Parsing CPU Info for Illumos

package main

import (
    "fmt"
    "regexp"
    "strconv"

    "github.com/davecgh/go-spew/spew"
)

func main() {
    expression := regexp.MustCompile(`The physical processor has (?:([\d]+) virtual processor \(([\d]+)\)|([\d]+) cores and ([\d]+) virtual processors[^\n]+)\n(?:\s+ The core has.+\n)*\s+.+ ([\S]+) family (.+) model (.+) step (.+) clock (.+) MHz`)

    d := func(s string) {
        type cpuInfo struct {
            numCores int64
            numHT    int64
            proc     string
            family   string
            model    string
            step     string
            clock    string
        }

        matches := expression.FindAllStringSubmatch(s, -1)

        fmt.Printf(s)
        cpus := make([]cpuInfo, 0, len(matches))
        for _, cpuMatch := range matches {
            spew.Dump(cpuMatch)

            var err error
            var numCores int64
            var numHT int64
            switch {
            case cpuMatch[1] != "":
                numCores, err = strconv.ParseInt(cpuMatch[1], 10, 64)
                if err != nil {
                    panic(err)
                }
            case cpuMatch[3] != "":
                numCores, err = strconv.ParseInt(cpuMatch[3], 10, 64)
                if err != nil {
                    panic(err)
                }

                numHT, err = strconv.ParseInt(cpuMatch[4], 10, 64)
                if err != nil {
                    panic(err)
                }
            }

            cpus = append(cpus, cpuInfo{
                numCores: numCores,
                numHT:    numHT,
                proc:     cpuMatch[5],
                family:   cpuMatch[6],
                model:    cpuMatch[7],
                step:     cpuMatch[8],
                clock:    cpuMatch[9],
            })

        }
        spew.Dump(cpus)
    }

    d(inputSinglecore)
    d(inputMulticore)
}

const inputSinglecore = `The physical processor has 1 virtual processor (0)
  x86 (GenuineIntel 406E3 family 6 model 78 step 3 clock 3312 MHz)
        Intel(r) Core(tm) i7-6567U CPU @ 3.30GHz
The physical processor has 1 virtual processor (1)
  x86 (GenuineIntel 406E3 family 6 model 78 step 3 clock 3312 MHz)
        Intel(r) Core(tm) i7-6567U CPU @ 3.30GHz
`

const inputMulticore = `The physical processor has 8 cores and 16 virtual processors (0-7 16-23)
  The core has 2 virtual processors (0 16)
  The core has 2 virtual processors (1 17)
  The core has 2 virtual processors (2 18)
  The core has 2 virtual processors (3 19)
  The core has 2 virtual processors (4 20)
  The core has 2 virtual processors (5 21)
  The core has 2 virtual processors (6 22)
  The core has 2 virtual processors (7 23)
    x86 (GenuineIntel 206D7 family 6 model 45 step 7 clock 2600 MHz)
      Intel(r) Xeon(r) CPU E5-2670 0 @ 2.60GHz
The physical processor has 8 cores and 16 virtual processors (8-15 24-31)
  The core has 2 virtual processors (8 24)
  The core has 2 virtual processors (9 25)
  The core has 2 virtual processors (10 26)
  The core has 2 virtual processors (11 27)
  The core has 2 virtual processors (12 28)
  The core has 2 virtual processors (13 29)
  The core has 2 virtual processors (14 30)
  The core has 2 virtual processors (15 31)
    x86 (GenuineIntel 206D7 family 6 model 45 step 7 clock 2600 MHz)
      Intel(r) Xeon(r) CPU E5-2670 0 @ 2.60GHz
`