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main.go
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main.go
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package main
import (
"log"
"os"
"strings"
"github.com/elwin/table/pkg"
"github.com/pkg/errors"
"github.com/spf13/pflag"
)
func main() {
if err := run(); err != nil {
log.Fatal(err)
}
}
func run() error {
format := pflag.StringP("format", "f", "csv", "Format, supported values: csv, json")
input := pflag.StringP("input-file", "i", "", "Read input from file")
pflag.Parse()
var parser pkg.Parser
switch strings.ToLower(*format) {
case "csv":
parser = pkg.CSVParser{}
case "json":
parser = pkg.JSONParser{}
default:
return errors.Errorf(`"%s" is not a supported parser`, *format)
}
in := os.Stdin
if *input != "" {
inputFile, err := os.Open(*input)
if err != nil {
return errors.Wrap(err, "failed to open file")
}
in = inputFile
}
err := pkg.Format(parser, in, os.Stdout)
if err != nil {
return err
}
return nil
}