forked from caicloud/nirvana
/
path.go
121 lines (109 loc) · 3.01 KB
/
path.go
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/*
Copyright 2018 Caicloud Authors
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 project
import (
"fmt"
"go/build"
"os"
"path/filepath"
"strings"
)
// goPaths contains all valid go paths.
var goPaths []string
var goSrcPaths []string
func init() {
paths := strings.Split(build.Default.GOPATH, string(os.PathListSeparator))
for _, path := range paths {
path, err := filepath.Abs(path)
if err != nil {
continue
}
info, err := os.Stat(path)
if err != nil || !info.IsDir() {
// Ignore go path which is inexistent or non-readable.
continue
}
goPaths = append(goPaths, path)
goSrcPaths = append(goSrcPaths, srcPath(path))
}
}
// srcPath returns the path of src in go path.
func srcPath(goPath string) string {
return filepath.Join(goPath, "src")
}
// GoPaths returns existent go paths.
func GoPaths() []string {
result := make([]string, len(goPaths))
copy(result, goPaths)
return result
}
// GoPath finds the go path and absolute path for specified directory.
func GoPath(directory string) (goPath string, absPath string, err error) {
absPath, err = filepath.Abs(directory)
if err != nil {
return "", "", err
}
for i, path := range goSrcPaths {
if strings.HasPrefix(absPath, path) {
return goPaths[i], absPath, nil
}
}
return "", "", fmt.Errorf("%s is not in GOPATH", absPath)
}
// PackageForPath gets package path for a path.
func PackageForPath(directory string) (string, error) {
goPath, absPath, err := GoPath(directory)
if err != nil {
return "", err
}
return filepath.ToSlash(strings.Trim(absPath[len(srcPath(goPath)):], string(os.PathSeparator))), nil
}
// Subdirectories walkthroughs all subdirectories. The results contains itself.
// If a path is non-existent or not in GOPATH, the path will be ignored.
func Subdirectories(vendor bool, paths ...string) []string {
walked := map[string]bool{}
goDir := map[string]bool{}
for _, path := range paths {
_, absPath, err := GoPath(path)
if err != nil {
// Ignore the err and go next.
continue
}
err = filepath.Walk(absPath, func(path string, info os.FileInfo, err error) error {
if err != nil {
return filepath.SkipDir
}
if info.IsDir() {
if !vendor && info.Name() == "vendor" {
return filepath.SkipDir
}
if walked[path] {
return filepath.SkipDir
}
walked[path] = true
return nil
}
if strings.HasSuffix(path, ".go") {
dir := filepath.Dir(path)
goDir[dir] = true
}
return nil
})
_ = err
}
results := []string{}
for path := range goDir {
results = append(results, path)
}
return results
}