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https://github.com/mudler/luet.git
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675170939d
Create a util sub cmd to add all utils that are handy for development and already present in the luet codebase. We expose in this case `luet util unpack` to unpack a docker image without a docker daemon running.
73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
// Copyright © 2021 Ettore Di Giacinto <mudler@mocaccino.org>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, see <http://www.gnu.org/licenses/>.
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package util
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/docker/go-units"
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"github.com/mudler/luet/pkg/config"
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"github.com/mudler/luet/pkg/helpers"
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. "github.com/mudler/luet/pkg/logger"
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"github.com/spf13/cobra"
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)
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func NewUnpackCommand() *cobra.Command {
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return &cobra.Command{
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Use: "unpack image path",
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Short: "Unpack a docker image natively",
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Long: `unpack doesn't need the docker daemon to run, and unpacks a docker image in the specified directory:
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luet util unpack golang:alpine /alpine
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`,
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PreRun: func(cmd *cobra.Command, args []string) {
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if len(args) != 2 {
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Fatal("Expects an image and a path")
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}
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},
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Run: func(cmd *cobra.Command, args []string) {
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image := args[0]
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destination, err := filepath.Abs(args[1])
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if err != nil {
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Error("Invalid path %s", destination)
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os.Exit(1)
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}
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temp, err := config.LuetCfg.GetSystem().TempDir("contentstore")
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if err != nil {
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Fatal("Cannot create a tempdir", err.Error())
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}
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Info("Downloading", image, "to", destination)
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info, err := helpers.DownloadAndExtractDockerImage(temp, image, destination)
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if err != nil {
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Error(err.Error())
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os.Exit(1)
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}
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Info(fmt.Sprintf("Pulled: %s", info.Target.Digest))
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Info(fmt.Sprintf("Size: %s", units.BytesSize(float64(info.ContentSize))))
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},
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}
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}
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