-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
hotfolder.go
86 lines (77 loc) · 1.79 KB
/
hotfolder.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
package hotfolder
import (
"log"
"os"
"os/exec"
"regexp"
"time"
"github.com/fsnotify/fsnotify"
_ "golang.org/x/sys/unix"
)
type Event struct {
Pattern *regexp.Regexp
Command *string
}
func f(filepath string, events []Event) {
script_pattern := regexp.MustCompile(`run\((.*)\)`)
for _, v := range events {
if v.Pattern.MatchString(filepath) {
log.Printf(`File %q complete. Run %q (matched pattern: %s)`, filepath, *v.Command, v.Pattern.String())
b := script_pattern.FindStringSubmatch(*v.Command)
if b != nil {
cmd := exec.Command(b[1], filepath)
err := cmd.Run()
if err != nil {
log.Println(err)
}
err = os.Remove(filepath)
if err != nil {
log.Println(err)
}
log.Println("Command finished, waiting for next file.")
} else {
log.Println("No run() command found in event.")
}
}
}
}
// Wait until the file filename gets created in directory dir
func watchDirectory(dir string, events []Event) {
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatal(err)
}
defer watcher.Close()
done := make(chan bool)
go func() {
fileStarted := make(map[string]bool)
for {
timer := time.NewTimer(100 * time.Millisecond)
select {
case event := <-watcher.Events:
if event.Op&fsnotify.Write == fsnotify.Write || event.Op&fsnotify.Create == fsnotify.Create {
fileStarted[event.Name] = true
}
case <-timer.C:
if len(fileStarted) > 0 {
for n, _ := range fileStarted {
f(n, events)
delete(fileStarted, n)
}
}
case err := <-watcher.Errors:
log.Println("error:", err)
}
timer.Stop()
}
}()
err = watcher.Add(dir)
if err != nil {
log.Fatal(err)
}
<-done
}
// Wait until filename in dir exists and is complete
func Watch(dir string, events []Event) {
watchDirectory(dir, events)
}