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utils_paths.go
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/
utils_paths.go
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package utils
import (
"fmt"
"os"
"path"
"strings"
"github.com/akutz/gotil"
"github.com/joan-s-molas/rexray/libstorage/api/types"
)
// NewPathConfig returns a new path configuration object.
//
// The args parameter can take zero to three arguments:
//
// 1. The first argument is treated as a custom root, data
// directory path. This defaults root path is "/".
//
// 2. The second argument is treated as a custom application
// token. This is used to brand libStorage's paths, files,
// and environment variables. The default application
// token is "libstorage".
//
// 3. The third argument is treated as a custom home directory
// for the executing process's user. The default value
// is the user's home directory.
func NewPathConfig(args ...string) *types.PathConfig {
var (
home string
token string
userHome string
)
if len(args) > 0 {
home = args[0]
}
if len(args) > 1 {
token = args[1]
}
if len(args) > 2 {
userHome = args[2]
}
if token == "" {
if v := os.Getenv("LIBSTORAGE_APPTOKEN"); v != "" {
token = v
} else {
token = "libstorage"
}
}
if userHome == "" {
userHome = gotil.HomeDir()
}
pathConfig := &types.PathConfig{
Token: token,
UserHome: path.Join(userHome, fmt.Sprintf(".%s", token)),
}
pathConfig.UserDefaultTLSKnownHosts = path.Join(
pathConfig.UserHome, "known_hosts")
var (
ucTok = strings.ToUpper(token)
envVarHome = fmt.Sprintf("%s_HOME", ucTok)
envVarHomeEtc = fmt.Sprintf("%s_HOME_ETC", ucTok)
envVarHomeEtcTLS = fmt.Sprintf("%s_HOME_ETC_TLS", ucTok)
envVarHomeLib = fmt.Sprintf("%s_HOME_LIB", ucTok)
envVarHomeLog = fmt.Sprintf("%s_HOME_LOG", ucTok)
envVarHomeRun = fmt.Sprintf("%s_HOME_RUN", ucTok)
)
// init the home dir
if home != "" {
pathConfig.Home = home
} else if pathConfig.Home = os.Getenv(envVarHome); pathConfig.Home == "" {
pathConfig.Home = "/"
}
if pathConfig.Home == "/" && os.Geteuid() != 0 {
pathConfig.Home = path.Join(gotil.HomeDir(), fmt.Sprintf(".%s", token))
}
os.MkdirAll(pathConfig.Home, 0755)
// init the other paths
initPathConfigFieldWithEnvVar(envVarHomeEtc, &pathConfig.Etc)
initPathConfigFieldWithEnvVar(envVarHomeEtcTLS, &pathConfig.TLS)
initPathConfigFieldWithEnvVar(envVarHomeLib, &pathConfig.Lib)
initPathConfigFieldWithEnvVar(envVarHomeLog, &pathConfig.Log)
initPathConfigFieldWithEnvVar(envVarHomeRun, &pathConfig.Run)
root := pathConfig.Home == "/"
initPathConfigFieldWithPath(
root, true, token, pathConfig.Home, "etc", &pathConfig.Etc)
initPathConfigFieldWithPath(
false, true, token, pathConfig.Etc, "tls", &pathConfig.TLS)
initPathConfigFieldWithPath(
root, true, token, pathConfig.Home, "var/lib", &pathConfig.Lib)
initPathConfigFieldWithPath(
root, true, token, pathConfig.Home, "var/log", &pathConfig.Log)
initPathConfigFieldWithPath(
root, true, token, pathConfig.Home, "var/run", &pathConfig.Run)
initPathConfigFieldWithPath(
false, false, token, pathConfig.TLS,
fmt.Sprintf("%s.crt", token), &pathConfig.DefaultTLSCertFile)
initPathConfigFieldWithPath(
false, false, token, pathConfig.TLS,
fmt.Sprintf("%s.key", token), &pathConfig.DefaultTLSKeyFile)
initPathConfigFieldWithPath(
false, false, token, pathConfig.TLS,
"known_hosts", &pathConfig.DefaultTLSKnownHosts)
initPathConfigFieldWithPath(
false, false, token, pathConfig.TLS,
"cacerts", &pathConfig.DefaultTLSTrustedRootsFile)
/*ctx.WithFields(map[string]interface{}{
"token": pathConfig.Token,
"usrHome": pathConfig.UserHome,
"sysHome": pathConfig.Home,
"sysEtc": pathConfig.Etc,
"sysTLS": pathConfig.TLS,
"sysLib": pathConfig.Lib,
"sysLog": pathConfig.Log,
"sysRun": pathConfig.Run,
}).Info("created new path config")*/
return pathConfig
}
func initPathConfigFieldWithEnvVar(envVarName string, field *string) {
if v := os.Getenv(envVarName); v != "" && gotil.FileExists(v) {
*field = v
}
}
func initPathConfigFieldWithPath(
root, mkdir bool,
token, parent, dir string, field *string) {
defer func() {
if !mkdir {
return
}
os.MkdirAll(*field, 0755)
}()
if *field != "" {
return
}
if root {
*field = path.Join(parent, dir, token)
} else {
*field = path.Join(parent, dir)
}
}