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0
forked from sm/vain
vain/vain.go

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// Package vain implements a vanity service for use by the the go tool.
//
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// The executable, cmd/vaind, is located in the respective subdirectory.
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package vain
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import (
"bytes"
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
"io"
"strings"
)
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var vcss = map[string]bool{
"hg": true,
"git": true,
"bzr": true,
"svn": true,
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}
func valid(vcs string) bool {
_, ok := vcss[vcs]
return ok
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}
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// Package stores the three pieces of information needed to create the meta
// tag. Two of these (Vcs and Repo) are stored explicitly, and the third is
// determined implicitly by the path POSTed to. For more information refer to
// the documentation for the go tool:
//
// https://golang.org/cmd/go/#hdr-Remote_import_paths
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type Package struct {
//Vcs (version control system) supported: "hg", "git", "bzr", "svn"
Vcs string `json:"vcs"`
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// Repo: the remote repository url
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Repo string `json:"repo"`
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Path string `json:"path"`
Ns string `json:"-"`
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}
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func (p Package) String() string {
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return fmt.Sprintf(
"<meta name=\"go-import\" content=\"%s %s %s\">",
p.Path,
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p.Vcs,
p.Repo,
)
}
// Valid checks that p will not confuse the go tool if added to packages.
func Valid(p string, packages []Package) bool {
for _, pkg := range packages {
if strings.HasPrefix(pkg.Path, p) || strings.HasPrefix(p, pkg.Path) {
return false
}
}
return true
}
func parseNamespace(path string) (string, error) {
path = strings.TrimLeft(path, "/")
if path == "" {
return "", errors.New("path does not contain namespace")
}
elems := strings.Split(path, "/")
return elems[0], nil
}
// FreshToken returns a random token string.
func FreshToken() string {
buf := &bytes.Buffer{}
io.Copy(buf, io.LimitReader(rand.Reader, 6))
s := hex.EncodeToString(buf.Bytes())
r := []string{}
for i := 0; i < len(s)/4; i++ {
r = append(r, s[i*4:(i+1)*4])
}
return strings.Join(r, "-")
}