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65 lines
1.1 KiB
Go

package main
import (
"flag"
"fmt"
"io"
"os"
"path/filepath"
"strings"
)
func ensureNewline(t string) string {
if strings.HasSuffix(t, "\n") {
return t
}
return t + "\n"
}
func usage(t string, args ...interface{}) {
t = ensureNewline(t) + "\n"
fmt.Fprintf(os.Stderr, t, args...)
fmt.Fprintln(os.Stderr, "Usage:")
fmt.Fprintln(os.Stderr, "\thyperstone replay-id")
os.Exit(1)
}
func bail(status int, t string, args ...interface{}) {
var out io.Writer
if status == 0 {
out = os.Stdout
} else {
out = os.Stderr
}
fmt.Fprintf(out, ensureNewline(t), args...)
os.Exit(status)
}
func openReplayFile(path string) (io.ReadCloser, error) {
fi, err := os.Open(path)
if err != nil {
return nil, fmt.Errorf("unable to open replay file: %v", err)
}
switch filepath.Ext(path) {
case ".bz2":
return newBzipCloser(fi), nil
default:
return fi, nil
}
return nil, io.EOF
}
func main() {
flag.Parse()
if flag.NArg() != 1 {
usage("please supply the path to a valid replay file")
}
f, err := openReplayFile(flag.Arg(0))
if err != nil {
bail(1, "unable to open replay file: %v", err)
}
defer f.Close()
}