Add test for files vanishing between scan and backup

Makefile

@@ -21,7 +21,7 @@ test: release debug
 	go test -v ./...
 	test/run.sh cmd/restic:cmd/dirdiff
 
-test-%: test/test-%.sh
+test-%: test/test-%.sh release debug
 	echo $*
 	test/run.sh cmd/restic:cmd/dirdiff "test/$@.sh"
 

test/test-backup-missing-file.sh

@@ -0,0 +1,25 @@
+set -em
+
+# setup restic
+prepare
+run restic init
+
+# start backup, break before saving files
+DEBUG_BREAK=Archiver.Snapshot run restic.debug backup "${BASE}/fake-data" && debug "done"
+
+# remove file
+rm -f "${BASE}/fake-data/0/0/9/37"
+
+# resume backup
+fg
+
+# run restic restore "$(basename "$RESTIC_REPOSITORY"/snapshots/*)" "${BASE}/fake-data-restore"
+# dirdiff "${BASE}/fake-data" "${BASE}/fake-data-restore/fake-data"
+
+# SNAPSHOT=$(run restic list snapshots)
+# run restic backup "${BASE}/fake-data" $SNAPSHOT
+# run restic restore "$(basename "$RESTIC_REPOSITORY"/snapshots/*)" "${BASE}/fake-data-restore-incremental"
+# dirdiff "${BASE}/fake-data" "${BASE}/fake-data-restore-incremental/fake-data"
+
+# run restic fsck -o --check-data
+cleanup