83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
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/*
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Copyright 2023 Docker Compose CLI authors
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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 compose
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import (
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"context"
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"fmt"
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"os"
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"github.com/docker/compose/v2/pkg/api"
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"github.com/spf13/cobra"
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)
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type generateOptions struct {
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*ProjectOptions
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Format string
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}
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func generateCommand(p *ProjectOptions, backend api.Service) *cobra.Command {
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opts := generateOptions{
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ProjectOptions: p,
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}
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cmd := &cobra.Command{
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Use: "generate [OPTIONS] [CONTAINERS...]",
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Short: "EXPERIMENTAL - Generate a Compose file from existing containers",
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PreRunE: Adapt(func(ctx context.Context, args []string) error {
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return nil
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}),
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RunE: Adapt(func(ctx context.Context, args []string) error {
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return runGenerate(ctx, backend, opts, args)
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}),
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}
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cmd.Flags().StringVar(&opts.ProjectName, "name", "", "Project name to set in the Compose file")
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cmd.Flags().StringVar(&opts.ProjectDir, "project-dir", "", "Directory to use for the project")
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cmd.Flags().StringVar(&opts.Format, "format", "yaml", "Format the output. Values: [yaml | json]")
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return cmd
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}
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func runGenerate(ctx context.Context, backend api.Service, opts generateOptions, containers []string) error {
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_, _ = fmt.Fprintln(os.Stderr, "generate command is EXPERIMENTAL")
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if len(containers) == 0 {
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return fmt.Errorf("at least one container must be specified")
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}
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project, err := backend.Generate(ctx, api.GenerateOptions{
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Containers: containers,
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ProjectName: opts.ProjectName,
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})
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if err != nil {
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return err
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}
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var content []byte
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switch opts.Format {
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case "json":
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content, err = project.MarshalJSON()
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case "yaml":
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content, err = project.MarshalYAML()
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default:
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return fmt.Errorf("unsupported format %q", opts.Format)
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}
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if err != nil {
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return err
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}
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fmt.Println(string(content))
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return nil
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}
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