func main()

in flexflate/gen.go [122:178]
52 lines of code
10 McCabe index (conditional complexity)

func main() {
	flag.Parse()

	var h huffmanDecoder
	var bits [288]int
	initReverseByte()
	for i := 0; i < 144; i++ {
		bits[i] = 8
	}
	for i := 144; i < 256; i++ {
		bits[i] = 9
	}
	for i := 256; i < 280; i++ {
		bits[i] = 7
	}
	for i := 280; i < 288; i++ {
		bits[i] = 8
	}
	h.init(bits[:])

	var buf bytes.Buffer

	fmt.Fprintf(&buf, `// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.`+"\n\n")

	fmt.Fprintln(&buf, "package flexflate")
	fmt.Fprintln(&buf)
	fmt.Fprintln(&buf, "// autogenerated by go run gen.go -output fixedhuff.go, DO NOT EDIT")
	fmt.Fprintln(&buf)
	fmt.Fprintln(&buf, "var fixedHuffmanDecoder = huffmanDecoder{")
	fmt.Fprintf(&buf, "\t%d,\n", h.min)
	fmt.Fprintln(&buf, "\t[huffmanNumChunks]uint32{")
	for i := 0; i < huffmanNumChunks; i++ {
		if i&7 == 0 {
			fmt.Fprintf(&buf, "\t\t")
		} else {
			fmt.Fprintf(&buf, " ")
		}
		fmt.Fprintf(&buf, "0x%04x,", h.chunks[i])
		if i&7 == 7 {
			fmt.Fprintln(&buf)
		}
	}
	fmt.Fprintln(&buf, "\t},")
	fmt.Fprintln(&buf, "\tnil, 0,")
	fmt.Fprintln(&buf, "}")

	data, err := format.Source(buf.Bytes())
	if err != nil {
		log.Fatal(err)
	}
	err = ioutil.WriteFile(*filename, data, 0644)
	if err != nil {
		log.Fatal(err)
	}
}