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// Copyright 2014-2016 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package arch
import (
"regexp"
"runtime"
"strings"
)
// The following constants define the machine architectures supported by Juju.
const (
AMD64 = "amd64"
I386 = "i386"
ARM = "armhf"
ARM64 = "arm64"
PPC64EL = "ppc64el"
S390X = "s390x"
// Older versions of Juju used "ppc64" instead of ppc64el
LEGACY_PPC64 = "ppc64"
)
// AllSupportedArches records the machine architectures recognised by Juju.
var AllSupportedArches = []string{
AMD64,
I386,
ARM,
ARM64,
PPC64EL,
S390X,
}
// Info records the information regarding each architecture recognised by Juju.
var Info = map[string]ArchInfo{
AMD64: {64},
I386: {32},
ARM: {32},
ARM64: {64},
PPC64EL: {64},
S390X: {64},
}
// ArchInfo is a struct containing information about a supported architecture.
type ArchInfo struct {
// WordSize is the architecture's word size, in bits.
WordSize int
}
// archREs maps regular expressions for matching
// `uname -m` to architectures recognised by Juju.
var archREs = []struct {
*regexp.Regexp
arch string
}{
{regexp.MustCompile("amd64|x86_64"), AMD64},
{regexp.MustCompile("i?[3-9]86"), I386},
{regexp.MustCompile("(arm$)|(armv.*)"), ARM},
{regexp.MustCompile("aarch64"), ARM64},
{regexp.MustCompile("ppc64|ppc64el|ppc64le"), PPC64EL},
{regexp.MustCompile("s390x"), S390X},
}
// Override for testing.
var HostArch = hostArch
// hostArch returns the Juju architecture of the machine on which it is run.
func hostArch() string {
return NormaliseArch(runtime.GOARCH)
}
// NormaliseArch returns the Juju architecture corresponding to a machine's
// reported architecture. The Juju architecture is used to filter simple
// streams lookup of tools and images.
func NormaliseArch(rawArch string) string {
rawArch = strings.TrimSpace(rawArch)
for _, re := range archREs {
if re.Match([]byte(rawArch)) {
return re.arch
}
}
return rawArch
}
// IsSupportedArch returns true if arch is one supported by Juju.
func IsSupportedArch(arch string) bool {
for _, a := range AllSupportedArches {
if a == arch {
return true
}
}
return false
}
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