Automatically read from stdin if stdin is a pipe

This commit is contained in:
Christian Rocha 2021-10-21 10:40:37 -04:00
parent 8fc9a300a4
commit 8138788b0a

25
main.go
View file

@ -177,12 +177,33 @@ func validateOptions(cmd *cobra.Command) error {
return nil
}
func stdinIsPipe() (bool, error) {
stat, err := os.Stdin.Stat()
if err != nil {
return false, err
}
if stat.Mode()&os.ModeCharDevice == 0 || stat.Size() > 0 {
return true, nil
}
return false, nil
}
func execute(cmd *cobra.Command, args []string) error {
initConfig()
if err := validateOptions(cmd); err != nil {
return err
}
// if stdin is a pipe then use stdin for input. note that you can also
// explicitly use a - to read from stdin.
if yes, err := stdinIsPipe(); err != nil {
return err
} else if yes {
src := &source{reader: os.Stdin}
defer src.reader.Close()
return executeCLI(cmd, src, os.Stdout)
}
switch len(args) {
// TUI running on cwd
@ -221,6 +242,10 @@ func executeArg(cmd *cobra.Command, arg string, w io.Writer) error {
return err
}
defer src.reader.Close()
return executeCLI(cmd, src, w)
}
func executeCLI(cmd *cobra.Command, src *source, w io.Writer) error {
b, err := ioutil.ReadAll(src.reader)
if err != nil {
return err