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api.go
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api.go
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package main
import (
"bufio"
"os"
"path/filepath"
"regexp"
"strings"
)
func apipath(base string) string {
return filepath.Join(os.Getenv("GOROOT"), "api", base)
}
var sym = regexp.MustCompile(`^pkg (\S+)\s?(.*)?, (?:(var|func|type|const)) ([A-Z]\w*)`)
type GoApi struct {
Keys map[string]bool
Ver string
}
func LoadApi(ver string) (*GoApi, error) {
f, err := os.Open(apipath(ver + ".txt"))
if err != nil {
return nil, err
}
sc := bufio.NewScanner(f)
keys := make(map[string]bool)
for sc.Scan() {
l := sc.Text()
has := func(v string) bool { return strings.Contains(l, v) }
if has("interface, ") || has(", method (") {
continue
}
if m := sym.FindStringSubmatch(l); m != nil {
// 1 pkgname
// 2 os-arch-cgo
// 3 var|func|type|const
// 4 name
key := m[1] + "." + m[4]
keys[key] = true
}
}
return &GoApi{Ver: ver, Keys: keys}, nil
}
type ApiCheck struct {
Base map[string]bool
Apis []*GoApi
}
func NewApiCheck() *ApiCheck {
ac := &ApiCheck{}
ac.Base = make(map[string]bool)
return ac
}
func (ac *ApiCheck) LoadBase(vers ...string) error {
for _, ver := range vers {
api, err := LoadApi(ver)
if err != nil {
return err
}
for k, v := range api.Keys {
ac.Base[k] = v
}
}
return nil
}
func (ac *ApiCheck) LoadApi(vers ...string) error {
for _, ver := range vers {
api, err := LoadApi(ver)
if err != nil {
return err
}
for k, _ := range api.Keys {
if ac.Base[k] {
delete(api.Keys, k)
}
}
ac.Apis = append(ac.Apis, api)
}
return nil
}
func (ac *ApiCheck) FincApis(name string) (vers []string) {
for _, api := range ac.Apis {
if api.Keys[name] {
vers = append(vers, api.Ver)
}
}
return
}
func (ac *ApiCheck) ApiVers() (vers []string) {
for _, api := range ac.Apis {
vers = append(vers, api.Ver)
}
return
}