/
registry.go
51 lines (38 loc) 路 877 Bytes
/
registry.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
// Copyright 2017 Josh Komoroske. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE.txt file.
package preview
import (
"errors"
"os/exec"
)
type viewer struct {
Name string
Args []string
}
var registry []viewer
func register(name string, args ...string) {
registry = append(registry, viewer{
Name: name,
Args: args,
})
}
func viewers() []viewer {
return registry
}
func view(filename string) error {
for _, viewer := range viewers() {
cmd := exec.Command(viewer.Name, append(viewer.Args, filename)...)
if err := cmd.Start(); err != nil {
if execErr, ok := err.(*exec.Error); ok {
// This view does not exist, try the next one
if execErr.Err == exec.ErrNotFound {
continue
}
}
return err
}
return nil
}
return errors.New("no viewers available")
}