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// 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 modconv
import (
"fmt"
"internal/lazyregexp"
"net/url"
"path"
"strconv"
"strings"
"golang.org/x/mod/modfile"
"golang.org/x/mod/module"
"golang.org/x/mod/semver"
)
func ParseGopkgLock(file string, data []byte) (*modfile.File, error) {
type pkg struct {
Path string
Version string
Source string
}
mf := new(modfile.File)
var list []pkg
var r *pkg
for lineno, line := range strings.Split(string(data), "\n") {
lineno++
if i := strings.Index(line, "#"); i >= 0 {
line = line[:i]
}
line = strings.TrimSpace(line)
if line == "[[projects]]" {
list = append(list, pkg{})
r = &list[len(list)-1]
continue
}
if strings.HasPrefix(line, "[") {
r = nil
continue
}
if r == nil {
continue
}
before, after, found := strings.Cut(line, "=")
if !found {
continue
}
key := strings.TrimSpace(before)
val := strings.TrimSpace(after)
if len(val) >= 2 && val[0] == '"' && val[len(val)-1] == '"' {
q, err := strconv.Unquote(val) // Go unquoting, but close enough for now
if err != nil {
return nil, fmt.Errorf("%s:%d: invalid quoted string: %v", file, lineno, err)
}
val = q
}
switch key {
case "name":
r.Path = val
case "source":
r.Source = val
case "revision", "version":
// Note: key "version" should take priority over "revision",
// and it does, because dep writes toml keys in alphabetical order,
// so we see version (if present) second.
if key == "version" {
if !semver.IsValid(val) || semver.Canonical(val) != val {
break
}
}
r.Version = val
}
}
for _, r := range list {
if r.Path == "" || r.Version == "" {
return nil, fmt.Errorf("%s: empty [[projects]] stanza (%s)", file, r.Path)
}
mf.Require = append(mf.Require, &modfile.Require{Mod: module.Version{Path: r.Path, Version: r.Version}})
if r.Source != "" {
// Convert "source" to import path, such as
// git@test.com:x/y.git and https://test.com/x/y.git.
// We get "test.com/x/y" at last.
source, err := decodeSource(r.Source)
if err != nil {
return nil, err
}
old := module.Version{Path: r.Path, Version: r.Version}
new := module.Version{Path: source, Version: r.Version}
mf.Replace = append(mf.Replace, &modfile.Replace{Old: old, New: new})
}
}
return mf, nil
}
var scpSyntaxReg = lazyregexp.New(`^([a-zA-Z0-9_]+)@([a-zA-Z0-9._-]+):(.*)$`)
func decodeSource(source string) (string, error) {
var u *url.URL
var p string
if m := scpSyntaxReg.FindStringSubmatch(source); m != nil {
// Match SCP-like syntax and convert it to a URL.
// Eg, "git@github.com:user/repo" becomes
// "ssh://git@github.com/user/repo".
u = &url.URL{
Scheme: "ssh",
User: url.User(m[1]),
Host: m[2],
Path: "/" + m[3],
}
} else {
var err error
u, err = url.Parse(source)
if err != nil {
return "", fmt.Errorf("%q is not a valid URI", source)
}
}
// If no scheme was passed, then the entire path will have been put into
// u.Path. Either way, construct the normalized path correctly.
if u.Host == "" {
p = source
} else {
p = path.Join(u.Host, u.Path)
}
p = strings.TrimSuffix(p, ".git")
p = strings.TrimSuffix(p, ".hg")
return p, nil
}
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