44 class Rev(t.NamedTuple("Rev", (("branch", str), ("number", int)))):  class
48     def parse(rev: str) -> "Rev":
49         """Parses a Rev from the given string.
58         if rev.startswith("r"):
60             rev_string = rev[1:]
62             match = re.match(r"\((.+), r(\d+)\)", rev)
64                 raise ValueError("%r isn't a valid revision" % rev)
68         return Rev(branch=branch_name, number=int(rev_string))
121 def translate_sha_to_rev(llvm_config: LLVMConfig, sha_or_ref: str) -> Rev:
122     """Translates a sha or git ref to a Rev."""
128             ["git", "rev-parse", sha_or_ref],
143                 "rev-list",
151         return Rev(branch=MAIN_BRANCH, number=count + base_llvm_revision)
161         return Rev(branch=MAIN_BRANCH, number=merge_base_number)
166             "rev-list",
204     return Rev(branch=candidates[0], number=revision_number)
246 def translate_prebase_rev_to_sha(llvm_config: LLVMConfig, rev: Rev) -> str:  argument
247     """Translates a Rev to a SHA.
249     This function assumes that the given rev refers to a commit that's an
255     looking_for = f"llvm-svn: {rev.number}"
283     raise ValueError(f"No commit with revision {rev} found")
286 def translate_rev_to_sha(llvm_config: LLVMConfig, rev: Rev) -> str:  argument
287     """Translates a Rev to a SHA.
289     Raises a ValueError if the given Rev doesn't exist in the given config.
291     branch, number = rev
295             return translate_prebase_rev_to_sha(llvm_config, rev)
317     # about rev walking/counting locally compared to long |log|s, so we walk back
320         ["git", "rev-parse", f"{llvm_config.remote}/{branch}"],
329             "rev-list",
341             f"Revision {rev} is past {llvm_config.remote}/{branch}. Try updating "
346         ["git", "rev-parse", f"{branch_head_sha}~{commits_behind_head}"],
359         ["git", "rev-parse", "--show-toplevel"],
379         "--sha", help="A git SHA (or ref) to convert to a rev"
381     sha_or_rev.add_argument("--rev", help="A rev to convert into a sha")
399         rev = translate_sha_to_rev(config, opts.sha)
400         print(rev)
402         sha = translate_rev_to_sha(config, Rev.parse(opts.rev))