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

internal/cli/resolve.go

@@ -0,0 +1,65 @@
+package cli
+
+import (
+	"encoding/json"
+	"fmt"
+	"text/tabwriter"
+
+	"github.com/spf13/cobra"
+)
+
+func newResolveCmd(opts *options) *cobra.Command {
+	var asJSON bool
+	cmd := &cobra.Command{
+		Use:   "resolve",
+		Short: "List the extensions the config resolves to, in merge order",
+		Long: `Resolve fetches each extension in the config and its dependencies, and prints
+them in the order their patches are applied. Dependencies come first. Nothing
+is generated.`,
+		Args: cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			cfg, g, err := opts.setup(cmd)
+			if err != nil {
+				return err
+			}
+			exts, err := g.Resolve(cfg.Extensions)
+			if err != nil {
+				return err
+			}
+
+			if asJSON {
+				type row struct {
+					Name         string   `json:"name"`
+					URL          string   `json:"url"`
+					Declared     bool     `json:"declared"`
+					Dependencies []string `json:"dependencies,omitempty"`
+				}
+				rows := make([]row, len(exts))
+				for i, e := range exts {
+					rows[i] = row{e.Name, e.URL, e.Declared, e.Dependencies}
+				}
+				enc := json.NewEncoder(cmd.OutOrStdout())
+				enc.SetIndent("", "  ")
+				if err := enc.Encode(rows); err != nil {
+					return err
+				}
+			} else {
+				w := tabwriter.NewWriter(cmd.OutOrStdout(), 0, 0, 2, ' ', 0)
+				fmt.Fprintln(w, "#\tNAME\tSOURCE\tURL")
+				for i, e := range exts {
+					src := "dependency"
+					if e.Declared {
+						src = "declared"
+					}
+					fmt.Fprintf(w, "%d\t%s\t%s\t%s\n", i+1, e.Name, src, e.URL)
+				}
+				if err := w.Flush(); err != nil {
+					return err
+				}
+			}
+			return opts.finish(g)
+		},
+	}
+	cmd.Flags().BoolVar(&asJSON, "json", false, "print as JSON")
+	return cmd
+}