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
170
171
172
173
174
175
176
|
// Copyright 2018 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.
package modload
import (
"context"
"fmt"
"io/fs"
"os"
"path/filepath"
"strings"
"cmd/go/internal/cfg"
"cmd/go/internal/fsys"
"cmd/go/internal/imports"
"cmd/go/internal/search"
"golang.org/x/mod/module"
)
type stdFilter int8
const (
omitStd = stdFilter(iota)
includeStd
)
// matchPackages is like m.MatchPackages, but uses a local variable (rather than
// a global) for tags, can include or exclude packages in the standard library,
// and is restricted to the given list of modules.
func matchPackages(ctx context.Context, m *search.Match, tags map[string]bool, filter stdFilter, modules []module.Version) {
m.Pkgs = []string{}
isMatch := func(string) bool { return true }
treeCanMatch := func(string) bool { return true }
if !m.IsMeta() {
isMatch = search.MatchPattern(m.Pattern())
treeCanMatch = search.TreeCanMatchPattern(m.Pattern())
}
have := map[string]bool{
"builtin": true, // ignore pseudo-package that exists only for documentation
}
if !cfg.BuildContext.CgoEnabled {
have["runtime/cgo"] = true // ignore during walk
}
type pruning int8
const (
pruneVendor = pruning(1 << iota)
pruneGoMod
)
walkPkgs := func(root, importPathRoot string, prune pruning) {
root = filepath.Clean(root)
err := fsys.Walk(root, func(path string, fi fs.FileInfo, err error) error {
if err != nil {
m.AddError(err)
return nil
}
want := true
elem := ""
// Don't use GOROOT/src but do walk down into it.
if path == root {
if importPathRoot == "" {
return nil
}
} else {
// Avoid .foo, _foo, and testdata subdirectory trees.
_, elem = filepath.Split(path)
if strings.HasPrefix(elem, ".") || strings.HasPrefix(elem, "_") || elem == "testdata" {
want = false
}
}
name := importPathRoot + filepath.ToSlash(path[len(root):])
if importPathRoot == "" {
name = name[1:] // cut leading slash
}
if !treeCanMatch(name) {
want = false
}
if !fi.IsDir() {
if fi.Mode()&fs.ModeSymlink != 0 && want {
if target, err := fsys.Stat(path); err == nil && target.IsDir() {
fmt.Fprintf(os.Stderr, "warning: ignoring symlink %s\n", path)
}
}
return nil
}
if !want {
return filepath.SkipDir
}
// Stop at module boundaries.
if (prune&pruneGoMod != 0) && path != root {
if fi, err := os.Stat(filepath.Join(path, "go.mod")); err == nil && !fi.IsDir() {
return filepath.SkipDir
}
}
if !have[name] {
have[name] = true
if isMatch(name) {
if _, _, err := scanDir(path, tags); err != imports.ErrNoGo {
m.Pkgs = append(m.Pkgs, name)
}
}
}
if elem == "vendor" && (prune&pruneVendor != 0) {
return filepath.SkipDir
}
return nil
})
if err != nil {
m.AddError(err)
}
}
if filter == includeStd {
walkPkgs(cfg.GOROOTsrc, "", pruneGoMod)
if treeCanMatch("cmd") {
walkPkgs(filepath.Join(cfg.GOROOTsrc, "cmd"), "cmd", pruneGoMod)
}
}
if cfg.BuildMod == "vendor" {
if HasModRoot() {
walkPkgs(ModRoot(), targetPrefix, pruneGoMod|pruneVendor)
walkPkgs(filepath.Join(ModRoot(), "vendor"), "", pruneVendor)
}
return
}
for _, mod := range modules {
if !treeCanMatch(mod.Path) {
continue
}
var (
root, modPrefix string
isLocal bool
)
if mod == Target {
if !HasModRoot() {
continue // If there is no main module, we can't search in it.
}
root = ModRoot()
modPrefix = targetPrefix
isLocal = true
} else {
var err error
needSum := true
root, isLocal, err = fetch(ctx, mod, needSum)
if err != nil {
m.AddError(err)
continue
}
modPrefix = mod.Path
}
prune := pruneVendor
if isLocal {
prune |= pruneGoMod
}
walkPkgs(root, modPrefix, prune)
}
return
}
|
