/
generate.go
217 lines (178 loc) · 4.11 KB
/
generate.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
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
package generate
import (
"bytes"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"sync"
"github.com/nix-community/go-nix/pkg/nar"
"github.com/nix-community/gomod2nix/internal/lib"
schema "github.com/nix-community/gomod2nix/internal/schema"
log "github.com/sirupsen/logrus"
"golang.org/x/mod/modfile"
)
type goModDownload struct {
Path string
Version string
Info string
GoMod string
Zip string
Dir string
Sum string
GoModSum string
}
func sourceFilter(name string, nodeType nar.NodeType) bool {
return strings.ToLower(filepath.Base(name)) != ".ds_store"
}
func common(directory string) ([]*goModDownload, map[string]string, error) {
goModPath := filepath.Join(directory, "go.mod")
log.WithFields(log.Fields{
"modPath": goModPath,
}).Info("Parsing go.mod")
// Read go.mod
data, err := os.ReadFile(goModPath)
if err != nil {
return nil, nil, err
}
// Parse go.mod
mod, err := modfile.Parse(goModPath, data, nil)
if err != nil {
return nil, nil, err
}
// Map repos -> replacement repo
replace := make(map[string]string)
for _, repl := range mod.Replace {
replace[repl.New.Path] = repl.Old.Path
}
var modDownloads []*goModDownload
{
log.Info("Downloading dependencies")
cmd := exec.Command(
"go", "mod", "download", "--json",
)
cmd.Dir = directory
stdout, err := cmd.Output()
if err != nil {
return nil, nil, err
}
dec := json.NewDecoder(bytes.NewReader(stdout))
for {
var dl *goModDownload
err := dec.Decode(&dl)
if err == io.EOF {
break
}
modDownloads = append(modDownloads, dl)
}
log.Info("Done downloading dependencies")
}
return modDownloads, replace, nil
}
func ImportPkgs(directory string, numWorkers int) error {
modDownloads, _, err := common(directory)
if err != nil {
return err
}
executor := lib.NewParallellExecutor(numWorkers)
for _, dl := range modDownloads {
dl := dl
executor.Add(func() error {
log.WithFields(log.Fields{
"goPackagePath": dl.Path,
}).Info("Importing sources")
pathName := filepath.Base(dl.Path) + "_" + dl.Version
cmd := exec.Command(
"nix-instantiate",
"--eval",
"--expr",
fmt.Sprintf(`
builtins.filterSource (name: type: baseNameOf name != ".DS_Store") (
builtins.path {
path = "%s";
name = "%s";
}
)
`, dl.Dir, pathName),
)
cmd.Stderr = os.Stderr
err = cmd.Start()
if err != nil {
fmt.Println(cmd)
return err
}
err = cmd.Wait()
if err != nil {
fmt.Println(cmd)
return err
}
return nil
})
}
return executor.Wait()
}
func GeneratePkgs(directory string, goMod2NixPath string, numWorkers int) ([]*schema.Package, error) {
modDownloads, replace, err := common(directory)
if err != nil {
return nil, err
}
executor := lib.NewParallellExecutor(numWorkers)
var mux sync.Mutex
cache := schema.ReadCache(goMod2NixPath)
packages := []*schema.Package{}
addPkg := func(pkg *schema.Package) {
mux.Lock()
packages = append(packages, pkg)
mux.Unlock()
}
for _, dl := range modDownloads {
dl := dl
goPackagePath, hasReplace := replace[dl.Path]
if !hasReplace {
goPackagePath = dl.Path
}
cached, ok := cache[goPackagePath]
if ok && cached.Version == dl.Version {
addPkg(cached)
continue
}
executor.Add(func() error {
log.WithFields(log.Fields{
"goPackagePath": goPackagePath,
}).Info("Calculating NAR hash")
h := sha256.New()
err := nar.DumpPathFilter(h, dl.Dir, sourceFilter)
if err != nil {
return err
}
digest := h.Sum(nil)
pkg := &schema.Package{
GoPackagePath: goPackagePath,
Version: dl.Version,
Hash: "sha256-" + base64.StdEncoding.EncodeToString(digest),
}
if hasReplace {
pkg.ReplacedPath = dl.Path
}
addPkg(pkg)
log.WithFields(log.Fields{
"goPackagePath": goPackagePath,
}).Info("Done calculating NAR hash")
return nil
})
}
err = executor.Wait()
if err != nil {
return nil, err
}
sort.Slice(packages, func(i, j int) bool {
return packages[i].GoPackagePath < packages[j].GoPackagePath
})
return packages, nil
}