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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.
// TODO: Figure out what gopkg.in should do.
package modfile
import "strings"
// ParseGopkgIn splits gopkg.in import paths into their constituent parts
func ParseGopkgIn(path string) (root, repo, major, subdir string, ok bool) {
if !strings.HasPrefix(path, "gopkg.in/") {
return
}
f := strings.Split(path, "/")
if len(f) >= 2 {
if elem, v, ok := dotV(f[1]); ok {
root = strings.Join(f[:2], "/")
repo = "github.com/go-" + elem + "/" + elem
major = v
subdir = strings.Join(f[2:], "/")
return root, repo, major, subdir, true
}
}
if len(f) >= 3 {
if elem, v, ok := dotV(f[2]); ok {
root = strings.Join(f[:3], "/")
repo = "github.com/" + f[1] + "/" + elem
major = v
subdir = strings.Join(f[3:], "/")
return root, repo, major, subdir, true
}
}
return
}
func dotV(name string) (elem, v string, ok bool) {
i := len(name) - 1
for i >= 0 && '0' <= name[i] && name[i] <= '9' {
i--
}
if i <= 2 || i+1 >= len(name) || name[i-1] != '.' || name[i] != 'v' || name[i+1] == '0' && len(name) != i+2 {
return "", "", false
}
return name[:i-1], name[i:], true
}
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