bindata/main.go

94 lines
2.3 KiB
Go

// Copyright (c) 2010, Jim Teeuwen. All rights reserved.
// This code is subject to a 1-clause BSD license.
// See the LICENSE file for its contents.
package main
import (
"os"
"flag"
"fmt"
"path"
"strings"
"runtime"
)
const (
APP_NAME = "bindata"
APP_VERSION = "0.2"
)
func main() {
in := flag.String("i", "", "Path to the input file.")
out := flag.String("o", "", "Optional path to the output file.")
pkgname := flag.String("p", "", "Optional name of the package to generate.")
funcname := flag.String("f", "", "Optional name of the function to generate.")
version := flag.Bool("v", false, "Display version information.")
flag.Parse()
if *version {
fmt.Fprintf(os.Stdout, "%s v%s (Go runtime %s)\n",
APP_NAME, APP_VERSION, runtime.Version())
return
}
if len(*in) == 0 {
fmt.Fprintln(os.Stderr, "[e] No input file specified.")
os.Exit(1)
}
if len(*out) == 0 {
// Ensure we create our own output filename that does not already exist.
dir, file := path.Split(*in)
*out = path.Join(dir, file) + ".go"
if _, err := os.Lstat(*out); err == nil {
// File already exists. Pad name with a sequential number until we
// find a name that is available.
count := 0
for {
f := path.Join(dir, fmt.Sprintf("%s.%d.go", file, count))
if _, err := os.Lstat(f); err != nil {
*out = f
break
}
count++
}
}
fmt.Fprintf(os.Stderr, "[w] No output file specified. Using '%s'.\n", *out)
}
if len(*pkgname) == 0 {
fmt.Fprintln(os.Stderr, "[w] No package name specified. Using 'main'.")
*pkgname = "main"
}
if len(*funcname) == 0 {
_, file := path.Split(*in)
file = strings.ToLower(file)
file = strings.Replace(file, " ", "_", -1)
file = strings.Replace(file, ".", "_", -1)
file = strings.Replace(file, "-", "_", -1)
fmt.Fprintf(os.Stderr, "[w] No function name specified. Using '%s'.\n", file)
*funcname = file
}
// Read the input file, transform it into a gzip compressed data stream and
// write it out as a go source file.
if err := translate(*in, *out, *pkgname, *funcname); err != nil {
fmt.Fprintf(os.Stderr, "[e] %s\n", err)
return
}
// If gofmt exists on the system, use it to format the generated source file.
if err := gofmt(*out); err != nil {
fmt.Fprintf(os.Stderr, "[e] %s\n", err)
os.Exit(1)
}
fmt.Fprintln(os.Stdout, "[i] Done.")
}