mirror of https://github.com/docker/compose.git
93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
/*
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Copyright 2020 Docker, Inc.
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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 mobycli
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import (
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"context"
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"fmt"
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"os"
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"os/exec"
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"strings"
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"github.com/spf13/cobra"
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apicontext "github.com/docker/api/context"
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"github.com/docker/api/context/store"
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)
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// ComDockerCli name of the classic cli binary
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const ComDockerCli = "com.docker.cli"
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// ExecIfDefaultCtxType delegates to com.docker.cli if on moby or AWS context (until there is an AWS backend)
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func ExecIfDefaultCtxType(ctx context.Context) {
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currentContext := apicontext.CurrentContext(ctx)
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s := store.ContextStore(ctx)
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currentCtx, err := s.Get(currentContext)
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// Only run original docker command if the current context is not ours.
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if err != nil || mustDelegateToMoby(currentCtx.Type()) {
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Exec(ctx)
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}
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}
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func mustDelegateToMoby(ctxType string) bool {
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return ctxType == store.DefaultContextType || ctxType == store.AwsContextType
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}
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// Exec delegates to com.docker.cli if on moby context
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func Exec(ctx context.Context) {
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cmd := exec.CommandContext(ctx, ComDockerCli, os.Args[1:]...)
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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if exiterr, ok := err.(*exec.ExitError); ok {
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os.Exit(exiterr.ExitCode())
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}
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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os.Exit(0)
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}
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// ExecCmd delegates the cli command to com.docker.cli. The error is never
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// returned (process will exit with docker classic exit code), the return type
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// is to make it easier to use with cobra commands
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func ExecCmd(command *cobra.Command) error {
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Exec(command.Context())
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return nil
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}
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// IsDefaultContextCommand checks if the command exists in the classic cli (issues a shellout --help)
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func IsDefaultContextCommand(dockerCommand string) bool {
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cmd := exec.Command(ComDockerCli, dockerCommand, "--help")
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b, e := cmd.CombinedOutput()
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if e != nil {
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fmt.Println(e)
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}
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output := string(b)
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contains := strings.Contains(output, "Usage:\tdocker "+dockerCommand)
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return contains
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}
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// ExecSilent executes a command and do redirect output to stdOut, return output
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func ExecSilent(ctx context.Context) ([]byte, error) {
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cmd := exec.CommandContext(ctx, ComDockerCli, os.Args[1:]...)
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return cmd.CombinedOutput()
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}
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