def _perform_bisect(attrname, nix_file, to_pick, max_rebuilds, failure_line):
for rev in to_pick:
git.try_cherry_pick_all(rev)
drv = nix.instantiate(attrname, nix_file)
print(f"Instantiated {drv}.")
num_rebuilds = len(nix.build_dry([drv])[0])
if num_rebuilds == 0:
return "good"
if max_rebuilds is not None:
if num_rebuilds > max_rebuilds:
print(
f"Need to rebuild {num_rebuilds} derivations, which exceeds the maximum."
)
return "skip rebuild_count"
try:
nix.build(nix.dependencies([drv]))
except nix.BuildFailure as failure:
failed_drvs = failure.drvs_failed
print(f"Dependencies {failed_drvs} failed to build.")
return f"skip dependency_failure"
if failure_line is not None:
result = nix.log_contains(drv, failure_line)
if result == "yes":
print("Failure line detected.")
return "bad"
elif result == "no_success":
print("Build success.")
return "good"
elif result == "no_fail":
print("Failure without failure line.")
return "skip unknown_build_failure"
else:
raise Exception()
else:
if nix.build_would_succeed([drv]):
print("Build success.")
return "good"
else:
print("Build failure.")
return "bad"
def _single_run(self, bisect_fun):
patchset = read_patchset()
with git.git_checkpoint():
one_patch_succeeded = False
for (i, rev) in enumerate(patchset):
success = git.try_cherry_pick_all(rev)
one_patch_succeeded = success or one_patch_succeeded
if not one_patch_succeeded:
remaining_patchset = patchset[i + 1 :]
for skip_range in get_skip_ranges(remaining_patchset):
if within_range(
"HEAD", get_named_skip_refs(skip_range, remaining_patchset)
):
print(
f"Commit with remaining patches matches known skip range {skip_range}."
)
return f"skip {skip_range}"
return bisect_fun()
def pick(rev):
success = git.try_cherry_pick_all(rev)
if not success:
raise EnvSetupFailedException("Cherry-pick failed")