func findPkg(b *util.BuildCtxt, name, cwd string) *dependency.PkgInfo {
var fi os.FileInfo
var err error
var p string
info := &dependency.PkgInfo{
Name: name,
}
// Recurse backward to scan other vendor/ directories
// If the cwd isn't an absolute path walking upwards looking for vendor/
// folders can get into an infinate loop.
abs, err := filepath.Abs(cwd)
if err != nil {
abs = cwd
}
if abs != "." {
// Previously there was a check on the loop that wd := "/". The path
// "/" is a POSIX path so this fails on Windows. Now the check is to
// make sure the same wd isn't seen twice. When the same wd happens
// more than once it's the beginning of looping on the same location
// which is the top level.
pwd := ""
for wd := abs; wd != pwd; wd = filepath.Dir(wd) {
pwd = wd
// Don't look for packages outside the GOPATH
// Note, the GOPATH may or may not end with the path separator.
// The output of filepath.Dir does not the the path separator on the
// end so we need to test both.
if wd == b.GOPATH || wd+string(os.PathSeparator) == b.GOPATH {
break
}
p = filepath.Join(wd, "vendor", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocVendor
info.Vendored = true
return info
}
}
}
// Check $GOPATH
for _, r := range strings.Split(b.GOPATH, ":") {
p = filepath.Join(r, "src", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocGopath
return info
}
}
// Check $GOROOT
for _, r := range strings.Split(b.GOROOT, ":") {
p = filepath.Join(r, "src", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocGoroot
return info
}
}
// Finally, if this is "C", we're dealing with cgo
if name == "C" {
info.Loc = dependency.LocCgo
}
return info
}
func findPkg(b *util.BuildCtxt, name, cwd string) *dependency.PkgInfo {
var fi os.FileInfo
var err error
var p string
info := &dependency.PkgInfo{
Name: name,
}
if strings.HasPrefix(name, "./") || strings.HasPrefix(name, "../") {
info.Loc = dependency.LocRelative
return info
}
// Recurse backward to scan other vendor/ directories
// If the cwd isn't an absolute path walking upwards looking for vendor/
// folders can get into an infinate loop.
abs, err := filepath.Abs(cwd)
if err != nil {
abs = cwd
}
if abs != "." {
// Previously there was a check on the loop that wd := "/". The path
// "/" is a POSIX path so this fails on Windows. Now the check is to
// make sure the same wd isn't seen twice. When the same wd happens
// more than once it's the beginning of looping on the same location
// which is the top level.
pwd := ""
for wd := abs; wd != pwd; wd = filepath.Dir(wd) {
pwd = wd
// Don't look for packages outside the GOPATH
// Note, the GOPATH may or may not end with the path separator.
// The output of filepath.Dir does not the the path separator on the
// end so we need to test both.
if wd == b.GOPATH || wd+string(os.PathSeparator) == b.GOPATH {
break
}
p = filepath.Join(wd, "vendor", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocVendor
info.Vendored = true
return info
}
}
}
// Check $GOPATH
for _, r := range strings.Split(b.GOPATH, ":") {
p = filepath.Join(r, "src", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocGopath
return info
}
}
// Check $GOROOT
for _, r := range strings.Split(b.GOROOT, ":") {
p = filepath.Join(r, "src", name)
if fi, err = os.Stat(p); err == nil && (fi.IsDir() || gpath.IsLink(fi)) {
info.Path = p
info.Loc = dependency.LocGoroot
return info
}
}
// If this is "C", we're dealing with cgo
if name == "C" {
info.Loc = dependency.LocCgo
} else if name == "appengine" || name == "appengine_internal" ||
strings.HasPrefix(name, "appengine/") ||
strings.HasPrefix(name, "appengine_internal/") {
// Appengine is a special case when it comes to Go builds. It is a local
// looking package only available within appengine. It's a special case
// where Google products are playing with each other.
// https://blog.golang.org/the-app-engine-sdk-and-workspaces-gopath
info.Loc = dependency.LocAppengine
} else if name == "context" || name == "net/http/httptrace" {
// context and net/http/httptrace are packages being added to
// the Go 1.7 standard library. Some packages, such as golang.org/x/net
// are importing it with build flags in files for go1.7. Need to detect
// this and handle it.
info.Loc = dependency.LocGoroot
}
return info
}