How to use the libmozdata.phabricator.BuildState.Fail function in libmozdata

)
        stats.add_metric("analysis.issues.publishable", nb_publishable)

        # Publish reports about these issues
        with stats.timer("runtime.reports"):
            for reporter in self.reporters.values():
                reporter.publish(issues, revision, task_failures)

        self.index(
            revision, state="done", issues=nb_issues, issues_publishable=nb_publishable
        )

        # Publish final HarborMaster state
        self.update_status(
            revision,
            BuildState.Fail if nb_publishable > 0 or task_failures else BuildState.Pass,
        )

)
        stats.add_metric("analysis.issues.publishable", nb_publishable)

        # Publish reports about these issues
        with stats.timer("runtime.reports"):
            for reporter in self.reporters.values():
                reporter.publish(issues, revision, task_failures)

        self.index(
            revision, state="done", issues=nb_issues, issues_publishable=nb_publishable
        )

        # Publish final HarborMaster state
        self.update_status(
            revision,
            BuildState.Fail if nb_publishable > 0 or task_failures else BuildState.Pass,
        )

w.ingest_autoland(revision)
        else:
            w.run(revision)
    except Exception as e:
        # Log errors to papertrail
        logger.error("Static analysis failure", revision=revision, error=e)

        # Index analysis state
        extras = {}
        if isinstance(e, AnalysisException):
            extras["error_code"] = e.code
            extras["error_message"] = str(e)
        w.index(revision, state="error", **extras)

        # Update Harbormaster status
        w.update_status(revision, state=BuildState.Fail)

        # Then raise to mark task as erroneous
        raise

    return 0

w.ingest_autoland(revision)
        else:
            w.run(revision)
    except Exception as e:
        # Log errors to papertrail
        logger.error("Static analysis failure", revision=revision, error=e)

        # Index analysis state
        extras = {}
        if isinstance(e, AnalysisException):
            extras["error_code"] = e.code
            extras["error_message"] = str(e)
        w.index(revision, state="error", **extras)

        # Update Harbormaster status
        w.update_status(revision, state=BuildState.Fail)

        # Then raise to mark task as erroneous
        raise

    return 0

mode, build, extras = payload
        logger.debug("Publishing a Phabricator build update", mode=mode, build=build)

        if mode == "fail:general":
            failure = UnitResult(
                namespace="code-review",
                name="general",
                result=UnitResultState.Broken,
                details="WARNING: An error occurred in the code review bot.\n\n```{}```".format(
                    extras["message"]
                ),
                format="remarkup",
                duration=extras.get("duration", 0),
            )
            self.api.update_build_target(
                build.target_phid, BuildState.Fail, unit=[failure]
            )

        elif mode == "fail:mercurial":
            failure = UnitResult(
                namespace="code-review",
                name="mercurial",
                result=UnitResultState.Fail,
                details="WARNING: The code review bot failed to apply your patch.\n\n```{}```".format(
                    extras["message"]
                ),
                format="remarkup",
                duration=extras.get("duration", 0),
            )
            self.api.update_build_target(
                build.target_phid, BuildState.Fail, unit=[failure]
            )

build.target_phid, BuildState.Fail, unit=[failure]
            )

        elif mode == "fail:mercurial":
            failure = UnitResult(
                namespace="code-review",
                name="mercurial",
                result=UnitResultState.Fail,
                details="WARNING: The code review bot failed to apply your patch.\n\n```{}```".format(
                    extras["message"]
                ),
                format="remarkup",
                duration=extras.get("duration", 0),
            )
            self.api.update_build_target(
                build.target_phid, BuildState.Fail, unit=[failure]
            )

        elif mode == "test_result":
            result = UnitResult(
                namespace="code-review",
                name=extras["name"],
                result=extras["result"],
                details=extras["details"],
            )
            self.api.update_build_target(
                build.target_phid, BuildState.Work, unit=[result]
            )

        elif mode == "success":
            self.api.create_harbormaster_uri(
                build.target_phid,