/
opts.go
71 lines (57 loc) · 1.63 KB
/
opts.go
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package main
import (
"errors"
"fmt"
"flag"
"regexp"
"os"
"encoding/json"
)
type Opts struct {
RegexpKey *regexp.Regexp
Key string
Filter map[string]interface{}
Or bool
Url string
Bucket string
Pool string
Stdin bool
}
var opts = Opts{}
func usageFunc() {
fmt.Fprintf(os.Stderr, "Usage of %s: \n", os.Args[0])
fmt.Fprintf(os.Stderr, "\t <-bucket name | -stdin> [-key regexp] [-filter JSON object] [-url url] [-or] [-pool name]\n\n")
flag.CommandLine.PrintDefaults()
}
func parseOpts() error {
flag.Usage = usageFunc
key := flag.String("key", "", "A POSIX regexp to filter a key. Doesn't affect -stdin filtering.")
filter := flag.String("filter", "{}", "A JSON object as filter: {\"username\": \"moon\"}.")
or := flag.Bool("or", false, "Filter on Key OR filter.")
url := flag.String("url", "http://localhost:8091", "Couchbase URL.")
bucket := flag.String("bucket", "", "Listen on Couchbase bucket name.")
pool := flag.String("pool", "default", "Couchbase pool name.")
stdin := flag.Bool("stdin", false, "Listen on stdin.")
flag.Parse()
if *bucket == "" && *stdin == false {
return errors.New("Either -stdin or -bucket has to be specified.")
}
opts.RegexpKey = regexp.MustCompilePOSIX(*key)
opts.Stdin = *stdin
opts.Url = *url
opts.Or = *or
opts.Pool = *pool
opts.Bucket = *bucket
opts.Key = *key
var v interface{}
err := json.Unmarshal([]byte(*filter), &v)
if err != nil {
return err
}
if filter, ok := v.(map[string]interface{}); ok {
opts.Filter = filter
} else {
return errors.New("Filter must be a JSON object.")
}
return nil
}