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
|
package libsass
import (
"strconv"
"sync"
"github.com/wellington/go-libsass/libs"
)
var globalHeaders []string
// RegisterHeader fifo
func RegisterHeader(body string) {
ghMu.Lock()
globalHeaders = append(globalHeaders, body)
ghMu.Unlock()
}
type Header struct {
idx *string
Content string
}
type Headers struct {
wg sync.WaitGroup
closing chan struct{}
sync.RWMutex
h []Header
// idx is a pointer for libsass to lookup these Headers
idx int
}
// NewHeaders instantiates a Headers for prefixing Sass to input
// See: https://github.com/sass/libsass/wiki/API-Sass-Importer
func NewHeaders() *Headers {
h := &Headers{
closing: make(chan struct{}),
}
return h
}
func (hdrs *Headers) Bind(opts libs.SassOptions) {
// Push the headers into the local array
ghMu.RLock()
for _, gh := range globalHeaders {
if !hdrs.Has(gh) {
hdrs.Add(gh)
}
}
ghMu.RUnlock()
// Loop through headers creating ImportEntry
entries := make([]libs.ImportEntry, hdrs.Len())
hdrs.RLock()
for i, ent := range hdrs.h {
uniquename := "hdr" + strconv.FormatInt(int64(i), 10)
entries[i] = libs.ImportEntry{
// Each entry requires a unique identifier
// https://github.com/sass/libsass/issues/1292
Path: uniquename,
Source: ent.Content,
SrcMap: "",
}
}
hdrs.RUnlock()
// Preserve reference to libs address to these entries
hdrs.idx = libs.BindHeader(opts, entries)
}
func (hdrs *Headers) Close() {
// Clean up memory reserved for headers
libs.RemoveHeaders(hdrs.idx)
close(hdrs.closing)
hdrs.wg.Wait()
}
func (h *Headers) Add(s string) {
h.Lock()
defer h.Unlock()
h.h = append(h.h, Header{
Content: s,
})
}
func (h *Headers) Has(s string) bool {
for _, c := range h.h {
if s == c.Content {
return true
}
}
return false
}
func (h *Headers) Len() int {
return len(h.h)
}
|
