Can't get parser.ParseDir to parse Import statements - go

Question

I'm having trouble getting parser.ParseDir to return any information in the returned struct.Imports field. parser.ParseFile does seem to work however. I would much rather use ParseDir than have to go through and call ParseFile on each file. Here's what I've tried:
package crawlers
import (
"fmt"
"go/parser"
"go/token"
"os"
"path/filepath"
)
type GoImports struct {
//imports []*string
}
//returns fullpaths
func (g *GoImports) Crawl(entry string) ([]*string, error) {
fp, err := filepath.Abs(entry)
if err != nil {
return nil, err
}
info, err := os.Stat(fp)
if err != nil {
return nil, err
}
if !info.IsDir() {
return nil, fmt.Errorf("Entry point should be a path to a directory of a go package.")
}
fset := token.NewFileSet()
//foo, err := parser.ParseDir(fset, fp, nil, parser.ImportsOnly)
//foo, err := parser.ParseDir(fset, "/Users/dowen00/local/go/src/got/crawlers/testdata/barpackage", nil, parser.ImportsOnly)
foo, err := parser.ParseDir(fset, "/Users/dowen00/local/go/src/opscli", func(os.FileInfo) bool { return true }, parser.ImportsOnly)
//_, err = parser.ParseDir(fset, "/Users/dowen00/local/go/src/got/crawlers/testdata", nil, parser.ImportsOnly)
//foo, err := parser.ParseFile(fset, "/Users/dowen00/local/go/src/got/crawlers/testdata/barpackage/bar.go", nil, parser.ImportsOnly)
if err != nil {
return nil, err
}
//fmt.Printf("%c\n", foo)
//fmt.Printf("%c\n", fset)
for k, v := range foo {
//for kv, vv := range v.Imports {
//fmt.Printf("%s: %c\n", kv, vv)
//}
fmt.Printf("%s: %c\n", k, v.Imports)
}
return nil, nil
}
What am I doing wrong?

Answer 1

I was able to work around the problem. If this, in fact, hasn't been implemented the go docs at https://golang.org/pkg/go/parser/#ParseDir should probably be revised to avoid wasting people's time.
Here's the work around:
for _, v := range foo {
//for kv, vv := range v.Imports {
//fmt.Printf("%s: %c\n", kv, vv)
//}
for kk, vv := range v.Files {
for _, i := range vv.Imports {
fmt.Printf("%s: %s\n", kk, i.Path.Value)
}
}
//fmt.Printf("%s: %c\n", k, v.Files)
}