pipeline. Since it doesn't retain comments, we assume CROSSTOOL owners will want
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to migrate their pipeline manually.
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"""
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# Tracking issue: https://github.com/bazelbuild/bazel/issues/5187
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#
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# Since C++ rules team is working on migrating CROSSTOOL from text proto into
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# Starlark, we advise CROSSTOOL owners to wait for the CROSSTOOL -> Starlark
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# migrator before they invest too much time into fixing their pipeline. Tracking
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# issue for the Starlark effort is
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# https://github.com/bazelbuild/bazel/issues/5380.
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from absl import app
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from absl import flags
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from google.protobuf import text_format
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from third_party.com.github.bazelbuild.bazel.src.main.protobuf import crosstool_config_pb2
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from tools.migration.legacy_fields_migration_lib import migrate_legacy_fields
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import os
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flags.DEFINE_string("input", None, "Input CROSSTOOL file to be migrated")
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flags.DEFINE_string("output", None,
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"Output path where to write migrated CROSSTOOL.")
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flags.DEFINE_boolean("inline", None, "Overwrite --input file")
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def main(unused_argv):
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crosstool = crosstool_config_pb2.CrosstoolRelease()
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input_filename = flags.FLAGS.input
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output_filename = flags.FLAGS.output
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inline = flags.FLAGS.inline
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if not input_filename:
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raise app.UsageError("ERROR --input unspecified")
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if not output_filename and not inline:
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raise app.UsageError("ERROR --output unspecified and --inline not passed")
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if output_filename and inline:
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raise app.UsageError("ERROR both --output and --inline passed")
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with open(to_absolute_path(input_filename), "r") as f:
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input_text = f.read()
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text_format.Merge(input_text, crosstool)
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migrate_legacy_fields(crosstool)
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output_text = text_format.MessageToString(crosstool)
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resolved_output_filename = to_absolute_path(
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input_filename if inline else output_filename)
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with open(resolved_output_filename, "w") as f:
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f.write(output_text)
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def to_absolute_path(path):
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path = os.path.expanduser(path)
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if os.path.isabs(path):
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return path
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else:
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if "BUILD_WORKING_DIRECTORY" in os.environ:
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return os.path.join(os.environ["BUILD_WORKING_DIRECTORY"], path)
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else:
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return path
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if __name__ == "__main__":
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app.run(main)
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