99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
/*
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* LURE - Linux User REpository
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* Copyright (C) 2023 Arsen Musayelyan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package cpu
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import (
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"os"
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"runtime"
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"strings"
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"golang.org/x/sys/cpu"
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)
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// ARMVariant checks which variant of ARM lure is running
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// on, by using the same detection method as Go itself
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func ARMVariant() string {
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armEnv := os.Getenv("LURE_ARM_VARIANT")
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// ensure value has "arm" prefix, such as arm5 or arm6
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if strings.HasPrefix(armEnv, "arm") {
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return armEnv
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}
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if cpu.ARM.HasVFPv3 {
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return "arm7"
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} else if cpu.ARM.HasVFP {
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return "arm6"
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} else {
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return "arm5"
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}
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}
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// CompatibleARM returns all the compatible ARM variants given the system architecture
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func CompatibleARM(variant string) []string {
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switch variant {
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case "arm7", "arm":
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return []string{"arm7", "arm6", "arm5"}
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case "arm6":
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return []string{"arm6", "arm5"}
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case "arm5":
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return []string{"arm5"}
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default:
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return []string{variant}
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}
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}
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// CompatibleARMReverse returns all the compatible ARM variants given the package's architecture
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func CompatibleARMReverse(variant string) []string {
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switch variant {
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case "arm7":
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return []string{"arm7"}
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case "arm6":
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return []string{"arm6", "arm7"}
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case "arm5", "arm":
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return []string{"arm5", "arm6", "arm7"}
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default:
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return []string{variant}
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}
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}
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// Arch returns the canonical CPU architecture of the system
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func Arch() string {
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arch := os.Getenv("LURE_ARCH")
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if arch == "" {
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arch = runtime.GOARCH
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}
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if arch == "arm" {
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arch = ARMVariant()
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}
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return arch
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}
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// Arches returns all the architectures the system is compatible with
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func Arches() []string {
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arch := os.Getenv("LURE_ARCH")
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if arch == "" {
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arch = runtime.GOARCH
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}
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if strings.HasPrefix(arch, "arm") {
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return append(CompatibleARM(arch), "arm")
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} else {
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return []string{Arch()}
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}
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}
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