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// Copyright 2009 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.
package main
import (
"os";
"io";
"flag";
"fmt";
"tabwriter";
)
var (
usetabs = flag.Bool("usetabs", false, nil, "align with tabs instead of blanks");
tabwidth = flag.Int("tabwidth", 4, nil, "tab width");
)
func Error(format string, params ...) {
fmt.printf(format, params);
sys.exit(1);
}
func Untab(name string, src *os.FD, dst *tabwriter.TabWriter) {
n, err := io.Copy(src, dst);
if err != nil {
Error("error while processing %s (%v)", name, err);
}
//dst.Flush();
}
func main() {
flag.Parse();
dst := tabwriter.MakeTabWriter(os.Stdout, usetabs.BVal(), int(tabwidth.IVal()));
if flag.NArg() > 0 {
for i := 0; i < flag.NArg(); i++ {
name := flag.Arg(i);
src, err := os.Open(name, os.O_RDONLY, 0);
if err != nil {
Error("could not open %s (%v)\n", name, err);
}
Untab(name, src, dst);
src.Close(); // ignore errors
}
} else {
// no files => use stdin
Untab("/dev/stdin", os.Stdin, dst);
}
}
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