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package main
import (
"github.com/wildducktheories/go-csv"
"flag"
"fmt"
"os"
)
func configure(args []string) (*csv.UniquifyProcess, error) {
var partialKey, additionalKey string
flags := flag.NewFlagSet("uniquify", flag.ContinueOnError)
flags.StringVar(&partialKey, "partial-key", "", "The fields of the partial key.")
flags.StringVar(&additionalKey, "additional-key", "", "The field name for the additional key.")
if err := flags.Parse(args); err != nil {
return nil, err
}
usage := func() {
fmt.Printf("usage: uniqify {options}\n")
flag.PrintDefaults()
}
// Use a CSV parser to extract the partial keys from the parameter
partialKeys, err := csv.Parse(partialKey)
if err != nil || len(partialKeys) < 1 {
usage()
return nil, fmt.Errorf("--partial-key must specify one or more columns")
}
if additionalKey == "" {
usage()
return nil, fmt.Errorf("--additional-key must specify the name of new column")
}
return &csv.UniquifyProcess{
PartialKeys: partialKeys,
AdditionalKey: additionalKey,
}, nil
}
func main() {
var p *csv.UniquifyProcess
var err error
var errCh = make(chan error, 1)
if p, err = configure(os.Args[1:]); err == nil {
p.Run(csv.WithIoReader(os.Stdin), csv.WithIoWriter(os.Stdout), errCh)
err = <-errCh
}
if err != nil {
fmt.Printf("fatal: %v\n", err)
os.Exit(1)
}
}
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