Refactoring & renaming

actions/check.go

@@ -0,0 +1,29 @@
+package actions
+
+import (
+	"sort"
+
+	"github.com/CenturyLinkLabs/watchtower/container"
+)
+
+func watchtowerContainersFilter(c container.Container) bool { return c.IsWatchtower() }
+
+func CheckPrereqs() error {
+	client := container.NewClient()
+
+	containers, err := client.ListContainers(watchtowerContainersFilter)
+	if err != nil {
+		return err
+	}
+
+	if len(containers) > 1 {
+		sort.Sort(container.ByCreated(containers))
+
+		// Iterate over all containers execept the last one
+		for _, c := range containers[0 : len(containers)-1] {
+			client.Stop(c, 60)
+		}
+	}
+
+	return nil
+}