feat: overhaul gnoland secrets and gnoland config to output JSON (g…

…nolang#2393)

## Description

This PR overhauls the `gnoland secrets get` and `gnoland config get`
commands to:
- always output JSON by default
- support key paths for specific fields
- have `-raw` support for single value JSON (escapes `"`)

Thank you @moul for the suggestion on this 🙏 


![sample](https://github.com/gnolang/gno/assets/16712663/30c87b02-1c77-4134-a3b0-88b95687e292)

cc @albttx @sw360cab @r3v4s @mazzy89 

<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [ ] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [x] Added references to related issues and PRs
- [x] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

docs/gno-infrastructure/setting-up-a-local-chain.md

@@ -10,10 +10,12 @@ In this tutorial, you will learn how to start a local Gno node (and chain!).
 Additionally, you will see the different options you can use to make your Gno instance unique.
 
 ## Prerequisites
+
 - **Git**
 - **`make` (for running Makefiles)**
 - **Go 1.21+**
-- **Go Environment Setup**: Ensure you have Go set up as outlined in the [Go official installation documentation](https://go.dev/doc/install) for your environment
+- **Go Environment Setup**: Ensure you have Go set up as outlined in
+  the [Go official installation documentation](https://go.dev/doc/install) for your environment
 
 ## Installation
 
@@ -153,7 +155,7 @@ A couple of things to note:
 - `gnoland config init` initializes a default configuration
 - `gnoland secrets init` initializes new node secrets (validator key, node p2p key)
 
-Essentially, `gnoland start --lazy` is simply a combination of `gnoland secrets generate` and `gnoland config generate`,
+Essentially, `gnoland start --lazy` is simply a combination of `gnoland secrets init` and `gnoland config init`,
 with the default options enabled.
 
 #### Changing the node configuration
@@ -244,7 +246,7 @@ locally will be the validator node for the new Gno network.
 To display the generated node key data, run the following command:
 
 ```shell
-gnoland secrets get ValidatorPrivateKey
+gnoland secrets get validator_key
 ```
 
 This will display the information we need for updating the `genesis.json`:

gno.land/cmd/gnoland/config.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"flag"
 	"fmt"
 	"path/filepath"
@@ -58,6 +59,62 @@ func constructConfigPath(nodeDir string) string {
 	)
 }
 
+// printKeyValue searches and prints the given key value in JSON
+func printKeyValue[T *secrets | *config.Config](
+	input T,
+	raw bool,
+	io commands.IO,
+	key ...string,
+) error {
+	// prepareOutput prepares the JSON output, taking into account raw mode
+	prepareOutput := func(input any) (string, error) {
+		encoded, err := json.MarshalIndent(input, "", "    ")
+		if err != nil {
+			return "", fmt.Errorf("unable to marshal JSON, %w", err)
+		}
+
+		output := string(encoded)
+
+		if raw {
+			if err := json.Unmarshal(encoded, &output); err != nil {
+				return "", fmt.Errorf("unable to unmarshal raw JSON, %w", err)
+			}
+		}
+
+		return output, nil
+	}
+
+	if len(key) == 0 {
+		// Print the entire input
+		output, err := prepareOutput(input)
+		if err != nil {
+			return err
+		}
+
+		io.Println(output)
+
+		return nil
+	}
+
+	// Get the value using reflect
+	secretValue := reflect.ValueOf(input).Elem()
+
+	// Get the value path, with sections separated out by a period
+	field, err := getFieldAtPath(secretValue, strings.Split(key[0], "."))
+	if err != nil {
+		return err
+	}
+
+	output, err := prepareOutput(field.Interface())
+	if err != nil {
+		return err
+	}
+
+	io.Println(output)
+
+	return nil
+}
+
 // getFieldAtPath fetches the given field from the given path
 func getFieldAtPath(currentValue reflect.Value, path []string) (*reflect.Value, error) {
 	// Look at the current section, and figure out if

gno.land/cmd/gnoland/config_get.go

@@ -3,24 +3,29 @@ package main
 import (
 	"context"
 	"errors"
+	"flag"
 	"fmt"
-	"reflect"
-	"strings"
 
 	"github.com/gnolang/gno/tm2/pkg/bft/config"
 	"github.com/gnolang/gno/tm2/pkg/commands"
 )
 
 var errInvalidConfigGetArgs = errors.New("invalid number of config get arguments provided")
 
+type configGetCfg struct {
+	configCfg
+
+	raw bool
+}
+
 // newConfigGetCmd creates the config get command
 func newConfigGetCmd(io commands.IO) *commands.Command {
-	cfg := &configCfg{}
+	cfg := &configGetCfg{}
 
 	cmd := commands.NewCommand(
 		commands.Metadata{
 			Name:       "get",
-			ShortUsage: "config get <key>",
+			ShortUsage: "config get [flags] [<key>]",
 			ShortHelp:  "shows the Gno node configuration",
 			LongHelp: "Shows the Gno node configuration at the given path " +
 				"by fetching the option specified at <key>",
@@ -34,40 +39,33 @@ func newConfigGetCmd(io commands.IO) *commands.Command {
 	return cmd
 }
 
-func execConfigGet(cfg *configCfg, io commands.IO, args []string) error {
+func (c *configGetCfg) RegisterFlags(fs *flag.FlagSet) {
+	c.configCfg.RegisterFlags(fs)
+
+	fs.BoolVar(
+		&c.raw,
+		"raw",
+		false,
+		"output raw string values, rather than as JSON strings",
+	)
+}
+
+func execConfigGet(cfg *configGetCfg, io commands.IO, args []string) error {
 	// Load the config
 	loadedCfg, err := config.LoadConfigFile(cfg.configPath)
 	if err != nil {
 		return fmt.Errorf("%s, %w", tryConfigInit, err)
 	}
 
-	// Make sure the edit arguments are valid
-	if len(args) != 1 {
+	// Make sure the get arguments are valid
+	if len(args) > 1 {
 		return errInvalidConfigGetArgs
 	}
 
 	// Find and print the config field, if any
-	if err := printConfigField(loadedCfg, args[0], io); err != nil {
-		return fmt.Errorf("unable to update config field, %w", err)
-	}
-
-	return nil
-}
-
-// printConfigField prints the value of the field at the given path
-func printConfigField(config *config.Config, key string, io commands.IO) error {
-	// Get the config value using reflect
-	configValue := reflect.ValueOf(config).Elem()
-
-	// Get the value path, with sections separated out by a period
-	path := strings.Split(key, ".")
-
-	field, err := getFieldAtPath(configValue, path)
-	if err != nil {
-		return err
+	if err := printKeyValue(loadedCfg, cfg.raw, io, args...); err != nil {
+		return fmt.Errorf("unable to get config field, %w", err)
 	}
 
-	io.Printf("%v", field.Interface())
-
 	return nil
 }