/* Copyright 2020 Docker Compose CLI authors Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package bridge import ( "context" "fmt" "os" "path/filepath" "github.com/docker/cli/cli/command" "github.com/docker/docker/api/types/container" "github.com/docker/docker/api/types/filters" "github.com/docker/docker/api/types/image" "github.com/docker/docker/api/types/network" "github.com/moby/go-archive" ) const ( TransformerLabel = "com.docker.compose.bridge" DefaultTransformerImage = "docker/compose-bridge-kubernetes" ) type CreateTransformerOptions struct { Dest string From string } func CreateTransformer(ctx context.Context, dockerCli command.Cli, options CreateTransformerOptions) error { if options.From == "" { options.From = DefaultTransformerImage } out, err := filepath.Abs(options.Dest) if err != nil { return err } if _, err := os.Stat(out); err == nil { return fmt.Errorf("output folder %s already exists", out) } tmpl := filepath.Join(out, "templates") err = os.MkdirAll(tmpl, 0o744) if err != nil && !os.IsExist(err) { return fmt.Errorf("cannot create output folder: %w", err) } if err := command.ValidateOutputPath(out); err != nil { return err } created, err := dockerCli.Client().ContainerCreate(ctx, &container.Config{ Image: options.From, }, &container.HostConfig{}, &network.NetworkingConfig{}, nil, "") defer func() { _ = dockerCli.Client().ContainerRemove(context.Background(), created.ID, container.RemoveOptions{Force: true}) }() if err != nil { return err } content, stat, err := dockerCli.Client().CopyFromContainer(ctx, created.ID, "/templates") if err != nil { return err } defer func() { _ = content.Close() }() srcInfo := archive.CopyInfo{ Path: "/templates", Exists: true, IsDir: stat.Mode.IsDir(), } preArchive := content if srcInfo.RebaseName != "" { _, srcBase := archive.SplitPathDirEntry(srcInfo.Path) preArchive = archive.RebaseArchiveEntries(content, srcBase, srcInfo.RebaseName) } if err := archive.CopyTo(preArchive, srcInfo, out); err != nil { return err } dockerfile := `FROM docker/compose-bridge-transformer LABEL com.docker.compose.bridge=transformation COPY templates /templates ` if err := os.WriteFile(filepath.Join(out, "Dockerfile"), []byte(dockerfile), 0o700); err != nil { return err } _, err = fmt.Fprintf(dockerCli.Out(), "Transformer created in %q\n", out) return err } func ListTransformers(ctx context.Context, dockerCli command.Cli) ([]image.Summary, error) { api := dockerCli.Client() return api.ImageList(ctx, image.ListOptions{ Filters: filters.NewArgs( filters.Arg("label", fmt.Sprintf("%s=%s", TransformerLabel, "transformation")), ), }) }