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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Wrappers for Go parser.
package main
import (
"go/ast"
"go/parser"
"log"
"os"
"path/filepath"
"strconv"
"strings"
"runtime"
)
type dirInfo struct {
goFiles []string // .go files within dir (including cgoFiles)
cgoFiles []string // .go files that import "C"
cFiles []string // .c files within dir
sFiles []string // .s files within dir
imports []string // All packages imported by goFiles
pkgName string // Name of package within dir
}
// scanDir returns a structure with details about the Go content found
// in the given directory. The list of files will NOT contain the
// following entries:
//
// - Files in package main (unless allowMain is true)
// - Files ending in _test.go
// - Files starting with _ (temporary)
// - Files containing .cgo in their names
//
// The imports map keys are package paths imported by listed Go files,
// and the values are the Go files importing the respective package paths.
func scanDir(dir string, allowMain bool) (info *dirInfo, err os.Error) {
f, err := os.Open(dir)
if err != nil {
return nil, err
}
dirs, err := f.Readdir(-1)
f.Close()
if err != nil {
return nil, err
}
goFiles := make([]string, 0, len(dirs))
cgoFiles := make([]string, 0, len(dirs))
cFiles := make([]string, 0, len(dirs))
sFiles := make([]string, 0, len(dirs))
importsm := make(map[string]bool)
pkgName := ""
for i := range dirs {
d := &dirs[i]
if strings.HasPrefix(d.Name, "_") || strings.Index(d.Name, ".cgo") != -1 {
continue
}
if !goodOSArch(d.Name) {
continue
}
switch filepath.Ext(d.Name) {
case ".go":
if strings.HasSuffix(d.Name, "_test.go") {
continue
}
case ".c":
cFiles = append(cFiles, d.Name)
continue
case ".s":
sFiles = append(sFiles, d.Name)
continue
default:
continue
}
filename := filepath.Join(dir, d.Name)
pf, err := parser.ParseFile(fset, filename, nil, parser.ImportsOnly)
if err != nil {
return nil, err
}
s := string(pf.Name.Name)
if s == "main" && !allowMain {
continue
}
if pkgName == "" {
pkgName = s
} else if pkgName != s {
// Only if all files in the directory are in package main
// do we return pkgName=="main".
// A mix of main and another package reverts
// to the original (allowMain=false) behaviour.
if s == "main" || pkgName == "main" {
return scanDir(dir, false)
}
return nil, os.ErrorString("multiple package names in " + dir)
}
goFiles = append(goFiles, d.Name)
for _, decl := range pf.Decls {
for _, spec := range decl.(*ast.GenDecl).Specs {
quoted := string(spec.(*ast.ImportSpec).Path.Value)
unquoted, err := strconv.Unquote(quoted)
if err != nil {
log.Panicf("%s: parser returned invalid quoted string: <%s>", filename, quoted)
}
importsm[unquoted] = true
if unquoted == "C" {
cgoFiles = append(cgoFiles, d.Name)
}
}
}
}
imports := make([]string, len(importsm))
i := 0
for p := range importsm {
imports[i] = p
i++
}
return &dirInfo{goFiles, cgoFiles, cFiles, sFiles, imports, pkgName}, nil
}
// goodOSArch returns false if the filename contains a $GOOS or $GOARCH
// suffix which does not match the current system.
// The recognized filename formats are:
//
// name_$(GOOS).*
// name_$(GOARCH).*
// name_$(GOOS)_$(GOARCH).*
//
func goodOSArch(filename string) bool {
if dot := strings.Index(filename, "."); dot != -1 {
filename = filename[:dot]
}
l := strings.Split(filename, "_", -1)
n := len(l)
if n == 0 {
return true
}
if good, known := goodOS[l[n-1]]; known {
return good
}
if good, known := goodArch[l[n-1]]; known {
if !good || n < 2 {
return false
}
good, known = goodOS[l[n-2]]
return good || !known
}
return true
}
var goodOS = make(map[string]bool)
var goodArch = make(map[string]bool)
func init() {
goodOS = make(map[string]bool)
goodArch = make(map[string]bool)
for _, v := range strings.Fields(goosList) {
goodOS[v] = v == runtime.GOOS
}
for _, v := range strings.Fields(goarchList) {
goodArch[v] = v == runtime.GOARCH
}
}
|
