| """ Helpers to parse and check version of bazel.""" |
| |
| def extract_version_number(bazel_version_fallback): |
| """Extracts the semantic version number from a version string |
| |
| Args: |
| bazel_version: the version string that begins with the semantic version |
| e.g. "1.2.3rc1 abc1234" where "abc1234" is a commit hash. |
| |
| Returns: |
| The semantic version string, like "1.2.3". |
| """ |
| bazel_version = _check_bazel_version(bazel_version_fallback) |
| for i in range(len(bazel_version)): |
| c = bazel_version[i] |
| if not (c.isdigit() or c == "."): |
| return bazel_version[:i] |
| return bazel_version |
| |
| def parse_rc(bazel_version): |
| if bazel_version.find("rc") != -1: |
| rc = "" |
| for i in range(len(bazel_version) - bazel_version.find("rc") - 2): |
| c = bazel_version[i + bazel_version.find("rc") + 2] |
| if not c.isdigit(): |
| if rc == "": |
| return -1 |
| break |
| rc += c |
| return int(rc) |
| |
| def _check_bazel_version(bazel_version_fallback): |
| if "bazel_version" not in dir(native): |
| fail("\nCurrent Bazel version is lower than 0.2.1 and is not supported with rbe_autoconfig.") |
| elif not native.bazel_version: |
| print(("\nCurrent running Bazel is not a release version and one " + |
| "was not defined explicitly in rbe_autoconfig target. " + |
| "Falling back to '%s'") % bazel_version_fallback) |
| return bazel_version_fallback |
| return native.bazel_version |
