forked from kardianos/govendor
/
path.go
280 lines (258 loc) · 6.86 KB
/
path.go
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// Copyright 2015 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.
package context
import (
"fmt"
"io"
"path/filepath"
"strings"
"github.com/kardianos/govendor/internal/pathos"
os "github.com/kardianos/govendor/internal/vos"
"github.com/kardianos/govendor/vendorfile"
)
// Import path is in GOROOT or is a special package.
func (ctx *Context) isStdLib(importPath string) (yes bool, err error) {
if importPath == "builtin" || importPath == "unsafe" || importPath == "C" {
yes = true
return
}
dir := filepath.Join(ctx.Goroot, importPath)
fi, _ := os.Stat(dir)
if fi == nil {
return
}
if fi.IsDir() == false {
return
}
yes, err = hasGoFileInFolder(dir)
return
}
// findImportDir finds the absolute directory. If rel is empty vendor folders
// are not looked in.
func (ctx *Context) findImportDir(relative, importPath string) (dir, gopath string, err error) {
if importPath == "builtin" || importPath == "unsafe" || importPath == "C" {
return filepath.Join(ctx.Goroot, importPath), ctx.Goroot, nil
}
if len(relative) != 0 {
rel := relative
for {
look := filepath.Join(rel, ctx.VendorDiscoverFolder, importPath)
nextRel := filepath.Join(rel, "..")
if rel == nextRel {
break
}
rel = nextRel
fi, err := os.Stat(look)
if os.IsNotExist(err) {
continue
}
if err != nil {
continue
}
if fi.IsDir() == false {
continue
}
for _, gopath = range ctx.GopathList {
if pathos.FileHasPrefix(look, gopath) {
hasGo, err := hasGoFileInFolder(look)
if err != nil {
return "", "", err
}
if hasGo {
return look, gopath, nil
}
}
}
}
}
for _, gopath = range ctx.GopathList {
dir := filepath.Join(gopath, importPath)
fi, err := os.Stat(dir)
if os.IsNotExist(err) {
continue
}
if fi.IsDir() == false {
continue
}
hasGo, err := hasGoFileInFolder(dir)
if err != nil {
return "", "", err
}
if hasGo {
return dir, gopath, nil
}
return "", "", ErrNotInGOPATH{fmt.Sprintf("Import: %q relative: %q", importPath, relative)}
}
return "", "", ErrNotInGOPATH{importPath}
}
// findImportPath takes a absolute directory and returns the import path and go path.
func (ctx *Context) findImportPath(dir string) (importPath, gopath string, err error) {
for _, gopath := range ctx.GopathList {
if pathos.FileHasPrefix(dir, gopath) {
importPath = pathos.FileTrimPrefix(dir, gopath)
importPath = pathos.SlashToImportPath(importPath)
return importPath, gopath, nil
}
}
return "", "", ErrNotInGOPATH{dir}
}
func findRoot(folder, vendorPath string) (root string, err error) {
for i := 0; i <= looplimit; i++ {
test := filepath.Join(folder, vendorPath)
_, err := os.Stat(test)
if os.IsNotExist(err) == false {
return folder, nil
}
nextFolder := filepath.Clean(filepath.Join(folder, ".."))
// Check for root folder.
if nextFolder == folder {
return "", ErrMissingVendorFile{vendorPath}
}
folder = nextFolder
}
panic("findRoot loop limit")
}
// findCanonicalPath determines the correct local import path (from GOPATH)
// and from any nested internal vendor files. It returns a string relative to
// the root "internal" folder.
func (ctx *Context) findCanonicalPath(importPath string) (string, error) {
// "crypto/tls" -> "path/to/mypkg/internal/crypto/tls"
// "yours/internal/yourpkg" -> "path/to/mypkg/internal/yourpkg" (IIF yourpkg is a vendor package)
// "yours/internal/myinternal" -> "path/to/mypkg/internal/yours/internal/myinternal" (IIF myinternal is not a vendor package)
// "github.com/kardianos/osext" -> "patn/to/mypkg/internal/github.com/kardianos/osext"
dir, gopath, err := ctx.findImportDir("", importPath)
if err != nil {
return "", err
}
rel := filepath.Join(ctx.VendorFileToFolder, vendorFilename)
root, err := findRoot(dir, rel)
if err != nil {
// No vendor file found. Return origional.
if _, is := err.(ErrMissingVendorFile); is {
return importPath, nil
}
return "", err
}
vf, err := readVendorFile(filepath.Join(root, rel))
if err != nil {
return "", err
}
vpkg := vendorFileFindLocal(vf, root, gopath, importPath)
if vpkg != nil {
return vpkg.Path, nil
}
// Vendor file exists, but the package is not a vendor package.
return importPath, nil
}
func vendorFileFindLocal(vf *vendorfile.File, root, gopath, importPath string) *vendorfile.Package {
local := pathos.SlashToImportPath(pathos.FileTrimPrefix(root, gopath)) // "/co1" = /file/src/co1, /file/src
local = strings.TrimPrefix(strings.TrimPrefix(importPath, local), "/")
for _, pkg := range vf.Package {
if pkg.Remove {
continue
}
if pkg.Path == local {
return pkg
}
}
return nil
}
func hasGoFileInFolder(folder string) (bool, error) {
dir, err := os.Open(folder)
if err != nil {
if os.IsNotExist(err) {
// No folder present, no need to check for files.
return false, nil
}
return false, err
}
fl, err := dir.Readdir(-1)
dir.Close()
if err != nil {
return false, err
}
for _, fi := range fl {
if fi.IsDir() == false && filepath.Ext(fi.Name()) == ".go" {
return true, nil
}
}
return false, nil
}
// RemovePackage removes the specified folder files. If folder is empty when
// done (no nested folders, remove the folder and any empty parent folders.
func RemovePackage(path, root string, tree bool) error {
// Ensure the path is empty of files.
dir, err := os.Open(path)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
// Remove package files.
fl, err := dir.Readdir(-1)
dir.Close()
if err != nil {
return err
}
for _, fi := range fl {
fullPath := filepath.Join(path, fi.Name())
if fi.IsDir() {
if tree {
// If tree == true then remove sub-directories too.
err = os.RemoveAll(fullPath)
if err != nil {
return err
}
}
continue
}
err = os.Remove(fullPath)
if err != nil {
return err
}
}
// Remove empty parent folders.
// Ignore errors here.
for i := 0; i <= looplimit; i++ {
if pathos.FileStringEquals(path, root) {
return nil
}
dir, err := os.Open(path)
if err != nil {
// fmt.Fprintf(os.Stderr, "Failedd to open directory %q: %v\n", path, err)
return nil
}
fl, err := dir.Readdir(1)
dir.Close()
if err != nil && err != io.EOF {
// fmt.Fprintf(os.Stderr, "Failedd to list directory %q: %v\n", path, err)
return nil
}
if len(fl) > 0 {
allAreLicense := true
for _, fi := range fl {
if isLicenseFile(fi.Name()) == false {
allAreLicense = false
break
}
}
if !allAreLicense {
return nil
}
}
err = os.RemoveAll(path)
if err != nil {
// fmt.Fprintf(os.Stderr, "Failedd to remove empty directory %q: %v\n", path, err)
return nil
}
nextPath := filepath.Clean(filepath.Join(path, ".."))
// Check for root.
if nextPath == path {
return nil
}
path = nextPath
}
panic("removePackage() remove parent folders")
}