-
Notifications
You must be signed in to change notification settings - Fork 0
/
scan.go
146 lines (115 loc) · 2.43 KB
/
scan.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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
package main
import (
"errors"
"io"
"io/fs"
"os"
"path/filepath"
"regexp"
"strings"
)
type ReadSeekCloser interface {
io.Reader
io.Seeker
io.Closer
}
type driverGroup struct {
name string
re *regexp.Regexp
}
type driver struct {
name string
categories map[string]struct{}
groups []driverGroup
}
type Scanner struct {
dir string
errh func(error)
drivers map[string]driver
}
func (s *Scanner) driverHasCategory(driver, category string) bool {
if driver, ok := s.drivers[driver]; ok {
if _, ok := driver.categories[category]; ok {
return true
}
}
return false
}
func (s *Scanner) Scan() []*Image {
symlinks := make(map[string]struct{})
initial := make([]*Image, 0)
err := filepath.Walk(s.dir, func(path string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
modtime := info.ModTime()
relpath := strings.Replace(path, s.dir+string(os.PathSeparator), "", 1)
parts := strings.Split(relpath, string(os.PathSeparator))
var (
driver driver
ok bool
category string
)
if len(parts) > 1 {
driver, ok = s.drivers[parts[0]]
if !ok {
s.errh(errors.New("scan: " + path + " - invalid driver " + parts[0]))
return nil
}
parts = parts[1:]
if len(parts) >= 1 {
if s.driverHasCategory(driver.name, parts[0]) {
category = parts[0]
parts = parts[1:]
}
}
name := strings.Join(parts, string(os.PathSeparator))
var link, group string
if info.Mode().Type() == fs.ModeSymlink {
link, _ = os.Readlink(path)
linkpath := filepath.Join(filepath.Dir(path), link)
symlinks[linkpath] = struct{}{}
info, err := os.Stat(linkpath)
if err != nil {
return err
}
if linktime := info.ModTime(); linktime.After(modtime) {
modtime = linktime
}
}
for _, grp := range driver.groups {
if grp.re.Match([]byte(name)) {
group = grp.name
break
}
}
if link != "" {
link = filepath.Join(filepath.Dir(name), link)
}
initial = append(initial, &Image{
Path: path,
Driver: driver.name,
Category: category,
Group: group,
Name: name,
Link: link,
ModTime: modtime,
})
}
return nil
})
if err != nil {
s.errh(err)
}
imgs := make([]*Image, 0, len(initial))
for _, img := range initial {
if _, ok := symlinks[img.Path]; ok {
continue
}
imgs = append(imgs, img)
}
return imgs
}