131 lines
3.2 KiB
Go
131 lines
3.2 KiB
Go
// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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// license. Its contents can be found at:
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// http://creativecommons.org/publicdomain/zero/1.0/
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package main
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import (
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"os"
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"flag"
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"fmt"
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"path"
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"strings"
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"runtime"
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"unicode"
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)
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const (
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APP_NAME = "bindata"
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APP_VERSION = "0.4"
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)
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func main() {
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in := flag.String("i", "", "Path to the input file. Alternatively, pipe the file data into stdin.")
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out := flag.String("o", "", "Optional path to the output file.")
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pkgname := flag.String("p", "", "Optional name of the package to generate.")
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funcname := flag.String("f", "", "Optional name of the function to generate.")
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version := flag.Bool("v", false, "Display version information.")
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flag.Parse()
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if *version {
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fmt.Fprintf(os.Stdout, "%s v%s (Go runtime %s)\n",
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APP_NAME, APP_VERSION, runtime.Version())
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return
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}
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pipe := len(*in) == 0
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if !pipe && len(*out) == 0 {
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// Ensure we create our own output filename that does not already exist.
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dir, file := path.Split(*in)
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*out = path.Join(dir, file) + ".go"
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if _, err := os.Lstat(*out); err == nil {
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// File already exists. Pad name with a sequential number until we
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// find a name that is available.
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count := 0
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for {
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f := path.Join(dir, fmt.Sprintf("%s.%d.go", file, count))
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if _, err := os.Lstat(f); err != nil {
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*out = f
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break
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}
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count++
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}
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}
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fmt.Fprintf(os.Stderr, "[w] No output file specified. Using '%s'.\n", *out)
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}
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if len(*pkgname) == 0 {
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fmt.Fprintln(os.Stderr, "[w] No package name specified. Using 'main'.")
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*pkgname = "main"
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} else {
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if unicode.IsDigit(rune((*pkgname)[0])) {
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// Identifier can't start with a digit.
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*pkgname = "_" + *pkgname
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}
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}
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if len(*funcname) == 0 {
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if pipe {
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// Can't infer from input file name in this mode.
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fmt.Fprintln(os.Stderr, "[e] No function name specified.")
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os.Exit(1)
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} else {
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_, file := path.Split(*in)
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file = strings.ToLower(file)
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file = strings.Replace(file, " ", "_", -1)
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file = strings.Replace(file, ".", "_", -1)
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file = strings.Replace(file, "-", "_", -1)
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if unicode.IsDigit(rune(file[0])) {
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// Identifier can't start with a digit.
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file = "_" + file
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}
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fmt.Fprintf(os.Stderr, "[w] No function name specified. Using '%s'.\n", file)
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*funcname = file
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}
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}
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// Read the input file, transform it into a gzip compressed data stream and
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// write it out as a go source file.
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var err os.Error
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if pipe {
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if err = translate(os.Stdin, os.Stdout, *pkgname, *funcname); err != nil {
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fmt.Fprintf(os.Stderr, "[e] %s\n", err)
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return
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}
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} else {
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var fs, fd *os.File
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if fs, err = os.Open(*in); err != nil {
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fmt.Fprintf(os.Stderr, "[e] %s\n", err)
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return
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}
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defer fs.Close()
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if fd, err = os.Create(*out); err != nil {
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fmt.Fprintf(os.Stderr, "[e] %s\n", err)
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return
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}
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defer fd.Close()
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if err = translate(fs, fd, *pkgname, *funcname); err != nil {
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fmt.Fprintf(os.Stderr, "[e] %s\n", err)
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return
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}
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// If gofmt exists on the system, use it to format the generated source file.
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if err = gofmt(*out); err != nil {
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fmt.Fprintf(os.Stderr, "[e] %s\n", err)
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return
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}
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fmt.Fprintln(os.Stdout, "[i] Done.")
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}
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}
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