Dumping a list of types in a project

code-list.go

package main

import (
	"fmt"
	"log"
	"os"
	"strings"

	"golang.org/x/tools/go/packages"
)

func main() {
	pList, err := packages.Load(&packages.Config{
		Mode: packages.NeedFiles |
			packages.LoadImports |
			packages.NeedTypes,
	}, "./...")
	if err != nil {
		log.Fatal(err)
	}

	path, err := os.Getwd()
	if err != nil {
		log.Fatal(err)
	}

	for _, p := range pList {
		packageName := p.String()
		fmt.Printf("## %s\n\n", packageName)
		fmt.Printf("Go files: \n")
		for _, f := range p.GoFiles {
			// strip current working directory from filenames.
			f := strings.Replace(f, path+"/", "", -1)
			fmt.Printf("* %s\n", f)
		}
		scope := p.Types.Scope()
		fmt.Println()
		fmt.Println("Types:")
		for _, name := range scope.Names() {
			scopeInfo := scope.Lookup(name).String()
			// don't appear to have much control over this data.  best I appear
			// to be able to do is grab it as a string right now so just
			// filtering out funcs, vars etc. with a simple string comparson.
			if strings.HasPrefix(scopeInfo, "type") {
				scopeInfo = strings.Replace(scopeInfo, packageName+".", "", -1)
				space := strings.Index(scopeInfo, " ")
				space = space + 1 + strings.Index(scopeInfo[space+1:], " ")
				fmt.Printf("* %s\n", scopeInfo[:space])
			}
		}

		fmt.Println("")
	}
}