feat: implement resource:report

plugins/resource/resource.go

@@ -1,5 +1,15 @@
 package resource
 
+import (
+	"fmt"
+	"os"
+	"reflect"
+	"sort"
+	"strings"
+
+	"github.com/dokku/dokku/plugins/common"
+)
+
 // Resource is a collection of resource constraints for apps
 type Resource struct {
 	CPU            string `json:"cpu"`
@@ -9,3 +19,61 @@ type Resource struct {
 	NetworkIngress string `json:"network-ingress"`
 	NetworkEgress  string `json:"network-egress"`
 }
+
+// ReportSingleApp is an internal function that displays the app report for one or more apps
+func ReportSingleApp(appName, infoFlag string) {
+	if err := common.VerifyAppName(appName); err != nil {
+		common.LogFail(err.Error())
+	}
+
+	resources, err := common.PropertyGetAll("resource", appName)
+	if err != nil {
+		common.LogFail(err.Error())
+	}
+
+	flags := []string{}
+	infoFlags := map[string]string{}
+	for key, value := range resources {
+		flag := fmt.Sprintf("--resource-%v", key)
+		flags = append(flags, flag)
+		infoFlags[flag] = value
+	}
+	sort.Strings(flags)
+
+	if len(infoFlag) == 0 {
+		common.LogInfo2Quiet(fmt.Sprintf("%s resource information", appName))
+		for _, k := range flags {
+			v := infoFlags[k]
+			key := strings.Replace(strings.Replace(strings.TrimPrefix(k, "--resource-"), "-", " ", -1), ".", " ", -1)
+			common.LogVerbose(fmt.Sprintf("%s%s", Right(fmt.Sprintf("%s:", key), 31, " "), v))
+		}
+		return
+	}
+
+	for _, k := range flags {
+		v := infoFlags[k]
+		if infoFlag == k {
+			fmt.Fprintln(os.Stdout, v)
+			return
+		}
+	}
+
+	keys := reflect.ValueOf(infoFlags).MapKeys()
+	strkeys := make([]string, len(keys))
+	for i := 0; i < len(keys); i++ {
+		strkeys[i] = keys[i].String()
+	}
+	common.LogFail(fmt.Sprintf("Invalid flag passed, valid flags: %s", strings.Join(strkeys, ", ")))
+}
+
+func times(str string, n int) (out string) {
+	for i := 0; i < n; i++ {
+		out += str
+	}
+	return
+}
+
+// Right right-pads the string with pad up to len runes
+func Right(str string, length int, pad string) string {
+	return str + times(pad, length-len(str))
+}