Add machine output for recipe/upgrade

- Normal faff related to calling external libraries with structs thnx go
- Ouputs json now

cli/recipe/upgrade.go

@@ -2,6 +2,7 @@ package recipe
 
 import (
 	"bufio"
+	"encoding/json"
 	"fmt"
 	"os"
 	"path"
@@ -27,11 +28,11 @@ type imgPin struct {
 	version tagcmp.Tag
 }
 
-type upgradeList struct {
-	service     string
-	image       string
-	tag         string
-	upgradeTags []string
+type anUpgrade struct {
+	Service     string   `json:"service"`
+	Image       string   `json:"image"`
+	Tag         string   `json:"tag"`
+	UpgradeTags []string `json:"upgrades"`
 }
 
 var recipeUpgradeCommand = cli.Command{
@@ -63,6 +64,7 @@ You may invoke this command in "wizard" mode and be prompted for input:
 		internal.PatchFlag,
 		internal.MinorFlag,
 		internal.MajorFlag,
+		internal.MachineReadableFlag,
 		internal.AllTagsFlag,
 	},
 	Before: internal.SubCommandBefore,
@@ -82,7 +84,7 @@ You may invoke this command in "wizard" mode and be prompted for input:
 			}
 		}
 
-		var upgrades []upgradeList
+		upgradeList := make(map[string]anUpgrade)
 
 		// check for versions file and load pinned versions
 		versionsPresent := false
@@ -250,21 +252,21 @@ You may invoke this command in "wizard" mode and be prompted for input:
 						}
 					}
 
-					upgrade := upgradeList{
-						service:     service.Name,
-						image:       image,
-						tag:         tag.String(),
-						upgradeTags: make([]string, len(compatibleStrings[1:])),
+					upgrade := anUpgrade{
+						Service:     service.Name,
+						Image:       image,
+						Tag:         tag.String(),
+						UpgradeTags: make([]string, len(compatibleStrings[1:])),
 					}
 
 					for n, s := range compatibleStrings[1:] {
 						var sb strings.Builder
 						if _, err := sb.WriteString(s); err != nil {
 						}
-						upgrade.upgradeTags[n] = sb.String()
+						upgrade.UpgradeTags[n] = sb.String()
 					}
 
-					upgrades = append(upgrades, upgrade)
+					upgradeList[upgrade.Service] = upgrade
 
 					if internal.NoInput {
 						upgradeTag = "skip"
@@ -297,11 +299,20 @@ You may invoke this command in "wizard" mode and be prompted for input:
 		}
 
 		if internal.NoInput {
-			// FIXME handle machine-readable here
-			for _, upgrade := range upgrades {
-				logrus.Infof("can upgrade service: %s, image: %s, tag: %s ::\n", upgrade.service, upgrade.image, upgrade.tag)
-				for _, utag := range upgrade.upgradeTags {
-					logrus.Infof("    %s\n", utag)
+			if internal.MachineReadable {
+				jsonstring, err := json.Marshal(upgradeList)
+				if err != nil {
+					logrus.Fatal(err)
+				} else {
+					fmt.Println(string(jsonstring))
+				}
+
+			} else {
+				for _, upgrade := range upgradeList {
+					logrus.Infof("can upgrade service: %s, image: %s, tag: %s ::\n", upgrade.Service, upgrade.Image, upgrade.Tag)
+					for _, utag := range upgrade.UpgradeTags {
+						logrus.Infof("    %s\n", utag)
+					}
 				}
 			}
 		}