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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// get or find VESPA_HOME
// Author: arnej
package vespa
import (
"fmt"
"os"
"strings"
"github.com/vespa-engine/vespa/client/go/internal/admin/envvars"
"github.com/vespa-engine/vespa/client/go/internal/admin/trace"
"github.com/vespa-engine/vespa/client/go/internal/util"
)
const (
defaultVespaInstallDir = "/opt/vespa"
scriptUtilsFilename = "libexec/vespa/vespa-wrapper"
)
func FindHome() string {
// use env var if it is set:
if ev := os.Getenv(envvars.VESPA_HOME); ev != "" {
return ev
}
// some helper functions...
var dirName = func(path string) string {
idx := strings.LastIndex(path, "/")
if idx < 0 {
return ""
}
return path[:idx]
}
var findPath = func() string {
myProgName := os.Args[0]
if strings.HasPrefix(myProgName, "/") {
trace.Debug("findPath", myProgName, "=>", dirName(myProgName))
return dirName(myProgName)
}
if strings.Contains(myProgName, "/") {
curDir, _ := os.Getwd()
path := fmt.Sprintf("%s/%s", curDir, dirName(myProgName))
trace.Debug("findPath", myProgName, "=>", path)
return path
}
for _, dir := range strings.Split(os.Getenv(envvars.PATH), ":") {
fn := fmt.Sprintf("%s/%s", dir, myProgName)
if util.IsRegularFile(fn) {
trace.Debug("findPath", myProgName, "=>", dir)
return dir
}
}
return ""
}
// detect path from argv[0]
for path := findPath(); path != ""; path = dirName(path) {
mySelf := fmt.Sprintf("%s/%s", path, scriptUtilsFilename)
if util.IsRegularFile(mySelf) {
trace.Debug("found", mySelf, "VH =>", path)
os.Setenv(envvars.VESPA_HOME, path)
return path
}
}
// fallback
os.Setenv(envvars.VESPA_HOME, defaultVespaInstallDir)
return defaultVespaInstallDir
}
func HasFileUnderVespaHome(fn string) (bool, string) {
fileName := fmt.Sprintf("%s/%s", FindHome(), fn)
file, err := os.Open(fileName)
if file != nil {
file.Close()
if err == nil {
return true, fileName
}
}
return false, ""
}
func FindAndVerifyVespaHome() string {
vespaHome := FindHome()
myself := fmt.Sprintf("%s/%s", vespaHome, scriptUtilsFilename)
if !util.IsExecutableFile(myself) {
trace.Warning("missing or bad file:", myself)
util.JustExitMsg("Not a valid VESPA_HOME: " + vespaHome)
}
return vespaHome
}
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