Complete package for generating ocds structs (with extensions) in golang

internal/cli/schema.go

@@ -0,0 +1,66 @@
+package cli
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+func newSchemaCmd(opts *options) *cobra.Command {
+	var (
+		kind string
+		out  string
+	)
+	cmd := &cobra.Command{
+		Use:   "schema",
+		Short: "Write the merged JSON Schema (core plus extensions)",
+		Long: `Schema writes the release or release package schema with every extension
+in the config applied. This is the schema the Go types are generated from,
+which is useful for debugging a config or validating data with other tools.`,
+		Example: `  ocdsgen schema > release-schema.json
+  ocdsgen schema --kind package -o release-package-schema.json`,
+		Args: cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			if kind != "release" && kind != "package" {
+				return fmt.Errorf(`--kind must be "release" or "package", got %q`, kind)
+			}
+			cfg, g, err := opts.setup(cmd)
+			if err != nil {
+				return err
+			}
+			exts, err := g.Resolve(cfg.Extensions)
+			if err != nil {
+				return err
+			}
+			s, err := g.Merge(cfg, exts)
+			if err != nil {
+				return err
+			}
+			doc := s.Release
+			if kind == "package" {
+				doc = s.Package
+			}
+			b, err := json.MarshalIndent(doc, "", "  ")
+			if err != nil {
+				return err
+			}
+			b = append(b, '\n')
+
+			if out == "-" {
+				_, err = cmd.OutOrStdout().Write(b)
+			} else {
+				err = os.WriteFile(out, b, 0o644)
+			}
+			if err != nil {
+				return err
+			}
+			return opts.finish(g)
+		},
+	}
+	f := cmd.Flags()
+	f.StringVar(&kind, "kind", "release", `which schema to write: "release" or "package"`)
+	f.StringVarP(&out, "out", "o", "-", `output file, or "-" for stdout`)
+	return cmd
+}