func loadCovOrDie()

in tools/checkcov.go [69:116]
42 lines of code
9 McCabe index (conditional complexity)

func loadCovOrDie() coverageResult {
	f, err := os.Open(*coverageOutputFile)
	if err != nil {
		fmt.Printf("Error opening coverageOutputFile %q: %v", *coverageOutputFile, err)
		os.Exit(2)
	}
	in, err := io.ReadAll(f)
	if err != nil {
		fmt.Printf("Error reading coverageOutputFile %q: %v", *coverageOutputFile, err)
		os.Exit(2)
	}

	ret := coverageResult{}
	lines := strings.Split(string(in), "\n")

	for lineIndex, line := range lines {
		fields := strings.Fields(line)
		if len(fields) == 0 {
			continue
		}
		packageName := fields[1]

		switch fields[0] {
		case "?":
			ret[packageName] = 0.0
			continue
		case "ok":
			// fallthrough to process the "ok" lines.
		default:
			continue
		}

		index := covLine.SubexpIndex("cov")
		matches := covLine.FindStringSubmatch(line)
		if matches == nil {
			fmt.Printf("Error: could not parse line %d: (text was %q)\n", lineIndex+1, line)
			os.Exit(2)
		}
		cov, err := strconv.ParseFloat(matches[index], 32)
		if err != nil {
			fmt.Printf("Error: could not parse line %d: %v (text was %q)\n", lineIndex+1, err, line)
			os.Exit(2)
		}
		ret[packageName] = cov
	}

	return ret
}