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a1c669d3ae
It holds necessary state plus additional information relative to the context which we are being run to (e.g. if we are in a terminal or not). Besides in the future we can use it also as a contextual logger to provide more smart logging capabilities. This also replace the general global configuration instance that previously was share between the core components.
87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
// Copyright © 2020 Ettore Di Giacinto <mudler@gentoo.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 cmd
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import (
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"fmt"
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"os"
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b64 "encoding/base64"
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"github.com/mudler/luet/cmd/util"
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"github.com/mudler/luet/pkg/box"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var execCmd = &cobra.Command{
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Use: "exec --rootfs /path [command]",
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Short: "Execute a command in the rootfs context",
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Long: `Uses unshare technique and pivot root to execute a command inside a folder containing a valid rootfs`,
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PreRun: func(cmd *cobra.Command, args []string) {
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},
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// If you change this, look at pkg/box/exec that runs this command and adapt
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Run: func(cmd *cobra.Command, args []string) {
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stdin, _ := cmd.Flags().GetBool("stdin")
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stdout, _ := cmd.Flags().GetBool("stdout")
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stderr, _ := cmd.Flags().GetBool("stderr")
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rootfs, _ := cmd.Flags().GetString("rootfs")
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base, _ := cmd.Flags().GetBool("decode")
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entrypoint, _ := cmd.Flags().GetString("entrypoint")
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envs, _ := cmd.Flags().GetStringArray("env")
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mounts, _ := cmd.Flags().GetStringArray("mount")
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if base {
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var ss []string
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for _, a := range args {
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sDec, _ := b64.StdEncoding.DecodeString(a)
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ss = append(ss, string(sDec))
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}
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//If the command to run is complex,using base64 to avoid bad input
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args = ss
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}
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util.DefaultContext.Info("Executing", args, "in", rootfs)
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b := box.NewBox(entrypoint, args, mounts, envs, rootfs, stdin, stdout, stderr)
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err := b.Exec()
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if err != nil {
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util.DefaultContext.Fatal(errors.Wrap(err, fmt.Sprintf("entrypoint: %s rootfs: %s", entrypoint, rootfs)))
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}
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},
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}
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func init() {
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path, err := os.Getwd()
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if err != nil {
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util.DefaultContext.Fatal(err)
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}
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execCmd.Hidden = true
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execCmd.Flags().String("rootfs", path, "Rootfs path")
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execCmd.Flags().Bool("stdin", false, "Attach to stdin")
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execCmd.Flags().Bool("stdout", false, "Attach to stdout")
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execCmd.Flags().Bool("stderr", false, "Attach to stderr")
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execCmd.Flags().Bool("decode", false, "Base64 decode")
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execCmd.Flags().StringArrayP("env", "e", []string{}, "Environment settings")
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execCmd.Flags().StringArrayP("mount", "m", []string{}, "List of paths to bind-mount from the host")
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execCmd.Flags().String("entrypoint", "/bin/sh", "Entrypoint command (/bin/sh)")
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RootCmd.AddCommand(execCmd)
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}
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