private HealthReport getBuildStabilityHealthReport()

in core/src/main/java/hudson/model/Job.java [1237:1297]
51 lines of code
18 McCabe index (conditional complexity)

    private HealthReport getBuildStabilityHealthReport() {
        // we can give a simple view of build health from the last five builds
        int failCount = 0;
        int totalCount = 0;
        RunT i = getLastBuild();
        RunT u = getLastFailedBuild();
        if (i != null && u == null) {
                // no failures, like ever
                return new HealthReport(100, Messages._Job_BuildStability(Messages._Job_NoRecentBuildFailed()));
        }
        if (i != null && u.getNumber() <= i.getNumber()) {
            SortedMap<Integer, ? extends RunT> runs = _getRuns();
            if (runs instanceof RunMap) {
                RunMap<RunT> runMap = (RunMap<RunT>) runs;
                for (int index = i.getNumber(); index > u.getNumber() && totalCount < 5; index--) {
                    if (runMap.runExists(index)) {
                        totalCount++;
                    }
                }
                if (totalCount < 5) {
                    // start loading from the first failure as we counted the rest
                    i = u;
                }
            }
        }
        while (totalCount < 5 && i != null) {
            switch (i.getIconColor()) {
            case BLUE:
            case YELLOW:
                // failCount stays the same
                totalCount++;
                break;
            case RED:
                failCount++;
                totalCount++;
                break;

            default:
                // do nothing as these are inconclusive statuses
                break;
            }
            i = i.getPreviousBuild();
        }
        if (totalCount > 0) {
            int score = (int) ((100.0 * (totalCount - failCount)) / totalCount);

            Localizable description;
            if (failCount == 0) {
                description = Messages._Job_NoRecentBuildFailed();
            } else if (totalCount == failCount) {
                // this should catch the case where totalCount == 1
                // as failCount must be between 0 and totalCount
                // and we can't get here if failCount == 0
                description = Messages._Job_AllRecentBuildFailed();
            } else {
                description = Messages._Job_NOfMFailed(failCount, totalCount);
            }
            return new HealthReport(score, Messages._Job_BuildStability(description));
        }
        return null;
    }