Update to the latest version of buildah

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/cgroups/cpu.go

@@ -1,123 +0,0 @@
-package cgroups
-
-import (
-	"fmt"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"strconv"
-	"strings"
-
-	spec "github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/pkg/errors"
-)
-
-type cpuHandler struct {
-}
-
-func getCPUHandler() *cpuHandler {
-	return &cpuHandler{}
-}
-
-func cleanString(s string) string {
-	return strings.Trim(s, "\n")
-}
-
-func readAcct(ctr *CgroupControl, name string) (uint64, error) {
-	p := filepath.Join(ctr.getCgroupv1Path(CPUAcct), name)
-	return readFileAsUint64(p)
-}
-
-func readAcctList(ctr *CgroupControl, name string) ([]uint64, error) {
-	var r []uint64
-
-	p := filepath.Join(ctr.getCgroupv1Path(CPUAcct), name)
-	data, err := ioutil.ReadFile(p)
-	if err != nil {
-		return nil, errors.Wrapf(err, "reading %s", p)
-	}
-	for _, s := range strings.Split(string(data), " ") {
-		s = cleanString(s)
-		if s == "" {
-			break
-		}
-		v, err := strconv.ParseUint(s, 10, 0)
-		if err != nil {
-			return nil, errors.Wrapf(err, "parsing %s", s)
-		}
-		r = append(r, v)
-	}
-	return r, nil
-}
-
-// Apply set the specified constraints
-func (c *cpuHandler) Apply(ctr *CgroupControl, res *spec.LinuxResources) error {
-	if res.CPU == nil {
-		return nil
-	}
-	return fmt.Errorf("cpu apply not implemented yet")
-}
-
-// Create the cgroup
-func (c *cpuHandler) Create(ctr *CgroupControl) (bool, error) {
-	if ctr.cgroup2 {
-		return false, nil
-	}
-	return ctr.createCgroupDirectory(CPU)
-}
-
-// Destroy the cgroup
-func (c *cpuHandler) Destroy(ctr *CgroupControl) error {
-	return rmDirRecursively(ctr.getCgroupv1Path(CPU))
-}
-
-// Stat fills a metrics structure with usage stats for the controller
-func (c *cpuHandler) Stat(ctr *CgroupControl, m *Metrics) error {
-	var err error
-	usage := CPUUsage{}
-	if ctr.cgroup2 {
-		values, err := readCgroup2MapFile(ctr, "cpu.stat")
-		if err != nil {
-			return err
-		}
-		if val, found := values["usage_usec"]; found {
-			usage.Total, err = strconv.ParseUint(cleanString(val[0]), 10, 0)
-			if err != nil {
-				return err
-			}
-			usage.Kernel *= 1000
-		}
-		if val, found := values["system_usec"]; found {
-			usage.Kernel, err = strconv.ParseUint(cleanString(val[0]), 10, 0)
-			if err != nil {
-				return err
-			}
-			usage.Total *= 1000
-		}
-		// FIXME: How to read usage.PerCPU?
-	} else {
-		usage.Total, err = readAcct(ctr, "cpuacct.usage")
-		if err != nil {
-			if !os.IsNotExist(errors.Cause(err)) {
-				return err
-			}
-			usage.Total = 0
-		}
-		usage.Kernel, err = readAcct(ctr, "cpuacct.usage_sys")
-		if err != nil {
-			if !os.IsNotExist(errors.Cause(err)) {
-				return err
-			}
-			usage.Kernel = 0
-		}
-		usage.PerCPU, err = readAcctList(ctr, "cpuacct.usage_percpu")
-		if err != nil {
-			if !os.IsNotExist(errors.Cause(err)) {
-				return err
-			}
-			usage.PerCPU = nil
-		}
-	}
-	m.CPU = CPUMetrics{Usage: usage}
-	return nil
-}