add support for json color output in repl using jq, if installed (#16)

pkg/cfg/config.go

@@ -31,7 +31,7 @@ import (
 )
 
 const (
-	Version string = `v0.0.9`
+	Version string = `v0.0.10`
 )
 
 type Cluster struct {
@@ -55,6 +55,7 @@ type Config struct {
 	All, Verbose                   bool     // cluster status: -a -v
 	Persistent, Transient, Default bool     // -p -t -D cluster settings set
 	Force                          bool     // ccr follower renew: -f
+	HaveJQ                         bool     // determined at runtime by ourselfes
 }
 
 func NewConfig() *Config {
@@ -110,6 +111,8 @@ func (conf *Config) Init() error {
 		}
 	}
 
+	conf.HaveJQ = isJQinstalled()
+
 	conf.PrintDebug()
 
 	return nil

pkg/cfg/jq.go

@@ -0,0 +1,38 @@
+/*
+Copyright © 2026 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package cfg
+
+import (
+	"context"
+	"os/exec"
+	"strings"
+)
+
+func isJQinstalled() bool {
+	cmd := exec.CommandContext(context.Background(), "jq", "-h")
+	out, err := cmd.Output()
+	if err != nil {
+		return false
+	}
+
+	if strings.Contains(string(out), "Usage") {
+		return true
+	}
+
+	return false
+}

pkg/es/repl.go

@@ -18,6 +18,7 @@ package es
 
 import (
 	"bytes"
+	"context"
 	"crypto/tls"
 	"encoding/base64"
 	"encoding/json"
@@ -25,6 +26,7 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"os/exec"
 	"slices"
 	"strings"
 
@@ -74,9 +76,30 @@ func CallAPI(conf *cfg.Config, input []string) error {
 		return fmt.Errorf("failed to read response body: %s", err)
 	}
 
+	return prettyfiJson(conf, body)
+}
+
+func prettyfiJson(conf *cfg.Config, raw []byte) error {
+	if conf.HaveJQ {
+		cmd := exec.CommandContext(context.Background(), "jq", "-C")
+		cmd.Stdin = bytes.NewReader(raw)
+
+		var out bytes.Buffer
+		cmd.Stdout = &out
+
+		err := cmd.Run()
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(out.String())
+
+		return nil
+	}
+
 	var pretty bytes.Buffer
-	error := json.Indent(&pretty, body, "", "\t")
+	err := json.Indent(&pretty, raw, "", "\t")
-	if error != nil {
+	if err != nil {
 		return fmt.Errorf("json parse error: %s", err)
 	}