sing-box/cmd/internal/build/sdk.go

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package main
import (
"os"
"path/filepath"
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"runtime"
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"sort"
"strconv"
"strings"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/rw"
)
var (
androidSDKPath string
androidNDKPath string
)
func findSDK() {
searchPath := []string{
"$ANDROID_HOME",
"$HOME/Android/Sdk",
"$HOME/.local/lib/android/sdk",
"$HOME/Library/Android/sdk",
}
for _, path := range searchPath {
path = os.ExpandEnv(path)
if rw.FileExists(path + "/licenses/android-sdk-license") {
androidSDKPath = path
break
}
}
if androidSDKPath == "" {
log.Fatal("android SDK not found")
}
if !findNDK() {
log.Fatal("android NDK not found")
}
os.Setenv("ANDROID_HOME", androidSDKPath)
os.Setenv("ANDROID_SDK_HOME", androidSDKPath)
os.Setenv("ANDROID_NDK_HOME", androidNDKPath)
os.Setenv("NDK", androidNDKPath)
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os.Setenv("PATH", os.Getenv("PATH")+":"+filepath.Join(androidNDKPath, "toolchains", "llvm", "prebuilt", runtime.GOOS+"-x86_64", "bin"))
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}
func findNDK() bool {
if rw.FileExists(androidSDKPath + "/ndk/25.1.8937393") {
androidNDKPath = androidSDKPath + "/ndk/25.1.8937393"
return true
}
ndkVersions, err := os.ReadDir(androidSDKPath + "/ndk")
if err != nil {
return false
}
versionNames := common.Map(ndkVersions, os.DirEntry.Name)
if len(versionNames) == 0 {
return false
}
sort.Slice(versionNames, func(i, j int) bool {
iVersions := strings.Split(versionNames[i], ".")
jVersions := strings.Split(versionNames[j], ".")
for k := 0; k < len(iVersions) && k < len(jVersions); k++ {
iVersion, _ := strconv.Atoi(iVersions[k])
jVersion, _ := strconv.Atoi(jVersions[k])
if iVersion != jVersion {
return iVersion > jVersion
}
}
return true
})
for _, versionName := range versionNames {
if rw.FileExists(androidSDKPath + "/ndk/" + versionName) {
androidNDKPath = androidSDKPath + "/ndk/" + versionName
return true
}
}
return false
}