skip backup when next run is in the past

README.md

@@ -70,6 +70,7 @@ the [docs directory](docs).
   * `v1.6.4` routine update of deps
   * `v1.6.5` routine update of Dockerfile
   * `v1.7.0` correct cron execution even when host was suspended between runs
+  * `v1.7.1` skip backup when next run is in the past
 
 [restic]:    https://github.com/restic/restic
 [sidecar]:   test/deploy/demo/base/_common/deployment.yaml#L26-L48

cmd/mcs-backup/initialize.go

@@ -252,7 +252,11 @@ func initializeService(dryrun bool) {
 
 				select {
 
-				case <-sleepUntil(nextOccurrency.Start):
+				case t := <-sleepUntil(nextOccurrency.Start):
+					if t.IsZero() {
+						loki.Infof("skip backup")
+						continue
+					}
 					loki.Infof("backup triggered via cron")
 					if err := fullBackupRun(); err != nil {
 						loki.Errorf("cron: %v", err)
@@ -283,6 +287,10 @@ func sleepUntil(t time.Time) <-chan time.Time {
 	step := time.Duration(time.Minute)
 	go func(t time.Time) {
 		for {
+			if t.Before(time.Now()) {
+				tCh <- time.Time{}
+				return
+			}
 			delta := time.Until(t)
 			if delta > step {
 				time.Sleep(step)

docker/Dockerfile

@@ -1,5 +1,5 @@
 #       https://hub.docker.com/_/golang
-FROM    golang:1.21.5 AS builder
+FROM    golang:1.21.6 AS builder
 WORKDIR /go/src/app
 ARG     VERSION
 COPY    . ./
@@ -9,7 +9,7 @@ RUN     CGO_ENABLED=0 go build -trimpath -tags timetzdata -ldflags="-s -w -X 'ma
 FROM    library/alpine:20231219
 
 #       https://github.com/restic/restic/releases
-ARG     RESTIC_VERSION=0.16.2
+ARG     RESTIC_VERSION=0.16.3
 #       https://github.com/mikefarah/yq/releases/
 ARG     YQ_VERSION=4.40.5
 RUN     set -x \