forked from ContainX/docker-volume-netshare
/
util.go
120 lines (105 loc) · 2.43 KB
/
util.go
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package drivers
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
)
const (
ShareSplitIndentifer = "#"
)
func createDest(dest string) error {
fi, err := os.Lstat(dest)
if os.IsNotExist(err) {
if err := os.MkdirAll(dest, 0755); err != nil {
return err
}
} else if err != nil {
return err
}
if fi != nil && !fi.IsDir() {
return fmt.Errorf("%v already exist and it's not a directory", dest)
}
return nil
}
// Used to support on the fly volume creation using docker run. If = is in the name we split
// and elem[1] is the volume name
func resolveName(name string) (string, map[string]string) {
if strings.Contains(name, ShareSplitIndentifer) {
sharevol := strings.Split(name, ShareSplitIndentifer)
opts := map[string]string{}
opts[ShareOpt] = sharevol[0]
opts[CreateOpt] = "true"
return sharevol[1], opts
}
return name, nil
}
func shareDefinedWithVolume(name string) bool {
return strings.Contains(name, ShareSplitIndentifer)
}
func addShareColon(share string) string {
if strings.Contains(share, ":") {
return share
}
source := strings.Split(share, "/")
source[0] = source[0] + ":"
return strings.Join(source, "/")
}
func mountpoint(elem ...string) string {
return filepath.Join(elem...)
}
func run(cmd string) error {
if out, err := exec.Command("sh", "-c", cmd).CombinedOutput(); err != nil {
log.Println(string(out))
return err
}
return nil
}
func merge(src, src2 map[string]string) map[string]string {
if len(src) == 0 && len(src2) == 0 {
return EmptyMap
}
dst := map[string]string{}
for k, v := range src2 {
dst[k] = v
}
for k, v := range src {
dst[k] = v
}
return dst
}
func checkFile(file string) error {
_, err := os.Stat(file)
if os.IsNotExist(err) {
_, err := os.Create(file)
if err != nil {
return err
}
}
return nil
}
func readState(f string) (map[string]map[string]string, error) {
checkFile(f)
var jsonData map[string]map[string]string
jsonFile, _ := ioutil.ReadFile(f)
err := json.Unmarshal([]byte(jsonFile), &jsonData)
res := map[string]map[string]string{}
// Remove volumes with non existent paths
for k, v := range jsonData {
if _, err := os.Stat(v["Path"]); !os.IsNotExist(err) {
res[k] = map[string]string{
"Path": v["Path"],
}
}
}
return res, err
}
func writeState(f string, d map[string]map[string]string) error {
jsonData, _ := json.Marshal(d)
err := ioutil.WriteFile(f, jsonData, 0644)
return err
}