motiejus/undocker
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stdout is -

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Motiejus Jakštys 2021-05-24 00:11:58 +03:00
parent f9eea46417
commit ce8ce9f59e
1 changed files with 10 additions and 4 deletions
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14
main.go
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@ -37,7 +37,7 @@ func run(args []string) error {
type cmdRootFS struct { type cmdRootFS struct {
PositionalArgs struct { PositionalArgs struct {
Infile goflags.Filename `long:"infile" description:"Input tarball"` Infile goflags.Filename `long:"infile" description:"Input tarball"`
Outfile string `long:"outfile" description:"Output tarball (flattened file system)"` Outfile string `long:"outfile" description:"Output path, stdout is '-'"`
} `positional-args:"yes" required:"yes"` } `positional-args:"yes" required:"yes"`
} }
@ -54,9 +54,15 @@ func (r *cmdRootFS) Execute(args []string) (err error) {
err = multierr.Append(err, in.Close()) err = multierr.Append(err, in.Close())
}() }()
out, err := os.Create(string(r.PositionalArgs.Outfile)) var out *os.File
if err != nil { outf := string(r.PositionalArgs.Outfile)
return err if outf == "-" {
out = os.Stdout
} else {
out, err = os.Create(outf)
if err != nil {
return err
}
} }
defer func() { defer func() {
err = multierr.Append(err, out.Close()) err = multierr.Append(err, out.Close())