diff --git a/cmd/compose/config.go b/cmd/compose/config.go index 23625b146b..4851e773cb 100644 --- a/cmd/compose/config.go +++ b/cmd/compose/config.go @@ -21,13 +21,16 @@ import ( "context" "encoding/json" "fmt" + "io" "os" "sort" "strings" "github.com/compose-spec/compose-go/v2/cli" + "github.com/compose-spec/compose-go/v2/template" "github.com/compose-spec/compose-go/v2/types" "github.com/docker/cli/cli/command" + "github.com/docker/compose/v2/cmd/formatter" "github.com/spf13/cobra" "gopkg.in/yaml.v3" @@ -50,6 +53,7 @@ type configOptions struct { images bool hash string noConsistency bool + variables bool } func (o *configOptions) ToProject(ctx context.Context, dockerCli command.Cli, services []string, po ...cli.ProjectOptionsFn) (*types.Project, error) { @@ -111,6 +115,9 @@ func configCommand(p *ProjectOptions, dockerCli command.Cli) *cobra.Command { if opts.images { return runConfigImages(ctx, dockerCli, opts, args) } + if opts.variables { + return runVariables(ctx, dockerCli, opts, args) + } return runConfig(ctx, dockerCli, opts, args) }), @@ -125,11 +132,12 @@ func configCommand(p *ProjectOptions, dockerCli command.Cli) *cobra.Command { flags.BoolVar(&opts.noResolvePath, "no-path-resolution", false, "Don't resolve file paths") flags.BoolVar(&opts.noConsistency, "no-consistency", false, "Don't check model consistency - warning: may produce invalid Compose output") - flags.BoolVar(&opts.services, "services", false, "Print the service names, one per line") - flags.BoolVar(&opts.volumes, "volumes", false, "Print the volume names, one per line") - flags.BoolVar(&opts.profiles, "profiles", false, "Print the profile names, one per line") - flags.BoolVar(&opts.images, "images", false, "Print the image names, one per line") - flags.StringVar(&opts.hash, "hash", "", "Print the service config hash, one per line") + flags.BoolVar(&opts.services, "services", false, "Print the service names, one per line.") + flags.BoolVar(&opts.volumes, "volumes", false, "Print the volume names, one per line.") + flags.BoolVar(&opts.profiles, "profiles", false, "Print the profile names, one per line.") + flags.BoolVar(&opts.images, "images", false, "Print the image names, one per line.") + flags.StringVar(&opts.hash, "hash", "", "Print the service config hash, one per line.") + flags.BoolVar(&opts.variables, "variables", false, "Print model variables and default values.") flags.StringVarP(&opts.Output, "output", "o", "", "Save to file (default to stdout)") return cmd @@ -333,6 +341,22 @@ func runConfigImages(ctx context.Context, dockerCli command.Cli, opts configOpti return nil } +func runVariables(ctx context.Context, dockerCli command.Cli, opts configOptions, services []string) error { + opts.noInterpolate = true + model, err := opts.ToModel(ctx, dockerCli, services, cli.WithoutEnvironmentResolution) + if err != nil { + return err + } + + variables := template.ExtractVariables(model, template.DefaultPattern) + + return formatter.Print(variables, "", dockerCli.Out(), func(w io.Writer) { + for name, variable := range variables { + _, _ = fmt.Fprintf(w, "%s\t%t\t%s\t%s\n", name, variable.Required, variable.DefaultValue, variable.PresenceValue) + } + }, "NAME", "REQUIRED", "DEFAULT VALUE", "ALTERNATE VALUE") +} + func escapeDollarSign(marshal []byte) []byte { dollar := []byte{'$'} escDollar := []byte{'$', '$'} diff --git a/docs/reference/compose_config.md b/docs/reference/compose_config.md index fd213b4c38..e38eb5c654 100644 --- a/docs/reference/compose_config.md +++ b/docs/reference/compose_config.md @@ -13,18 +13,19 @@ Parse, resolve and render compose file in canonical format |:--------------------------|:---------|:--------|:----------------------------------------------------------------------------| | `--dry-run` | | | Execute command in dry run mode | | `--format` | `string` | `yaml` | Format the output. Values: [yaml \| json] | -| `--hash` | `string` | | Print the service config hash, one per line | -| `--images` | | | Print the image names, one per line | +| `--hash` | `string` | | Print the service config hash, one per line. | +| `--images` | | | Print the image names, one per line. | | `--no-consistency` | | | Don't check model consistency - warning: may produce invalid Compose output | | `--no-interpolate` | | | Don't interpolate environment variables | | `--no-normalize` | | | Don't normalize compose model | | `--no-path-resolution` | | | Don't resolve file paths | | `-o`, `--output` | `string` | | Save to file (default to stdout) | -| `--profiles` | | | Print the profile names, one per line | +| `--profiles` | | | Print the profile names, one per line. | | `-q`, `--quiet` | | | Only validate the configuration, don't print anything | | `--resolve-image-digests` | | | Pin image tags to digests | -| `--services` | | | Print the service names, one per line | -| `--volumes` | | | Print the volume names, one per line | +| `--services` | | | Print the service names, one per line. | +| `--variables` | | | Print model variables and default values. | +| `--volumes` | | | Print the volume names, one per line. | diff --git a/docs/reference/docker_compose_config.yaml b/docs/reference/docker_compose_config.yaml index ea7669b0d9..68a7b8994e 100644 --- a/docs/reference/docker_compose_config.yaml +++ b/docs/reference/docker_compose_config.yaml @@ -21,7 +21,7 @@ options: swarm: false - option: hash value_type: string - description: Print the service config hash, one per line + description: Print the service config hash, one per line. deprecated: false hidden: false experimental: false @@ -31,7 +31,7 @@ options: - option: images value_type: bool default_value: "false" - description: Print the image names, one per line + description: Print the image names, one per line. deprecated: false hidden: false experimental: false @@ -92,7 +92,7 @@ options: - option: profiles value_type: bool default_value: "false" - description: Print the profile names, one per line + description: Print the profile names, one per line. deprecated: false hidden: false experimental: false @@ -123,7 +123,17 @@ options: - option: services value_type: bool default_value: "false" - description: Print the service names, one per line + description: Print the service names, one per line. + deprecated: false + hidden: false + experimental: false + experimentalcli: false + kubernetes: false + swarm: false + - option: variables + value_type: bool + default_value: "false" + description: Print model variables and default values. deprecated: false hidden: false experimental: false @@ -133,7 +143,7 @@ options: - option: volumes value_type: bool default_value: "false" - description: Print the volume names, one per line + description: Print the volume names, one per line. deprecated: false hidden: false experimental: false