TUN-4961: Update quic-go to latest

- Updates fips-go to be the latest on cfsetup.yaml
- Updates sumtype's x/tools to be latest to avoid Internal: nil pkg
  errors with fips.

vendor/github.com/cheekybits/genny/.gitignore

@@ -0,0 +1,26 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+
+genny

vendor/github.com/cheekybits/genny/.travis.yml

@@ -0,0 +1,6 @@
+language: go
+
+go:
+  - 1.7
+  - 1.8
+  - 1.9

vendor/github.com/cheekybits/genny/README.md

@@ -0,0 +1,245 @@
+# genny - Generics for Go
+
+[![Build Status](https://travis-ci.org/cheekybits/genny.svg?branch=master)](https://travis-ci.org/cheekybits/genny) [![GoDoc](https://godoc.org/github.com/cheekybits/genny/parse?status.png)](http://godoc.org/github.com/cheekybits/genny/parse)
+
+Install:
+
+```
+go get github.com/cheekybits/genny
+```
+
+=====
+
+(pron. Jenny) by Mat Ryer ([@matryer](https://twitter.com/matryer)) and Tyler Bunnell ([@TylerJBunnell](https://twitter.com/TylerJBunnell)).
+
+Until the Go core team include support for [generics in Go](http://golang.org/doc/faq#generics), `genny` is a code-generation generics solution. It allows you write normal buildable and testable Go code which, when processed by the `genny gen` tool, will replace the generics with specific types.
+
+  * Generic code is valid Go code
+  * Generic code compiles and can be tested
+  * Use `stdin` and `stdout` or specify in and out files
+  * Supports Go 1.4's [go generate](http://tip.golang.org/doc/go1.4#gogenerate)
+  * Multiple specific types will generate every permutation
+  * Use `BUILTINS` and `NUMBERS` wildtype to generate specific code for all built-in (and number) Go types
+  * Function names and comments also get updated
+
+## Library
+
+We have started building a [library of common things](https://github.com/cheekybits/gennylib), and you can use `genny get` to generate the specific versions you need.
+
+For example: `genny get maps/concurrentmap.go "KeyType=BUILTINS ValueType=BUILTINS"` will print out generated code for all types for a concurrent map. Any file in the library may be generated locally in this way using all the same options given to `genny gen`.
+
+## Usage
+
+```
+genny [{flags}] gen "{types}"
+
+gen - generates type specific code from generic code.
+get <package/file> - fetch a generic template from the online library and gen it.
+
+{flags}  - (optional) Command line flags (see below)
+{types}  - (required) Specific types for each generic type in the source
+{types} format:  {generic}={specific}[,another][ {generic2}={specific2}]
+
+Examples:
+  Generic=Specific
+  Generic1=Specific1 Generic2=Specific2
+  Generic1=Specific1,Specific2 Generic2=Specific3,Specific4
+
+Flags:
+  -in="": file to parse instead of stdin
+  -out="": file to save output to instead of stdout
+  -pkg="": package name for generated files
+```
+
+  * Comma separated type lists will generate code for each type
+
+### Flags
+
+  * `-in` - specify the input file (rather than using stdin)
+  * `-out` - specify the output file (rather than using stdout)
+
+### go generate
+
+To use Go 1.4's `go generate` capability, insert the following comment in your source code file:
+
+```
+//go:generate genny -in=$GOFILE -out=gen-$GOFILE gen "KeyType=string,int ValueType=string,int"
+```
+
+  * Start the line with `//go:generate `
+  * Use the `-in` and `-out` flags to specify the files to work on
+  * Use the `genny` command as usual after the flags
+
+Now, running `go generate` (in a shell) for the package will cause the generic versions of the files to be generated.
+
+  * The output file will be overwritten, so it's safe to call `go generate` many times
+  * Use `$GOFILE` to refer to the current file
+  * The `//go:generate` line will be removed from the output
+
+To see a real example of how to use `genny` with `go generate`, look in the [example/go-generate directory](https://github.com/cheekybits/genny/tree/master/examples/go-generate).
+
+## How it works
+
+Define your generic types using the special `generic.Type` placeholder type:
+
+```go
+type KeyType generic.Type
+type ValueType generic.Type
+```
+
+  * You can use as many as you like
+  * Give them meaningful names
+
+Then write the generic code referencing the types as your normally would:
+
+```go
+func SetValueTypeForKeyType(key KeyType, value ValueType) { /* ... */ }
+```
+
+  * Generic type names will also be replaced in comments and function names (see Real example below)
+
+Since `generic.Type` is a real Go type, your code will compile, and you can even write unit tests against your generic code.
+
+#### Generating specific versions
+
+Pass the file through the `genny gen` tool with the specific types as the argument:
+
+```
+cat generic.go | genny gen "KeyType=string ValueType=interface{}"
+```
+
+The output will be the complete Go source file with the generic types replaced with the types specified in the arguments.
+
+## Real example
+
+Given [this generic Go code](https://github.com/cheekybits/genny/tree/master/examples/queue) which compiles and is tested:
+
+```go
+package queue
+
+import "github.com/cheekybits/genny/generic"
+
+// NOTE: this is how easy it is to define a generic type
+type Something generic.Type
+
+// SomethingQueue is a queue of Somethings.
+type SomethingQueue struct {
+  items []Something
+}
+
+func NewSomethingQueue() *SomethingQueue {
+  return &SomethingQueue{items: make([]Something, 0)}
+}
+func (q *SomethingQueue) Push(item Something) {
+  q.items = append(q.items, item)
+}
+func (q *SomethingQueue) Pop() Something {
+  item := q.items[0]
+  q.items = q.items[1:]
+  return item
+}
+```
+
+When `genny gen` is invoked like this:
+
+```
+cat source.go | genny gen "Something=string"
+```
+
+It outputs:
+
+```go
+// This file was automatically generated by genny.
+// Any changes will be lost if this file is regenerated.
+// see https://github.com/cheekybits/genny
+
+package queue
+
+// StringQueue is a queue of Strings.
+type StringQueue struct {
+  items []string
+}
+
+func NewStringQueue() *StringQueue {
+  return &StringQueue{items: make([]string, 0)}
+}
+func (q *StringQueue) Push(item string) {
+  q.items = append(q.items, item)
+}
+func (q *StringQueue) Pop() string {
+  item := q.items[0]
+  q.items = q.items[1:]
+  return item
+}
+```
+
+To get a _something_ for every built-in Go type plus one of your own types, you could run:
+
+```
+cat source.go | genny gen "Something=BUILTINS,*MyType"
+```
+
+#### More examples
+
+Check out the [test code files](https://github.com/cheekybits/genny/tree/master/parse/test) for more real examples.
+
+## Writing test code
+
+Once you have defined a generic type with some code worth testing:
+
+```go
+package slice
+
+import (
+  "log"
+  "reflect"
+
+  "github.com/stretchr/gogen/generic"
+)
+
+type MyType generic.Type
+
+func EnsureMyTypeSlice(objectOrSlice interface{}) []MyType {
+  log.Printf("%v", reflect.TypeOf(objectOrSlice))
+  switch obj := objectOrSlice.(type) {
+  case []MyType:
+    log.Println("  returning it untouched")
+    return obj
+  case MyType:
+    log.Println("  wrapping in slice")
+    return []MyType{obj}
+  default:
+    panic("ensure slice needs MyType or []MyType")
+  }
+}
+```
+
+You can treat it like any normal Go type in your test code:
+
+```go
+func TestEnsureMyTypeSlice(t *testing.T) {
+
+  myType := new(MyType)
+  slice := EnsureMyTypeSlice(myType)
+  if assert.NotNil(t, slice) {
+    assert.Equal(t, slice[0], myType)
+  }
+
+  slice = EnsureMyTypeSlice(slice)
+  log.Printf("%#v", slice[0])
+  if assert.NotNil(t, slice) {
+    assert.Equal(t, slice[0], myType)
+  }
+
+}
+```
+
+### Understanding what `generic.Type` is
+
+Because `generic.Type` is an empty interface type (literally `interface{}`) every other type will be considered to be a `generic.Type` if you are switching on the type of an object. Of course, once the specific versions are generated, this issue goes away but it's worth knowing when you are writing your tests against generic code.
+
+### Contributions
+
+  * See the [API documentation for the parse package](http://godoc.org/github.com/cheekybits/genny/parse)
+  * Please do TDD
+  * All input welcome

vendor/github.com/cheekybits/genny/doc.go

@@ -0,0 +1,2 @@
+// Package main is the command line tool for Genny.
+package main

vendor/github.com/cheekybits/genny/main.go

@@ -0,0 +1,154 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/cheekybits/genny/out"
+	"github.com/cheekybits/genny/parse"
+)
+
+/*
+
+  source | genny gen [-in=""] [-out=""] [-pkg=""] "KeyType=string,int ValueType=string,int"
+
+*/
+
+const (
+	_ = iota
+	exitcodeInvalidArgs
+	exitcodeInvalidTypeSet
+	exitcodeStdinFailed
+	exitcodeGenFailed
+	exitcodeGetFailed
+	exitcodeSourceFileInvalid
+	exitcodeDestFileFailed
+)
+
+func main() {
+	var (
+		in      = flag.String("in", "", "file to parse instead of stdin")
+		out     = flag.String("out", "", "file to save output to instead of stdout")
+		pkgName = flag.String("pkg", "", "package name for generated files")
+		prefix  = "https://github.com/metabition/gennylib/raw/master/"
+	)
+	flag.Parse()
+	args := flag.Args()
+
+	if len(args) < 2 {
+		usage()
+		os.Exit(exitcodeInvalidArgs)
+	}
+
+	if strings.ToLower(args[0]) != "gen" && strings.ToLower(args[0]) != "get" {
+		usage()
+		os.Exit(exitcodeInvalidArgs)
+	}
+
+	// parse the typesets
+	var setsArg = args[1]
+	if strings.ToLower(args[0]) == "get" {
+		setsArg = args[2]
+	}
+	typeSets, err := parse.TypeSet(setsArg)
+	if err != nil {
+		fatal(exitcodeInvalidTypeSet, err)
+	}
+
+	outWriter := newWriter(*out)
+
+	if strings.ToLower(args[0]) == "get" {
+		if len(args) != 3 {
+			fmt.Println("not enough arguments to get")
+			usage()
+			os.Exit(exitcodeInvalidArgs)
+		}
+		r, err := http.Get(prefix + args[1])
+		if err != nil {
+			fatal(exitcodeGetFailed, err)
+		}
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			fatal(exitcodeGetFailed, err)
+		}
+		r.Body.Close()
+		br := bytes.NewReader(b)
+		err = gen(*in, *pkgName, br, typeSets, outWriter)
+	} else if len(*in) > 0 {
+		var file *os.File
+		file, err = os.Open(*in)
+		if err != nil {
+			fatal(exitcodeSourceFileInvalid, err)
+		}
+		defer file.Close()
+		err = gen(*in, *pkgName, file, typeSets, outWriter)
+	} else {
+		var source []byte
+		source, err = ioutil.ReadAll(os.Stdin)
+		if err != nil {
+			fatal(exitcodeStdinFailed, err)
+		}
+		reader := bytes.NewReader(source)
+		err = gen("stdin", *pkgName, reader, typeSets, outWriter)
+	}
+
+	// do the work
+	if err != nil {
+		fatal(exitcodeGenFailed, err)
+	}
+
+}
+
+func usage() {
+	fmt.Fprintln(os.Stderr, `usage: genny [{flags}] gen "{types}"
+
+gen - generates type specific code from generic code.
+get <package/file> - fetch a generic template from the online library and gen it.
+
+{flags}  - (optional) Command line flags (see below)
+{types}  - (required) Specific types for each generic type in the source
+{types} format:  {generic}={specific}[,another][ {generic2}={specific2}]
+
+Examples:
+  Generic=Specific
+  Generic1=Specific1 Generic2=Specific2
+  Generic1=Specific1,Specific2 Generic2=Specific3,Specific4
+
+Flags:`)
+	flag.PrintDefaults()
+}
+
+func newWriter(fileName string) io.Writer {
+	if fileName == "" {
+		return os.Stdout
+	}
+	lf := &out.LazyFile{FileName: fileName}
+	defer lf.Close()
+	return lf
+}
+
+func fatal(code int, a ...interface{}) {
+	fmt.Println(a...)
+	os.Exit(code)
+}
+
+// gen performs the generic generation.
+func gen(filename, pkgName string, in io.ReadSeeker, typesets []map[string]string, out io.Writer) error {
+
+	var output []byte
+	var err error
+
+	output, err = parse.Generics(filename, pkgName, in, typesets)
+	if err != nil {
+		return err
+	}
+
+	out.Write(output)
+	return nil
+}

vendor/github.com/cheekybits/genny/out/lazy_file.go

@@ -0,0 +1,38 @@
+package out
+
+import (
+	"os"
+	"path"
+)
+
+// LazyFile is an io.WriteCloser which defers creation of the file it is supposed to write in
+// till the first call to its write function in order to prevent creation of file, if no write
+// is supposed to happen.
+type LazyFile struct {
+	// FileName is path to the file to which genny will write.
+	FileName string
+	file     *os.File
+}
+
+// Close closes the file if it is created. Returns nil if no file is created.
+func (lw *LazyFile) Close() error {
+	if lw.file != nil {
+		return lw.file.Close()
+	}
+	return nil
+}
+
+// Write writes to the specified file and creates the file first time it is called.
+func (lw *LazyFile) Write(p []byte) (int, error) {
+	if lw.file == nil {
+		err := os.MkdirAll(path.Dir(lw.FileName), 0755)
+		if err != nil {
+			return 0, err
+		}
+		lw.file, err = os.Create(lw.FileName)
+		if err != nil {
+			return 0, err
+		}
+	}
+	return lw.file.Write(p)
+}

vendor/github.com/cheekybits/genny/parse/builtins.go

@@ -0,0 +1,41 @@
+package parse
+
+// Builtins contains a slice of all built-in Go types.
+var Builtins = []string{
+	"bool",
+	"byte",
+	"complex128",
+	"complex64",
+	"error",
+	"float32",
+	"float64",
+	"int",
+	"int16",
+	"int32",
+	"int64",
+	"int8",
+	"rune",
+	"string",
+	"uint",
+	"uint16",
+	"uint32",
+	"uint64",
+	"uint8",
+	"uintptr",
+}
+
+// Numbers contains a slice of all built-in number types.
+var Numbers = []string{
+	"float32",
+	"float64",
+	"int",
+	"int16",
+	"int32",
+	"int64",
+	"int8",
+	"uint",
+	"uint16",
+	"uint32",
+	"uint64",
+	"uint8",
+}

vendor/github.com/cheekybits/genny/parse/doc.go

@@ -0,0 +1,14 @@
+// Package parse contains the generic code generation capabilities
+// that power genny.
+//
+//     genny gen "{types}"
+//
+//     gen - generates type specific code (to stdout) from generic code (via stdin)
+//
+//     {types}  - (required) Specific types for each generic type in the source
+//     {types} format:  {generic}={specific}[,another][ {generic2}={specific2}]
+//     Examples:
+//       Generic=Specific
+//       Generic1=Specific1 Generic2=Specific2
+//       Generic1=Specific1,Specific2 Generic2=Specific3,Specific4
+package parse

vendor/github.com/cheekybits/genny/parse/errors.go

@@ -0,0 +1,47 @@
+package parse
+
+import (
+	"errors"
+)
+
+// errMissingSpecificType represents an error when a generic type is not
+// satisfied by a specific type.
+type errMissingSpecificType struct {
+	GenericType string
+}
+
+// Error gets a human readable string describing this error.
+func (e errMissingSpecificType) Error() string {
+	return "Missing specific type for '" + e.GenericType + "' generic type"
+}
+
+// errImports represents an error from goimports.
+type errImports struct {
+	Err error
+}
+
+// Error gets a human readable string describing this error.
+func (e errImports) Error() string {
+	return "Failed to goimports the generated code: " + e.Err.Error()
+}
+
+// errSource represents an error with the source file.
+type errSource struct {
+	Err error
+}
+
+// Error gets a human readable string describing this error.
+func (e errSource) Error() string {
+	return "Failed to parse source file: " + e.Err.Error()
+}
+
+type errBadTypeArgs struct {
+	Message string
+	Arg     string
+}
+
+func (e errBadTypeArgs) Error() string {
+	return "\"" + e.Arg + "\" is bad: " + e.Message
+}
+
+var errMissingTypeInformation = errors.New("No type arguments were specified and no \"// +gogen\" tag was found in the source.")

vendor/github.com/cheekybits/genny/parse/parse.go

@@ -0,0 +1,298 @@
+package parse
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/scanner"
+	"go/token"
+	"io"
+	"os"
+	"strings"
+	"unicode"
+
+	"golang.org/x/tools/imports"
+)
+
+var header = []byte(`
+
+// This file was automatically generated by genny.
+// Any changes will be lost if this file is regenerated.
+// see https://github.com/cheekybits/genny
+
+`)
+
+var (
+	packageKeyword = []byte("package")
+	importKeyword  = []byte("import")
+	openBrace      = []byte("(")
+	closeBrace     = []byte(")")
+	genericPackage = "generic"
+	genericType    = "generic.Type"
+	genericNumber  = "generic.Number"
+	linefeed       = "\r\n"
+)
+var unwantedLinePrefixes = [][]byte{
+	[]byte("//go:generate genny "),
+}
+
+func subIntoLiteral(lit, typeTemplate, specificType string) string {
+	if lit == typeTemplate {
+		return specificType
+	}
+	if !strings.Contains(lit, typeTemplate) {
+		return lit
+	}
+	specificLg := wordify(specificType, true)
+	specificSm := wordify(specificType, false)
+	result := strings.Replace(lit, typeTemplate, specificLg, -1)
+	if strings.HasPrefix(result, specificLg) && !isExported(lit) {
+		return strings.Replace(result, specificLg, specificSm, 1)
+	}
+	return result
+}
+
+func subTypeIntoComment(line, typeTemplate, specificType string) string {
+	var subbed string
+	for _, w := range strings.Fields(line) {
+		subbed = subbed + subIntoLiteral(w, typeTemplate, specificType) + " "
+	}
+	return subbed
+}
+
+// Does the heavy lifting of taking a line of our code and
+// sbustituting a type into there for our generic type
+func subTypeIntoLine(line, typeTemplate, specificType string) string {
+	src := []byte(line)
+	var s scanner.Scanner
+	fset := token.NewFileSet()
+	file := fset.AddFile("", fset.Base(), len(src))
+	s.Init(file, src, nil, scanner.ScanComments)
+	output := ""
+	for {
+		_, tok, lit := s.Scan()
+		if tok == token.EOF {
+			break
+		} else if tok == token.COMMENT {
+			subbed := subTypeIntoComment(lit, typeTemplate, specificType)
+			output = output + subbed + " "
+		} else if tok.IsLiteral() {
+			subbed := subIntoLiteral(lit, typeTemplate, specificType)
+			output = output + subbed + " "
+		} else {
+			output = output + tok.String() + " "
+		}
+	}
+	return output
+}
+
+// typeSet looks like "KeyType: int, ValueType: string"
+func generateSpecific(filename string, in io.ReadSeeker, typeSet map[string]string) ([]byte, error) {
+
+	// ensure we are at the beginning of the file
+	in.Seek(0, os.SEEK_SET)
+
+	// parse the source file
+	fs := token.NewFileSet()
+	file, err := parser.ParseFile(fs, filename, in, 0)
+	if err != nil {
+		return nil, &errSource{Err: err}
+	}
+
+	// make sure every generic.Type is represented in the types
+	// argument.
+	for _, decl := range file.Decls {
+		switch it := decl.(type) {
+		case *ast.GenDecl:
+			for _, spec := range it.Specs {
+				ts, ok := spec.(*ast.TypeSpec)
+				if !ok {
+					continue
+				}
+				switch tt := ts.Type.(type) {
+				case *ast.SelectorExpr:
+					if name, ok := tt.X.(*ast.Ident); ok {
+						if name.Name == genericPackage {
+							if _, ok := typeSet[ts.Name.Name]; !ok {
+								return nil, &errMissingSpecificType{GenericType: ts.Name.Name}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	in.Seek(0, os.SEEK_SET)
+
+	var buf bytes.Buffer
+
+	comment := ""
+	scanner := bufio.NewScanner(in)
+	for scanner.Scan() {
+
+		line := scanner.Text()
+
+		// does this line contain generic.Type?
+		if strings.Contains(line, genericType) || strings.Contains(line, genericNumber) {
+			comment = ""
+			continue
+		}
+
+		for t, specificType := range typeSet {
+			if strings.Contains(line, t) {
+				newLine := subTypeIntoLine(line, t, specificType)
+				line = newLine
+			}
+		}
+
+		if comment != "" {
+			buf.WriteString(makeLine(comment))
+			comment = ""
+		}
+
+		// is this line a comment?
+		// TODO: should we handle /* */ comments?
+		if strings.HasPrefix(line, "//") {
+			// record this line to print later
+			comment = line
+			continue
+		}
+
+		// write the line
+		buf.WriteString(makeLine(line))
+	}
+
+	// write it out
+	return buf.Bytes(), nil
+}
+
+// Generics parses the source file and generates the bytes replacing the
+// generic types for the keys map with the specific types (its value).
+func Generics(filename, pkgName string, in io.ReadSeeker, typeSets []map[string]string) ([]byte, error) {
+
+	totalOutput := header
+
+	for _, typeSet := range typeSets {
+
+		// generate the specifics
+		parsed, err := generateSpecific(filename, in, typeSet)
+		if err != nil {
+			return nil, err
+		}
+
+		totalOutput = append(totalOutput, parsed...)
+
+	}
+
+	// clean up the code line by line
+	packageFound := false
+	insideImportBlock := false
+	var cleanOutputLines []string
+	scanner := bufio.NewScanner(bytes.NewReader(totalOutput))
+	for scanner.Scan() {
+
+		// end of imports block?
+		if insideImportBlock {
+			if bytes.HasSuffix(scanner.Bytes(), closeBrace) {
+				insideImportBlock = false
+			}
+			continue
+		}
+
+		if bytes.HasPrefix(scanner.Bytes(), packageKeyword) {
+			if packageFound {
+				continue
+			} else {
+				packageFound = true
+			}
+		} else if bytes.HasPrefix(scanner.Bytes(), importKeyword) {
+			if bytes.HasSuffix(scanner.Bytes(), openBrace) {
+				insideImportBlock = true
+			}
+			continue
+		}
+
+		// check all unwantedLinePrefixes - and skip them
+		skipline := false
+		for _, prefix := range unwantedLinePrefixes {
+			if bytes.HasPrefix(scanner.Bytes(), prefix) {
+				skipline = true
+				continue
+			}
+		}
+
+		if skipline {
+			continue
+		}
+
+		cleanOutputLines = append(cleanOutputLines, makeLine(scanner.Text()))
+	}
+
+	cleanOutput := strings.Join(cleanOutputLines, "")
+
+	output := []byte(cleanOutput)
+	var err error
+
+	// change package name
+	if pkgName != "" {
+		output = changePackage(bytes.NewReader([]byte(output)), pkgName)
+	}
+	// fix the imports
+	output, err = imports.Process(filename, output, nil)
+	if err != nil {
+		return nil, &errImports{Err: err}
+	}
+
+	return output, nil
+}
+
+func makeLine(s string) string {
+	return fmt.Sprintln(strings.TrimRight(s, linefeed))
+}
+
+// isAlphaNumeric gets whether the rune is alphanumeric or _.
+func isAlphaNumeric(r rune) bool {
+	return r == '_' || unicode.IsLetter(r) || unicode.IsDigit(r)
+}
+
+// wordify turns a type into a nice word for function and type
+// names etc.
+func wordify(s string, exported bool) string {
+	s = strings.TrimRight(s, "{}")
+	s = strings.TrimLeft(s, "*&")
+	s = strings.Replace(s, ".", "", -1)
+	if !exported {
+		return s
+	}
+	return strings.ToUpper(string(s[0])) + s[1:]
+}
+
+func changePackage(r io.Reader, pkgName string) []byte {
+	var out bytes.Buffer
+	sc := bufio.NewScanner(r)
+	done := false
+
+	for sc.Scan() {
+		s := sc.Text()
+
+		if !done && strings.HasPrefix(s, "package") {
+			parts := strings.Split(s, " ")
+			parts[1] = pkgName
+			s = strings.Join(parts, " ")
+			done = true
+		}
+
+		fmt.Fprintln(&out, s)
+	}
+	return out.Bytes()
+}
+
+func isExported(lit string) bool {
+	if len(lit) == 0 {
+		return false
+	}
+	return unicode.IsUpper(rune(lit[0]))
+}

vendor/github.com/cheekybits/genny/parse/typesets.go

@@ -0,0 +1,89 @@
+package parse
+
+import "strings"
+
+const (
+	typeSep     = " "
+	keyValueSep = "="
+	valuesSep   = ","
+	builtins    = "BUILTINS"
+	numbers     = "NUMBERS"
+)
+
+// TypeSet turns a type string into a []map[string]string
+// that can be given to parse.Generics for it to do its magic.
+//
+// Acceptable args are:
+//
+//     Person=man
+//     Person=man Animal=dog
+//     Person=man Animal=dog Animal2=cat
+//     Person=man,woman Animal=dog,cat
+//     Person=man,woman,child Animal=dog,cat Place=london,paris
+func TypeSet(arg string) ([]map[string]string, error) {
+
+	types := make(map[string][]string)
+	var keys []string
+	for _, pair := range strings.Split(arg, typeSep) {
+		segs := strings.Split(pair, keyValueSep)
+		if len(segs) != 2 {
+			return nil, &errBadTypeArgs{Arg: arg, Message: "Generic=Specific expected"}
+		}
+		key := segs[0]
+		keys = append(keys, key)
+		types[key] = make([]string, 0)
+		for _, t := range strings.Split(segs[1], valuesSep) {
+			if t == builtins {
+				types[key] = append(types[key], Builtins...)
+			} else if t == numbers {
+				types[key] = append(types[key], Numbers...)
+			} else {
+				types[key] = append(types[key], t)
+			}
+		}
+	}
+
+	cursors := make(map[string]int)
+	for _, key := range keys {
+		cursors[key] = 0
+	}
+
+	outChan := make(chan map[string]string)
+	go func() {
+		buildTypeSet(keys, 0, cursors, types, outChan)
+		close(outChan)
+	}()
+
+	var typeSets []map[string]string
+	for typeSet := range outChan {
+		typeSets = append(typeSets, typeSet)
+	}
+
+	return typeSets, nil
+
+}
+
+func buildTypeSet(keys []string, keyI int, cursors map[string]int, types map[string][]string, out chan<- map[string]string) {
+	key := keys[keyI]
+	for cursors[key] < len(types[key]) {
+		if keyI < len(keys)-1 {
+			buildTypeSet(keys, keyI+1, copycursors(cursors), types, out)
+		} else {
+			// build the typeset for this combination
+			ts := make(map[string]string)
+			for k, vals := range types {
+				ts[k] = vals[cursors[k]]
+			}
+			out <- ts
+		}
+		cursors[key]++
+	}
+}
+
+func copycursors(source map[string]int) map[string]int {
+	copy := make(map[string]int)
+	for k, v := range source {
+		copy[k] = v
+	}
+	return copy
+}