Support shortening of revision with digest

The `\b` in the regular expression ensures we only match with a
hexadecimal notation as awhole, while still allowing to match with
e.g. `sha1:...` which would not have been possible by using `\W`
as this includes `_`.

Signed-off-by: Hidde Beydals <hello@hidde.co>

cmd/flux/get_kustomization.go

@@ -18,15 +18,15 @@ package main
 
 import (
 	"fmt"
-	"regexp"
 	"strconv"
 	"strings"
 
 	"github.com/spf13/cobra"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 
 	kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1beta2"
+
+	"github.com/fluxcd/flux2/internal/utils"
 )
 
 var getKsCmd = &cobra.Command{
@@ -80,10 +80,8 @@ func (a kustomizationListAdapter) summariseItem(i int, includeNamespace bool, in
 	item := a.Items[i]
 	revision := item.Status.LastAppliedRevision
 	status, msg := statusAndMessage(item.Status.Conditions)
-	if status == string(metav1.ConditionTrue) {
-		revision = shortenCommitSha(revision)
-		msg = shortenCommitSha(msg)
-	}
+	revision = utils.TruncateHex(revision)
+	msg = utils.TruncateHex(msg)
 	return append(nameColumns(&item, includeNamespace, includeKind),
 		revision, strings.Title(strconv.FormatBool(item.Spec.Suspend)), status, msg)
 }
@@ -100,13 +98,3 @@ func (a kustomizationListAdapter) statusSelectorMatches(i int, conditionType, co
 	item := a.Items[i]
 	return statusMatches(conditionType, conditionStatus, item.Status.Conditions)
 }
-
-func shortenCommitSha(msg string) string {
-	r := regexp.MustCompile("/([a-f0-9]{40})$")
-	sha := r.FindString(msg)
-	if sha != "" {
-		msg = strings.Replace(msg, sha, string([]rune(sha)[:8]), -1)
-	}
-
-	return msg
-}