/
main.go
90 lines (78 loc) · 1.64 KB
/
main.go
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package main
import (
"errors"
"flag"
"fmt"
"os"
"runtime"
"github.com/itchyny/bed/cmdline"
"github.com/itchyny/bed/editor"
"github.com/itchyny/bed/tui"
"github.com/itchyny/bed/window"
)
const name = "bed"
const version = "0.2.4"
var revision = "HEAD"
func main() {
os.Exit(run(os.Args[1:]))
}
const (
exitCodeOK = iota
exitCodeErr
)
func run(args []string) int {
fs := flag.NewFlagSet(name, flag.ContinueOnError)
fs.SetOutput(os.Stderr)
fs.Usage = func() {
fs.SetOutput(os.Stdout)
fmt.Printf(`%[1]s - binary editor written in Go
Version: %s (rev: %s/%s)
Synopsis:
%% %[1]s file
Options:
`, name, version, revision, runtime.Version())
fs.PrintDefaults()
}
var showVersion bool
fs.BoolVar(&showVersion, "version", false, "print version")
if err := fs.Parse(args); err != nil {
if err == flag.ErrHelp {
return exitCodeOK
}
return exitCodeErr
}
if showVersion {
fmt.Printf("%s %s (rev: %s/%s)\n", name, version, revision, runtime.Version())
return exitCodeOK
}
if err := start(fs.Args()); err != nil {
if err, ok := err.(interface{ ExitCode() int }); ok {
return err.ExitCode()
}
fmt.Fprintf(os.Stderr, "%s: %s\n", name, err)
return exitCodeErr
}
return exitCodeOK
}
func start(args []string) error {
if len(args) > 1 {
return errors.New("too many files")
}
editor := editor.NewEditor(
tui.NewTui(), window.NewManager(), cmdline.NewCmdline(),
)
if err := editor.Init(); err != nil {
return err
}
if len(args) > 0 {
if err := editor.Open(args[0]); err != nil {
return err
}
} else {
if err := editor.OpenEmpty(); err != nil {
return err
}
}
defer editor.Close()
return editor.Run()
}