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util.go
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util.go
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// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package command
import (
"errors"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
"github.com/coreos/etcd/pkg/transport"
)
var (
ErrNoAvailSrc = errors.New("no available argument and stdin")
)
// trimsplit slices s into all substrings separated by sep and returns a
// slice of the substrings between the separator with all leading and trailing
// white space removed, as defined by Unicode.
func trimsplit(s, sep string) []string {
raw := strings.Split(s, ",")
trimmed := make([]string, 0)
for _, r := range raw {
trimmed = append(trimmed, strings.TrimSpace(r))
}
return trimmed
}
func argOrStdin(args []string, stdin io.Reader, i int) (string, error) {
if i < len(args) {
return args[i], nil
}
bytes, err := ioutil.ReadAll(stdin)
if string(bytes) == "" || err != nil {
return "", ErrNoAvailSrc
}
return string(bytes), nil
}
func getPeersFlagValue(c *cli.Context) []string {
peerstr := c.GlobalString("peers")
// Use an environment variable if nothing was supplied on the
// command line
if peerstr == "" {
peerstr = os.Getenv("ETCDCTL_PEERS")
}
// If we still don't have peers, use a default
if peerstr == "" {
peerstr = "127.0.0.1:4001"
}
return strings.Split(peerstr, ",")
}
func getEndpoints(c *cli.Context) ([]string, error) {
eps := getPeersFlagValue(c)
for i, ep := range eps {
u, err := url.Parse(ep)
if err != nil {
return nil, err
}
if u.Scheme == "" {
u.Scheme = "http"
}
eps[i] = u.String()
}
return eps, nil
}
func getTransport(c *cli.Context) (*http.Transport, error) {
cafile := c.GlobalString("ca-file")
certfile := c.GlobalString("cert-file")
keyfile := c.GlobalString("key-file")
// Use an environment variable if nothing was supplied on the
// command line
if cafile == "" {
cafile = os.Getenv("ETCDCTL_CA_FILE")
}
if certfile == "" {
certfile = os.Getenv("ETCDCTL_CERT_FILE")
}
if keyfile == "" {
keyfile = os.Getenv("ETCDCTL_KEY_FILE")
}
tls := transport.TLSInfo{
CAFile: cafile,
CertFile: certfile,
KeyFile: keyfile,
}
return transport.NewTransport(tls)
}