127 lines
3.0 KiB
Go
127 lines
3.0 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package versioner
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"strings"
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"time"
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"github.com/syncthing/syncthing/lib/build"
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"github.com/syncthing/syncthing/lib/config"
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"github.com/syncthing/syncthing/lib/fs"
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"github.com/kballard/go-shellquote"
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)
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func init() {
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// Register the constructor for this type of versioner with the name "external"
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factories["external"] = newExternal
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}
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type external struct {
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command string
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filesystem fs.Filesystem
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}
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func newExternal(cfg config.FolderConfiguration) Versioner {
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command := cfg.Versioning.Params["command"]
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if build.IsWindows {
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command = strings.ReplaceAll(command, `\`, `\\`)
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}
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s := external{
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command: command,
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filesystem: cfg.Filesystem(nil),
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}
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l.Debugf("instantiated %#v", s)
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return s
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}
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// Archive moves the named file away to a version archive. If this function
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// returns nil, the named file does not exist any more (has been archived).
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func (v external) Archive(filePath string) error {
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info, err := v.filesystem.Lstat(filePath)
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if fs.IsNotExist(err) {
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l.Debugln("not archiving nonexistent file", filePath)
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return nil
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} else if err != nil {
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return err
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}
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if info.IsSymlink() {
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panic("bug: attempting to version a symlink")
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}
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l.Debugln("archiving", filePath)
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if v.command == "" {
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return errors.New("command is empty, please enter a valid command")
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}
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words, err := shellquote.Split(v.command)
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if err != nil {
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return fmt.Errorf("command is invalid: %w", err)
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}
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context := map[string]string{
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"%FOLDER_FILESYSTEM%": v.filesystem.Type().String(),
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"%FOLDER_PATH%": v.filesystem.URI(),
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"%FILE_PATH%": filePath,
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}
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for i, word := range words {
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for key, val := range context {
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word = strings.ReplaceAll(word, key, val)
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}
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words[i] = word
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}
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cmd := exec.Command(words[0], words[1:]...)
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env := os.Environ()
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// filter STGUIAUTH and STGUIAPIKEY from environment variables
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filteredEnv := []string{}
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for _, x := range env {
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if !strings.HasPrefix(x, "STGUIAUTH=") && !strings.HasPrefix(x, "STGUIAPIKEY=") {
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filteredEnv = append(filteredEnv, x)
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}
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}
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cmd.Env = filteredEnv
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combinedOutput, err := cmd.CombinedOutput()
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l.Debugln("external command output:", string(combinedOutput))
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if err != nil {
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if eerr, ok := err.(*exec.ExitError); ok && len(eerr.Stderr) > 0 {
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return fmt.Errorf("%v: %v", err, string(eerr.Stderr))
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}
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return err
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}
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// return error if the file was not removed
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if _, err = v.filesystem.Lstat(filePath); fs.IsNotExist(err) {
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return nil
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}
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return errors.New("file was not removed by external script")
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}
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func (external) GetVersions() (map[string][]FileVersion, error) {
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return nil, ErrRestorationNotSupported
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}
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func (external) Restore(_ string, _ time.Time) error {
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return ErrRestorationNotSupported
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}
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func (external) Clean(_ context.Context) error {
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return nil
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}
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