986f076276
Add a new generic container registry client via a new `container` package. Use this to create a command line utility as well as a new upload target for container registries. The code uses the github.com/containers/* project and packages to interact with container registires that is also used by skopeo, podman et al. One if the dependencies is `proglottis/gpgme` that is using cgo to bind libgpgme, so we have to add the corresponding devel package to the BuildRequires as well as installing it on CI. Checks will follow later via an integration test.
108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
package units
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// See: http://en.wikipedia.org/wiki/Binary_prefix
|
|
const (
|
|
// Decimal
|
|
|
|
KB = 1000
|
|
MB = 1000 * KB
|
|
GB = 1000 * MB
|
|
TB = 1000 * GB
|
|
PB = 1000 * TB
|
|
|
|
// Binary
|
|
|
|
KiB = 1024
|
|
MiB = 1024 * KiB
|
|
GiB = 1024 * MiB
|
|
TiB = 1024 * GiB
|
|
PiB = 1024 * TiB
|
|
)
|
|
|
|
type unitMap map[string]int64
|
|
|
|
var (
|
|
decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB}
|
|
binaryMap = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB}
|
|
sizeRegex = regexp.MustCompile(`^(\d+(\.\d+)*) ?([kKmMgGtTpP])?[iI]?[bB]?$`)
|
|
)
|
|
|
|
var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
|
|
var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
|
|
|
|
func getSizeAndUnit(size float64, base float64, _map []string) (float64, string) {
|
|
i := 0
|
|
unitsLimit := len(_map) - 1
|
|
for size >= base && i < unitsLimit {
|
|
size = size / base
|
|
i++
|
|
}
|
|
return size, _map[i]
|
|
}
|
|
|
|
// CustomSize returns a human-readable approximation of a size
|
|
// using custom format.
|
|
func CustomSize(format string, size float64, base float64, _map []string) string {
|
|
size, unit := getSizeAndUnit(size, base, _map)
|
|
return fmt.Sprintf(format, size, unit)
|
|
}
|
|
|
|
// HumanSizeWithPrecision allows the size to be in any precision,
|
|
// instead of 4 digit precision used in units.HumanSize.
|
|
func HumanSizeWithPrecision(size float64, precision int) string {
|
|
size, unit := getSizeAndUnit(size, 1000.0, decimapAbbrs)
|
|
return fmt.Sprintf("%.*g%s", precision, size, unit)
|
|
}
|
|
|
|
// HumanSize returns a human-readable approximation of a size
|
|
// capped at 4 valid numbers (eg. "2.746 MB", "796 KB").
|
|
func HumanSize(size float64) string {
|
|
return HumanSizeWithPrecision(size, 4)
|
|
}
|
|
|
|
// BytesSize returns a human-readable size in bytes, kibibytes,
|
|
// mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").
|
|
func BytesSize(size float64) string {
|
|
return CustomSize("%.4g%s", size, 1024.0, binaryAbbrs)
|
|
}
|
|
|
|
// FromHumanSize returns an integer from a human-readable specification of a
|
|
// size using SI standard (eg. "44kB", "17MB").
|
|
func FromHumanSize(size string) (int64, error) {
|
|
return parseSize(size, decimalMap)
|
|
}
|
|
|
|
// RAMInBytes parses a human-readable string representing an amount of RAM
|
|
// in bytes, kibibytes, mebibytes, gibibytes, or tebibytes and
|
|
// returns the number of bytes, or -1 if the string is unparseable.
|
|
// Units are case-insensitive, and the 'b' suffix is optional.
|
|
func RAMInBytes(size string) (int64, error) {
|
|
return parseSize(size, binaryMap)
|
|
}
|
|
|
|
// Parses the human-readable size string into the amount it represents.
|
|
func parseSize(sizeStr string, uMap unitMap) (int64, error) {
|
|
matches := sizeRegex.FindStringSubmatch(sizeStr)
|
|
if len(matches) != 4 {
|
|
return -1, fmt.Errorf("invalid size: '%s'", sizeStr)
|
|
}
|
|
|
|
size, err := strconv.ParseFloat(matches[1], 64)
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
unitPrefix := strings.ToLower(matches[3])
|
|
if mul, ok := uMap[unitPrefix]; ok {
|
|
size *= float64(mul)
|
|
}
|
|
|
|
return int64(size), nil
|
|
}
|