wide/util/go.go

134 lines
3.2 KiB
Go

// Copyright (c) 2014-2017, b3log.org & hacpai.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"os"
"path"
"path/filepath"
"runtime"
"sort"
"strings"
)
const (
pathSeparator = string(os.PathSeparator) // OS-specific path separator
pathListSeparator = string(os.PathListSeparator) // OS-specific path list separator
)
type mygo struct{}
// Go utilities.
var Go = mygo{}
func (*mygo) GetCrossPlatforms() []string {
ret := []string{}
toolDir := runtime.GOROOT() + "/pkg/tool"
f, _ := os.Open(toolDir)
names, _ := f.Readdirnames(-1)
f.Close()
for _, name := range names {
subDir, _ := os.Open(toolDir + "/" + name)
tools, _ := subDir.Readdirnames(10)
subDir.Close()
if len(tools) > 5 {
ret = append(ret, name)
}
}
return ret
}
// GetAPIPath gets the Go source code path.
//
// 1. before Go 1.4: $GOROOT/src/pkg
// 2. Go 1.4 and after: $GOROOT/src
func (*mygo) GetAPIPath() string {
ret := runtime.GOROOT() + "/src/pkg" // before Go 1.4
if !File.IsExist(ret) {
ret = runtime.GOROOT() + "/src" // Go 1.4 and after
}
return filepath.FromSlash(path.Clean(ret))
}
// IsAPI determines whether the specified path belongs to Go API.
func (*mygo) IsAPI(path string) bool {
apiPath := Go.GetAPIPath()
return strings.HasPrefix(filepath.FromSlash(path), apiPath)
}
// GetGoFormats gets Go format tools. It may return ["gofmt", "goimports"].
func (*mygo) GetGoFormats() []string {
ret := []string{"gofmt"}
p := Go.GetExecutableInGOBIN("goimports")
if File.IsExist(p) {
ret = append(ret, "goimports")
}
sort.Strings(ret)
return ret
}
// GetExecutableInGOBIN gets executable file under GOBIN path.
//
// The specified executable should not with extension, this function will append .exe if on Windows.
func (*mygo) GetExecutableInGOBIN(executable string) string {
if OS.IsWindows() {
executable += ".exe"
}
gopaths := filepath.SplitList(os.Getenv("GOPATH"))
for _, gopath := range gopaths {
// $GOPATH/bin/$GOOS_$GOARCH/executable
ret := gopath + pathSeparator + "bin" + pathSeparator +
os.Getenv("GOOS") + "_" + os.Getenv("GOARCH") + pathSeparator + executable
if File.IsExist(ret) {
return ret
}
// $GOPATH/bin/{runtime.GOOS}_{runtime.GOARCH}/executable
ret = gopath + pathSeparator + "bin" + pathSeparator +
runtime.GOOS + "_" + runtime.GOARCH + pathSeparator + executable
if File.IsExist(ret) {
return ret
}
// $GOPATH/bin/executable
ret = gopath + pathSeparator + "bin" + pathSeparator + executable
if File.IsExist(ret) {
return ret
}
}
// $GOBIN/executable
gobin := os.Getenv("GOBIN")
if "" != gobin {
ret := gobin + pathSeparator + executable
if File.IsExist(ret) {
return ret
}
}
return "./" + executable
}