122 lines
3.0 KiB
Go
122 lines
3.0 KiB
Go
/*
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Copyright The containerd 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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package commands
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/containerd/containerd"
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"github.com/urfave/cli"
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)
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var (
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// SnapshotterFlags are cli flags specifying snapshotter names
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SnapshotterFlags = []cli.Flag{
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cli.StringFlag{
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Name: "snapshotter",
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Usage: "snapshotter name. Empty value stands for the default value.",
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Value: containerd.DefaultSnapshotter,
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EnvVar: "CONTAINERD_SNAPSHOTTER",
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},
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}
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// LabelFlag is a cli flag specifying labels
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LabelFlag = cli.StringSliceFlag{
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Name: "label",
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Usage: "labels to attach to the image",
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}
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// RegistryFlags are cli flags specifying registry options
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RegistryFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "skip-verify,k",
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Usage: "skip SSL certificate validation",
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},
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cli.BoolFlag{
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Name: "plain-http",
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Usage: "allow connections using plain HTTP",
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},
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cli.StringFlag{
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Name: "user,u",
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Usage: "user[:password] Registry user and password",
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},
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cli.StringFlag{
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Name: "refresh",
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Usage: "refresh token for authorization server",
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},
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}
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)
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// ObjectWithLabelArgs returns the first arg and a LabelArgs object
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func ObjectWithLabelArgs(clicontext *cli.Context) (string, map[string]string) {
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var (
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first = clicontext.Args().First()
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labelStrings = clicontext.Args().Tail()
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)
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return first, LabelArgs(labelStrings)
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}
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// LabelArgs returns a map of label key,value pairs
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func LabelArgs(labelStrings []string) map[string]string {
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labels := make(map[string]string, len(labelStrings))
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for _, label := range labelStrings {
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parts := strings.SplitN(label, "=", 2)
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key := parts[0]
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value := "true"
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if len(parts) > 1 {
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value = parts[1]
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}
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labels[key] = value
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}
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return labels
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}
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// PrintAsJSON prints input in JSON format
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func PrintAsJSON(x interface{}) {
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b, err := json.MarshalIndent(x, "", " ")
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if err != nil {
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fmt.Fprintf(os.Stderr, "can't marshal %+v as a JSON string: %v\n", x, err)
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}
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fmt.Println(string(b))
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}
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// WritePidFile writes the pid atomically to a file
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func WritePidFile(path string, pid int) error {
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path, err := filepath.Abs(path)
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if err != nil {
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return err
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}
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tempPath := filepath.Join(filepath.Dir(path), fmt.Sprintf(".%s", filepath.Base(path)))
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f, err := os.OpenFile(tempPath, os.O_RDWR|os.O_CREATE|os.O_EXCL|os.O_SYNC, 0666)
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if err != nil {
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return err
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}
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_, err = fmt.Fprintf(f, "%d", pid)
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f.Close()
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if err != nil {
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return err
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}
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return os.Rename(tempPath, path)
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}
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