mirror of https://github.com/perkeep/perkeep.git
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
/*
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Copyright 2014 The Camlistore Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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Package dockertest contains helper functions for setting up and tearing down docker containers to aid in testing.
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*/
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package dockertest
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"os/exec"
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"strings"
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)
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func HaveImage(name string) (ok bool, err error) {
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out, err := exec.Command("docker", "images", "--no-trunc").Output()
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if err != nil {
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return
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}
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return bytes.Contains(out, []byte(name)), nil
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}
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func Run(args ...string) (containerID string, err error) {
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runOut, err := exec.Command("docker", append([]string{"run"}, args...)...).Output()
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if err != nil {
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return
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}
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containerID = strings.TrimSpace(string(runOut))
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if containerID == "" {
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return "", errors.New("unexpected empty output from `docker run`")
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}
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return
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}
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func KillContainer(container string) error {
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return exec.Command("docker", "kill", container).Run()
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}
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func Pull(name string) error {
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out, err := exec.Command("docker", "pull", name).CombinedOutput()
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if err != nil {
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err = fmt.Errorf("%v: %s", err, out)
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}
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return err
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}
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func IP(containerID string) (string, error) {
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out, err := exec.Command("docker", "inspect", containerID).Output()
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if err != nil {
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return "", err
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}
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type networkSettings struct {
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IPAddress string
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}
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type container struct {
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NetworkSettings networkSettings
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}
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var c []container
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if err := json.NewDecoder(bytes.NewReader(out)).Decode(&c); err != nil {
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return "", err
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}
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if len(c) == 0 {
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return "", errors.New("no output from docker inspect")
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}
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if ip := c[0].NetworkSettings.IPAddress; ip != "" {
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return ip, nil
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}
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return "", errors.New("no IP. Not running?")
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}
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