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fix broken alias check is buildx is installed as alias for builder 

Commit cbec75e2f3 updated `runDocker()` to load
plugin-stubs before `processAliases()` was executed. As a result, plugin
stubs were considered as "builtin commands", causing the alias verification
to fail;

Without alias installed:

```bash
docker version
Client:
 Version:           22.06.0-beta.0-140-g3dad26ca2.m
 API version:       1.42
 Go version:        go1.19.1
 Git commit:        3dad26ca2
 Built:             Wed Sep 28 22:36:09 2022
 OS/Arch:           darwin/arm64
 Context:           default
...
```

After running `docker buildx install`;

```bash
./build/docker buildx install

cat ~/.docker/config.json
{
    "aliases": {
        "builder": "buildx"
    }
}

./build/docker version
not allowed to alias with builtin "buildx" as target
```

This patch moves loading the stubs _after_ the call to `processAliases()`, so
that verification passes. As an extra precaution, the `processAliases()` function
is also updated to exclude plugin-stub commands.

Note that cbec75e2f3 also introduced a performance
regression, which may be related to the early loading of plugins (and creating
stubs); it looks like various other code locations may also be loading plugins,
for example `tryPluginRun()` calls `pluginmanager.PluginRunCommand()`, which
also traverses plugin directories.

We should look under what circumstances the plugin stub-commands are actually
needed, and make sure that they're only created in those situations.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2022-09-29 22:35:36 +02:00
parent ef80de39ab
commit 7af8aac169
No known key found for this signature in database
GPG Key ID: 76698F39D527CE8C
2 changed files with 7 additions and 4 deletions
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5
cmd/docker/aliases.go
View File

@ -4,6 +4,7 @@ import (
"os"
"strings"
pluginmanager "github.com/docker/cli/cli-plugins/manager"
"github.com/docker/cli/cli/command"
"github.com/pkg/errors"
"github.com/spf13/cobra"
@ -26,9 +27,11 @@ func processAliases(dockerCli command.Cli, cmd *cobra.Command, args, osArgs []st
if _, ok := allowedAliases[k]; !ok {
return args, osArgs, errors.Errorf("not allowed to alias %q (allowed: %#v)", k, allowedAliases)
}
if _, _, err := cmd.Find(strings.Split(v, " ")); err == nil {
if c, _, err := cmd.Find(strings.Split(v, " ")); err == nil {
if c.Annotations[pluginmanager.CommandAnnotationPlugin] != "true" {
return args, osArgs, errors.Errorf("not allowed to alias with builtin %q as target", v)
}
}
aliases = append(aliases, [2][]string{{k}, {v}})
}

4
cmd/docker/docker.go
View File

@ -218,12 +218,12 @@ func runDocker(dockerCli *command.DockerCli) error {
return err
}
err = pluginmanager.AddPluginCommandStubs(dockerCli, cmd)
args, os.Args, err = processAliases(dockerCli, cmd, args, os.Args)
if err != nil {
return err
}
args, os.Args, err = processAliases(dockerCli, cmd, args, os.Args)
err = pluginmanager.AddPluginCommandStubs(dockerCli, cmd)
if err != nil {
return err
}