func (ctx *Context) addSingleImport(pkgInDir, imp string) error {
if _, found := ctx.Package[imp]; found {
return nil
}
// Also need to check for vendor paths that won't use the local path in import path.
for _, pkg := range ctx.Package {
if pkg.Canonical == imp && pkg.inVendor && pathos.FileHasPrefix(pkg.Dir, pkgInDir) {
return nil
}
}
dir, gopath, err := ctx.findImportDir(pkgInDir, imp)
if err != nil {
if _, is := err.(ErrNotInGOPATH); is {
ctx.setPackage("", imp, imp, "", StatusMissing)
return nil
}
return err
}
if pathos.FileStringEquals(gopath, ctx.Goroot) {
ctx.setPackage(dir, imp, imp, ctx.Goroot, StatusStandard)
return nil
}
df, err := os.Open(dir)
if err != nil {
return err
}
info, err := df.Readdir(-1)
df.Close()
if err != nil {
return err
}
for _, fi := range info {
if fi.IsDir() {
continue
}
switch fi.Name()[0] {
case '.', '_':
continue
}
if pathos.FileStringEquals(dir, pkgInDir) {
continue
}
path := filepath.Join(dir, fi.Name())
err = ctx.addFileImports(path, gopath)
if err != nil {
return err
}
}
return nil
}
func (ctx *Context) determinePackageStatus() error {
// Determine the status of remaining imports.
for _, pkg := range ctx.Package {
if pkg.Status != StatusUnknown {
continue
}
if vp := ctx.VendorFilePackageLocal(pkg.Local); vp != nil {
pkg.Status = StatusVendor
pkg.inVendor = true
pkg.Canonical = vp.Path
continue
}
if strings.HasPrefix(pkg.Canonical, ctx.RootImportPath) {
pkg.Status = StatusLocal
continue
}
pkg.Status = StatusExternal
}
// Check all "external" packages for vendor.
for _, pkg := range ctx.Package {
if pkg.Status != StatusExternal {
continue
}
root, err := findRoot(pkg.Dir, vendorFilename)
if err != nil {
// No vendor file found.
if _, is := err.(ErrMissingVendorFile); is {
continue
}
return err
}
vf, err := readVendorFile(filepath.Join(root, vendorFilename))
if err != nil {
return err
}
vpkg := vendorFileFindLocal(vf, root, pkg.Gopath, pkg.Local)
if vpkg != nil {
pkg.Canonical = vpkg.Path
}
}
// Determine any un-used internal vendor imports.
ctx.updatePackageReferences()
for i := 0; i <= looplimit; i++ {
altered := false
for path, pkg := range ctx.Package {
if len(pkg.referenced) == 0 && pkg.Status == StatusVendor {
altered = true
pkg.Status = StatusUnused
for _, other := range ctx.Package {
delete(other.referenced, path)
}
}
}
if !altered {
break
}
if i == looplimit {
panic("determinePackageStatus loop limit")
}
}
return nil
}