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
147
148
149
150
151
152
|
package main
import (
"github.com/golang/protobuf/proto"
"github.com/spf13/afero"
"io/ioutil"
"net/url"
"os"
"path"
"strings"
)
const assetPrefix string = "/$asset$/"
var fs afero.Fs
func InitOS() {
fs = afero.NewOsFs()
Sub("os", func(buf []byte) []byte {
msg := &Msg{}
check(proto.Unmarshal(buf, msg))
switch msg.Command {
case Msg_CODE_FETCH:
return HandleCodeFetch(
msg.CodeFetchModuleSpecifier,
msg.CodeFetchContainingFile)
case Msg_CODE_CACHE:
return HandleCodeCache(
msg.CodeCacheFilename,
msg.CodeCacheSourceCode,
msg.CodeCacheOutputCode)
case Msg_EXIT:
os.Exit(int(msg.ExitCode))
case Msg_READ_FILE_SYNC:
return ReadFileSync(msg.ReadFileSyncFilename)
default:
panic("[os] Unexpected message " + string(buf))
}
return nil
})
}
func ResolveModule(moduleSpecifier string, containingFile string) (
moduleName string, filename string, err error) {
logDebug("os.go ResolveModule moduleSpecifier %s containingFile %s", moduleSpecifier, containingFile)
moduleUrl, err := url.Parse(moduleSpecifier)
if err != nil {
return
}
baseUrl, err := url.Parse(containingFile)
if err != nil {
return
}
resolved := baseUrl.ResolveReference(moduleUrl)
moduleName = resolved.String()
if moduleUrl.IsAbs() {
filename = path.Join(SrcDir, resolved.Host, resolved.Path)
} else {
filename = resolved.Path
}
return
}
func HandleCodeFetch(moduleSpecifier string, containingFile string) (out []byte) {
assert(moduleSpecifier != "", "moduleSpecifier shouldn't be empty")
res := &Msg{}
var sourceCodeBuf []byte
var err error
defer func() {
if err != nil {
res.Error = err.Error()
}
out, err = proto.Marshal(res)
check(err)
}()
moduleName, filename, err := ResolveModule(moduleSpecifier, containingFile)
if err != nil {
return
}
logDebug("CodeFetch moduleSpecifier %s containingFile %s filename %s",
moduleSpecifier, containingFile, filename)
if isRemote(moduleName) {
sourceCodeBuf, err = FetchRemoteSource(moduleName, filename)
} else if strings.HasPrefix(moduleName, assetPrefix) {
f := strings.TrimPrefix(moduleName, assetPrefix)
sourceCodeBuf, err = Asset("dist/" + f)
if err != nil {
logDebug("%s Asset doesn't exist. Return without error", moduleName)
err = nil
}
} else {
assert(moduleName == filename,
"if a module isn't remote, it should have the same filename")
sourceCodeBuf, err = ioutil.ReadFile(moduleName)
}
if err != nil {
return
}
outputCode, err := LoadOutputCodeCache(filename, sourceCodeBuf)
if err != nil {
return
}
var sourceCode = string(sourceCodeBuf)
var command = Msg_CODE_FETCH_RES
res = &Msg{
Command: command,
CodeFetchResModuleName: moduleName,
CodeFetchResFilename: filename,
CodeFetchResSourceCode: sourceCode,
CodeFetchResOutputCode: outputCode,
}
return
}
func HandleCodeCache(filename string, sourceCode string,
outputCode string) []byte {
fn := CacheFileName(filename, []byte(sourceCode))
outputCodeBuf := []byte(outputCode)
err := ioutil.WriteFile(fn, outputCodeBuf, 0600)
res := &Msg{}
if err != nil {
res.Error = err.Error()
}
out, err := proto.Marshal(res)
check(err)
return out
}
func ReadFileSync(filename string) []byte {
data, err := afero.ReadFile(fs, filename)
res := &Msg{
Command: Msg_READ_FILE_SYNC_RES,
}
if err != nil {
res.Error = err.Error()
} else {
res.ReadFileSyncData = data
}
out, err := proto.Marshal(res)
check(err)
return out
}
|
