simple check option

check/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"encoding/json"
+	"os"
+
+	resource "github.com/cioplenu/concourse-nomad-resource"
+	"github.com/cioplenu/concourse-nomad-resource/common"
+)
+
+type Request struct {
+	Source  resource.Source  `json:"source"`
+	Version resource.Version `json:"version,omitempty"`
+}
+
+func main() {
+	var request Request
+	err := json.NewDecoder(os.Stdin).Decode(&request)
+	common.Check(err, "Error parsing request")
+
+	lastVersion := request.Version.Version
+
+	history := common.GetHistory(request.Source)
+	versions := make([]resource.Version, 0)
+
+	for _, jobVersion := range history {
+		if lastVersion != 0 && lastVersion > jobVersion.Version {
+			continue
+		}
+		versions = append(versions, resource.Version{jobVersion.Version})
+		if lastVersion == 0 {
+			break
+		}
+	}
+
+	json.NewEncoder(os.Stdout).Encode(versions)
+
+}