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filesystem.go
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filesystem.go
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package filesystem
import (
"errors"
"fmt"
"io/fs"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"github.com/Ferlab-Ste-Justine/etcd-sdk/client"
)
func WatchInfoToKeyDiffs(filesystemPath string, w client.WatchInfo) (client.KeyDiff, error) {
diff := client.KeyDiff{
Inserts: make(map[string]string),
Updates: make(map[string]string),
Deletions: w.Deletions,
}
for key, val := range w.Upserts {
_, err := os.Stat(filepath.Join(filesystemPath, key))
if err != nil {
if !errors.Is(err, os.ErrNotExist) {
return diff, err
}
diff.Inserts[key] = val.Value
continue
}
diff.Updates[key] = val.Value
}
return diff, nil
}
func ConvertFileMode(mode string) os.FileMode {
conv, _ := strconv.ParseInt(mode, 8, 32)
return os.FileMode(conv)
}
func EnsureFilesystemDir(filesystemPath string, permissions os.FileMode) error {
_, err := os.Stat(filesystemPath)
if err != nil {
if !errors.Is(err, os.ErrNotExist) {
return err
}
mkErr := os.MkdirAll(filesystemPath, permissions)
if mkErr != nil {
return errors.New(fmt.Sprintf("Error creating filesystem directory: %s", mkErr.Error()))
}
}
return nil
}
func GetDirectoryContent(path string) (client.KeyInfoMap, error) {
keys := client.KeyInfoMap(map[string]client.KeyInfo{})
err := filepath.WalkDir(path, func(path string, entry fs.DirEntry, err error) error {
if err != nil {
return err
}
if !entry.IsDir() {
content, err := ioutil.ReadFile(path)
if err != nil {
return err
}
keys[path] = client.KeyInfo{
Key: filepath.ToSlash(path),
Value: string(content),
Version: 0,
CreateRevision: 0,
ModRevision: 0,
Lease: 0,
}
}
return nil
})
return keys, err
}
func ApplyDiffToDirectory(path string, diff client.KeyDiff, filesPermission os.FileMode, dirPermission os.FileMode) error {
for _, file := range diff.Deletions {
fPath := filepath.Join(path, filepath.FromSlash(file))
err := os.Remove(fPath)
if err != nil {
return err
}
}
upsertFile := func(file string, content string) error {
fPath := filepath.Join(path, filepath.FromSlash(file))
fdir := filepath.Dir(fPath)
mkdirErr := os.MkdirAll(fdir, dirPermission)
if mkdirErr != nil {
return mkdirErr
}
f, err := os.OpenFile(fPath, os.O_RDWR|os.O_CREATE, filesPermission)
if err != nil {
return err
}
err = f.Truncate(0)
if err != nil {
f.Close()
return err
}
_, err = f.Write([]byte(content))
if err != nil {
f.Close()
return err
}
if err := f.Close(); err != nil {
return err
}
return nil
}
for file, content := range diff.Inserts {
err := upsertFile(file, content)
if err != nil {
return err
}
}
for file, content := range diff.Updates {
err := upsertFile(file, content)
if err != nil {
return err
}
}
return nil
}