53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
""" Helpers to check minimum version of bazel."""
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def _extract_version_number(bazel_version):
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"""Extracts the semantic version number from a version string
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Args:
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bazel_version: the version string that begins with the semantic version
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e.g. "1.2.3rc1 abc1234" where "abc1234" is a commit hash.
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Returns:
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The semantic version string, like "1.2.3".
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"""
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for i in range(len(bazel_version)):
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c = bazel_version[i]
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if not (c.isdigit() or c == "."):
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return bazel_version[:i]
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return bazel_version
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# Parse the bazel version string from `native.bazel_version`.
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# e.g.
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# "0.10.0rc1 abc123d" => (0, 10, 0)
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# "0.3.0" => (0, 3, 0)
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def _parse_bazel_version(bazel_version):
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"""Parses a version string into a 3-tuple of ints
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int tuples can be compared directly using binary operators (<, >).
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Args:
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bazel_version: the Bazel version string
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Returns:
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An int 3-tuple of a (major, minor, patch) version.
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"""
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version = _extract_version_number(bazel_version)
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return tuple([int(n) for n in version.split(".")])
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def check_bazel_version_at_least(minimum_bazel_version):
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if "bazel_version" not in dir(native):
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fail("\nCurrent Bazel version is lower than 0.2.1, expected at least %s\n" % minimum_bazel_version)
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elif not native.bazel_version:
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print("\nCurrent Bazel is not a release version, cannot check for compatibility.")
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print("Make sure that you are running at least Bazel %s.\n" % minimum_bazel_version)
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return
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if _parse_bazel_version(native.bazel_version) < _parse_bazel_version(minimum_bazel_version):
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fail("\nCurrent Bazel version is {}, expected at least {}\n".format(
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native.bazel_version,
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minimum_bazel_version,
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))
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parse_bazel_version = _parse_bazel_version
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